Tag Archives: urban ecology

2021: Year in Review

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As per usual, I’ll list out and link to the stories I chose as the most frightening, most hopeful, and most interesting each month in 2021. Then I’ll see if I have anything smart to say about how it all fits together.

Survey of the Year’s Stories and Themes

Most frightening and/or depressing stories:

  • JANUARY: A China-Taiwan military conflict is a potential start-of-World-War-III scenario. This could happen today, or this year, or never. Let’s hope for the latter. This is a near-term existential risk, but I have to break my own “rule of one” and give honorable mention to two longer-term scary things: crashing sperm counts and the climate change/fascism/genocide nexus.
  • FEBRUARY: For people who just don’t care that much about plants and animals, the elevator pitch on climate change is it is coming for our houses and it is coming for our food and water.
  • MARCH: In the U.S. upper Midwest (I don’t know if this region is better or worse than the country as a whole, or why they picked it), electric blackouts average 92 minutes per year, versus 4 minutes per year in Japan.
  • APRIL: One of the National Intelligence Council’s scenarios for 2040 involves “far-reaching changes designed to address climate change, resource depletion, and poverty following a global food catastrophe caused by climate events and environmental degradation”.
  • MAY: The Colorado River basin is drying out.
  • JUNE: For every 2 people who died of Covid-19 in the U.S. about 1 additional person died of indirect effects, such as our lack of a functioning health care system and safe streets compared to virtually all our peer countries.
  • JULY: The western-U.S. megadrought looks like it is settling in for the long haul.
  • AUGUST: The U.S. is not prepared for megadisasters. Pandemics, just to cite one example. War and climate change tipping points, just to cite two others. Solutions or at least risk mitigation measures exist, such as getting a health care system, joining the worldwide effort to deal with carbon emissions, and as for war, how about just try to avoid it?
  • SEPTEMBER: The most frightening climate change tipping points may not be the ones we hear the most about in the media (at least in my case, I was most aware of melting ice sheets in Greenland and Antarctica, collapse of ocean circulation patterns). The most damaging may be melting permafrost on land and methane hydrates underwater, both of which contain enormous amounts of methane which could set off a catastrophic and unstoppable feedback loop if released in large quantities.
  • OCTOBER: The technology (sometimes called “gain of function“) to make something like Covid-19 or something much worse in a laboratory clearly exists right now, and barriers to doing that are much lower than other types of weapons. Also, because I just couldn’t choose this month, asteroids can sneak up on us.
  • NOVEMBER: Freakonomics podcast explained that there is a strong connection between cars and violence in the United States. Because cars kill and injure people on a massive scale, they led to an expansion of police power. Police and ordinary citizens started coming into contact much more often than they had. We have no national ID system so the poor and disadvantaged often have no ID when they get stopped. Everyone has guns and everyone is jumpy. Known solutions (safe street design) and near term solutions (computer-controlled vehicles?) exist, but are we going to pursue them as a society? I guess I am feeling frightened and/or depressed today, hence my choice of category here.
  • DECEMBER: Mass migration driven by climate change-triggered disasters could be the emerging big issue for 2022 and beyond. Geopolitical instability is a likely result, not to mention enormous human suffering.

Most hopeful stories:

  • JANUARY: Computer modeling, done well, can inform decisions better than data analysis alone. An obvious statement? Well, maybe to some but it is disputed every day by others, especially staff at some government regulatory agencies I interact with.
  • FEBRUARY: It is possible that mRNA technology could cure or prevent herpes, malaria, flu, sickle cell anemia, cancer, HIV, Zika and Ebola (and obviously coronavirus). With flu and coronavirus, it may become possible to design a single shot that would protect against thousands of strains. It could also be used for nefarious purposes, and to protect against that are ideas about what a biological threat surveillance system could look like.
  • MARCH: I officially released my infrastructure plan for America, a few weeks before Joe Biden released his. None of the Sunday morning talk shows has called me to discuss so far. Unfortunately, I do not have the resources of the U.S. Treasury or Federal Reserve available to me. Of course, neither does he unless he can convince Congress to go along with at least some portion of his plans. Looking at his proposal, I think he is proposing to direct the fire hoses at the right fires (children, education, research, water, the electric grid and electric vehicles, maintenance of highways and roads, housing, and ecosystems. There is still no real planning involved, because planning needs to be done in between crises and it never is. Still, I think it is a good proposal that will pay off economically while helping real people, and I hope a substantial portion of it survives.
  • APRIL: Giant tortoises reach a state of “negligible senescense” where they simply don’t age for a long time. Humans are distant relatives of giant tortoises, so maybe we can aspire to this some day. They are not invulnerable to injury and disease.
  • MAY: An effective vaccine for malaria may be on the way. Malaria kills more children in Africa every year than Covid-19 killed people of all ages in Africa during the worst year of the pandemic. And malaria has been killing children every year for centuries and will continue long after Covid-19 is gone unless something is done.
  • JUNE: Masks, ventilation, and filtration work pretty well to prevent Covid transmission in schools. We should learn something from this and start designing much healthier schools and offices going forward. Design good ventilation and filtration into all buildings with lots of people in them. We will be healthier all the time and readier for the next pandemic. Then masks can be slapped on as a last layer of defense. Enough with the plexiglass, it’s just stupid and it’s time for it to go.
  • JULY: A new Lyme disease vaccine may be on the horizon (if you’re a human – if you are a dog, talk to your owner about getting the approved vaccine today.) I admit, I had to stretch a bit to find a positive story this month.
  • AUGUST: The Nordic welfare model works by providing excellent benefits to the middle class, which builds the public and political support to collect sufficient taxes to provide the benefits, and so on in a virtuous cycle. This is not a hopeful story for the U.S., where wealthy and powerful interests easily break the cycle with anti-tax propaganda, which ensure benefits are underfunded, inadequate, available only to the poor, and resented by middle class tax payers.
  • SEPTEMBER: Space-based solar power could finally be in our realistic near-term future. I would probably put this in the “interesting” rather than “hopeful” category most months, but I really struggled to come up with a hopeful story this month. I am at least a tiny bit hopeful this could be the “killer app” that gets humanity over the “dirty and scarce” energy hump once and for all, and lets us move on to the next layer of problems.
  • OCTOBER: The situation with fish and overfishing is actually much better than I thought.
  • NOVEMBER: Urban areas may have some ecological value after all.
  • DECEMBER: Covid-19 seems to be “disappearing” in Japan, or at least was before the Omicron wave. Maybe lessons could be learned. It seems possible that East Asian people have at least some genetic defenses over what other ethnic groups have, but I would put my money on tight border screening and an excellent public health care system. Okay, now I’m starting to feel a bit depressed again, sitting here in the U.S. where we can’t have these nice things thanks to our ignorant politicians.

Most interesting stories, that were not particularly frightening or hopeful, or perhaps were a mixture of both:

  • JANUARY: There have been fabulous advances in note taking techniques! Well, not really, but there are some time honored techniques out there that could be new and beneficial for many people to learn, and I think this is an underappreciated productivity and innovation skill that could benefit people in a lot of areas, not just students.
  • FEBRUARY: At least one serious scientist is arguing that Oumuamua was only the tip of an iceberg of extraterrestrial objects we should expect to see going forward.
  • MARCH: One study says 1-2 days per week is a sweet spot for working from home in terms of a positive economic contribution at the national scale. I think it is about right psychologically for many people too. However, this was a very theoretical simulation, and other studies attempting to measure this at the individual or firm scale have come up with a 20-50% loss in productivity. I think the jury is still out on this one, but I know from personal experience that people need to interact and communicate regularly for teams to be productive, and some people require more supervision than others, and I don’t think technology is a perfect substitute for doing these things in person so far.
  • APRIL: Hydrogen fuel cells may finally be arriving. Not so much in the U.S., where we can’t have nice things.
  • MAY: I learned about Lawrence Kohlberg, who had some ideas on the use of moral dilemmas in education.
  • JUNE: The big U.S. government UFO report was a dud. But what’s interesting about it is that we have all quietly seemed to have accepted that something is going on, even if we have no idea what it is, and this is new.
  • JULY: “Cliodynamics” is an attempt at a structured, evidence-based way to test hypotheses about history.
  • AUGUST: Ectogenesis is an idea for colonizing other planets that involves freezing embryos and putting them on a spaceship along with robots to thaw them out and raise them. Fungi could also be very useful in space, providing food, medicine, and building materials.
  • SEPTEMBER: Philip K. Dick was not only a prolific science fiction author, he also developed a comprehensive theory of religion which could possibly even be the right one. Also, possibly related but not really, if there are aliens out there they might live in creepy colonies or super-organisms like ants or termites.
  • OCTOBER: I thought about how to accelerate scientific progress: “[F]irst a round of automated numerical/computational experiments on a huge number of permutations, then a round of automated physical experiments on a subset of promising alternatives, then rounds of human-guided and/or human-performed experiments on additional subsets until you hone in on a new solution… [C]ommit resources and brains to making additional passes through the dustbin of rejected results periodically…” and finally “educating the next generation of brains now so they are online 20 years from now when you need them to take over.” Easy, right?
  • NOVEMBER: Peter Turchin continues his project to empirically test history. In this article, he says the evidence points to innovation in military technologies being driven by “world population size, connectivity between geographical areas of innovation and adoption, and critical enabling technological advances, such as iron metallurgy and horse riding“. What does not drive innovation? “state-level factors such as polity population, territorial size, or governance sophistication“. As far as the technologies coming down the pike in 2022, one “horizon scan” has identified “satellite megaconstellations, deep sea mining, floating photovoltaics, long-distance wireless energy, and ammonia as a fuel source”.
  • DECEMBER: Time reminded us of all the industries Elon Musk has disrupted so far: human-controlled, internal-combustion-fueled automobiles; spaceflight; infrastructure construction (I don’t know that he has really achieved any paradigm shifts here, but not for lack of trying), “artificial intelligence, neurotechnology, payment systems and cryptocurrency.” I’m not sure I follow a couple of these, but I think they missed satellites.

Continuing Signs of U.S. Relative Decline

Signs of U.S. decline relative to our peer group of advanced nations are all around us. I don’t know that we are in absolute decline, but I think we are now below average among the most advanced countries in the world. We are not investing in the infrastructure needed in a modern economy just to reduce friction and let the economy function. The annual length of electric blackouts in the U.S. (hours) compared to leading peers like Japan (minutes) is just one telling indicator. In March, I looked at the Build Back Better proposal and concluded that it was more like directing a firehose of money at a range of problems than an actual plan, but I hoped at least some of it would happen. My rather low but not zero expectations were met, as some limited funding was provided for “hard infrastructure” and energy/emissions projects, but little or nothing (so far, as I write this) to address our systemic failures in health care, child care, or education. The crazy violence on our streets, both gun-related and motor vehicle-related, is another indicator. Known solutions to all these problems exist and are being implemented to various extents by peer countries. Meanwhile our toxic politics and general ignorance continue to hold us back. Biden really gave it his best shot – but if this is our “once in a generation” attempt, we are headed down a road where we will no longer qualify as a member of the pack of elite countries, let alone its leader.

The Climate Change, Drought, Food, Natural Disaster, Migration and Geopolitical Instability Nexus

2021 was a pretty bad year for storms, fires, floods, and droughts. All these things affect our homes, our infrastructure, our food supply, and our water supply. Drought in particular can trigger mass migration. Mass migration can be a disaster for human rights and human dignity in and of itself, and managing it effectively is difficult even for well-intentioned governments. But an insidious related problem is that migration pressure can tend to fuel right wing populist and racist political movements. We see this happening all over the world, and the situation seems likely to get worse.

Tipping Points and other Really Bad Things We Aren’t Prepared For

We can be thankful that nothing really big and new and bad happened in 2021. My apologies to anyone reading this who lost someone or had a tough year. Of course, plenty of bad things happened to good people, and plenty of bad things happened on a regional or local scale. But while Covid-19 ground on and plenty of local and regional-scale natural disasters and conflicts occurred, there were no new planetary-scale disasters. This is good because humanity has had enough trouble dealing with Covid-19, and another major disaster hitting at the same time could be the one that brings our civilization to the breaking point.

So we have a trend of food insecurity and migration pressure creeping up on us over time, and we are not handling it well even given time to do so. Maybe we can hope that some adjustments will be made there to get the world on a sustainable track. Even if we do that, there are some really bad things that could happen suddenly. Catastrophic war is an obvious one. A truly catastrophic pandemic is another (as opposed to the moderately disastrous pandemic we have just gone through.) Creeping loss of human fertility is one that is not getting much attention, but this seems like an existential risk if it were to cross some threshold where suddenly the global population starts to drop quickly and we can’t do anything about it. Asteroids were one thing I really thought we didn’t have to worry much about on the time scale of any human alive today, but I may have been wrong about that. And finally, the most horrifying risk to me in the list above is the idea of an accelerating, runaway feedback loop of methane release from thawing permafrost or underwater methane hydrates.

We are almost certainly not managing these risks. These risks are probably not 100% avoidable, but since they are existential we should be actively working to minimize the chance of them happening, preparing to respond in real time, and preparing to recover afterward if they happen. Covid-19 was a dress rehearsal for dealing with a big global risk event, and humanity mostly failed to prepare or respond effectively. We are lucky it was one we should be able to recover from as long as we get some time before the next body blow. We not only need to prepare for much, much worse events that could happen, we need to match our preparations to the likelihood of more than one of them happening at the same time or in quick succession.

Technological Progress

Enough doom and gloom. We humans are here, alive, and many of us are physically comfortable and have much more leisure time than our ancestors. Our social, economic, and technological systems seem to be muddling through from day to day for the time being. We have intelligence, science, creativity, and problem solving abilities available to us if we choose to make use of them. Let’s see what’s going on with technology.

Biotechnology: The new mRNA technology accelerated by the pandemic opens up potential cures for a range of diseases. We need an effective biological surveillance system akin to nuclear weapons inspections (which we also need) to make sure it is not misused (oops, doom and gloom trying to creep in, but there are some ideas for this.) We have vaccines on the horizon for diseases that have been plaguing us for decades or longer, like malaria and Lyme disease. Malaria kills more children worldwide, year in and year out, than coronavirus has killed per year at its peak.

Promising energy technologies: Space based solar power may finally be getting closer to reality. Ditto for hydrogen fuel cells in vehicles, although not particularly in the U.S. (I’m not sure this is preferable to electric vehicles for everyday transportation, but it seems like a cleaner alternative to diesel and jet fuel when large amounts of power are needed in trucking, construction, and aviation, for example.)

Other technologies: We are actually using technology to catch fish in more sustainable ways, and to grow fish on farms in more sustainable ways. We are getting better at looking for extraterrestrial objects, and the more we look, the more of them we expect to see (this one is exciting and scary at the same time). We are putting satellites in orbit on an unprecedented scale. We have computers, robots, artificial intelligence of a sort, and approaches to use them to potentially accelerate scientific advancements going forward.

The State of Earth’s Ecosystems

The state and trends of the Earth’s ecosystems continue to be concerning. Climate change continues to churn through the public consciousness and our political systems, and painful as the process is I think our civilization is slowly coming to a consensus that something is happening and something needs to be done about it (decades after we should have been able to do this based on the evidence and knowledge available.) When it comes to our ecosystems, however, I think we are in the very early stages of this process. This is something I would like to focus on in this blog in the coming year. My work and family life are busy, and I have decided to take on an additional challenge of becoming a student again for the first time in the 21st century, but somehow I will persevere. If you are reading this shortly after I write it in January 2022, here’s to good luck and prosperity in the new year!

2021 garden retrospective

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Here are a few random thoughts on this year’s growing season. We had our first below-freezing temperatures here in my Philadelphia neighborhood around November 20, which is 3 or so weeks later than “average” (although I’m not sure if what is reported is really the average, or something like a 30% probability to improve the odds a bit for farmers.)

I got my son a Venus fly trap for his birthday in May. They are native to the Carolinas, which is cool, although I bought this one from California Carnivores. We looked at it for awhile, then left it in our buggy backyard for the summer where it seemed to be very, very happy. It even flowered – now a Venus fly trap flower is not a particularly breathtaking flower, but I was excited nonetheless. Most of the time, there was plenty of rain to keep it wet, but I invested in a gallon of distilled water to top it up occasionally. As I write this in early December, I’ve brought it inside for the winter. I’ll continue to give it distilled water, and no matter how sad or even dead it starts to look, I’ll keep watering it and put it back out in the spring. I threw one away a few years ago thinking it was dead, and was horrified to read later that they naturally go dormant in the winter. They can also supposedly handle some light freezes (again, think Carolinas) but not an extended deep freeze, so it seemed safest to just bring it in. My research said to put it in an “unheated garage or entryway” for the winter, but my urban home has neither of these things.

a fuzzy photo of a Venus Fly Trap flower

The “dwarf” (advertised as 15-feet but 20+ feet tall and maybe still growing) Asian pear tree grew lots of pears this years, which the squirrels really enjoyed. I picked and ate one unripe one just to get something, but there were no ripe ones left when the squirrels were done with them. The annoying thing is that they don’t actually eat all that fruit, they take a bite or two out of each one and drop the rest on the ground to rot. Luckily, I find squirrel antics fairly amusing and my family is not starving as a result of the fruit they are depriving us of.

On the first day of Christmas, my true love sent to me…a squirrel in an Asian pear tree

The Asian persimmon tree grew exactly one persimmon this year. This tree is a bit younger (4 years?) so hopefully there is more to come. The squirrels didn’t eat it – maybe they just don’t know what it is – and it was delicious. I thought I had a photo but can’t seem to find one. I believe persimmons are the most delicious fruit that most Americans have never tried. And I don’t know why – the trees are compact, prolific, pest and disease free (the flip side of this is they probably don’t have much ecological value locally), cold tolerant (there are several Japanese varieties), and the fruit is absolutely mouth watering and yet very tough on the outside which seems like it would make for easy shipping. There are native American varieties, but be warned these grow into very big trees which is why I chose the Asian variety. By the way, I am generally partial to native species, but I have not found the right native tree species that works in my small urban garden. I want trees that provide a little bit of shade for the front of the house but leave sunny areas to grow other things, and that I can easily get under or around. My basic principle is that a plant should have at least one other function, whether an ecological function or a food function, other than just looking good. Of course, plants that have all these things are awesome! But like I said, I haven’t identified the perfect tree yet that fits that bill.

Around July, my garden was clear cut (other than the trees) by a gardener hired by a neighbor. And not just mowed, but scraped absolutely to the ground. I was upset, but it was actually kind of interesting to watch how it responded. It’s a perennial garden, so it mostly grew back quickly. More aggressive and resilient plants outcompeted the less aggressive ones for the most part. Interestingly, some plants that are normally aggressive, like Black Eyed Susan, were probably about to flower when they were whacked and apparently decided they were done for the year. I assume their roots are fine and they will be back. Wild strawberries by contrast loved being mowed and took over an entire corner of the garden. There is way too much lemon balm now, even though I like lemon balm. A neighbor actually bought me some native plant seedlings after it happened, which I found really touching. So now I have an aromatic Aster and a Hubricht’s Blue Star in my garden.

After the garden was clear cut, I talked to the neighbor that (inadvertently) did it, and we agreed that I would just take over part of her garden from now on. To get things going quickly, I’ve picked a prairie seed mix (most “prairie” plants are native to the entire U.S. east of the Rockies). I’ve put down some cardboard to suppress weeds from growing back, put a mix of homemade and store-bought compost on top of that, and plan to sprinkle the seeds over the winter and see what happens in the spring. The only issue is that at least one cat has decided this bare soil makes a nice litter box. I intended to plant a fall cover crop but work, family, and life intervened to prevent that project.

Each year, I like to pick a “try again” species and a “new species”. The try again species is usually something I have tried to start from seed in a previous year without success, and still have seeds left over in my basement. This year, I finally got a sea kale seedling going. Squirrels dug it up multiple times for some reason, and it seemed to wilt during a fall heat wave, but now as we enter December it looks incredibly happy and has even flowered. We’ll see what happens. My “new species” was goldenrod variety “Golden Fleece”. I got it from a nursery out west somewhere, but the variety was originally bred at the Mount Cuba center in Delaware, which is nearby where I live and on my list of places to eventually go. It is advertised as a ground cover less than 18″ high. It is flowering and looks happy out there.

In pots, I did cherry tomatoes, Thai basil (both the “holy” variety as Indian people tend to refer to it, which Thai people insist is just “normal” Thai basil, and the “sweet” variety as Thai people refer to it, which seed companies in the U.S. consider normal Thai basil.) Both taste and smell awesome, and are much more heat and drought tolerant than Italian basil, which tends to wilt and die on me if I go away on a summer weekend. I also tried a mini-version of a polyculture mentioned in the book “Gaia’s garden”, which was fun although it didn’t really go as planned.

this year’s pots

We had a groundhog. Not exactly a rare species, but a rare siting around our urban neighborhood so fairly exciting.

a furry friend

And finally, I loved this enormous sunchoke. It was not in my garden, but was likely spread by an enterprising squirrel from my garden to a neighbor’s garden, and then forgotten. I read The Dark Tower this summer, in which God is at least sometimes embodied as a rose bush. But I am not a big rose fan. If I were any sort of deity, I might choose to be a sunchoke.

an enormous sunchoke

wolves create a landscape of fear!

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The “landscape of fear” is a thing in ecology where predators control prey behavior just by making them afraid of predation. This article compares the cost of wolf predation of livestock to the money saved when wolves keep deer away from highways. The comparison is overwhelmingly in favor of leaving the wolves to keep deer from the highways, even if they eat a few sheep.

Wolves make roadways safer, generating large economic returns to predator conservation

Recent studies uncover cascading ecological effects resulting from removing and reintroducing predators into a landscape, but little is known about effects on human lives and property. We quantify the effects of restoring wolf populations by evaluating their influence on deer–vehicle collisions (DVCs) in Wisconsin. We show that, for the average county, wolf entry reduced DVCs by 24%, yielding an economic benefit that is 63 times greater than the costs of verified wolf predation on livestock. Most of the reduction is due to a behavioral response of deer to wolves rather than through a deer population decline from wolf predation. This finding supports ecological research emphasizing the role of predators in creating a “landscape of fear.” It suggests wolves control economic damages from overabundant deer in ways that human deer hunters cannot.

PNAS

So in a rational world you would maybe take a small fraction of gas tax or toll payments and use it to compensate the farmers for their sheep, in exchange for the farmers not going after the wolves. Or you could just make it illegal to go after the wolves and try to enforce that law. Or some combination. What makes this sort of thing tough in the real world is that a small group impacted by a policy can organize and get political attention, whereas some nebulous idea of “society as a whole” is not going to organize, understand the issue, and lobby the politicians. You could maybe imagine insurance companies representing car owners and truckers getting involved in this issue, if the savings are really so dramatic.

How much ecological function can urban green space provide?

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This is an important research question, I think, as the world becomes even more urbanized. Here’s a new study:

Vegetation Type and Age Matter: How to Optimize the Provision of Ecosystem Services in Urban Parks

As cities grow, urban greenspace assumes a more central role in the provision of ecosystem services (ESS). Many ecosystem services depend on the interactions of soil-plant systems, with the quantity and quality of services affected by plant type and age. The question, however, remains whether urban greenspace can be included in the same ecological framework as non-urban greenspace. Our previous studies have contributed towards filling this knowledge gap by investigating the effects of plant functional type (evergreen trees, deciduous trees and lawn) and plant age on soil characteristics and functionality in urban greenspace, offering also a comparison with non-urban greenspace. A total of 41 urban parks and five non-urban forest sites within and adjacent to the cities of Helsinki and Lahti (Finland) were included in this project. Path analyses presented in this contribution, combined with a synthesis of previous findings, offer strong evidence that urban greenspace functions similarly to non-urban greenspace. In particular, plant functional types lead to soil environmental modifications similar to those in non-urban ecosystems. Therefore, vegetation choice upon park construction/implementation can improve the quality and quantity of ESS provided by urban greenspace. However, although vegetation modifies urban greenspace soils with time in a fashion similar to non-urban greenspace, the vegetation type effect is greater in non-urban greenspaces. To conclude, our synthesis of previous studies provides science-based guidance for urban planners who aim to optimize ESS in urban greenspaces.

Urban Forestry and Urban Greening

Ecosystem services and ecological function are not exactly the same thing. Ecological function just is. Ecosystem services are what ecological functions do for people, and fit into the mainstream economic analysis framework. Part of the issue in studying this, I think, is scale. If you look only at one site, block, or park in a city, you might conclude that ecosystems services are negligible or un-measurable. If you look at the entire network and how it is connected, you might conclude that the effects are measurable and that there are policy and design choices that could make them better.

Biodiversity is something else again. More biodiversity is not always better, if it consists of more species of rats or coronaviruses, for example. But biodiversity may be a reasonable proxy measure for how the structure of a designed urban ecosystem translates to ecological function. This is useful if ecological function itself turns out to be difficult to measure. And I think the most useful measures might be biodiversity of animals such as insects (bees, butterflies) and birds. Because the plants in urban areas are mostly the ones that people put there. Biodiversity of plants can be improved through design choices, which is a good thing but in measuring that you are largely measuring inputs to the system rather than the resulting state of the system. Measure the animals, and you are measuring the resulting state of the system.

Measuring things that flit and flutter around might seem daunting. Well, you could try to do it with cameras and image processing of some sort. Or if you are interested in insects you can focus on larva, aka caterpillars. Tracking down bee and wasp nests seems a bit more risky, and you might also have a public relations problem trying to explain why more bee and wasp nests would be a good thing. But caterpillars don’t move fast, so trained people should be able to cordon off an area and find and identify them periodically. Let’s say you did this once a week for a year at several defined points in an urban area, especially if land use changes are occurring (or maybe some places they are occurring and some places they are not occurring.) Doing the same thing in nearby forests and/or farm fields might also add worthwhile data. Now you can do some data analysis and modeling, and maybe figure out design or policy choices that would help the little critters while also benefiting or at least not pissing off people or costing them any money. If you want to fund my half-baked research proposal, let me know.

what is green infrastructure

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Here’s a paper that goes into the many definitions of green infrastructure across different disciplines, along with related concepts. I’ve certainly seen narrow definitions used in my own discipline of water resources engineering. Defining clearly what you mean by a term and sticking to that definition is actually a good thing, because it takes the power out of the words in the definition itself, and you are now defining the actual structure and/or function of something, and you can now have a conversation with someone else once they understand the definition you are using. Using words without a clear definition, or not being aware of alternate definitions or broader perspectives that are out there, is a problem, and unfortunately not an uncommon one.

2020 garden retrospective – now with more bug pictures!

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Gardening and being around my small urban garden definitely brought me some comfort during the long Covid-impacted spring, summer, and fall. A silver lining of being forced to work from home was being able to work outside some. Anyway, below I’ll just tell my story in pictures.

Black Swallowtails are not rare but they are just fun to watch, and their big fat green caterpillars are fun for the young and young at heart. In addition to bicycle tires, they like the fennel and celery in the garden, neither of which I had to plant this year. The fennel is a hardy perennial with a deep taproot that also spreads aggressively by seed. In fact, I had to start pulling fennel aggressively this year except for a couple spots where I decided it was allowed. The celery (which I mistook for flat-leafed parsley at the farmer’s market years ago) seems to be self-seeding and coming back each spring. There was no parsley in evidence in the garden this year.

Black Swallowtail

We saw quite a few monarchs around. This one is on butterfly milkweed, which really started to take over parts of the garden this year. The monarch didn’t cooperate and spread its wings for a nice photo. This should be a host plant, but sadly we did not see any Monarch caterpillars in evidence. I feel good doing my small part in a small urban garden for this endangered species. We made a brief trip to Cape May, New Jersey in October during the fall bird and butterfly migration, and this is just an amazing thing to see – Monarchs just flitting by every few minutes, adding up to millions I would imagine over time!

Some other plants you can see here are purple hyssop (slightly past its prime) and the fennel just starting to bloom. In the background is the neighbor’s ornamental grass, which is interesting but getting completely out of hand. If I didn’t constantly hack at it my garden would be gone in a few years.

Monarch on Butterfly Milkweed

Here’s another (slightly more photogenic) Monarch on a sunchoke flower. The sunchoke, which I planted last year, started to get aggressive this year. I don’t really mind because they are shallow-rooted and easy to pull where I don’t want them. I did notice some squirrels digging them up in the fall and “squirreling them away” in neighbors’ gardens, lol. The sunchokes and hyssop in particular attracted lots of bumblebees which were fun to watch but did not cooperate for photos. Mountain mint was another plant that seemed to attract lots of bumblebees.

Monarch on Sunchoke

We had a bumper crop of milkweed bugs this year. They’re harmless and I think they are super cool, but I can appreciate they might be creepy to people who just don’t like bugs. This is what the butterfly milkweed looks like after it is done flowering and starts to grow seedpods. There was also a lot of common milkweed in the garden which I didn’t plant but leave alone whenever I see it. I notice that friendly neighbors and their gardeners tend to pull theirs, which I will not judge (in case any of you are reading this) but all the more reason for me to do my small part to support native plants and ecosystems.

Milkweed Bugs

Completing the butterfly milkweed life cycle, here the seed pods are bursting open and preparing to scatter their goodness to next year’s garden. The milkweed bugs are still around, but I noticed after about this point they just started to crawl away and scatter. I don’t know exactly where they go. The white flowers you can see here are garlic chives, which are super cool and attract lots of bees and harmless little wasps. They (the garlic chives, not the pollinators) are getting just a bit aggressive though.

Butterfly Milkweed Seed Pods

This giant pumpkin vine just volunteered, probably as a result of throwing last year’s Halloween pumpkin in the compost. Either that or the squirrel’s who shredded other peoples’ Halloween pumpkins (we have learned not to put ours out too early) might have buried the seeds. It didn’t grow any pumpkins though, maybe missing some key nutrient?

Volunteer Pumpkin

The spotted lanternflies invaded Southeast Pennsylvania with a vengeance this year. This is an invasive species from Asia that is almost certainly here for good now. They didn’t do any obvious damage to my trees (including this Asian persimmon) but we will see what the future holds. They don’t bite, unlike the mosquitoes we had in abundance. We mostly worried about one particular species of virus this year, but others like west Nile, Lyme disease, and Zika are still around, and with climate change I will not be surprised if tropical diseases like Dengue are on the way. Can we apply the new vaccine development technologies to work on some of these, please?

Spotted Lanternfly on my Persimmon Tree

We had lots of stuff in pots. From left to right here, Thai “holy” basil, Asian long beans, Thai “sweet” basil, sunflowers (“Autumn beauty”, which lived up to their name and I recommend, Thai jasmine. Lots of bell peppers also volunteered this year, but no hot peppers – in past years lots Thai red peppers have been in evidence.

Pots

Maypop was my “try again” species this year. With the last few winters being so mild, I am hoping to see it again this spring. The new species I decided to add this year was a low, evergreen groundcover called bearberry. I didn’t take good pictures of it, and anyway it is not photogenic at this point, but I have high hopes for its future.

Maypop

And finally, the dwarf Asian persimmon turned a nice shade of orange to wrap up the year. It is 3 or 4 years old, and flowered but did not set any fruit this year. My other tree is a dwarf Asian pear. It had some kind of leaf spot and looked a bit sickly much of the year, but it did set a fair amount of fruit, of which the score was humans 2, squirrels the rest. They were good, and that is an all time high score for the humans!

Dwarf Asian Persimmon Fall Foliage

bumble bee watch

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If you have some free time or are looking for an outdoor project with kids, you can take pictures of bumble bees and upload them to this website. Scientists there can help you identify them and tell you if they are rare.

Bumble bees seem to like my anise hyssop, milkweed, and sunflowers especially. I tried to take a photo of one just now but it turns out they don’t always sit still for photos. There is only so much you can do for wildlife in an urban situation, but one thing you can do is plant to help bees and butterflies, then have friendly conversations with family, friends and neighbors when they ask what the heck you are doing in your “overgrown” garden and when your “weeds” make attempts to expand beyond your borders.

June 2020 in Review

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In current events, the coronavirus crisis in the U.S. is spinning out of control as I write this in early July. I made a list of trackers and simulation tools that I have looked at. Asian countries, even developing countries, pretty much have it under control, Europe is getting it under control, and the U.S. and a few other countries are melting down. Some voices are very pessimistic on the U.S. economy’s chances to come back. So of course I’m thinking about that, but I don’t have all that many novel or brilliant ideas on it so I’m choosing to write about other things below. Most frightening and/or depressing story:
  • The UN just seems to be declining into irrelevancy. I have a few ideas: (1) Add Japan, Germany, India, Brazil, and Indonesia to the Security Council, (2) transform part of the UN into something like a corporate risk management board, but focused on the issues that cause the most suffering and existential risk globally, and (3) have the General Assembly focus on writing model legislation that can be debated and adopted by national legislatures around the world.
Most hopeful story:
  • Like many people, I was terrified that the massive street demonstrations that broke out in June would repeat the tragedy of the 1918 Philadelphia war bond parade, which accelerated the spread of the flu pandemic that year. Not only does it appear that was not the case, it is now a source of great hope that Covid-19 just does not spread that easily outdoors. I hope the protests lead to some meaningful progress for our country. Meaningful progress to me would mean an end to the “war on drugs”, which I believe is the immediate root cause of much of the violence at issue in these protests, and working on the “long-term project of providing cradle-to-grave (at least cradle-to-retirement) childcare, education, and job training to people so they have the ability to earn a living, and providing generous unemployment and disability benefits to all citizens if they can’t earn a living through no fault of their own.”
Most interesting story, that was not particularly frightening or hopeful, or perhaps was a mixture of both:
  • Here’s a recipe for planting soil using reclaimed urban construction waste: 20% “excavated deep horizons” (in layman’s terms, I think this is just dirt from construction sites), 70% crushed concrete, and 10% compost

Technosols

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A technosol is an artificially created planting/structural medium from manmade materials, such as construction debris and compost. This article from Ecological Engineering journal says a mix of 20% “excavated deep horizons” (in layman’s terms, I think this is just dirt from construction sites), 70% crushed concrete, and 10% compost might work. If we truly want green cities, and we don’t want to reduce natural habitats to wastelands by harvesting materials from them to green our cities, this could be a good approach.

May 2020 in Review

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You can’t say that 2020 has not been interesting so far. The Covid-19 saga continued throughout May. I certainly continued to think about it, including a fun quote from The Stand, but my mind began turning to other topics.

 

Most frightening and/or depressing story:

  • Potential for long-term drought in some important food-producing regions around the globe should be ringing alarm bells. It’s a good thing that our political leaders’ crisis management skills have been tested by shorter-term, more obvious crises and they have passed with flying colors…doh!

Most hopeful story:

Most interesting story, that was not particularly frightening or hopeful, or perhaps was a mixture of both:

  • There are unidentified flying objects out there. They may or may not be aliens, that has not been identified. But they are objects, they are flying, and they are unidentified.