Wednesday, April 29, 2020
A Bit of Drama on the Tuolumne River...
But today was something. I was on a low bluff over the river gravels, and I happened to look down to see what looked like a huge snake (of course every snake looks really big at first). I realized it was a California Kingsnake (corrections welcome), and it was big, maybe three feet, but not huge. I got the camera out and got a few shots before it disappeared into the brush.
Monday, April 27, 2020
Can You Find the Nest? A Near-future Killdeer Family on the Tuolumne River
We watched a nest last year at the Great Valley Museum's Outdoor Nature Lab. This year, the Killdeer nest I "found" is along the Tuolumne River Parkway Trail, but not so much on the trail as on the grounds of the Waterford water treatment plant. They have gravel roads around the aeration ponds, and that's where the Killdeer put its nest. Luckily a city worker noticed and put up a traffic cone to protect the nest from being run over.
If a threat presents itself, the Killdeer will make a lot of distracting noises and actions. The Killdeer are famous for their broken-wing act by which they draw a predator away from the nest. And as you can see from the picture above, the eggs themselves are well-protected by camouflaged coloration.
I found myself wondering how the eggs avoid being fried by the sun in their rocky nest out in the open, but if you look at mama Killdeer watching her nest, you'll notice she is shading her eggs, not sitting on them.
I missed the hatching last year, but if the stars align I might get to see the babies this year, seeing as how my summer field classes got cancelled, and we are still on a shelter-in-place order. We'll see.
A final note...if you are wondering if I was invading the personal space of the bird in this picture, I was actually on a bluff around a hundred yards away. I love the zoom lens on my camera!
Posted by Garry Hayes at 8:02 PM 1 comment:
Labels: Charadrius vociferous, Killdeer, Killdeer (Charadrius vociferous), Tuolumne Parkway Trail, Tuolumne River
Monday, April 13, 2020
A Day on the California Prairie: Finding the Precious Places Near Home
Posted by Garry Hayes at 9:59 PM 6 comments:
Labels: Knights Ferry, Mother Lode, Sierra Nevada, Sierra Nevada foothills, Stanislaus River, Stanislaus Table Mountain, wildflowers
Friday, April 3, 2020
Punctuated Equilibrium and the New Academic World That We Live In (along with the rest of society)
Three weeks ago I was lecturing and running labs like a regular professor. I had never gotten around to learning Canvas or Blackboard, because my Excel program was working just fine for recording and posting grades. I never had use for Zoom, since all my classes were face-to-face in a physical classroom. Things were fine and there didn't seem to be any compelling reasons to spend weeks in training for something I wasn't planning on using.
I knew about online courses of course, and two decades ago I even taught some, after a fashion. At the time they were called telecourses, and they left me suspicious of the academic value of online instruction. In essence the students watched canned videos on geology, and needed to learn the geology for themselves by reading the textbook and answering review questions. It was very low-tech, and most students didn't retain much information in the particular learning environment. There were innovative people on our campus who were working hard to improve the process, but before the innovations could really improve that particular form of instruction, the recession put an end to all of the telecourses and I never really looked back. In the end, classes had met a need for certain students with special needs, such as lack of day-care, or medical issues that prevented them from coming on campus. But it didn't really help most of them.
|Something doesn't feel right here...|
Two weeks ago everything changed. As part of our state effort to control the COVID-19 pandemic we went remote. In an instant. I had my entire load, five classes and three labs, switched over to online instruction. It's now what I do, using Canvas, Blackboard, and Zoom after a steep learning curve over the course of just a few days. I'm not complaining, mind you. I'm grateful to be working. I just can't believe how completely life changed, how the academic landscape was suddenly transformed. I'm functioning and the classes are continuing, but it wasn't a pretty process. There are lots of glitches, but it is happening.
Something about the process made me think about life. Not my life, or the lives of those around me, but the whole adventure of life on our planet. There was something familiar in the way events unfolded around me. And then it hit me: we had just survived a punctuated equilibrium evolutionary catastrophe. And I'm sure that requires a bit of explanation.
One of the greatest advances in biology and paleontology was the result of research by Charles Darwin and Alfred Wallace into evolutionary processes. Darwin is better known for describing the theory of natural selection, but Wallace had come to much the same conclusions from his independent research in Indonesia, and it is proper that both men be given equal credit. One of the expectations of the model is that evolution was a gradual process, and that eventually the fossil record would fill with all kinds of transitional species. This has come to be called phyletic gradualism. The problem is that as the decades rolled on, transitional species were found but not in the large numbers predicted by the theory. Most species just simply appear in the rocks as fully-formed separate species. It bothered many paleontologists.
|Alfred Wallace (1823-1913)|
Think of coyotes, a widespread species across North America. Most live somewhere in the 'average' climate of the region, not too hot or cold, not too dry or humid. But to the north, there would be populations living in very cold environments at the edge of their tolerances. Over time natural selection would produce individuals with heavier coats of fur, and perhaps the ability to store more energy in the form of fat stores. They might not be numerous, and it would be unlikely that many of them would ever become part of the fossil record. But they could be considered a different species, especially if their range no longer merged with the average coyote. They are the fat furry coyotes.
But then a series of intense volcanic eruptions blocks out sunlight for several decades, and a climate feedback loop causes an ice age. In the suddenly cold conditions, the 'average' coyotes can't adapt, and they disappear. The fat furry coyotes from the far north are able to thrive and spread quickly into the former range of the 'average' coyotes. Much later on, the fossil record would then be filled with 'average' coyotes through many feet of sediments, but then they would appear to have been suddenly replaced by a new species, the fat, furry coyote. But in reality the fat-furrys were 'pre-adapted'.
So what happened to us?
|It's the old pre-catastrophe environment! The Paleozoic classroom.|
We've been in a period of stasis for a long time. Professors professed. Classes passively took notes. There have been gradual transitions in teaching style; slide projectors have been replaced by PowerPoint presentations. Passive listening has often been replaced by group problem-solving. Note-taking has been replaced by voice-recording. But by and large, students work in the presence of a professor, and no one had any reason to think it would ever really change.
But out there in the periphery, some changes were taking place. Some teachers and administrators thought the technology had brought us to a place where teachers didn't have to be in the physical presence of their students. They trained for and taught courses remotely. Most acknowledged that remotely-taught courses provided valuable benefits for some students, but only a few underwent the rather rigorous training required to teach remote classes in an effective manner.
But then the catastrophe occurred. We've had catastrophes before on our campus. We shut down for two weeks a year or two ago because our wildfires had polluted the air far, far beyond healthy levels. But we didn't change anything. When the air cleared, we went back to our old ways. But almost no one was thinking of the possibility of a world-wide catastrophe that would require that nearly all human beings would need to isolate themselves for weeks and months at a time. It was inconceivable.
But it happened. And in the new academic environment, conditions dictated that the only form of instruction left to us was remote online education. In this new environment, the pre-adapted, the online instructors, thrived and flourished. The rest of us learned something else. Evolution is chaotic and imperfect.
Most species have organs and structural features that they don't really need or use. Humans have a tail. Many whale species have useless femurs embedded deep within their bodies. Embryonic birds often have teeth that disappear before hatching. They are deeply imperfect organisms, but they have enough adaptations in their genetic make-up that they are able to survive. This produces cobbled-together organisms with quirks and modifications that give them just enough of an edge to survive in their habitat. And sometimes those useless bits and pieces end up being an adaptation that allows survival after all. It gives us Duck-billed Platypuses, animals with a 'bird'-like beak which lay eggs like a reptile, but have hair like a mammal. And they get by.
|Source: World Wildlife Fund|
It's been upsetting, and has required long hours to achieve any kind of success. There is a lot of uncertainty and fear. But we ARE adapting to the new normal that has been imposed on us, and I have to say I am really proud of my students. They are a bit more pre-adapted than I am to this learning style, and they have stepped up admirably to the new reality.
And I am an old platypus learning to fly...
To all my teaching friends: take care of your students, they're depending on you, but care of yourselves too. And to all the students: hang in there. We'll get through all this together. Stay healthy and safe. And to those who face true catastrophe in the coming weeks and months because of the corona virus, may you find hope and peace in tragedy.
Posted by Garry Hayes at 1:55 AM 3 comments:
Subscribe to: Posts (Atom)