You are viewing a read-only archive of the Blogs.Harvard network. Learn more.

That Was the Week that Was

1

For the first part of the week, the new pep-talk motivation strategy was working quite well. I finally started down the list of Cretaceous taxa to add to the morphospace, and though it was slow, I was making progress, and that felt pretty good.

On Wednesday, however, Andy asked me to lead the discussion for the dreaded Pearson-Johnston-Knoll joint lab group meeting on Friday, on a paper of my choice. I was in no position to decline, given that I haven’t presented anything at lab meetings for several years, and have in fact abdicated from even attending them, as they are completely unproductive for me: it always ends up as a discussion among faculty (or between them, if it’s only two) witnessed by a large group of 10-30 silent graduate students and post-docs.

So I sank the better part of three days into catching up on three years of silica/diatom literature, choosing two papers, trying to read and understand them, pull together a few slides, and come up with discussion points. Predictably enough, the meeting went exactly as described above (Andy, Radcliffe visitor Paul Falkowski, and Zoe where literally the only other people to speak during the entire ninety minute meeting).

Strangely, though, it was a decent discussion, besides being utterly weird because it was 4 people talking in a room of about 25. I felt that it was oddly worthwhile to throw myself deeply into thinking about a couple of complicated problems for a while, and oddly engaging to lock antlers with Paul, who is terrifyingly sharp and very knowledgeable. His engagement in the material (versus the 21 others in the room who were completely still for the entire time) somewhat made up for his dickish “you must be in your 3rd year” remark the other week.

Perhaps the most vindicating part of the interaction was after we had finished and were walking out of HUCE we got into a discussion about the greater linkage between the silica cycle and the carbon cycle through silicate weathering. Paul brought it up and I was staggered, because this notion that accounting for silica in quantifying past changes in the global carbon cycle (through exercises like Berner’s “geocarb”/”geocarbsulf” models) was something that had struck me very early on in my time at Harvard. I had tried to sell both Andy and Dan on the idea, both of whom were very dismissive of it. Dan to the extent of falling asleep during my presentation on the matter in his class.

But Paul seemed to be quite excited about it, and seemed to understand exactly how this was important—and suggested that we get together and draw up some equations to describe it all… That was quite rewarding, and vindicating. I’m not such an idiot for thinking about these things after all. Fuck them all. Perhaps the biggest idiot I’ve ever been is in listening to others’ advice or waiting for “senior” scientists’ approval of my ideas. (How ironic, then, that this vindication has to come through a senior scientists’ approval…)

In other news, Mateo offered for me to join a dissertation writing group—so far just him and one other student. My first response was “I’m not ready”, but in further discussion and upon reflection I realized that it’s not too early to start, and it would probably be extremely helpful for me to start to think and write about the big-picture background of what I’m doing, rather than just sinking deeper into the morass of the ground-level mechanical exercise of the research grunt work itself. I haven’t yet gotten myself to the point of accepting his invitation yet, though, since I’ve also felt extremely overwhelmed during the past week, and the thought of adding another commitment makes me a little queasy. Something to think on a little more.

 

The Great Leap Forward (2.0): Day III

1

It’s a little later than I had hoped, again, but the weather was beautiful this morning and I wasn’t willing to sacrifice an 8-miler in favor of an extra hour of work. I’m sure that time will come soon enough in the course of my PhD… No use in burning out before the finish line is even in sight. (Just to confuse things by throwing in a work-sport metaphor in distinguishing work and sport priorities.) Right now, though, I want to sprint through the ten remaining genera on my list, so I can make that first trip over to the Herbarium and throw myself into the delightful must of real paper.

Rylandsia. Round mentions the genus in the section on Asterolampra, and refers to a 1980 paper by Gombos, which is in the Farlow, and I’ve put on my list. Two species are described in the Bolli volume, which may help a little. I’ve got a paper on the list, so I’m moving on. To keep things moving. If the Gombos paper doesn’t deliver, I can always invest more time in googlation then.

Sceptroneis. This genus is actually in Round, so I must have just skipped that line in the Excel file accidentally. Awesome. Even better, the next entry in the list is a misspelling of Sceptroneis, so on I go.

Simonseniella and Simonsenella (of which presumably one is misspelled) are not in Round at all, although there is an entry for Simonsenia, with a reference to a 1979 paper in the journal Bacillaria. Fortunately, AlgaeBase had a cryptic reference to a 1991 paper by Fenner (which I eventually found, via a chain of references in several other papers, to be in the ODP SR), where this genus is erected. It refers to SEM images in an ODP IR paper, 1985 by Akiba and Yanagisawa. Struggled a little in describing this taxon on my character key, because its valves are vertically elongated (like Rhizosolenia, from which the genus was split), and it’s not clear whether it’s correct to refer to the steep sides of the valve as mantles or as an inclined valve face…

Sphynctolethus. Round mentions this genus as a link between Hemiaulus and the extant Hemiauloideae, and refers to a 1986 paper by Sims for a description. This reference (need I even say it?) is in the Farlow, so onto the list it goes. Round also—alert, project idea!—suggests that:

“There is little doubt that selection since the Cretaceous has eliminated many species of Hemiaulus, leaving only the lightly silicified, rather delicate forms.”

Would be possible application of the FIB technique, applied only to one, more narrowly-cast clade, to measure changes in silicification through time.

Stephanogonia. This is an Ehrenberg genus, original reference from 1844. And as much as I admire Ehrenberg, I’m not confident that’ll be a terrifically useful description for my purposes. Web of Knowledge throws up a Hungarian conference volume from 1982… if there’s nothing else, perhaps I’ll try to retrieve that (it’s in the periodicals section in the science library). Page 437 in Van Heurck has a terse few words and a basic sketch. Found an LM image in a DSDP report, by Hajós, 1976, but nothing else, and decided to move along.

Trochosira. The appendix in Round refers to a 1988 paper by Sims in Diatom Research, that promises a recent description. Added to list.

Tropidoneis. Round suggests on p. 588 that Reimer (in Patrick & Reimer, 1975) reason for calling Tropidoneis by the name Round uses, Plagiotropis. It’s not clear what the reasoning for retaining the name would be, or whether I should just go ahead and code these two genera under the same name. Perhaps that’s what I should do, since it appears that Plagiotropis doesn’t actually show up in the Neptune genus list, so I’m not confusing things too much.

And, finally (yes!), Xanthiopyxis, again appears on the list of genera in Round (p. 52) deemed to be resting stages of, possibly, Chaetoceros. And, with that, I’m through—it’s 1:29 on Friday, and I’ve achieved my goal! Albeit, my baseline minimal goal, but I do still have an afternoon, and I’ve achieved a goal I set myself.

The next step is to put together my list of references for clarity, so that I can just hand it over to the Farlow librarian. Upon checking the Farlow library’s website, I realized I won’t actually be able to go and retrieve my materials until Monday, since they are only open weekdays from 9-noon. Compiling the list took me up until cookie hour, after which it was time to (very quickly!) skim through the assigned reading for lab meeting (yech).

And that was that for the day, and for the second big push. Ended with a bit of a fizzle, but I got a lot done—I’m closer to my goal in this project than I ever have been. So I’m going to pat myself on the back a little. Pat, pat. Well done.

Paper Idea: Radiolarian Feeding Strategies through Time

ø

It’s an idea I had a few years ago, when I first read the paper on correlations between radiolarian skeletal morphology and feeding ecology, but it occurred to me again today: Matsuoka identifies four feeding strategies associated with four basic morphotypes of radiolarians. If I were to examine the relative abundance of each of those four morphotypes through time, I’d be able to say something about how radiolarian feeding ecology changed through time. Cool? Maybe. It’s an idea.