Tag Archives: Research

Fly orgy

One of my first and most popular posts is the Collembolan orgy.  I get hits from it nearly every day… you know, people searching for the word ‘orgy’.  Well, with a second post entitled so, Google will hopefully up Montegraphia’s rank for the keyword… I’ll get even more curious folks.

Anyway, I collected a few of these guys for Dr. Foote.  They seem to be everywhere in the wetland, but something about this Nymphea flower caused them to react a bit differently.  Are they pollen eaters?

Another thing; How do I sweep for flies in a wetland?  When the net gets wet, it is extremely difficult to pull flies out into the kill jar.

Breeding flies on Nymphea pulchella - 10.17.2009 - 10.41.46
Breeding flies on Nymphea pulchella - 10.17.2009 - 10.29.56 Breeding flies on Nymphea pulchella - 10.17.2009 - 10.35.28

The Thalia

As I mentioned before, the Thalia is quite tall.  On the way to the fence, it peaks around 3 m high in waist deep water.  In other areas, there are points where the Thalia approaches 4 m and is incredible difficult to pass through.

Again, much of the Thalia has been consumed by a moth larva (the moths themselves emerge around dusk and fly across the wetland by the millions!).  What is left by the larva are stems and razor sharp, pointed ‘leaves’.  Essentially, all that remains of the leaves is the center, supporting vein.  Whole leaves look similar to banana leaves.  It’s interesting that this defoliation is occurring at flower/seed set for the plants.  As Mark pointed out, what implications does this have for the recruitment?  I haven’t encountered any untouched plants, but it would be interesting to see if seeds are more numerous or weigh more (or something along those ‘fecundity’ lines).  The plant is perennial too, and I wonder if the herbivory influences underground energy storage and likelihood that an individual will survive to the next season.

Tall Thalia genticulata - 10.14.2009 - 08.20.34 Thalia herbivory - 10.15.2009 - 11.49.32

Stung

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While Boa and I machete’d through 7 km of Thalia today collecting bags filled with nothing, I was stung by a wasp on the lip.  What hurts worse than that, however, is the fact that I haven’t take a single pictures in Costa Rica yet!  I’ve been busy, hot and tired.  Everything seems to take twice as long because the wetland vegetation is 5 times as thick.

So, in honor of the wasp next I destroyed today, here is a wasp found at Jennings’ Woods, with an incredible ovipositor/abdomen.

Trendy

Some of my first attempts to take some trendy macro photographs of various actions.  These are a couple of samples of macro photos I took of research in San Ramon.   Allison was usually in charge of releasing and calling out artificial leaves into the streams and Mike was timing the releases – thus, our two hand models.  I wish that I had played around with the depth of field a little more on these, but I still think they came out well.  It’s difficult to take this type of photograph in the field, particularly in a dark, canopy-covered stream bed.

Litter release - Rio Nai 4-4-2009 7-20-10 AM Litter release - Rio Nai 4-4-2009 7-20-53 AM

The Thalia moth returns

The moth caterpillar that consumed much of the Thalia geniculata in the Catalina sector has come to the Palo Verde sector.  I need to develop this…

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On the edges of the broad leaves of the Thalia, small folded over 'tents' are visible.

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A close up the of the 'tents' that house the caterpillars.

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Some out of focus eggs, both hatched and un-hatched.

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A caterpillar I removed from his hiding place...