Peter O.L. Martin
@po-leyerle-martin.bsky.social
170 followers 550 following 6 posts
Hi everyone | Bonjour tout le monde! A doctoral student at MSU, studying species - community level responses to anthropogenic change along the pond permanence gradient 🌱💧🐟 Ecology, conservation, ecotoxicology, natural science and art, and la belle langue
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po-leyerle-martin.bsky.social
Hi everyone! I think it's about time I introduced myself to the world of Bluesky: my name is Peter Martin and I'm a doctoral student wrapping up his first year in Dr. Alisha Shah's Ecological and Evolutionary Physiology lab at Michigan State's Kellogg Biological Station.
po-leyerle-martin.bsky.social
I wanted to share this photo essay that Gavin Hutchings, the KBS 2025 external communications intern, wrote on the Shah lab's work at the KBS Pond Lab facility. It's a lovely piece that showcases some members of the wonderful group we had this summer!!
www.kbs.msu.edu
po-leyerle-martin.bsky.social
The dog days are here! Vernal pool water levels are falling, which means that the life cycles of their inhabitants are winding down too. Here are some images from a Michigan field site: a time lapse over a few weeks of the same pool, and an inhabitant, Lestes rectangularis (the Slender Spreadwing)
po-leyerle-martin.bsky.social
I'm looking forward to starting to post photos from my field work that capture the incredible beauty and diversity of the freshwater habitats I work in! And of course I'll post research and publication updates as they happen :)
po-leyerle-martin.bsky.social
I'm now researching how freshwater communities along the pond-permanence gradient (vernal pools to deep lakes) are responding to climate change stressors (warming temperatures, oxygen availability). My key group for this work (at the moment) is Lestes damselflies (two different species shown below)
po-leyerle-martin.bsky.social
I got my undergraduate degree from Notre Dame, where I worked on PFAS contaminant research in the lab of Dr. Gary Lamberti for three years (picture of me finding my first ever longnose gar during summer sampling for a different project of the lab, apologies for missing #GarWeek by a mile ;) )
po-leyerle-martin.bsky.social
Hi everyone! I think it's about time I introduced myself to the world of Bluesky: my name is Peter Martin and I'm a doctoral student wrapping up his first year in Dr. Alisha Shah's Ecological and Evolutionary Physiology lab at Michigan State's Kellogg Biological Station.
Reposted by Peter O.L. Martin
erininthemorning.com
Ever wonder what snow in the swamp would look like? This is 5 miles into the Louisiana swamps in the Atchafalaya basin... it's unreal... having lived down there for the first 28 years of my life, we never saw anything like this.

Smashed records.

Curtesy of Garrett Roberts.
Reposted by Peter O.L. Martin
drkatfish.bsky.social
During the spring spawning time, male striped shiners turn a pinkish color and develop tubercles (small bumps) on their heads. While they'll sometimes build their own nests out of stones, they'll also often share/borrow the pre-made nests of other species like the hornyhead chub #25DaysofFishmas
A male striped shiner showing the pinkish coloration and spawning tubercles on the head
Reposted by Peter O.L. Martin
drkatfish.bsky.social
As a fish that needs clear, fast-moving streams + rivers, the gilt darter can be a canary in a coal mine when it comes to pollution and habitat loss - many of the extirpations from its historical range have been caused by increased siltation as a result of run-off + building of dams #25DaysofFishmas
A male gilt darter
Reposted by Peter O.L. Martin
jopabinia.bsky.social
The closest known relative of insects is WEIRD! Remipedes live in marine caves (you have to cave dive) and are venomous. Their names are fun: Godzillius & Morlockia.

How did insects go from a common ancestor with these guys onto land? Here's one idea (but no fossils so we don't know)!

#Crustmas 🧪🦑
Remipedes of the Turks and Caicos Islands. They are all slender, eyeless crustaceans with about 20-40 pairs of trunk limbs. A) Godzillius robustus; B) Kaloketos pilosus; C) Lasionectes entrichoma; D) Micropacter yagerae; E) Morlockia sp. nov. All photos by Jørgen Olesen. Images not to scale.
Gonzalez et al 2020 
https://digitalcommons.usf.edu/ijs/vol49/iss2/1/ Diagram showing the phylogeny of pancrustaceans in the ocean, leading to Cephalocarida in benthic marine habitats, Branchiopoda in ephemeral freshwater habitats, and then branching separately to Remipedia in anchialine caves and the hexapod groups steadily going onto land.

von Reumont B, Edgecombe GD. 2020. Crustaceans and insect origins. In: Poore GCB, Thiel M, editors. Evolution and biogeog­raphy. Vol. 8. Nat hist Crustacea. Oxford: Oxford Univ Press.
Reposted by Peter O.L. Martin
drkatfish.bsky.social
Of the 3 gar species found in the #GreatLakes, it's pretty easy to distinguish the longnose gar by its long, narrow snout that’s >2x as long as the rest of the head. While they do have some spots (more than the shortnose but fewer than the spotted), the schnoz really gives them away #25DaysofFishmas
A diagram showing the differences in head shape among three species of gar; from left to right: shortnose, spotted, and longnose
Reposted by Peter O.L. Martin
drkatfish.bsky.social
All that glitters is not gold ✨

Despite the name - even the scientific name “auratus” means “gilded” - goldfish coloration can vary from the typical bright orange to olive/tan. Those found in the wild are often a muted olive-brown (though you may still see some bright orange ones!) #25DaysofFishmas
Many invasive goldfish collected from the Great Lakes on a table; there are a mix of brown-olive and bright orange colored fish