Jon Sweetman
@jonsweetman.bsky.social
Assistant Research Professor in Aquatic Science 🇨🇦 at Pennsylvania State University. Freshwater Ecology, contaminants, paleolimnology, aquatic invertebrates
Severe thunderstorm and tornado warning this evening. We will see how our floating emergence traps fare.. the joys of outdoor mesocosms! @masonsward.bsky.social
June 10, 2025 at 1:45 AM
Severe thunderstorm and tornado warning this evening. We will see how our floating emergence traps fare.. the joys of outdoor mesocosms! @masonsward.bsky.social
Thanks for a great meeting @freshwaterscience.bsky.social!
May 22, 2025 at 10:46 PM
Thanks for a great meeting @freshwaterscience.bsky.social!
Setting up and filling mesocosms today with @masonsward.bsky.social M
May 7, 2025 at 9:32 PM
Setting up and filling mesocosms today with @masonsward.bsky.social M
Pulling mesocosm tanks out of storage and cleaning them in preparation for summer experiment! Quill was happy to come out and help..
April 26, 2025 at 2:51 PM
Pulling mesocosm tanks out of storage and cleaning them in preparation for summer experiment! Quill was happy to come out and help..
Crane fly larvae (Tipulidae) Nice big chonker (technical term)..
April 3, 2025 at 9:41 PM
Crane fly larvae (Tipulidae) Nice big chonker (technical term)..
Sampling aquatic invertebrate substrate cages with PhD student Ibrahim Fagbohun and colleague Dan Allen in Maryland today. A little drizzly but otherwise good field day!
April 3, 2025 at 6:05 PM
Sampling aquatic invertebrate substrate cages with PhD student Ibrahim Fagbohun and colleague Dan Allen in Maryland today. A little drizzly but otherwise good field day!
Eubranchipus vernalis (Branchiopoda: Anostraca). eastern fairy shrimp #macroinvertebrates #fairyshrimp
March 21, 2025 at 4:40 PM
Eubranchipus vernalis (Branchiopoda: Anostraca). eastern fairy shrimp #macroinvertebrates #fairyshrimp
Happy Spring! Fairy shrimp (Eubranchipus vernalis) are hatching in the local vernal
ponds
ponds
March 21, 2025 at 2:40 PM
Happy Spring! Fairy shrimp (Eubranchipus vernalis) are hatching in the local vernal
ponds
ponds
A cool burrowing mayfly (Ephemeroptera: Ephemeridae) from eastern North America - from last year's class samples from a stream in central Pennsylvania. Litobrancha recurvata (McCafferty, 1971). #macroinvertebrates #Ephemeroptera
January 30, 2025 at 7:05 PM
A cool burrowing mayfly (Ephemeroptera: Ephemeridae) from eastern North America - from last year's class samples from a stream in central Pennsylvania. Litobrancha recurvata (McCafferty, 1971). #macroinvertebrates #Ephemeroptera
Winter sampling with my aquatic invertebrate ecology class! Always impressed in how diverse and abundant these streams are in the winter.
January 17, 2025 at 4:08 PM
Winter sampling with my aquatic invertebrate ecology class! Always impressed in how diverse and abundant these streams are in the winter.
Happy New Year! A couple pictures of an Ameletus spp, the comb-mouthed minnow mayfly. (Ephemeroptera: Ameletidae)
January 2, 2025 at 1:58 PM
Happy New Year! A couple pictures of an Ameletus spp, the comb-mouthed minnow mayfly. (Ephemeroptera: Ameletidae)
Mayfly gills are amazingly diverse. Often the fragile gills of Family Leptophlebiidae fall off in preserved specimens, but sometimes their relatively intact #mayflymonday #Ephemeroptera #macroinvertebrates
December 2, 2024 at 8:35 PM
Mayfly gills are amazingly diverse. Often the fragile gills of Family Leptophlebiidae fall off in preserved specimens, but sometimes their relatively intact #mayflymonday #Ephemeroptera #macroinvertebrates
Hydropsyche (Hydropsychidae: Trichoptera). Drawing from Wiggins, 1996..
November 27, 2024 at 3:03 PM
Hydropsyche (Hydropsychidae: Trichoptera). Drawing from Wiggins, 1996..
Cheumatopsyche (Hydropsychidae: Trichoptera)
November 27, 2024 at 3:00 PM
Cheumatopsyche (Hydropsychidae: Trichoptera)
Do you even flex, bro?
Drunella spp. (Ephemeroptera: Ephemerellidae) #macroinvertebrates #Ephemeroptera #mayflies #FlexFridays
Drunella spp. (Ephemeroptera: Ephemerellidae) #macroinvertebrates #Ephemeroptera #mayflies #FlexFridays
November 22, 2024 at 7:51 PM
Do you even flex, bro?
Drunella spp. (Ephemeroptera: Ephemerellidae) #macroinvertebrates #Ephemeroptera #mayflies #FlexFridays
Drunella spp. (Ephemeroptera: Ephemerellidae) #macroinvertebrates #Ephemeroptera #mayflies #FlexFridays
Mayfly larvae from Family Siphlonuridae (Ephemeroptera), central Pennsylvania, USA #macroinvertebrates #Ephemeroptera
November 22, 2024 at 2:54 PM
Mayfly larvae from Family Siphlonuridae (Ephemeroptera), central Pennsylvania, USA #macroinvertebrates #Ephemeroptera
Job Alert! My Department in Ecosystem Science & Management at Penn State University is also currently hiring two TT positions . Please spread widely.
Assistant Professor of Forest Ecophysiology
tinyurl.com/yc7xtbs2
Assistant Professor of Soil-Water Interactions
tinyurl.com/2drjp2xn
Assistant Professor of Forest Ecophysiology
tinyurl.com/yc7xtbs2
Assistant Professor of Soil-Water Interactions
tinyurl.com/2drjp2xn
November 22, 2024 at 2:35 PM
Job Alert! My Department in Ecosystem Science & Management at Penn State University is also currently hiring two TT positions . Please spread widely.
Assistant Professor of Forest Ecophysiology
tinyurl.com/yc7xtbs2
Assistant Professor of Soil-Water Interactions
tinyurl.com/2drjp2xn
Assistant Professor of Forest Ecophysiology
tinyurl.com/yc7xtbs2
Assistant Professor of Soil-Water Interactions
tinyurl.com/2drjp2xn
Job Alert: My Department At Penn State University is currently hiring a Department Head! Please share widely!
Department Head, Department of Ecosystem Science and Management
tinyurl.com/3ut96uwd
Department Head, Department of Ecosystem Science and Management
tinyurl.com/3ut96uwd
November 22, 2024 at 2:33 PM
Job Alert: My Department At Penn State University is currently hiring a Department Head! Please share widely!
Department Head, Department of Ecosystem Science and Management
tinyurl.com/3ut96uwd
Department Head, Department of Ecosystem Science and Management
tinyurl.com/3ut96uwd
Spot the stonefly larvae! #Plecoptera #MacroinvertebrateMonday
November 18, 2024 at 1:38 PM
Spot the stonefly larvae! #Plecoptera #MacroinvertebrateMonday
Fieldwork sampling macroinvertebrates in streams outside of Baltimore in early November with new PhD student Ibrahim Fagbohun and my colleague Dan Allen. Seeing how our new substrate samplers work (filled with either rocks or
Leaves). #macroinvertebrates #FallFieldwork
Leaves). #macroinvertebrates #FallFieldwork
November 18, 2024 at 1:37 PM
Fieldwork sampling macroinvertebrates in streams outside of Baltimore in early November with new PhD student Ibrahim Fagbohun and my colleague Dan Allen. Seeing how our new substrate samplers work (filled with either rocks or
Leaves). #macroinvertebrates #FallFieldwork
Leaves). #macroinvertebrates #FallFieldwork
Enjoyed a break from social media, but ready to reengage. Hi all! I’m a freshwater ecologist interested in understanding our impacts on aquatic ecosystems.
November 18, 2024 at 8:27 AM
Enjoyed a break from social media, but ready to reengage. Hi all! I’m a freshwater ecologist interested in understanding our impacts on aquatic ecosystems.