Zach
@zcnem.bsky.social
coastal hazards & watershed health,
Philly-based, mostly thinking about trash,
rust belt offspring, views = mine, he/him
Philly-based, mostly thinking about trash,
rust belt offspring, views = mine, he/him
Pinned
Zach
@zcnem.bsky.social
· Nov 16
Hi folks! I do outreach around coastal and watershed topics in the Philly area - anywhere from vernal pools to the Delaware River coast! I’m also into music, art, writing, food, bikes, travel, and beer! Excited to make connections on here👋
Reposted by Zach
Happy new water-year! Welcome to hydrological 2027!
October 1, 2026 at 4:25 PM
Happy new water-year! Welcome to hydrological 2027!
Reposted by Zach
Always worth listening to Ellen Wohl, especially about rivers. blog.oup.com/2018/10/50th...
Of gutters and ecosystems: the 50th anniversary of the Wild and Scenic Rivers Act
“Rivers are the gutters down which flow the ruins of continents.” – Luna B. Leopold Luna Leopold understood that rivers are far more than gutters. In a
blog.oup.com
October 1, 2026 at 12:45 AM
Always worth listening to Ellen Wohl, especially about rivers. blog.oup.com/2018/10/50th...
Was at a local conference the past two days and I was telling people about this article like I was a newspaper hawker
First, state-approved beaver dam analog (BDA) in Pennsylvania article just dropped🦫🦫🦫
doi.org/10.1029/2025...
doi.org/10.1029/2025...
doi.org
October 1, 2026 at 1:34 AM
Was at a local conference the past two days and I was telling people about this article like I was a newspaper hawker
Reposted by Zach
Day 26 - #quill
A Quillback (Carpoides cyprinus). A medium-sized sucker that inhabits local rivers with gravel/sandy bottoms.
If anyone has a good tutorial on doing scales…I generally avoid them like the plague, as you can see why here.
#SciArtSeptember #SundayFishSketch #fishart #watercolor
A Quillback (Carpoides cyprinus). A medium-sized sucker that inhabits local rivers with gravel/sandy bottoms.
If anyone has a good tutorial on doing scales…I generally avoid them like the plague, as you can see why here.
#SciArtSeptember #SundayFishSketch #fishart #watercolor
September 27, 2026 at 1:22 PM
Day 26 - #quill
A Quillback (Carpoides cyprinus). A medium-sized sucker that inhabits local rivers with gravel/sandy bottoms.
If anyone has a good tutorial on doing scales…I generally avoid them like the plague, as you can see why here.
#SciArtSeptember #SundayFishSketch #fishart #watercolor
A Quillback (Carpoides cyprinus). A medium-sized sucker that inhabits local rivers with gravel/sandy bottoms.
If anyone has a good tutorial on doing scales…I generally avoid them like the plague, as you can see why here.
#SciArtSeptember #SundayFishSketch #fishart #watercolor
Reposted by Zach
“Fish” can be both singular (one individual fish) or plural (multiple fish of the same species.)
“Fishes” refers to individuals of different species.
🐟 Fish
🐟🐟🐟 Fish
🐠🐟🐡 Fishes
Now you know, and knowing is half the battle.
“Fishes” refers to individuals of different species.
🐟 Fish
🐟🐟🐟 Fish
🐠🐟🐡 Fishes
Now you know, and knowing is half the battle.
September 26, 2026 at 9:48 PM
“Fish” can be both singular (one individual fish) or plural (multiple fish of the same species.)
“Fishes” refers to individuals of different species.
🐟 Fish
🐟🐟🐟 Fish
🐠🐟🐡 Fishes
Now you know, and knowing is half the battle.
“Fishes” refers to individuals of different species.
🐟 Fish
🐟🐟🐟 Fish
🐠🐟🐡 Fishes
Now you know, and knowing is half the battle.
Reposted by Zach
Comments due TODAY! Please Speak out for fishies that USFWS wants to delist.
There's probably a mine or other awful thing the orange turd wants to grant permission to, that wants to open up, and they can't grant lease while endangered species exist!
There's probably a mine or other awful thing the orange turd wants to grant permission to, that wants to open up, and they can't grant lease while endangered species exist!
🚨 ACTION ALERT: USFWS wants to strip protections for native desert chub!
We need unique public comments in the docket before tomorrow. Do NOT copy/paste word-for-word— agency only counts unique submissions.
Talking points & guide here 👇
birdsmatter.wordpress.com/2026/09/25/t...
We need unique public comments in the docket before tomorrow. Do NOT copy/paste word-for-word— agency only counts unique submissions.
Talking points & guide here 👇
birdsmatter.wordpress.com/2026/09/25/t...
September 25, 2026 at 3:49 PM
Comments due TODAY! Please Speak out for fishies that USFWS wants to delist.
There's probably a mine or other awful thing the orange turd wants to grant permission to, that wants to open up, and they can't grant lease while endangered species exist!
There's probably a mine or other awful thing the orange turd wants to grant permission to, that wants to open up, and they can't grant lease while endangered species exist!
Reposted by Zach
Cleveland Rocks (if you're a baby sturgeon): Before juvenile lake sturgeon were released into the Cuyahoga River last year, they received tiny acoustic transmitters - now, early data shows that many are sticking close to Cleveland Harbor. signalcleveland.org/lake-erie-ba...
Lake Erie’s baby sturgeon are thriving a year after release - Signal Cleveland
Ahead of Saturday's Sturgeon Fest, we checked in on the little babies released last year. How are they doing? Early signs are promising.
signalcleveland.org
September 23, 2026 at 3:43 PM
Cleveland Rocks (if you're a baby sturgeon): Before juvenile lake sturgeon were released into the Cuyahoga River last year, they received tiny acoustic transmitters - now, early data shows that many are sticking close to Cleveland Harbor. signalcleveland.org/lake-erie-ba...
Reposted by Zach
The dam removals that get the most press tend to be superlative western ones, like the Klamath and Elwha—big rivers, big fish. For @biographic.bsky.social, I wrote about some equally vital, under-the-radar projects now restoring eastern streams, one old mill dam at a time.
#AlewivesAreTheNewSalmon
#AlewivesAreTheNewSalmon
"If eco-social anomie describes a societal forgetting, dam removal achieves the opposite—a collective remembering that cures our amnesia and unshifts our baselines."
A beautiful @bengoldfarb.bsky.social story about the centuries-old dams choking New England's rivers, & the people setting them free
A beautiful @bengoldfarb.bsky.social story about the centuries-old dams choking New England's rivers, & the people setting them free
Death by a Thousand Dams | bioGraphic
Tens of thousands of small barriers hamper fish recovery in the northeastern United States. But while the demolition of big dams out west gets the most attention, a similar revolution is revitalizing ...
biographic.com
September 22, 2026 at 9:04 PM
The dam removals that get the most press tend to be superlative western ones, like the Klamath and Elwha—big rivers, big fish. For @biographic.bsky.social, I wrote about some equally vital, under-the-radar projects now restoring eastern streams, one old mill dam at a time.
#AlewivesAreTheNewSalmon
#AlewivesAreTheNewSalmon
A hi-vis morning one might say
A great way to kick off the fall season is with 50+ public works folks in a room talking about smart salting strategies
September 22, 2026 at 4:11 PM
A hi-vis morning one might say
A great way to kick off the fall season is with 50+ public works folks in a room talking about smart salting strategies
September 22, 2026 at 4:11 PM
A great way to kick off the fall season is with 50+ public works folks in a room talking about smart salting strategies
Reposted by Zach
Happy first day of fall!!
Did you know that fall is, perhaps counterintuitively, a great time to plant things? It gives the plant time to establish their roots in the soil so that next spring they can shoot out of the soil confident in the ground they’re in.
Be a good witch and cast summon bug 🪲
Did you know that fall is, perhaps counterintuitively, a great time to plant things? It gives the plant time to establish their roots in the soil so that next spring they can shoot out of the soil confident in the ground they’re in.
Be a good witch and cast summon bug 🪲
September 22, 2026 at 2:36 PM
Happy first day of fall!!
Did you know that fall is, perhaps counterintuitively, a great time to plant things? It gives the plant time to establish their roots in the soil so that next spring they can shoot out of the soil confident in the ground they’re in.
Be a good witch and cast summon bug 🪲
Did you know that fall is, perhaps counterintuitively, a great time to plant things? It gives the plant time to establish their roots in the soil so that next spring they can shoot out of the soil confident in the ground they’re in.
Be a good witch and cast summon bug 🪲
What it looks like on a Zoom call first thing on a Monday morning
Shiners, shiners, shiners for #sundayfishsketch. Today is Red Shiner and a bonus of 9 other shiners!
September 21, 2026 at 12:56 PM
What it looks like on a Zoom call first thing on a Monday morning
Slavic bazaar in the neighborhood
September 20, 2026 at 8:21 PM
Slavic bazaar in the neighborhood
Reposted by Zach
From me: Diné NAU professor maps safe drinking water on the Navajo Nation
Diné NAU professor maps safe drinking water on the Navajo Nation
Jani Ingram set out to find water sources on the Navajo Nation that are safe to drink, and the result is an interactive map.
www.azcentral.com
September 20, 2026 at 2:38 PM
From me: Diné NAU professor maps safe drinking water on the Navajo Nation
Reposted by Zach
We tested Reynolds model for algae growth in the water column of mid-size rivers. Would love to do this again in a greener river. esajournals.onlinelibrary.wiley.com/doi/10.1002/...
Growth, transport, and recruitment of phytoplankton in a mid‐order river
Phytoplankton dynamics in rivers have long challenged growth models, which predict limited biomass accumulation due to insufficient water residence times—yet phytoplankton populations often persist d...
esajournals.onlinelibrary.wiley.com
September 18, 2026 at 4:50 PM
We tested Reynolds model for algae growth in the water column of mid-size rivers. Would love to do this again in a greener river. esajournals.onlinelibrary.wiley.com/doi/10.1002/...
Reposted by Zach
Unfortunately, media has taken the upper bound of one model estimate (among many) and run with it to say Lake Sturgeon *could* live for over 400 years.
This isn’t necessarily what the science says, and methods used are somewhat tenuous. Several other fish aging experts agree it’s an overestimate.
This isn’t necessarily what the science says, and methods used are somewhat tenuous. Several other fish aging experts agree it’s an overestimate.
Some of my elders could be more than 400 yrs old. They have seen much change in the Great Lakes
🌊🌊
www.smithsonianmag.com/science-natu...
🌊🌊
www.smithsonianmag.com/science-natu...
Some Fish in the Great Lakes Might Be More Than 400 Years Old, a Study Suggests, Outliving Around 15 Generations of Humans
Lake sturgeon may be among the longest-living vertebrates, second only to Greenland sharks, according to recent research. However, scientists note that follow-up work is necessary to clarify the speci...
www.smithsonianmag.com
September 17, 2026 at 5:07 PM
Unfortunately, media has taken the upper bound of one model estimate (among many) and run with it to say Lake Sturgeon *could* live for over 400 years.
This isn’t necessarily what the science says, and methods used are somewhat tenuous. Several other fish aging experts agree it’s an overestimate.
This isn’t necessarily what the science says, and methods used are somewhat tenuous. Several other fish aging experts agree it’s an overestimate.
Let your voice be heard by emailing [email protected]
My favorite Philly mural (Keith Haring’s We the Youth) might be the first mural to be a part of the city’s register of historic places.
September 18, 2026 at 5:13 PM
Let your voice be heard by emailing [email protected]
Reposted by Zach
Yesterday rocked! Ext Educator Lauren Stigers came to talk about aquaculture at the NOAA Great Lakes Environmental Research Lab in Ann Arbor. After the talk, a grilled rainbow trout lunch from Spring Valley Trout Farm near Dexter. Thanks to all who came to learn and enjoy fresh MI fish with us!
September 17, 2026 at 1:30 PM
Yesterday rocked! Ext Educator Lauren Stigers came to talk about aquaculture at the NOAA Great Lakes Environmental Research Lab in Ann Arbor. After the talk, a grilled rainbow trout lunch from Spring Valley Trout Farm near Dexter. Thanks to all who came to learn and enjoy fresh MI fish with us!
My favorite Philly mural (Keith Haring’s We the Youth) might be the first mural to be a part of the city’s register of historic places.
September 18, 2026 at 1:28 PM
My favorite Philly mural (Keith Haring’s We the Youth) might be the first mural to be a part of the city’s register of historic places.
Reposted by Zach
How is fish treated and managed both as a food and a natural resource in the #GreatLakes?
It's complicated!
www.frontiersin.org/journals/sus...
Our new paper digs into the topic. 🧪
It's complicated!
www.frontiersin.org/journals/sus...
Our new paper digs into the topic. 🧪
Frontiers | The complexity of fish as food and a natural resource in the U.S. Great Lakes region
The Great Lakes region contains more than 20% of the world’s surface freshwater and supports a culturally, economically, and ecologically significant seafood...
www.frontiersin.org
September 18, 2026 at 1:04 PM
How is fish treated and managed both as a food and a natural resource in the #GreatLakes?
It's complicated!
www.frontiersin.org/journals/sus...
Our new paper digs into the topic. 🧪
It's complicated!
www.frontiersin.org/journals/sus...
Our new paper digs into the topic. 🧪
Second-largest dam to ever be removed in Pennsylvania
PA Environment Digest, By David E. Hess, Former PA DEP Secretary
@paenvironmentnews.bsky.social
· Sep 2
Inquirer - Frank Kummer: 225-Foot-Long Dam On Neshaminy Creek At Tyler State Park In Bucks County To Be Removed www.inquirer.com/news/pennsyl...
‘Obsolete’ 225-foot-long dam at Tyler State Park in Bucks County will be removed
The dam's removal will begin Sept. 8. Officials say the dam impedes fish and can create dangerous conditions.
www.inquirer.com
September 17, 2026 at 2:16 PM
Second-largest dam to ever be removed in Pennsylvania
Reposted by Zach
First, state-approved beaver dam analog (BDA) in Pennsylvania article just dropped🦫🦫🦫
doi.org/10.1029/2025...
doi.org/10.1029/2025...
doi.org
September 16, 2026 at 12:51 PM
First, state-approved beaver dam analog (BDA) in Pennsylvania article just dropped🦫🦫🦫
doi.org/10.1029/2025...
doi.org/10.1029/2025...
First, state-approved beaver dam analog (BDA) in Pennsylvania article just dropped🦫🦫🦫
doi.org/10.1029/2025...
doi.org/10.1029/2025...
doi.org
September 16, 2026 at 12:51 PM
First, state-approved beaver dam analog (BDA) in Pennsylvania article just dropped🦫🦫🦫
doi.org/10.1029/2025...
doi.org/10.1029/2025...
I love when people poke fun of northeast Ohio/Cleveland especially in Philly bc I point to this and all the other watershed wins the region has had since the passing of CWA - keep up the great work!
living fossil achievement unlocked 🔓✨
the US Fish & Wildlife Service was sampling near the mouth of the Cuyahoga River and recaptured 3 Lake Sturgeon that were tagged & stocked in 2025 (2 from Rivergate Park, 1 from the Boston Mills area).
all 3 have nearly doubled in length in one year's time.
the US Fish & Wildlife Service was sampling near the mouth of the Cuyahoga River and recaptured 3 Lake Sturgeon that were tagged & stocked in 2025 (2 from Rivergate Park, 1 from the Boston Mills area).
all 3 have nearly doubled in length in one year's time.
September 15, 2026 at 6:15 PM
I love when people poke fun of northeast Ohio/Cleveland especially in Philly bc I point to this and all the other watershed wins the region has had since the passing of CWA - keep up the great work!