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owinleiden.bsky.social
Onder water in Leiden.nl
@owinleiden.bsky.social
97 followers 46 following 93 posts
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Reposted by Onder water in Leiden.nl
ecoinvasions.bsky.social
The term 'invasive' (wrt #bioinvasions) remains inconsistently applied. In the 1990s, legislators began defining 'invasive' with an impact criterion - to identify a subset of nonnative species to be managed.

The definition I prefer is based exclusively on the process of spread, as explained below:
ecoinvasions.bsky.social Anthony Ricciardi @ecoinvasions.bsky.social · Nov 18
Continuing the theme of invasion terminology: I'm in a minority in this view but to me 'invasive' should refer to an exceptional ability to colonize, establish & spread -the components of the process of invasion. Impact should not be confounded with invasiveness; it is not a stage of invasion. [1/n]
November 15, 2025 at 11:45 PM
Reposted by Onder water in Leiden.nl
ecoinvasions.bsky.social
In the British Ecological Society magazine 'The Niche' (Winter 2020), Phil Hulme wrote a nice review of our new edition.
November 16, 2025 at 2:27 AM
Reposted by Onder water in Leiden.nl
ecoinvasions.bsky.social
"When ecosystems fail, supply chains stall, costs spike, and financial stability is eroded.

The World Economic Forum ranks biodiversity loss and extreme weather among the decade’s top global risks.
 Yet, most companies leave nature out of their strategic plans."
www.eco-business.com/opinion/busi...
Businesses can’t build resilience without nature strategies
Businesses must develop nature strategies and implement them swiftly to mitigate risks and build resilience in a changing world.
www.eco-business.com
November 16, 2025 at 2:36 AM
Reposted by Onder water in Leiden.nl
ecoinvasions.bsky.social
A common claim is that zebra mussels "clean" lakes. They can certainly clear the water column but also create conditions that reduce oxygen & promote toxic algal blooms:
phys.org/news/2021-06...
www.canr.msu.edu/news/telecou...
cdnsciencepub.com/doi/10.1139/...
www.greatlakesnow.org/2021/07/rese...
Telecoupling and the spillover system: Causes and effects of zebra mussels in the Great Lakes
Examining the impacts of zebra mussels in the Great Lakes and beyond.
www.canr.msu.edu
November 16, 2025 at 2:48 AM
Reposted by Onder water in Leiden.nl
maggiefox.bsky.social
We chatted with Marcela Uhart at @ucdavisvetmed.bsky.social about this a few months back - listen to her here onehealthtrust.org/news-media/p... #onehealth @onehealthtrust.bsky.social
November 14, 2025 at 4:18 PM
Reposted by Onder water in Leiden.nl
hughharrop.bsky.social
A marshmallow with wings: one of two beautiful white-headed 'Northern' Long-tailed Tits in Scalloway, Shetland today.

#BirdingScotland #UKbirding #RareBirdsUK #Birds #UKWildlife
November 13, 2025 at 5:40 PM
Reposted by Onder water in Leiden.nl
invasieveexoten.bsky.social
Nationaal Crisiscentrum in België besteedt aandacht aan invasieve exoten:
Oorzaken en gevolgen,
Wat kan jij doen?
Impact en waarschijnlijkheid,
Wat doen overheden?
Documentatie
@crisiscenterbe.bsky.social
crisiscentrum.be/nl/risicos-b...
Invasieve soorten - Crisiscentrum
Wat kan jij doen?
crisiscentrum.be
November 13, 2025 at 7:37 AM
Reposted by Onder water in Leiden.nl
hughharrop.bsky.social
All the way from Siberia: a Dusky Warbler at Sannick, Shetland last week.

#BirdingScotland #UKbirding #RareBirdsUK #Birds #UKWildlife
November 13, 2025 at 7:45 AM
Reposted by Onder water in Leiden.nl
anna-bagels.bsky.social
I spent yesterday learning how to ID Michigan's native freshwater mussels in a free workshop led by the state's top experts - 2 retired dudes sharing their accumulated knowledge of these fascinating animals

DYK mussels use a lifelike lure to attract fish, which are hosts for their parasitic larvae?
a Lampsillis mussel uses its mantle lure to attract fish which will act as the host for the mussels' parasitic larvae to develop
November 11, 2025 at 12:53 PM
Reposted by Onder water in Leiden.nl
drkatfish.bsky.social
Michigan lawmakers want to greatly increase funding for invasive mussel control research in the #GreatLakes to $500 million over the next 10 years - as Great Lakes Fishery Commission's Greg McClinchey says in this article: "Mussels are this generation’s sea lamprey" bridgemi.com/michigan-env...
Michigan lawmakers seek $500M to stop mussels, save Great Lakes whitefish - Bridge Michigan
US Reps. Debbie Dingell and Tim Walberg are planning legislation to boost research to control invasive mussels, following Bridge Michigan reporting about the impending collapse of whitefish.
bridgemi.com
November 11, 2025 at 4:49 PM
Reposted by Onder water in Leiden.nl
coralcitycamera.bsky.social
👋〰️🛸〰️ #southernstingray #stingraysofcoralcity #stingray #flyingsaucer #magiccarpet #flapflap #overhead #coralcitycamera #miami #portmiami #biscaynebay #coralcity
November 10, 2025 at 2:32 PM
Reposted by Onder water in Leiden.nl
sandeeoster.bsky.social
New study reveals rats, not just humans, drove Easter Island's deforestation. The invasive rodents devastated palm forests through relentless seed predation. The real lesson is about unintended consequences when invasive species enter vulnerable island ecosystems
medium.com/the-academic...
Rats, Not Just Humans, Drove Rapa Nui’s Deforestation, New Study Reveals
New archaeological analysis reveals the underestimated role of rats in the deforestation of Rapa Nui (Easter Island)
medium.com
November 10, 2025 at 5:01 AM
owinleiden.bsky.social
archive.is/202511061040...
November 11, 2025 at 12:24 PM
Reposted by Onder water in Leiden.nl
invasieveexoten.bsky.social
Chinese wolhandkrab met de hand gevangen uit de Giessen #Unielijst
www.hetkompashardinxveld-giessendam.nl/lokaal/diere...
Chinese wolhandkrab met de hand gevangen uit de Giessen
[HARDINXVELD-GIESSENDAM] Op dinsdag 4 november deed Wouter (11) een bijzondere vangst in De Giessen ter hoogte van het haventje bij de buitensluis. Tijdens het vissen zag hij iets bewegen en met zijn ...
www.hetkompashardinxveld-giessendam.nl
November 11, 2025 at 7:49 AM
Reposted by Onder water in Leiden.nl
ecoinvasions.bsky.social
www.cnn.com/interactive/...
A deadly fire ant has reached European shores. The insect invasion could wreak havoc
The red imported fire ant is one of the world’s most destructive invasive species. Can its spread be stopped?
www.cnn.com
November 9, 2025 at 8:47 PM
Reposted by Onder water in Leiden.nl
aquaticenby.bsky.social
And gar are suspected to have an unusually strong DNA repair apparatus, which, if proven by further studies, could aid in developing treatments against diseases like cancer. If all this isn't enough to convince you of their awesomeness, you need to follow @garlab.bsky.social to set you straight
8/8
A group of three alligator gar. The one on top is an adult, the one in the middle is an older juvenile, and the bottom one is a recently hatched juvenile
November 7, 2025 at 6:57 PM
owinleiden.bsky.social
ik waarschuwde er in 2022 al voor in @tijdschriftnb.bsky.social
noorderbreedte.nl/2022/07/12/k...
November 9, 2025 at 2:07 PM
Reposted by Onder water in Leiden.nl
miseagrant.bsky.social
Love sturgeon? Come hang out with us in Bay City on December 12 for a screening of the brand-new short documentary, "Dinosaur Fish"! The free, public event will include a Q&A panel with folks who are working hard to restore lake sturgeon in the Saginaw Bay area. Details: buff.ly/Tu9qRtM
A blonde child surrounded by adults stands over an orange bucket, receiving a baby lake sturgeon to be deposited into the nearby river Movie poster zoomed in on a juvenile lake sturgeon's long snout and the words "Dinosaur Fish"
November 4, 2025 at 1:45 PM
Reposted by Onder water in Leiden.nl
tommyowens.bsky.social
@solomonrdavid.bsky.social

This just landed in my feed on YouTube.
My first thought was "I wonder if you know about this?"
20 seconds later I had my answer...
Why Gars Deserve a Week of Their Own | Great Lakes Now
YouTube video by Great Lakes Now
youtu.be
November 4, 2025 at 3:50 AM
Reposted by Onder water in Leiden.nl
garlab.bsky.social
Some creature features!
#GarWeek
What is a gar??? We’re excited to celebrate Gar Week 2025 with posts by our GarLab team members! Swipe through to learn more about all seven gar species, including our two Minnesota native gar species: the Shortnose Gar and Longnose Gar. Comment below with your favorite gar fun fact or gar pun!
November 3, 2025 at 4:05 PM
Reposted by Onder water in Leiden.nl
garlab.bsky.social
And a few more facts. Happy #GarWeek!
What is a gar??? We’re excited to celebrate Gar Week 2025 with posts by our GarLab team members! Swipe through to learn more about all seven gar species, including our two Minnesota native gar species: the Shortnose Gar and Longnose Gar. Comment below with your favorite gar fun fact or gar pun!
November 3, 2025 at 4:06 PM
Reposted by Onder water in Leiden.nl
jjopperman.bsky.social
#WaterYear celebrates #GarWeek

and also celebrates @solomonrdavid.bsky.social for being such an effective communicator about, yes, gars, but really fish and freshwater ecosystems more broadly.

@garlab.bsky.social
November 3, 2025 at 3:52 PM
Reposted by Onder water in Leiden.nl
muellershewrote.com
This is brilliant
November 3, 2025 at 4:44 AM
Reposted by Onder water in Leiden.nl
ukirsc.bsky.social
Reminder that registration closes this week! Follow the link in the thread to sign up 🧵
ukirsc.bsky.social UKIRSC Marine Mammals @ukirsc.bsky.social · Oct 7
🐬 Registration is now OPEN for the UKIRSC 2026 Marine Mammal Conference hosted @plymuni.bsky.social 🎓A FREE event bringing together students from across the UK & Ireland to share research, connect, and learn from leading marine mammal scientists. 👇Link below

#UKIRSC2026 #MarineMammals
November 3, 2025 at 11:32 AM
Reposted by Onder water in Leiden.nl
owinleiden.bsky.social
Interessant nieuws vd andere kant van de wereld! Zie ook het vergelijkbare Leidse rivierdonderpaddenhotel uit 2018-2019, www.rhotel.nl
@ravonnederland.bsky.social
@gemeenteleiden.bsky.social
#Leiden #bullhead @numenini.bsky.social @drfishsg.bsky.social
#Stadsgrachten #boostcartoon
a drawing by BoostCartoon depicts a wooden structurele, aka hotel, with various openings. A bullhead (small fish) is lying in front of the entrance and another is on the roof, viewing the scene from above. Small and big pebbles lie scattered around the hotel, to make the environment less muddy. Zebramussels have attached themselves to the roof of the hotel and to some pebbles. two children are feeding the protected bullheads after they have been released into the bullhead-hotel in an urban canal in Leiden, the Netherlands the bullhead hotel is depicted by an in situ photograph and schematic drawing in a text. Questions are asked about the design, function and other aspects about its goal. The questions are part of the CITO examination for 16-17 year old students, like a GCSE (or sophomore, GPA).
October 31, 2025 at 11:09 AM