Julian Olden
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oldenfish.bsky.social
Julian Olden
@oldenfish.bsky.social
1.9K followers 870 following 72 posts

Professor @ UW | ecologist | freshwater | consumer of flat whites & craft ๐Ÿบ | gentle ๐ŸŸ squeezer | ๐Ÿ‡จ๐Ÿ‡ฆ | EiC Water Biology and Biosecurity | AE @ESA Frontiers and Eco Apps | www.oldenfish.com | Views are my own โœŠ

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Environmental science 73%
Geography 18%
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oldenfish.bsky.social
Julian Olden @oldenfish.bsky.social ยท 4d
National assessment of river protection in the U.S.

Article: doi.org/10.1038/s418...
Policy Brief: doi.org/10.1038/s418...
Rivers Explorer: map.myriver.americanrivers.org

Collaboration b/t American Rivers, Conservation Science Partners, Univ WA @americanrivers.bsky.social

Thread ๐Ÿ‘‡ | DM for PDF
Image of river protection status in the United States

oldenfish.bsky.social
Julian Olden @oldenfish.bsky.social ยท 4h
So glad that you investigated this issue! PISS is crappy, and it needs to be called out.

Reposted by Julian D. Olden

americanrivers.bsky.social
American Rivers @americanrivers.bsky.social ยท 3d
๐Ÿ—ฃ๏ธ MAJOR ANNOUNCEMENT: Over 80% of our nationโ€™s 4.4M miles of rivers arenโ€™t adequately protected!

Our brand new peer-reviewed research with Conservation Science Partners published in Nature Sustainability shows just how vulnerable our rivers are.

โžก๏ธ Learn more: www.americanrivers.org/npra-explore...

oldenfish.bsky.social
Julian Olden @oldenfish.bsky.social ยท 4d
Expanding river-specific protections, such as new federal and state Wild and Scenic Rivers and Outstanding Resource Waters, would ensure effective, durable protection measures tailored to rivers.

oldenfish.bsky.social
Julian Olden @oldenfish.bsky.social ยท 4d
Individual states can promote river protection through new or strengthened riparian buffer legislation, administrative rules, or agricultural/forestry best practices. Protecting rivers flowing through private lands, such as those offered by easements or land trust acquisitions/agreements, is key.

oldenfish.bsky.social
Julian Olden @oldenfish.bsky.social ยท 4d
Federal public lands have an outsized role in protecting rivers nationwide, and multiple-use lands provide a major opportunity to scale protections; weakening or eliminating existing environmental policy mechanisms would undermine these safeguards.

oldenfish.bsky.social
Julian Olden @oldenfish.bsky.social ยท 4d
Protection often does not coincide with other conservation objectives, where only a small fraction of watersheds with high biodiversity, habitat intactness and importance to drinking water supply are adequately protected.

oldenfish.bsky.social
Julian Olden @oldenfish.bsky.social ยท 4d
Protection is overwhelmingly driven by land-based mechanisms, which are often spatially misaligned with hotspots of freshwater biodiversity and may inadequately safeguard rivers from upstream threats. Protection is also uneven across river types (intermittent rivers less protected) and geographies.

oldenfish.bsky.social
Julian Olden @oldenfish.bsky.social ยท 4d
Americaโ€™s rivers are alarmingly under protected. Just over one-tenth (12%) of rivers in the contiguous United States and less than one-fifth (19%) nationwide are currently protected at a level deemed viable, while two-thirds remain entirely unprotected under the mechanisms assessed in this study.

oldenfish.bsky.social
Julian Olden @oldenfish.bsky.social ยท 25d
Unraveling multipredator impacts in salmon-bearing rivers using quantitative DNA metabarcoding. A wonderful collaboration with @jwinkfish.bsky.social.

@uwsafs.bsky.social @uwenvironment.bsky.social @uwfreshwater.bsky.social

๐Ÿ‘‡
esajournals.onlinelibrary.wiley.com/doi/10.1002/...

Reposted by Julian D. Olden

profchrisharrod.bsky.social
Chris Harrod @profchrisharrod.bsky.social ยท 29d
hot off the press! Led by the mighty Marie Perga, including many members of the Fooฮด-webs team, and kindly funded by the Foundation for Research on Biodiversity/CESAB

besjournals.onlinelibrary.wiley.com/doi/10.1111/...
A global estimator of C and N isotope baselines for fresh waters
Baselines are the pebbles in the shoes of isotope ecologists. The extreme variability of the isotope composition of resources at the base of food webs governs the spatial differences of consumers'...
besjournals.onlinelibrary.wiley.com

oldenfish.bsky.social
Julian Olden @oldenfish.bsky.social ยท Dec 10
A huge congrats Tim!

oldenfish.bsky.social
Julian Olden @oldenfish.bsky.social ยท Nov 28
I enjoyed your talk Miguel. It was early for me (6:30 am), but it was well worth it!

oldenfish.bsky.social
Julian Olden @oldenfish.bsky.social ยท Nov 25
Nah ... I end up buying caps on eBay. I mostly use uncrimped caps (i.e., before they are used).

oldenfish.bsky.social
Julian Olden @oldenfish.bsky.social ยท Nov 24
Late night, but there is no better feeling that having stable isotope samples all prepped! โš›๏ธ๐ŸŽ‰

oldenfish.bsky.social
Julian Olden @oldenfish.bsky.social ยท Nov 24
Finally found some time to reconnect with my caps. Red swamp crayfish in all its glory. Adding it to my office wall! @newbelgium.bsky.social @pikebrewing.bsky.social

oldenfish.bsky.social
Julian Olden @oldenfish.bsky.social ยท Nov 21
Sunrise from UW SAFS @uwsafs.bsky.social. Not a bad way to start the day! โ˜€๏ธ

oldenfish.bsky.social
Julian Olden @oldenfish.bsky.social ยท Nov 13
Thanks Corey!

Reposted by Julie L. Lockwood

oldenfish.bsky.social
Julian Olden @oldenfish.bsky.social ยท Nov 13
Is Facebook fueling the online trade in aquatic invasive species?

Survey of hobbyists indicates that over half engage in peer-to-peer organism exchange, transport across state lines & release them into the wild.

AI Podcast: open.substack.com/pub/oldenfis....

Paper: www.reabic.net/journals/mbi...
www.reabic.net

oldenfish.bsky.social
Julian Olden @oldenfish.bsky.social ยท Oct 6
The current website of the US Department of Agriculture. What a nightmare.

Reposted by Julie L. Lockwood, Trevor A. Branch

oldenfish.bsky.social
Julian Olden @oldenfish.bsky.social ยท Sep 28
I've been proud to serve as the faculty leader for this effort. It has been a pleasure to interact with passionate students and emerging science communicators for many years now! We publish annually. I encourage you to check out past issues and follow! @uwsafs.bsky.social @trevorabranch.bsky.social
fieldnotes-uw.bsky.social FieldNotes @fieldnotes-uw.bsky.social ยท Sep 28
FieldNotes (fieldnotesjournal.org) is a student-run undergraduate journal and digital storytelling platform at @uwenvironment.bsky.social. We have focused on highlighting undergraduate research and publishing through-provoking articles about gnarly environmental issues since 2018. Please follow.
FIELDNOTES
fieldnotesjournal.org

Reposted by Julian D. Olden

fieldnotes-uw.bsky.social
FieldNotes @fieldnotes-uw.bsky.social ยท Sep 28
FieldNotes (fieldnotesjournal.org) is a student-run undergraduate journal and digital storytelling platform at @uwenvironment.bsky.social. We have focused on highlighting undergraduate research and publishing through-provoking articles about gnarly environmental issues since 2018. Please follow.
FIELDNOTES
fieldnotesjournal.org

oldenfish.bsky.social
Julian Olden @oldenfish.bsky.social ยท Sep 23
Interesting! I'm on my reading list for the week.

oldenfish.bsky.social
Julian Olden @oldenfish.bsky.social ยท Sep 19
Absolutely ... and very much our message! Thanks for your comment.

oldenfish.bsky.social
Julian Olden @oldenfish.bsky.social ยท Sep 19
Funding: CESAB programme of @frbiodiv.bsky.social. Great list of co-authors and fun working group! @uwsafs.bsky.social @uwfreshwater.bsky.social @profchrisharrod.bsky.social @profchrisharrod.bsky.social

oldenfish.bsky.social
Julian Olden @oldenfish.bsky.social ยท Sep 19
Importantly, we continue to believe that morphological traits hold VALUE in depicting habitat use, ecological diversity & offering insight into fish movement! But our results do raise concerns of whether such traits are โ€˜functionalโ€™ in that they are a reasonable proxy of a species' trophic ecology.

Reposted by Joaquรญn Hortal

oldenfish.bsky.social
Julian Olden @oldenfish.bsky.social ยท Sep 19
The growing enthusiasm for trait-based ecology, particularly approaches grounded in morphological traits, is increasingly shaping science. However, we caution that this enthusiasm should not overlook the limitations of morphological traits as a meaningful lens or currency for functional inference.

oldenfish.bsky.social
Julian Olden @oldenfish.bsky.social ยท Sep 19
This study leveraged a comprehensive database of stable isotope values for fish communities worldwide. doi.org/10.1051/kmae.... And yes, stable isotopes have limitations ... isotopic vs. trophic niches. We cover all of this in our paper!
IsoFresh: A global stable isotope database of freshwater food webs | Knowledge and Management of Aquatic Ecosystems
Knowledge and management of aquatic ecosystems (formerly Bulletin Franรงais de la Pรจche et de la Pisciculture), an international journal on freshwater ecosystem
doi.org

oldenfish.bsky.social
Julian Olden @oldenfish.bsky.social ยท Sep 19
In a global test, we show that morphological traits show weak (ca. 10% var exp) associations with d13C & d15N for freshwater fish species. At the individual level, morphology explained 4% in isotopic variation within populations. Body size & jaw length explained some var, albeit not much.

oldenfish.bsky.social
Julian Olden @oldenfish.bsky.social ยท Sep 19
Support of such claims depends on the fundamental, albeit often unspoken, assumption that morphological characteristics of fish, such as body size & shape, fin configuration, & the size & orientation of the mouth and eyes, serve as reliable indicators of their feeding strategies & prey preferences.