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Join Us We are always on the lookout for creative and motivated students and visiting scholars who have a passion for studying freshwater systems and helping save the world! https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/37a6d638-aa19-4320-82dc-573a05999844/FreshwatersIllustrated_01043_ED.jpeg Home - Listen up Check out this short podcast summarizing our recent paper: Just how protected are America’s Rivers? Comte, L., Olden, J.D., Littlefield, C., Dickson, B.G., Zablocki, J., and D. Moryc. 2026. National assessment of river protection in the United States. Nature Sustainability Olden, J.D., Comte, L., Littlefield, C., Dickson, B.G., Zablocki, J., and D. Moryc. 2026. Safeguarding, strengthening and expanding river protections for nature and people. Nature Sustainability https://www.oldenfish.com/publications daily 0.75 2026-04-01 https://www.oldenfish.com/group daily 0.75 2026-04-03 https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/1653780872152-RO3ZV91BH33OZ4ITYQOW/JulianOlden_HeadShot.JPG Group https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/1653781784204-1N7PV008CEHPE1697KP0/Winkowski2.jpg Group https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/1653787550093-HZOLPTOC3BOE3QGQX4S9/OldenFEC_logo.png Group https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/1654189662315-Y4E0P59KHJB1T4L5SL0Q/Chen.jpg Group https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/1654379699767-6VKTK84FK5AKTQAW26KN/Vitule.jpg Group https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/1654379766792-559OZYOFFNZL2GCEM2VC/Carvalho2.jpg Group https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/1654379946490-BNWM8G6U7ZVFTAGGG1IZ/Cucherousset.jpg Group https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/1654380072301-QS18UHPT0CBNNMCRCI9Y/Hossain.jpg Group https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/1663452666594-FMFGIF6YF83L1Z8MX3QC/Vaage3.jpg Group https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/2f547387-8e37-4fe7-907f-d1e088804b45/Jacuzzi.jpg Group https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/1662681261605-2KAAP94UNCGGO91BALHE/Faria.jpg Group https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/17fbdcb3-5cf1-4cd9-8130-105e162cbf87/Comte.jpg Group https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/3110edb8-4370-4d1d-a2da-b768d1ecbe7a/Flavien.jpg Group https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/a7f41b78-7230-477f-9e3e-4bba59d2323a/Andre-Padial.jpg Group https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/3235af80-a005-439d-8dfc-94102ee0e3f4/Chloe-Vagnon.jpg Group https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/287fcdbf-0cd1-4f38-a658-611244ad5565/Igor.jpeg Group https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/41455091-9b30-4160-9d18-a68085777592/Leticia.jpeg Group https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/4afbf6fb-9127-400d-bccc-71201d40509e/Schuerings1.JPG Group https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/a36f5b23-6425-4949-b2ee-361b49d84e05/PatrickLewis_fish_photo.jpg Group https://www.oldenfish.com/diallo daily 0.75 2024-08-16 https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/1a98690d-3d36-4b4a-b555-19017f03c215/Diallo2.jpg Diallo - Jessica Diallo I’m an aquatic ecologist with a passion for freshwater fish conservation. Invasive species are one of the leading threats to freshwater biodiversity. My research aims to understand the impacts of invasive species and how to control invasive species for community restoration. I’m currently studying the ecology of native and nonnative fishes in dryland streams of the American Southwest using stable isotope analysis and otolith aging. I’m also investigating the effectiveness of nonnative fish control strategies using Bayesian population modeling. jodiallo@uw.edu @jess_diallo Web Site https://www.oldenfish.com/winkowski daily 0.75 2022-05-29 https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/b350ae72-7e58-488e-9ab0-a23bd1049545/Winkowski3.jpg Winkowski - John Winkowski I am a PhD student in the Olden lab and a biologist with the Washington Department of Fish and Wildlife (WDFW). My research interests include understanding factors contributing to spatial heterogeneity of abiotic and biotic characteristics across riverscapes, how climate change could impact riverine systems in the future, and integration of this information into conservation and restoration strategies. For my thesis I am investigating the ecology of multiple non-native fish species and assessing impacts on native species in the Chehalis River, Washington through a combination of environmental DNA (eDNA), DNA metabarcoding and mixture modeling of predator stomach contents, and species distribution modeling. jjwink@uw.edu Google scholar https://www.oldenfish.com/fricke daily 0.75 2022-05-29 https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/8d177879-66c8-4fb9-8ae6-f60d5e696a54/Fricke2.jpg Fricke - Rachel Fricke rmfricke@uw.edu https://www.oldenfish.com/jacuzzi daily 0.75 2023-08-31 https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/db183fdb-9878-4854-8f3c-171e68e876fc/Jacuzzi2.jpg Jacuzzi - Giordano (Gio) Jacuzzi gioj@uw.edu https://www.oldenfish.com/vaage daily 0.75 2024-08-16 https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/f3ebfae3-3385-4236-bcfd-de46b47a2d22/Vaage3.jpg Vaage - Claire Vaage My research seeks to better understand the interactions between two invasive species - smallmouth bass and rusty crayfish - and the implications for threatened steelhead in the John Day River Basin, Oregon. Web Site vaage@uw.edu https://www.oldenfish.com/join-us daily 0.75 2023-08-23 https://www.oldenfish.com/alumni daily 0.75 2026-03-23 https://www.oldenfish.com/olden daily 0.75 2026-03-23 https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/2d19a291-ae1b-4fd8-8417-6f6e777f5f79/Julian_Skagit3.jpg Olden - Julian’s Story Hi, I’m Julian Olden - a Canadian who lives in the US. I conducted my undergraduate studies in the Department of Zoology at the University of Toronto (1994-1998). Here, my passion for ecological research was first sparked; specifically while hauling trammel nets choked with squirming white suckers from northern Ontario lakes. My honors project focused on the environmental and spatial determinants of fish community composition, and first exposed me to the strength of both field work and data synthesis in ecology. https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/f5d19ecd-5fdf-40dd-bde7-33f72284aa70/jackson.gif Olden Later, I received my Master’s Degree in Zoology from the University of Toronto (1998-2000) under the supervision of Donald Jackson, and working with Pedro Peres-Neto. I investigated the biogeography of freshwater fishes in Algonquin Provincial Park, Ontario. Using a combination of field and remotely-generated environmental data, I developed and compared a series of statistical modeling approaches to predicting species occurrence. This work fueled my continuing interest in applying novel statistical approaches to address complex pattern recognition problems in ecology. https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/0bf0f4ba-b179-45ff-a636-1ab56c8d4f06/IMG_0781.jpg Olden Next, I started my doctoral studies in the Ecology Program at Colorado State University (2000-2004) under the supervision of LeRoy Poff. My time in graduate school was hugely rewarding; I was passionate about advancing the study of ecohydrology, using ecological traits as a currency to understand freshwater phenomena, and learning everything I could about fishes of the American Southwest. My dissertation studies represented my first forays into riverine ecology and theoretical biology and lead to pioneering research on the process and implications of biotic homogenization for conservation. https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/1e6608fa-3980-407a-af87-a5d7e89748ca/Julian_Efishing.jpg Olden After completing my PhD studies, I was awarded a David H. Smith Conservation Postdoctoral Fellowship from Society for Conservation Biology. I conducted research in the Center for Limnology at the University of Wisconsin (2004-2006) with Jake Vander Zanden, where I developed tools to forecast the spread of freshwater invaders in Wisconsin Lake. As a Smith Fellow I was also exposed to the inner workings of conservation NGOs and was provided the wonderful opportunity to expand my research program on invasive species and water resource management into the field of conservation. https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/21216e69-f5d7-469f-9a90-e2e0949b464a/IMG_7810.JPG Olden And then I landed a faculty position in the School of Aquatic and Fishery Sciences at the University of Washington in 2006, and I’ve been here ever since (at least I refuse to take the message to leave!). I held the Worthington Endowed Professor in Fisheries Management (2022 - 2025) and the H. Mason Keeler Endowed Professor in Fisheries Management (2016 - 2022). https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/3c470fa9-c031-485c-accb-fdce6171a8d8/Julian_NZ.jpg Olden - Notable Positions Editor-in-Chief, Water Biology and Security (2025-present). External Science Advisory Board - The Nature Conservancy (2024-present) University of Canterbury – Erskine Fellow (2024) Guest Professor - Swedish University of Agricultural Sciences (2020 - 2025) Senior Associate Scientist - Conservation Science Partners (2019 - present) Adjunct Professor - Griffith University (2006 - present) Associate Editor, Frontiers in Ecology and the Environment, Ecological Applications Notable Awards ISI Most Highly Cited Researcher (2025, 2024, 2022, 2021, 2020, 2019, 2018) Scilit Top Cited Scholar (2024) Ecological Society of America - Fellow (2022) American Fisheries Society - Fellow (2020) Aldo Leopold Leadership -Fellow (2015) Ecological Society of America – Early Career Fellow (2013) Society for Conservation Biology - Early Career Conservationist Award (2010) Transactions of the American Fisheries Society, Robert L. Kendall Best Paper Award (2001) https://www.oldenfish.com/contact daily 0.75 2022-05-29 https://www.oldenfish.com/procrustes-caps daily 0.75 2023-11-25 https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/8367b842-409f-48b5-9c1d-2f5b43d221ef/Jellyfish.jpg ProcrustesCaps https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/b7873957-cd3b-4e60-a12e-a12f14bcfa86/Beaver.jpg ProcrustesCaps Beaver https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/37b506fd-5ce8-43ac-a813-7e7c22d5f128/Butterfly1.jpg ProcrustesCaps Monarch butterfly https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/326d3fb4-b233-4347-939a-ec9a9b5647d9/Pumkpinseed.jpg ProcrustesCaps Pumpkinseed Sunfish https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/8f793c9a-a26f-41af-875b-255ee2ab0be8/SeattleKraken_Flower.jpg ProcrustesCaps Flower https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/8a094654-27bf-4c2c-bf2a-67fbf94f885f/Frog.jpg ProcrustesCaps Frog https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/1654036842270-9CP3JG442AIWM7JE7C0S/Stonefly_Pteronarcys.jpg ProcrustesCaps Stonefly https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/06528c6a-a72b-48d0-8740-4f4acf345c0b/Tree_of_life1.jpg ProcrustesCaps Tree of Diversity https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/31ff79ea-ef73-4ae2-9344-97ad42b7e46d/IMG_0075+2.jpg ProcrustesCaps Octapus https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/ebb59760-726e-4ca5-8524-02cabb0e8feb/Orca.jpg ProcrustesCaps Orca - Killer Whale https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/a01c769e-e27b-45f3-9cd8-e657f402e0b7/RainbowTrout.jpg ProcrustesCaps Rainbow trout https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/b90ee21e-7354-4cb0-9046-e57790db39ae/BlueFlower.jpg ProcrustesCaps https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/8ec9e4f3-4af1-4700-8ab8-f9ac5c7f0780/IMG_8812.jpg ProcrustesCaps https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/2ca03c72-706c-4b3c-8268-fae660596de8/SeattleKraken_Flower.jpg ProcrustesCaps https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/335f5b1f-1b6d-4695-949b-848d63fb8ca6/IMG_8813+2.jpg ProcrustesCaps https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/1cad0111-766c-4382-a2e3-b20947948c11/flower_UW.jpg ProcrustesCaps https://www.oldenfish.com/lab-philosophy daily 0.75 2026-04-01 https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/46e81e32-1857-4c01-9675-2f46695c6b1b/JoinUs_Image.jpg Lab Philosophy - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.oldenfish.com/sharma daily 0.75 2024-01-22 https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/0db9c9d6-dc97-4f3f-ad9e-e187a101f171/4-Wading+across+to+take+flow+measurements+at+another+point+in+the+stream_GHNP.JPG Sharma - Dr. Aashna Sharma I am a freshwater ecologist passionate about wildlife conservation amidst the challenges of climate change and biological invasions. My primary focus lies in species conservation, which has driven me into extensive field surveys taking one off the network connectivity for days and often, months. My doctoral research journey involved field work in the high-elevation Himalayan hinterlands, where I delved into investigating the invasion pressures affecting the iconic snow trout under the unprecedented climate change. https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/8b6133b1-e4d9-44ca-843e-f27b94dcea9a/7-Collecting+data+for+life+history+traits.JPG Sharma Presently, I am honored to be one of the three Fulbright-Kalam Climate Postdoctoral Scholars from India, conducting groundbreaking research in the U.S. My project, based at the University of Washington's School of Aquatic and Fishery Sciences, mentored by Julian Olden and co-mentored by Lise Comte, revolves around pan-Indian riverscape conservation. I am exploring how climate and land-use changes synergistically affect freshwater megafauna of India, and the excitement of this work is already tangible. In the perennial debate of mountain person versus sea person, I proudly align myself with the former. Beyond the scientific realm, I have recently discovered that I love cooking :). I find solace in channeling my creativity into poetry and prose, with a recent penchant for science fiction. Well, stay tuned for some captivating science fiction pieces later this year! Email ResearchGate @Aashna_wildlife https://www.oldenfish.com/schuerings daily 0.75 2025-03-23 https://images.squarespace-cdn.com/content/v1/62923f67a5a8df179051ba85/a7bcb858-007b-4ca7-994b-62b7076a981f/Schuerings2.JPG Schuerings - Dr. Christian Schürings I am a freshwater ecologist fascinated by the complex interactions between environmental change and biodiversity. My research explores how human activities shape freshwater ecosystems, with a particular focus on disentangling large-scale patterns of degradation and recovery. Over the years, I have worked across disciplines—integrating ecology, environmental chemistry, and spatial modeling—to understand how riverine communities respond to anthropogenic pressures. My PhD research at the University of Duisburg-Essen explored the impacts of agricultural land use on river biota, combining meta-analyses, pan-European studies, and national-scale assessments linking cultivation intensity to freshwater ecological status. Building on this, I investigated how multiple stressors interact during phases of ecosystem degradation and recovery, shaping both community composition and ecological functions. Now, at the University of Washington, I am expanding my work to the intercontinental scale, with a growing focus on aquatic-terrestrial linkages. My research examines how river and floodplain restoration can enhance biodiversity and ecosystem health. By integrating large-scale datasets from Europe and North America, I aim to quantify the co-benefits of freshwater habitat restoration for both aquatic and terrestrial communities, particularly the interactions between aquatic insects and bird populations. I thrive on synthesizing large datasets, contributing to science-policy discussions, and occasionally disappearing into statistical models for days on end. Outside of research, I love spending time with my daughter and experiencing the world through her eyes. I also enjoy biking, hiking, cooking, and attempting to keep up with my ever-growing reading list. With new projects on the horizon, I’m excited to continue exploring how we can better protect and restore freshwater ecosystems in a changing world. Google Scholar cschue92@uw.edu