Author Archives: Andrew Rypel

About Andrew Rypel

Andrew L. Rypel is a Professor and the Peter B. Moyle and California Trout Chair of coldwater fish ecology at the University of California, Davis. He is a faculty member in the Department of Wildlife, Fish & Conservation Biology and Director of the Center for Watershed Sciences.

The rapid invasion of Mississippi silverside in California

by Peter B. Moyle The Mississippi silverside (Menidia audens[1]) is one of the most abundant fishes in the San Francisco Estuary and in the fresh waters of California in general. As the name indicates, it is not native to the … Continue reading

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Hiding in plain sight: newly described freshwater fishes from the Los Angeles area and elsewhere in California

By Peter B. Moyle, Nicholas Buckmaster, and Yingxin Su Lulu Miller in her wonderful 2020 book, Why Fish Don’t Exist, describes how fish exist to us humans only if they have been assigned proper names. The Santa Ana Speckled Dace … Continue reading

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Will more wildfire and precipitation extremes mussel-out California’s freshwater streams?

By Andrew J. Lawrence and Andrew L. Rypel Apocalyptic scenes of wildfires and floods are now familiar to Californians. However, the ecological impacts from these events remain understudied in California and across the world. Gaps in awareness and understanding on … Continue reading

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Green Sturgeon in California: Hidden Lives Revealed From Long-Term Tracking

By Scott F. Colborne, Lawrence W. Sheppard, Daniel R. O’Donnell, Daniel C. Reuman, Jonathan A. Walter, Gabriel P. Singer, John T. Kelly, Michael J. Thomas, and Andrew L. Rypel You gotta respect fishes that have been around since the dinosaurs, … Continue reading

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DNA Unveils New Freshwater Fish Species in California

By Peter B. Moyle & Matthew A. Campbell No doubt you have watched a crime show where DNA analysis reveals the identity of a victim or criminal. Or, you have read accounts of how Neanderthal genes are part of our … Continue reading

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Is the Drought Over? Reflections on California’s Recent Flood-Drought Combo

By Andrew L. Rypel, Jay Lund, and Carson Jeffres Early January was an unusually wild ride of atmospheric rivers. Nine sizable systems produced a train of storms beginning about New Years and lasting for several weeks across almost all of … Continue reading

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Nature’s gift to nature in early winter storms

By Jeffrey Mount, Peter B. Moyle, Andrew L. Rypel, and Carson Jeffres The current wet spell, made up of a parade of atmospheric rivers, is a welcome change from the last three years of record dry and warm conditions. For … Continue reading

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Drought and the Colorado River: Localizing Water in Los Angeles

By Erik Porse and Stephanie Pincetl In October 2022, water agencies in Southern California with Colorado River water rights announced plans to reduce water diversions. The agencies offered voluntary conservation of 400,000 acre-feet per year through 2026. This annual total … Continue reading

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California WaterBlog: 2022 In Review

By Christine Parisek The California WaterBlog is completing its 11th year. As we enter 2023, we take a moment to to thank our many readers, partners, authors, and friends. The California WaterBlog’s central mission is to provide stimulating ideas and … Continue reading

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The Largest Estuary on the West Coast of North America

By Jeffrey Mount and Wim Kimmerer For decades the San Francisco Estuary, which includes San Francisco Bay and the Sacramento-San Joaquin Delta, has been routinely described as “the largest estuary on the west coast of North America.” This appeared in … Continue reading

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