Annika T.H. Keeley, David D. Ackerly, Galli Basson, D. Richard Cameron, Lee Hannah, Nicole E. Heller, Patrick R. Huber, Patrick R. Roehrdanz, Carrie A. Schloss, James H. Thorne, Samuel Veloz, Adina M. Merenlender
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Charlotte Stanley, Kirk Klausmeyer
This dataset categorizes the rivers and streams in the Central Valley on the likelihood that they are interconnected surface water (ISW) -- surface water hydraulically connected to groundwater. The dataset includes information on the average, maximum, and minimum depth to groundwater, using groundwater elevation…
Andrew P. Nosal, Daniel P. Cartamil, Arnold J. Ammann, Lyall F. Bellquist, Noah J. Ben‐Aderet, Kayla M. Blincow, Echelle S. Burns, Eric D. Chapman, Ryan M. Freedman, A. Peter Klimley, Ryan K. Logan, Christopher G. Lowe, Brice X. Semmens, Connor F. White, Philip A. Hastings
Due to decades of heavy fishing pressure and steep population declines worldwide, the conservation status of the soupfin shark was elevated to Critically Endangered globally in 2020 by the IUCN. This species is commercially fished in the United States, but the fishery has not undergone a…
Laurel Saito, Bill Christian, Jennifer Diffley, Holly Richter, Melissa M. Rohde, Scott A. Morrison
In this paper, we describe minimum provisions for planning, managing, and monitoring groundwater in a manner that collectively can lower the risk of harm to groundwater-dependent ecosystems and species, as well as providing sustainable groundwater resources for communities. The paper has a special emphasis on…
H. Scott Butterfield, T. Rodd Kelsey, and Abigail K. Hart, Editors
As the world population grows, so does the demand for food, putting unprecedented pressure on agricultural lands. At the same time, climate change, soil degradation, and water scarcity mean that productivity of many of these lands is deteriorating. In many desert dryland regions, drinking wells…
Tom Baribault, Daniel Porter, Jessica Burton Desrocher, Douglas Larmour, Mark Rasmussen, Roy Anderson
The Tahoe-Central Sierra Initiative (TCSI) area has seen recent megafires and is highly developed, making the risk new of human-caused wildfire ignitions high. In this report, experts from Mason Bruce & Girard, The Beck Group and The Nature Conservancy assess quantities of…
Jennifer Sletten, Mimi D’Iorio, Mary G. Gleason, Alex Driedger, Timoth´e Vincent, Claire Colegrove, Dawn Wright, Virgil Zetterlind
Understanding the complex seascape of regulations that apply across U.S. ocean waters is critical for effective marine resource management. This study found that cumulative restrictions from overlapping fisheries regulations often provide stronger levels of protection than traditional marine protected areas (MPAs). About 85% of U.S. waters are…
Daniel Porter, Robert Longcor
Forests of the Sierra Nevada and across the western U.S. are under unprecedented threat from catastrophic wildfire, insect outbreaks, and drought. In this briefing paper, which was developed as a collaboration between Bain and Company and The Nature Conservancy, we assess the challenges and…
The Oren Pollak Memorial Research Fund was established in 2000 in memory of Dr. Oren Pollak, a leading grassland ecologist and restoration pioneer, as well as an ardent champion and mentor for grassland ecology students. As The Nature Conservancy’s lead ecologist in California in the…
Sydney J. Chamberlin, Michelle Passero, Ashley Conrad-Saydah, Tanushree Biswas, Charlotte K. Stanley
California’s natural and working lands – its forests, grasslands, wetlands, farmlands, rangeland, and urban green spaces – provide Californians with numerous environmental, social, and economic benefits, including greenhouse gas reductions (e.g., carbon sequestration). However, extreme heat events, droughts, floods, wildfires, development, and other anthropogenic impacts…
Mary Kang, Debra Perrone, Ziming Wang, Scott Jasechko, Melissa M. Rohde
To ensure that California’s groundwater is sustainably managed in the future and over the long-term, current state definitions of what constitutes groundwater may need to be revised, according to this research published in PNAS. A research collaboration between McGill University, University of California Santa…
Sophie S. Parker, Andy Zdon, William T. Christian, Brian S. Cohen, Maura Palacios Mejia, Naomi S. Fraga, Emily E. Curd, Kiumars Edalati, Mark A. Renshaw
This paper presents results from the Mojave Desert Springs research project, and discusses why the conservation of these groundwater-dependent ecosystems is so critical to biodiversity. The authors present results of a comprehensive survey of Mojave Desert springs including hydrological and ecological observations, and an…
M. Florencia Miguel, H. Scott Butterfield, Christopher J. Lortie
This meta-analysis provides a global synthesis of the which restoration practices – active vs. passive – are most successful at restoring plants, animals, and other ecosystem functions to dryland agricultural (grazing and farmlands) ecosystems, including the San Joaquin Valley of California where The Nature Conservancy…
Maura Palacios Mejia, Emily Curd, Kiumars Edalati, Mark A. Renshaw, Roy Dunn, Daniel Potter, Naomi Fraga, Jenna Moore, Justin Saiz, Robert Wayne, Sophie S. Parker
This paper presents results from the Mojave Desert Springs research project. The authors used an environmental DNA (eDNA) technique to assess biodiversity at four naturally occurring springs. They compared the effectiveness of detecting DNA in water and sediment with conventional field survey and…
Aviv Karasov‐Olson, Alicia K. Bird, Amy C. Collins, Emily E. Graves, Julea A. Shaw, Eric F. Tymstra, T. Rodd Kelsey, Mark W. Schwartz
Conservation biology is particularly susceptible to the knowledge‐implementation gap where academic pursuits do not always meet the needs of practitioners. Providing future practitioners with relevant training and experiences as graduate students can help narrow this gap. An example of one such experience was a partnership…
Brian Cohen, Kelsey Jessup, Sophie Parker, John Randall, Jill Sourial
Cities across Southern California are investing in new infrastructure to address the challenges of stormwater management. We promote the use of nature-based solutions to ensure projects both treat stormwater and yield multiple additional benefits. TNC’s spatial analyses, summarized in this poster, help prioritize where to site…
Melissa M. Rohde, Laurel Saito, Ryan Smith
In addition to benefiting humans, groundwater is a critical water supply to many ecosystems, providing a buffer during dry periods and critical habitat for rare and endemic species. Increasing groundwater use to meet human water demands can outcompete these ecosystem water needs, causing irreversible damage to…
Ethan Inlander, Katie Andrews, Contributors: Jennifer Chin, Sue Pollock, Mike McFadden, Scott Hardage, Scott Butterfield, Tod Rubin
With this publication, TNC in California marks a major shift in its approach to conservation easement monitoring. At the crossroads of conservation, stewardship and technology lies remote property monitoring, an emerging practice that uses airborne/satellite imagery and a seamless web-based platform. This solution to meeting…
Benjamin P. Bryant, T R. Kelsey, Adrian L. Vogl, Stacey A. Wolny, Duncan J. MacEwan, Paul C. Selmants, Tanushree Biswas, H S. Butterfield
Irrigated agriculture has grown rapidly over the last 50 years, helping food production keep pace with population growth, but also leading to significant habitat and biodiversity loss globally. Now, in some regions, land degradation and overtaxed water resources mean historical production levels may need to…
Jonathan R. B. Fisher, Stephen A. Wood, Mark A. Bradford, Rodd Kelsey
