Products

We identify issues and uncertainties that pose obstacles to conservation and then—in collaboration with internal and external colleagues—develop science products that help overcome those obstacles.

2021 | Marine | Planning | Science | Publications & Reports

Opportunities for Fishery Partnerships to Advance Climate-Ready Fisheries Science and Management

Serena Lomonico, Mary G Gleason, Jono R Wilson, Darcy Bradley, Kate Kauer, Richard J Bell, Thomas Dempsey

Climate change poses unprecedented challenges to the sustainable management of wild capture fisheries. Management systems that improve the flow of information so that actionable steps can be taken are critical to ensuring our ocean is resilient and healthy. In this body of work, the authors…


2021 | Marine | Science | Publications & Reports

Ecological Impact of Abandoned, Lost, and Discarded Fishing Gear

Eric Gilman, Michael Musyl, Petri Suuronen, Milani Chaloupka, Saeid Gorgin, Jono Wilson, Brandon Kuczenski

More than 4.5 million fishing vessels deploy fishing gear in the ocean every year. A significant amount of these nets, traps, lines, and floats are abandoned, lost, or discarded, threatening the health of ocean ecosystems through ghost fishing, transfer of microplastics, toxins and  invasive species,…


2021 | Freshwater | Science | Maps & Webmaps

California Natural Flows Webapp

Julie K.H. Zimmerman, Daren M. Carlisle, Jason T. May, Kirk R. Klausmeyer, Theodore E. Grantham, Larry R. Brown, Jeanette K. Howard, Nathaniel Rindlaub, Falk Schuetzenmeister

Water is essential for California’s people, economy, and environment. Centuries of water management through dams and diversion have altered the flows in many streams and rivers, which can harm the freshwater ecosystems. The Nature Conservancy and the United States Geological Survey (USGS), and other partners…


2021 | Freshwater | Terrestrial | Planning | Technology | Science | Data

Natural Communities Commonly Associated with Groundwater Version 2.0 (NCCAG 2.0)

Kirk Klausmeyer, Jeanette Howard, Melissa Rohde, Charlotte Stanley

The first step to sustainably manage groundwater dependent ecosystems (GDEs) is to identify where they are. The Nature Conservancy developed a statewide spatial database that provides locations of seeps and springs, wetlands, and vegetation likely to depend on groundwater. This database (version 2.0) is an…


2021 | Terrestrial | Science | Publications & Reports

Facilitation promotes plant invasions and indirect negative interactions

Christopher J. Lortie, Alessandro Filazzola, Charlotte Brown, Jacob Lucero, Mario Zuliani, Nargol Ghazian, Stephanie Haas, Malory Owen, H. Scott Butterfield, Emmeleia Nix, Michael Westphal

There are many pressures that influence the ecological capacity and health of drylands around the world. Shrubs are often a critical component of these systems and can function positively as foundation species through facilitation of other species. But, shrubs can also have negative and indirect effects…


2021 | Freshwater | Planning | Maps & Webmaps

ICONS: Interconnected Surface Water in the Central Valley

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…


2021 | Marine | Science | Publications & Reports

Triennial migration and philopatry in the critically endangered soupfin shark, Galeorhinus galeus

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…


2021 | Freshwater | Planning | Science | Publications & Reports

Managing Groundwater to Ensure Ecosystem Function

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…


2021 | Freshwater | Terrestrial | Planning | Science | Publications & Reports

Rewilding Agricultural Landscapes: A California Study in Rebalancing the Needs of People and Nature

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…


2021 | Terrestrial | Technology | Economics | Science | Publications & Reports

Tahoe-Central Sierra Initiative Phase 1 Restoration Wood Supply Assessment

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…


2021 | Marine | Planning | Publications & Reports

Beyond the boundaries: How regulation-centered marine protected area information improves ocean protection assessments

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…


2021 | Terrestrial | Technology | Economics | Science | Publications & Reports

Accelerating Forest Restoration: Stimulating a Forest-Restoration Economy and Rebuilding Resilience in California’s Fire-Adapted Forests

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…


2021 | Terrestrial | Science | Publications & Reports

Oren Pollak Memorial Research Fund - 2021 RFP

Brynn Pewtherer

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…


2020 | Freshwater | Terrestrial | Marine | Planning | Technology | Science | Publications & Reports

Nature-Based Climate Solutions: A Roadmap to Accelerate Action in California

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…


2020 | Freshwater | Planning | Technology | Economics | Science | Publications & Reports

Base of fresh water, groundwater salinity and well distribution across California

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…


2020 | Freshwater | Terrestrial | Technology | Science | Publications & Reports

Conservation of Mojave Desert springs and associated biota: status, threats, and policy opportunities

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…


2020 | Freshwater | Terrestrial | Marine | Science | Publications & Reports

Conservation Science Catalyst Fund - 2020 Annual Report

Brynn Pewtherer

The Nature Conservancy deploys science to help overcome major challenges facing people and nature. In today’s fast-paced world, turning threats to nature into opportunities for conservation requires agility. The Conservation Science Catalyst Fund enables our science team to mobilize quickly — and produce the information…


2020 | Freshwater | Terrestrial | Science | Publications & Reports

A meta-analysis contrasting active versus passive restoration practices in dryland agricultural ecosystems

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…


2020 | Freshwater | Terrestrial | Technology | Science | Publications & Reports

The utility of environmental DNA from sediment and water samples for recovery of observed plant and animal species from four Mojave Desert springs

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…