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 | Terrestrial | Planning | Technology | Science | Publications & Reports

Combining Occurrence and Habitat Suitability Data Improve Conservation Guidance for the Giant Kangaroo Rat

Alyssa E. Semerdjian, H. Scott Butterfield, Robert Stafford, Michael F. Westphal, William T. Bean

This paper in the Journal of Wildlife Management combines nearly 20 years of remote sensing, field/trapping, and modeling data to develop a new approach to the identification and prioritization of conservation land for the giant kangaroo rat. As a keystone species in the San Joaquin…


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 | 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 | 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 | 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 | 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…


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

Bridging the knowledge‐implementation gap between agency and academia: A case study of a graduate research experience

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…


2020 | Freshwater | Terrestrial | Technology | Science | Maps & Webmaps

Planting Stormwater Solutions

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…


2020 | Terrestrial | Technology | Publications & Reports

Remote Property Monitoring at The Nature Conservancy in California

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…


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

Shaping land use change and ecosystem restoration in a water-stressed agricultural landscape to achieve multiple benefits

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…


2020 | Terrestrial | Planning | Science | Publications & Reports

Santa Ana Mountains to eastern Peninsular Range Conservation Connectivity Infrastructure Planning Project for Interstate 15 and Closely Associated Roadways

Dr. Winston Vickers, Karen C. Drayer, Trish Smith, Brian Cohen

Highways across the greater San Diego region in southern California are major barriers and causes of mortality for mountain lions and are contributing to the species’ genetic restriction and threat of extirpation. Due to their large territories, mountain lions must regularly cross highways in this…


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

Mojave Desert Springs: setting an ecological baseline

Sophie S. Parker

This article appears in the Desert Report, a news publication of the Sierra Club California/Nevada Desert Committee. The article introduces the Mojave Springs Research Project, led by The Nature Conservancy, that involves a research collaboration with UCLA, the California Botanic Garden, and Partner Engineering and…