In California, a day’s drive can take a visitor from record-setting desert heat to glaciated peaks to temperate rainforests with the world’s tallest trees. This astounding climatic and landscape diversity has helped create a biodiversity hotspot. California is also an economic hotspot – the 6th largest economy in the world – and is home to nearly 40 million people. The demand for land for new development and farms, along with accelerating climate change, puts tremendous stress on ecosystems, and the benefits they provide.

The state’s legacy of conservation has created a network of natural and working lands that benefit people by supplying clean water, capturing carbon, and directly contributing to the state’s economic and cultural vitality through recreation, tourism, and agricultural production. Conservancy scientists work across the spectrum of ecosystem types and human land uses, to advance conservation goals that also contribute to the well-being of people in those places.

Wildlands

Nearly half of California is protected in some land status that prevents most kinds of intensive human land… >>

Harvested Landscapes

A third of California is privately-owned forestland, woodland or grassland. From redwood forests on the north coast to… >>

Cultivated Landscapes

California is the leading agricultural state in the country and it’s agriculture generates more than $45 billion annually.… >>

Urban Areas and Infrastructure

With California’s population on track to reach 50 million people, the demand for energy, water, and land will… >>

Science in Action

Freshwater | Terrestrial | Marine | Science

Research for Impact

How do we design scientific research to have impact in the world?

Terrestrial | Science

Island Fox

How do we bring the endemic island fox back from the brink of extinction?

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…


2020 | Terrestrial | Technology | Science | Data

Low-impact land use pathways to deep decarbonization of electricity

Grace C. Wu, Emily Leslie, Douglas Allen, Oluwafemi Sawyerr, D. Richard Cameron, Erica Brand, Brian Cohen, Marcela Ochoa, Arne Olson

California has ambitious climate and energy policies that call for the development of significant amounts of new zero-carbon energy by midcentury. The Power of Place study looks at multiple pathways to meet California's clean energy demand in alignment with decarbonization goals while limiting the impacts…


2020 | Terrestrial | Planning | Science | Publications & Reports

Roadmap to Restoration

Rodd Kelsey, Scott Butterfield, Abigail Hart, Ruthie Redmond, Hope Bigda-Peyton

This Policy Brief summarizes the results of a study on the potential for strategic habitat restoration in the San Joaquin Valley of California as an important part of reducing overall water demand to achieve groundwater sustainability under the Sustainable Groundwater Management Act (SGMA). It also provides policy…


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

Jack and Laura Dangermond Preserve Rangeland Management Plan

Butterfield, H.S., M. Katkowski, J. Cota, O. Sage, C. Sage, K. Easterday, D. Zeleke, L. Riege, S. Gennet, K. Lin, B. Leahy, M. Bell, M. Reynolds

Cattle grazing is the dominant land management tool TNC has to manage biodiversity and reduce the threat of catastrophic wildfire at the TNC's Jack and Laura Dangermond Preserve. This Rangeland Management Plan, intended to guide rangeland management through 2025, details the adaptive management approach TNC…


2020 | Terrestrial | Science | Publications & Reports

Habitat selection by spotted owls after a megafire reflects their adaptation to historical frequent-fire regimes

Gavin M. Jones, H. Anu Kramer, Sheila A. Whitmore, William J. Berigan, Douglas J. Tempel, Connor M. Wood, Brendan K. Hobart, Tedward Erker, Fidelis A. Atuo, Nicole F. Pietrunti, Rodd Kelsey, R. J. Gutierrez, M. Zachariah Peery

This study examined spotted owl habitat selection after the King Fire in California using satellite tracking of 26 different owls . The authors found that whether severe fire was "good" or "bad" for owls depended on patch size and configuration: owls selected smaller but avoided…


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

Jack and Laura Dangermond Preserve Integrated Resources Management Plan

Butterfield, H.S., M. Reynolds , M.G. Gleason, M. Merrifield, B.S. Cohen, W.N. Heady, D. Cameron, T. Rick, E. Inlander, M. Katkowski, L. Riege, J. Knapp, S. Gennet, G. Gorga, K. Lin, K. Easterday, B. Leahy, M. Bell

This Plan frames the biological and cultural significance and provides the short- and long-term goals, objectives, and priority actions for the Jack and Laura Dangermond Preserve.


2020 | Terrestrial | Science | Publications & Reports

Effects of Field and Landscape Scale Habitat on Insect and Bird Damage to Sunflowers

Sara M. Kross, Breanna L. Martinico, Ryan P. Bourbour, Jason M. Townsend, Chris McColl, T. Rodd Kelsey

Agriculture-dominated landscapes harbor significantly diminished biodiversity. Woody vegetation along field margins can provide farmers with ecosystem services and benefit biodiversity. However, when crops are damaged by the biodiversity harbored in such vegetation, farmers are reluctant to incorporate field margin habitat onto their land and may…


2020 | Terrestrial | Technology | Science | Publications & Reports

Shrub and vegetation cover predict resource selection use by an endangered species of desert lizard

Christopher J. Lortie, Jenna Braun, Michael Westphal, Taylor Noble, Mario Zuliani, Emmeleia Nix, Nargol Ghazian, Malory Owen, H. Scott Butterfield

This paper evaluates how endangered species with highly restricted habitat needs and increasingly small population sizes (using blunt-nosed leopard lizard as our example), select and use available habitat. The paper paired a novel experimental – telemetry and remotely-sensed data – and analytical – resource selection…


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

Technology Catalyst Fund - 2019 Annual Report

Matt Merrifield, Sue Pollock

Conservation needs to harness technology to meet the complex challenges of today’s world. The Technology Catalyst Fund provides early stage resources to investigate and prototype technologies that have high potential for impact and have effectively disrupted the status quo in other sectors. The Fund empowers…