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…>>

Harvested Landscapes

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

Cultivated Landscapes

California is the leading agricultural state in the country and it’s agriculture generates…>>

Urban Areas and Infrastructure

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

Science in Action

Terrestrial | Planning | Technology

Wildfire and Communities

How can land protection and restoration help protect communities from wildfire?

Terrestrial | Marine | Science

TNC and FEMA

How do we increase climate resilience in ways that work for people and nature?

2018 | Freshwater | Terrestrial | Planning | Science | Publications & Reports

Ecological Values of the Amargosa River in California

Sophie S. Parker, Jim Moore, Leonard Warren

The 185 mile-long Amargosa River, one of only two rivers with perennial flow in the California portion of the Mojave Desert, is fed by an ancient groundwater aquifer. The river provides habitat for…

2018 | Terrestrial | Planning | Science | Science in Action

Connectivity Roadmap: Can we identify areas where nature will need to migrate in response to climate change?

Dick Cameron, Carrie Schloss

The Conservancy’s Omniscape tool provides a connectivity roadmap for plants and animals that need to adapt as the climate warms.


2018 | Freshwater | Terrestrial | Marine | Planning | Science | Publications & Reports

Improving multi-objective ecological flow management with flexible priorities and turn-taking: a case study from the Sacramento River and Sacramento-San Joaquin Delta

Alexander C.A.D., F. Poulsen, D.C.E. Robinson, B.O. Ma , R.A. Luster

Management of the Sacramento River and Sacramento–San Joaquin Delta is one of California’s greatest challenges, requiring trade-offs between valued components that serve a multiplicity of…

2018 | Terrestrial | Planning | Science | Publications & Reports

Assessment of Wildlife Crossing Sites for the Interstate 15 and Highway 101 Freeways in Southern California

Seth P. D. Riley, Trish Smith, T. Winston Vickers

Freeways are barriers to wildlife passage and gene exchange. In Southern California, mountain lion movement has been severely restricted due to this infrastructure. As a result, the mountain…

2018 | Freshwater | Terrestrial | Planning | Science | Publications & Reports

Harnessing cross-border resources to confront climate change

Aburto-Oropeza, O., M. Edwards, S. Butterfield, and 93 additional authors

The U.S. and Mexico face many shared ecological changes due to the increased frequency and severity of droughts and rising energy demands; trends that entail economic costs for both nations and…

2018 | Terrestrial | Planning | Science | Publications & Reports

Adapting the bioblitz to meet conservation needs

Parker, S.S., B.V. Brown, B.S. Cohen, N.S. Fraga, J.J. Knapp, Z. Principe, J. Moore, G.B. Pauly, J.M. Randall, T.A. Wake

A bioblitz is a collaborative, rapid field assessment that takes place in a given location over a short period of time. This paper discusses how bioblitz events involving experts are being used to…

2018 | Freshwater | Terrestrial | Science | Publications & Reports

Using ricelands to provide temporary shorebird habitat during migration

Gregory H. Golet, Candace Low, Simon Avery, Katie Andrews, Christopher J. McColl, Rheyna Laney, Mark D. Reynolds

Migratory birds face great challenges due to the climate change, conversion of historical stopover sites, and other factors. To help address these challenges, the Conservancy launched a dynamic…

2018 | Terrestrial | Science | Publications & Reports

Introduction to the Special Issue on the Flora and Vegetation of the Islands of the Californias

John J. Knapp, John M. Randall

The islands off the Pacific coast of California and Baja California, from the Farallones in the north to Isla Natividad in the south, are within the California Floristic Province. Their shared flora…

2017 | Freshwater | Terrestrial | Planning | Publications & Reports

Identification of potentially suitable habitat for strategic land retirement and restoration in the San Joaquin Desert

H. Scott Butterfield, Rodd Kelsey, Abigail Hart, Tanushree Biswas, Mark Kramer, Dick Cameron, Laura Crane, Erica Brand

California's Sustainable Groundwater Management Act (SGMA) established a framework for sustainable, local groundwater management. SGMA requires groundwater-dependent regions to…

2017 | Terrestrial | Science | Publications & Reports

Amargosa River Expert BioBlitz 2017 Final Report

Parker, S.S., B.S. Cohen, N. Fraga, B. Brown, J. Cole, W. Chatfield-Taylor, K. Guadalupe, G.B. Pauly, D. Cooper, M. Ordeñana

In 2017, The Nature Conservancy co-organized an “Expert BioBlitz” to explore a 26-mile stretch of the Wild and Scenic Amargosa River, located in the heart of the Mojave Desert. The event…

2017 | Freshwater | Terrestrial | Planning | Publications & Reports

Rethinking the Grid: Optimizing California’s Transmission System For Renewable Energy

Energy+Environmental Economics for The Nature Conservancy, Arne Olson, Doug Allen, Vivian Li, Emily Leslie

California leads the nation in the transition to a clean energy economy. However, current transmission planning processes limit development of new renewable resources. This report (slide deck),…

2017 | Freshwater | Terrestrial | Marine | Science | Publications & Reports

Conservation Science Catalyst Fund - 2017 Annual Report

Brynn Pewtherer, Scott Morrison

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…

2017 | Terrestrial | Science | Publications & Reports

Ecosystem management and land conservation can substantially contribute to California’s climate mitigation goals

D. Richard Cameron, David C. Marvin, Jonathan M. Remucal, Michelle C. Passero

Combatting climate change will require using all available tools, especially those that contribute to other societal and economic goals, such as natural resource protection and energy security.…

2017 | Terrestrial | Planning | Publications & Reports

Regional Prioritization for Forest Restoration across California's Sierra Nevada

Rodd Kelsey, Edward Smith, Tanushree Biswas, Chris McColl, Kristen Wilson, Dick Cameron

This report provides a systematic regional-scale assessment of biodiversity, fire regime change, and fire risk to infrastructure of forested watersheds across the Sierra Nevada and prioritizes…

2017 | Terrestrial | Technology | Science | Publications & Reports

Testing a Remote Sensing-Based Interactive System for Monitoring Grazed Conservation Lands

Lawrence D. Ford, H. Scott Butterfield, Pete A. Van Hoorn, Kasey B. Allen, Ethan Inlander, Carrie Schloss, Falk Schuetzenmeister, Miriam Tsalyuk

The Nature Conservancy developed RDMapper, a web-based tool that uses satellite-based productivity estimates, rainfall records, and compliance history to identify easement properties at risk of being…

2017 | Terrestrial | Technology | Science | Publications & Reports

Novel fine-scale aerial mapping approach quantifies grassland weed cover dynamics and response to management

Carolyn M. Malmstrom, H. Scott Butterfield, Laura Planck, Christopher W. Long, Valerie T. Eviner

Invasive weeds threaten the biodiversity and forage productivity of grasslands worldwide. However, management of these weeds is constrained by the practical difficulty of detecting small-scale…