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?

2016 | Terrestrial | Science | Publications & Reports

An irruption interrupted: eradication of wild turkeys from Santa Cruz Island, California

Morrison, S.A., A.J. DeNicola, K. Walker, D. Dewey, L. Laughrin, R. Wolstenholme, N. Macdonald

This paper describes a program to eradicate an introduced and rapidly increasing population of wild turkeys from an island. It includes a description of the principles important for eradication…

2016 | Terrestrial | Planning | Publications & Reports

Climate Action Through Conservation Project

The Nature Conservancy and Sonoma County Agricultural Preservation and Open Space District

The Climate Action Through Conservation project provides a way for local governments, land managers, and planners to understand the links between climate benefits and conservation values and…

2016 | Terrestrial | Science | Publications & Reports

Evidence for genetic pollution of a California native tree, Platanus racemosa, via recent, ongoing introgressive hybridization with an introduced ornamental species

Matthew G. Johnson, Kylene Lang, Paul Manos, Greg H. Golet, Kristina A. Schierenbeck

When non-native ornamental species spread into wild landscapes they can displace natives that have greater wildlife habitat value. Controlling the spread of a non-native species can be difficult when…

2016 | Terrestrial | Science | Publications & Reports

Response of medium- and large-sized terrestrial fauna to corridor restoration along the middle Sacramento River

Vasilissa V. Derugin, Joseph G. Silveira, Gregory H. Golet, Gretchen LeBuhn

In restoration ecology, understanding how and when species colonize newly created habitat is critically important for assessing progress toward restoration goals. By using camera traps to take a…

2016 | Terrestrial | Science | Publications & Reports

Historic and Recent Winter Sandhill Crane Distribution in California

Gary L. Ivey, Caroline P. Herziger, David A. Hardt, Gregory H. Golet

Understanding the geographic distribution and long-term dynamics of Sandhill Crane (Grus canadensis) foraging areas and night roost sites is fundamental to their conservation and management. The…

2015 | Terrestrial | Publications & Reports

The Unintended Ecological and Social Impacts of Food Safety Regulations in California's Central Coast Region

Daniel S. Karp, Patrick Baur, Edward R. Atwill, Kathryn De Master, Sasha Gennet, Alastair Iles, Joanna L. Nelson, Amber R. Sciligo, Claire Kremen

In 2006, an E. coli outbreak linked to spinach grown in California’s Central Coast region catalyzed reforms in vegetable production. Without evidence, wildlife was targeted as a disease vector…

2015 | Terrestrial | Planning | Publications & Reports

Conservation Planning for Offsetting the Impacts of Development: A Case Study of Biodiversity and Renewable Energy in the Mojave Desert

Jason Kreitler, Carrie A. Schloss, Oliver Soong, Lee Hannah, Frank W. Davis

In the past, mitigation to address impacts from development have lacked a regional planning perspective resulting in efficient design across a set of sites for a suite of impacts. This paper…

2015 | Freshwater | Terrestrial | Publications & Reports

The benefits of crops and field management practices to wintering waterbirds in the Sacramento-San Joaquin River Delta of California

W. David Shuford , Matthew E. Reiter, Khara M. Strum, Michelle M. Gilbert , Catherine M. Hickey, Greg Golet

Although agricultural intensification is one of the largest contributors to the loss of global biodiversity, agricultural landscapes can provide valuable habitat for birds. Recognizing this, wildlife…

2015 | Freshwater | Terrestrial | Technology | Publications & Reports

Abundance models improve spatial and temporal prioritization of conservation resources

Johnston, A., D. Fink, M. D. Reynolds, W. M. Hochachka, B. L. Sullivan, N. E. Bruns, E. Hallstein, M. S. Merrifield, S. Matsumoto, S. Kelling

Global declines in migratory species in response to accelerating habitat destruction and climate change challenge the scope and scale of conservation efforts. The ability to pinpoint where and when…

2015 | Terrestrial | Science | Publications & Reports

Testing the effects of ant invasions on non-ant arthropods with high-resolution taxonomic data

Cause Hanna, Ida Naughton, Christina Boser, David Holway

Ecological invasions can shift species composition and even alter ecosystem function. Ant invasions generate a broad spectrum of ecological effects but there is controversy about the extent of these…

2015 | Terrestrial | Publications & Reports

Comanaging fresh produce for nature conservation and food safety

Daniel S. Karp, Sasha Gennet , Christopher Kilonzo, Melissa Partyka, Nicolas Chaumont, Edward R. Atwill, Claire Kremen

In 2006, a high profile outbreak of E. coli in spinach was traced to California’s Central Coast. After that outbreak, produce growers were pressured to minimize potential presence of wild…

2015 | Terrestrial | Publications & Reports

Carbon Implications of Fuel Reduction and Ecological Restoration Treatments in Sierra Nevada Forests

Derek Young

A century of fire suppression has dramatically altered the structure and composition of western U.S. forests. When dense, fire-suppressed forests experience wildfire, they often burn severely. To…

2015 | Terrestrial | Science | Publications & Reports

Survival and mortality of pumas (Puma concolor) in a fragmented, urbanizing landscape

Vickers, T.W., J. N. Sanchez, C. Johnson, S.A. Morrison, R. Botta, T. Smith, B.S. Cohen, P. Huber, W.M. Boyce

Conservation of wide-ranging species like mountain lions is especially difficult in highly fragmented landscapes, such as coastal southern California. Research into their populations can provide…

2015 | Terrestrial | Publications & Reports

High Time for Conservation: Adding the Environment to the Debate on Marijuana Liberalization

Jennifer K. Carah, Jeanette K. Howard, Sally E. Thompson, Anne G. Short Gianotti, Scott D. Bauer, Stephanie M. Carlson, David N. Dralle, Mourad W. Gabriel, Lisa L. Hulette, Brian J. Johnson, Curtis A. Knight, Sarah J. Kupferberg, Stefanie L. Martin, Rosamond L. Naylor, Mary E. Power

Marijuana cultivation can have significant negative collateral effects on the environment that are often unknown or overlooked. This study focuses on California, where by some estimates, 60–70%…

2015 | Terrestrial | Planning | Science | Publications & Reports

Integrating Land Conservation and Renewable Energy Goals in California: A Study of Costs and Impacts Using the Optimal Renewable Energy Build-Out (ORB) Model

The Nature Conservancy: Erica Brand, Laura Crane, Dick Cameron, Energy and Environmental Economics: Grace C. Wu, Nick Schlag

Integrating ecological data into long-term energy planning is critical to meet both California’s long term energy and conservation goals. This report assesses the potential trade-offs associated…

2015 | Terrestrial | Planning | Publications & Reports

Case studies of conservation plans that incorporate geodiversity

M.G. Anderson, P.J. Comer, P. Beier, J.J. Lawler, C.A. Schloss, S. Buttrick, C. M. Albano, D. P. Faith

Incorporating geodiversity into conservation plans to ensure conservation actions are more resilient to climate change is appealing because it addresses the threat of climate change while avoiding the…

2015 | Terrestrial | Planning | Publications & Reports

Incorporating geodiversity into conservation decisions

Patrick J. Comer, Robert L. Pressey, Malcolm L. Hunter Jr., Carrie A. Schloss, Steven C. Buttrick, Nicole E. Heller, John M. Tirpak, Daniel P. Faith, Molly S. Cross, Mark L. Shaffer

The protection of biodiversity in a changing climate is a key challenge for conservation planners. Conserving a diversity of geophysical settings makes species and systems more resilient to climate…