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?

2015 | Terrestrial | Planning | Publications & Reports

Land-use impacts on water resources and protected areas: applications of state-and-transition simulation modeling of future scenarios

Tamara S. Wilson, Jason Sherba, Dick Cameron, Benjamin M Sleeter

Human land use will increasingly contribute to habitat loss and water shortages in California, given future population projections and associated land-use demand. Understanding how land-use change may…

2015 | Terrestrial | Planning | Publications & Reports

Monitoring the Impact of Grazing on Rangeland Conservation Easements Using MODIS Vegetation Indices

Miriam Tsalyuk, Maggi Kelly, Kevin Koy, Wayne M. Getz, H. Scott Butterfield

Monitoring the effects of grazing on rangelands is crucial for ensuring sustainable rangeland ecosystem function and maintaining conservation values. Residual dry matter (RDM), the dry grass…

2015 | Terrestrial | Science | Publications & Reports

Islands within an island: Repeated adaptive divergence in a single population

Langin, K.M., T.S. Sillett , W.C. Funk, S.A. Morrison, M.A. Desrosiers, C.K. Ghalambor

Islands are renowned laboratories for discovery into natural selection. This study looked at “islands” of habitat within a single island and remarkably found that the Island Scrub-Jay…

2015 | Terrestrial | Science | Publications & Reports

Mitochondrial genomes suggest rapid evolution of dwarf California Channel Islands foxes (Urocyon littoralis)

Hofman, C.A., T. C. Rick, M. T. R. Hawkins, W. C. Funk, K. Ralls, C. L. Boser, P. W. Collins, T. J. Coonan, J. L. King, S.A. Morrison, S. D. Newsome, T. S. Sillett, R. C. Fleischer, J. E. Maldonado

Genomics techniques provide powerful means of understanding evolutionary history. This paper examines the evolution of the island fox, which occurs on six of the California Channel Islands. Insights…

2015 | Freshwater | Terrestrial | Marine | Planning | Science | Publications & Reports

Recommendations for improving recovery criteria under the US Endangered Species Act

Doak, D.F., G.K. Himes Boor, V.J. Bakker, W.F. Morris, A. Louthan, S.A. Morrison, A. Stanley, L. Crowder

One of the key components of a recovery plan for a threatened or endangered species in the United States is the set of recovery criteria that will be used to evaluate progress in abating the threats…

2015 | Terrestrial | Maps & Webmaps

Conservation Legacy in Marin County, California

Katie Andrews, Megan Webb, Robin Cox

This interactive webmap takes a multimedia approach to showcase the Conservancy’s conservation legacy in Marin County, California. Eleven achievements are profiled with photographs and…

2015 | Terrestrial | Science | Publications & Reports

Floral visitation by the Argentine ant reduces bee visitation and plant seed set

Cause Hanna, Ida Naughton, Christina Boser, Ruben Alarcón, Keng-Lou, James Hung, David Holway

Floral visitation by ants can compromise plant reproduction in situations where ants interfere with more effective pollinators. This paper documents how Argentine ants on Santa Cruz Island in…

2014 | Freshwater | Terrestrial | Marine | Planning | Science | Publications & Reports

A framework for conservation in a human-dominated world

Scott Morrison

Recognition of the magnitude of human impacts on the planet and the urgent need to increase the pace and scale of conservation has led many conservation organizations to emphasize conservation for…

2014 | Terrestrial | Planning | Publications & Reports

Modeling residential development in California from 2000 to 2050: Integrating wildfire risk, wildland and agricultural encroachment

M.L. Mann, P. Berck, M.A. Moritz, E. Batllori, J.G. Baldwin, C.K. Gately, D.R. Cameron

Between 1940 and 2000, nearly 10 million housing units were constructed in California. This new development led to increased interaction between human and natural communities. Tha authors of this…

2014 | Terrestrial | Publications & Reports

Incorporating critical elements of city distinctiveness into urban biodiversity conservation

Sophie Parker

Strategies for preserving the Earth’s biodiversity that can be employed within cities are likely to become more common as urban areas continue to increase in size and number. Progress towards…

2014 | Terrestrial | Science | Publications & Reports

Fractured genetic connectivity threatens a southern California puma (Puma concolor) population

H.B. Ernest, T.W. Vickers, S.A. Morrison, M.R. Buchalski, W.M. Boyce

Highly fragmented landscapes can pose myriad threats to wide-ranging species like mountain lions. Coastal southern California has long been the focus of research into demographics, genetics, and…

2014 | Terrestrial | Technology | Science | Publications & Reports

A multi-scale distribution model for non-equilibrium populations suggests resource limitation in an endangered rodent

Tim Bean, Bob Stafford, Scott Butterfield, Justin Brashares

This paper presents a multi-step approach to estimate the realized and potential distribution of the endangered giant kangaroo rat. The authors estimate the potential distribution by modeling…

2014 | Terrestrial | Science | Publications & Reports

Passive recovery of vegetation after herbivore eradication on Santa Cruz Island, California

Beltran, R.S., N. Kreidler, D.H. Van Vuren, S.A. Morrison, E.S. Zavaleta, K. Newton, B.R. Tershy, D.A. Croll

Introduced predators and herbivores can have dramatic ecological effects on island ecosystems; their eradication can produce similarly profound ecological responses. This paper analyzes data from…

2014 | Terrestrial | Maps & Webmaps

California Rangeland Conversion webmap

Dick Cameron

This webmap shows regions of California converted from rangeland land use to development, intensive agriculture, or other miscellaneous land uses between 1984 and 2008. See related publication…

2014 | Terrestrial | Planning | Publications & Reports

Whither the Rangeland?: Protection and Conversion of California’s Rangeland Ecosystems

Cameron DR, Marty J, Holland RF

This study assesses the amount of rangeland conversion between 1984 and 2008 in California. The researchers analyzed data from the California Farmland Mapping and Monitoring Program to see where…

2014 | Terrestrial | Science | Publications & Reports

Ecological change on California's Channel Islands from the Pleistocene to the Anthropocene

Rick, T.C, T.S. Sillett, C.K. Ghalambor, C.A. Hofman, K. Ralls, R.S. Anderson, C.L. Boser, T.J. Braje, D.R. Cayan, R.T. Chesser, P.W. Collins, J.M. Erlandson, K.R. Faulkner, R. Fleischer, W.C. Funk, R. Galipeau, A. Huston, J. King, L. Laughrin, J. Maldonado, K. McEachern, D.R. Muhs, S.D. Newsome, L. Reeder-Myers, C. Still, S.A. Morrison

Understanding the deep history of places and resources, and the interplay between natural and cultural histories, can be critical to science-based conservation management. This paper explores the case…

2014 | Terrestrial | Planning | Publications & Reports

Demography linked to climate change projections in an ecoregional case study

B. C. Mclaughlin, C. N. Morozumi, J. MacKenzie, A. Cole, S. Gennet

Anticipating how species will move as the climate changes is a fundamental concern in 21st century conservation. This study modeled potential responses of blue oak (Quercus douglasii), an…