Nearly half of California is protected in some land status that prevents most kinds of intensive human land uses.  These lands support extensive natural habitats, and for many species, are a critical stronghold in an increasingly human-dominated world.

Yet, changes in the landscape in and near these places have left many in a degraded and precarious condition. Catastrophic wildfire, invasive species, and climate change threaten vast swathes of the state. Protected lands are becoming increasingly isolated by urban and agricultural development, roads, and other infrastructure. Such obstacles can limit a species’ ability to move to across the landscape and adapt to climate change.

Conservancy scientists are working to enhance the resiliency of protected lands in the face of rapid change, and to maintain the landscape connections necessary for plants and animals to adapt over time. 

Science in Action

Freshwater | Terrestrial | Science

Rewilding the San Joaquin Valley

40 years of science sets the course for the largest recovery of species in U.S. history

Terrestrial | Science

Island Fox

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

2024 | Terrestrial | Planning | Science | Publications & Reports

An approach to designing efficient implementation of 30×30 terrestrial conservation commitments

Carrie A. Schloss, D. Richard Cameron, Bradley Franklin, Christoph Nolte, Scott A. Morrison

In response to biodiversity declines worldwide, over 190 nations committed to protect 30% of their lands and waters by 2030 . As these jurisdictions move from planning to implementation, we propose a…

2024 | Terrestrial | Planning | Science | Publications & Reports

Climatically robust multiscale species distribution models to support pronghorn recovery in California

William T. Bean, H. Scott Butterfield, Jeanette K. Howard, Thomas J. Batter

In this paper, the authors used a variety of habitat suitability modeling approaches to begin to understand where pronghorn may exist in the future in California under different climate change…

2024 | Terrestrial | Marine | Science | Publications & Reports

Spatial Patterns of Vegetation Change in a Fire-Suppressed Coastal California Landscape

Lucy Genua, Brad Anderson, Meghan Bowen, Genelle Ives, Owen Liu, Thomas Paschos, H. Scott Butterfield, Kelly Easterday, Mark Reynolds, James H. Thorne

In this paper, the authors used historical vegetation data, from both aerial photographs and field transects, to assess the change in major vegetation types at the Dangermond Preserve over the last…

2024 | Freshwater | Terrestrial | Science | Publications & Reports

Potential Impacts to Biodiversity from Proposed Lithium Extraction in Nevada and California

Michael J. Clifford, Sophie S. Parker, Laurel Saito, Brian S. Cohen, Naomi S. Fraga

Lithium batteries are important for the clean energy transition in the United States because they are used in electric vehicles and for grid power storage. However, lithium extraction may have impacts…

2024 | Terrestrial | Planning | Science | Publications & Reports

Quantitative methods for integrating climate adaptation strategies into spatial decision support models

Nicholas A. Povak, Patricia N. Manley, Kristen N. Wilson

This study presents a methodology to integrate spatial assessments of current and future forest conditions to understand the potential to achieve desired conditions under climate change with ongoing…

2024 | Freshwater | Terrestrial | Publications & Reports

Potential impacts of proposed lithium extraction on biodiversity and conservation in the contiguous United States

Sophie S. Parker, Michael J. Clifford, Brian S. Cohen

To address climate change, the United States is incentivizing the production of electric vehicles containing domestically derived lithium batteries. Extracting this lithium may have environmental…

2024 | Terrestrial | Science | Publications & Reports

Oren Pollak Memorial Research Fund - 2024 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…

2024 | Freshwater | Terrestrial | Publications & Reports

Expert bioblitz on the Atwood Preserve

Michael Clifford, Sophie Parker, Matt Rader, Lydia Bailey, Naomi Fraga, Chris Hass, Estella Hernandez, Jan Kempf, Lois Merkler, Michael Swink

The Amargosa River supports one of the most outstanding suites of endemic and imperiled species in the world. In 2019, TNC acquired the Atwood Preserve in the river’s headwaters, the…

2023 | Terrestrial | Science | Publications & Reports

Mojave Desert land-use change: revisiting conservation values after a decade of growth and development

Michael J. Clifford, Sophie S. Parker, Brian S. Cohen, Elaine York, Joel Tuhy

This paper provides an assessment of changes in the conservation value of lands in the Mojave Desert of Nevada and Utah resulting from renewable energy and other development between 2010 and 2018. The…

2023 | Terrestrial | Economics | Publications & Reports

Wildfire Resilience Insurance: Quantifying the Risk Reduction of Ecological Forestry with Insurance

The Nature Conservancy with Willis Towers Watson, Sarah Heard

California has the highest wildfire risk in the US, and climate change will continue to exacerbate the risk, at least in the foreseeable future. As a result, California is facing an insurance crisis,…

2023 | Freshwater | Terrestrial | Science | Publications & Reports

Statistical evaluation of the similarity of characteristics in springs of the California Desert, United States

Adam H. Love, Andy Zdon, Naomi S. Fraga, Brian Cohen, Maura Palacios Mejia, Rachel Maxwell, Sophie Parker

This paper presents results from the Mojave Desert Springs research project. The authors present a comprehensive statistical analysis of similarities between California desert springs. An observed…

2023 | Terrestrial | Science | Publications & Reports

Ear mite infection restructures otic microbial networks in conservation–reliant Santa Catalina Island foxes (Urocyon littoralis catalinae)

Jasmine Lu, Emily E. Hamblen, Lara J. Brenner, Julie L. King, Bridgett M. VonHoldt, Alexandra L. DeCandia

Over 50% of federally threatened Santa Catalina Island foxes (Urocyon littoralis catalinae) develop life-threatening ceruminous gland tumors in their ear canals. Previous work suggests that tumors may…

2023 | Terrestrial | Economics | Publications & Reports

Building California’s Forest Resilience Workforce

Sarah Heard, Bradley Franklin

Wildfires in California, and across the western U.S., are increasing in frequency and severity, threatening both ecosystems and communities. Restoration—a combination of ecological thinning and…

2023 | Terrestrial | Science | Publications & Reports

Oren Pollak Memorial Research Fund - 2023 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…

2023 | Freshwater | Terrestrial | Technology | Science | Publications & Reports

Floristic patterns and conservation values of Mojave and Sonoran desert springs in California

Naomi S. Fraga, Brian S. Cohen, Andy Zdon, Maura Palacios Mejia, Sophie S. Parker

This paper presents novel botanical inventories of 48 desert springs as part of the Mojave Springs Research Project. The authors assess plant species composition and richness within and between…

2023 | Terrestrial | Marine | Technology | Science | Publications & Reports

Minimizing conservation impacts of net zero energy systems in the western United States

Grace C. Wu, Ryan A. Jones, Emily Leslie, James H. Williams, Andrew Pascale, Erica Brand, Sophie Parker, Brian Cohen, Joseph Fargione, Julia Souder, Maya Batres, Mary G. Gleason, Michael H. Schindel, Charlotte K. Stanley

This paper presents the results of the Power of Place-West project. The authors combined energy modeling with ecosystem and wildlife habitat data to determine the costs and impacts associated with…

2022 | Terrestrial | Science | Publications & Reports

Assessing the effectiveness of landscape-scale forest adaptation actions to improve resilience under projected climate change

Charles J. Maxwell, Robert M. Scheller, Kristen N. Wilson, Patricia N. Manley

The authors hypothesized that mimicking the historic fire-return interval, by matching it with the combined frequency of natural disturbances (wildfire) and management (i.e., thinning and…

2022 | Terrestrial | Science | Publications & Reports

Interspecific Asymmetries in Behavioral Plasticity Drive Seasonal Patterns of Temporal Niche Partitioning in an Island Carnivore Community

Victor Y. Zhang, Calypso N. Gagorik, Lara J. Brenner, Christina L. Boser, Tad C. Theimer, C. Loren Buck

Despite occupying similar niches in a relatively resource-poor environment, island foxes and island spotted skunks have coexisted for years through fine-scale spatial, temporal, and dietary niche…

2022 | Freshwater | Terrestrial | Technology | Economics | Science | Publications & Reports

Developing an adaptive management approach to cowbird control on the Santa Clara River, California

Sophie S. Parker, Linnea S. Hall, Mary J. Whitfield, Laura Riege, Kathryn R. Selm, René Corado

This paper presents results from a field-based study that can be used to benefit songbirds in riverside habitats like those found along the Santa Clara River in Ventura County, California. Songbirds…