Almost half of the world’s human population lives in coastal areas, and associated coastal development has significantly degraded or destroyed many coastal ecosystems. Burgeoning human populations and rising sea levels only further constrain the availability of habitat that coastal species depend on.

California’s 1,100 mile coast has more than 200 threatened, endangered or rare species living in coastal habitats. There are hundreds of coastal estuaries that provide critical rearing habitat for marine species, and are also important for recreation, water filtration, and carbon sequestration.

Only 10 percent of California’s historic coastal wetlands remain. Without intervention, we are at risk of losing 40 percent of our remaining coastal wetlands to sea level rise over the coming decades. Conservancy scientists are working to reverse these trends. 

Freshwater Systems

California is one of the most hydrologically altered landscapes in the world. As water becomes…>>

Groundwater

In a normal year, groundwater accounts for 40 percent of California’s water supply. That…>>

Surface Flows

Californians have fundamentally altered many of the state’s rivers and streams with dams,…>>

Terrestrial Systems

In California, a day’s drive can take a visitor from record-setting desert heat to glaciated…>>

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,…>>

Fisheries

Wild capture fisheries supply food and jobs for hundreds of millions of people across the globe. Yet…>>

Coastal Conservation

Almost half of the world’s human population lives in coastal areas, and associated coastal…>>

Science in Action

Terrestrial | Planning | Technology | Economics

Wildfire and Communities

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

Terrestrial | Marine | Economics | Science

TNC and FEMA

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

2010 | Terrestrial | Science | Publications & Reports

Interfacing models of wildlife habitat and human development to predict the future distribution of puma habitat

CL Burdett, KR Crooks, DM Theobald, KR Wilson, EE Boydston, LM Lyren, RN Fisher, TW Vickers, SA Morrison, WM Boyce

Long-term studies of animal movement can generate data that allow for robust modeling of habitat use by the species. This study characterizes and maps the distribution of habitat for mountain lions in…

2010 | Freshwater | Terrestrial | Marine | Planning | Science | Publications & Reports

Convergent Conservation

S.A. Morrison

Conservationists around the world work in systems and on problems that often have clear analogues to the efforts of others. This essay highlights the importance of collaborating and sharing lessons…

2010 | Freshwater | Publications & Reports

Mapping Groundwater Dependent Ecosystems in California

Jeanette Howard, Matt Merrifield

In 2014 the California legislature passed a three-bill package (SB 1168, AB 1739, and SB 1319) of groundwater reform legislation that was the most significant update of California water policy in…

2010 | Terrestrial | Planning | Publications & Reports

Tehachapi Conservation Action Plan

Reed Tollefson, Alison Sheehey, Brian Cohen, Sophie Parker, E.J. Remson, Zach Principe, Tom Maloney, Michael White

This Conservation Action Plan identifies targets, threats, and actions to achieve conservation success in the face of climate change in the Tehachapi Mountains. The Tehachapis lie at the convergence…

2010 | Terrestrial | Science | Publications & Reports

Rapid eradication of feral pigs (Sus scrofa) from Santa Cruz Island, California

John P. Parkes, David S.L.Ramsey, Norman Macdonald, Kelvin Walker, Sean McKnight, Brian S.Cohen, Scott A. Morrison

This paper describes the approach, planning, and field implementation of an intensive effort to eradicate a population of feral pigs from an island. Key elements of the project included comprehensive…

2010 | Marine | Planning | Publications & Reports

Science-based and stakeholder-driven marine protected area network planning: A successful case study from north central California

Mary Gleason, Scott McCreary, Melissa Miller-Henson, John Ugoretz, Evan Fox, Matt Merrifield, Will McClintock, Paulo Serpa, Kathryn Hoffman

This paper describes the planning process for California's Marine Life Protection Act (MLPA) in north central California. The process represents a case study in the design of a regional component…

2009 | Freshwater | Planning | Publications & Reports

California’s Freshwater Biodiversity in a Continental Context

Howard, J, C. Revenga

Worldwide, freshwater species and habitats are, on average, more imperiled than their terrestrial or marine counterparts. Despite concerns over the health of the world’s freshwater species and…

2009 | Marine | Publications & Reports

Are we missing the boat? Collaborative solutions for North American fish wars

Mary Gleason, Chuck Cook, Michael Bell, Erika Feller

This editorial highlights the polarization and lack of innovation in U.S. fisheries management, using the West Coast groundfish fishery as an example. The authores focus on the need for new…

2009 | Terrestrial | Science | Publications & Reports

Fire on Guadalupe Island reveals some old wounds – and new opportunity

Oberbauer, T., L. Luna Mendoza, N. Citlali Oliveres, L. Barbosa Deveze, I. Granillo Duarten, S.A. Morrison

Guadalupe Island in Mexico is undergoing a dramatic ecological recovery following the eradication of feral goats. Unfortunately, that eradication came too late for some species and ecosystems, and…

2009 | Terrestrial | Science | Publications & Reports

Reproductive consequences of an extreme drought for orange-crowned warblers on Santa Catalina and Santa Cruz Islands

Kathryn M. Langin, T. Scott Sillett, Jongmin Yoon, Helen R. Sofaer, Scott A. Morrison, Cameron K. Ghalambor

Island archipelagos can provide useful opportunities for comparative studies in ecology. For example, breeding ecology of a songbird was studied on two of the California Channel Islands, which share…

2009 | Terrestrial | Planning | Publications & Reports

Threats and biodiversity in the mediterranean biome

E.C. Underwood, J.H. Viers, K.R. Klausmeyer, R.L. Cox, M. R. Shaw

The mediterranean biome is one of the rarest terrestrial ecosystem types on Earth, restricted to only 2% of the world’s land surface. Encompassing portions of southern Australia, central Chile,…

2009 | Terrestrial | Science | Publications & Reports

Incorporating ecological drivers and uncertainty into a demographic population viability analysis for the island fox

Victoria J. Bakker, Daniel F. Doak, Gary W. Roemer, David K. Garcelon, Timothy J. Coonan, Scott A. Morrison, Colleen Lynch, Katherine Ralls, Rebecca Shaw

Population models can be a critical tool in managing recovery of endangered species. This paper presents an analysis that became the foundation of recovery planning and tracking for the endangered…

2009 | Terrestrial | Planning | Publications & Reports

Modeling multiple ecosystem services, biodiversity conservation, commodity production, and tradeoffs at landscape scales

Erik Nelson, Guillermo Mendoza, James Regetz, Stephen Polasky, Heather Tallis, D. Richard Cameron, Kai MA Chan, Gretchen C. Daily, Joshua Goldstein, Peter M. Kareiva, Eric Lonsdorf, Robin Naidoo, Taylor H. Ricketts, M. Rebecca Shaw

Humans benefit from the goods and services provided by natural ecosystems like water filtration, carbon storage, and recreational opportunities to name a few. Assigning economic value to these…

2009 | Terrestrial | Planning | Publications & Reports

Expanding the global network of protected areas to save the imperiled mediterranean biome

Underwood, E.C., K.R. Klausmeyer, R.L. Cox, S.M. Busby, S.A. Morrison, M.R.Shaw

Mediterranean habitats are among the rarest on Earth. Characterized by warm dry summers and cool wet winters, they are restricted to only 2% of the Earth’s land surface–portions of…

2008 | Terrestrial | Science | Publications & Reports

Quantifying eradication success: the removal of feral pigs from Santa Cruz Island, California

DSL Ramsey, J Parkes, SA Morrison

Populations at very low abundance can be very difficult to detect. Consequently, one of the biggest challenges of eradication projects is determining whether an inability to detect the species at the…

2008 | Terrestrial | Planning | Publications & Reports

Conserving connectivity: some lessons from mountain lions in southern California

Scott Morrison, Walter Boyce

Critical for biodiversity conservation is the retention of ecological connectivity in the landscape, so that wildlife—and the natural processes that sustain wildlife—can move around.…

2008 | Terrestrial | Technology | Science | Publications & Reports

One size does not fit all: the use of cattle grazing for grassland management at Carrizo Plain National Monument

Caroline Christian , Lawrence Saslaw, H. Scott Butterfield

To better understand the ecological role of cattle grazing in managing Carrizo Plain National Monument, we initiated a long-term study in 1997 designed to evaluate the effects of cattle grazing on…

2008 | Freshwater | Terrestrial | Science | Publications & Reports

Wildlife Response to Restoration on the Sacramento River

Golet G.H., T. Gardali, C. Howell, J. Hunt, R. Luster, B. Rainey, M. Roberts, H. Swagerty, N. Williams

Studies that assess the success of riparian restoration projects seldom focus on wildlife. More often, vegetation is studied, with the assumption that animal populations will recover once adequate…

2008 | Marine | Planning | Science | Publications & Reports

Establishing Resilient Marine Protected Area Networks–Making it Happen

Dan Laffoley, Alan T. White, Stacey Kilarski, Mary Gleason, Scott Smith, Ghislaine Llewellyn , Jon Day , Annie Hillary, Victoria Wedell, Daphine Pee

With government, agency and organizational partners, Conservancy scientists helped publish an IUCN guidebook to inspire conservation investment in global marine protection and provide a case study…

2007 | Terrestrial | Science | Publications & Reports

Reducing risk and enhancing efficiency in non-native vertebrate removal efforts on islands: a 25 year multi-taxa retrospective from Santa Cruz Island, CA

Scott A. Morrison

Eradication of invasive non-native species is often necessary to protect island ecosystems. Eradication efforts can nonetheless be risky investments. How they are planned and implemented can greatly…