We identify issues and uncertainties that pose obstacles to conservation and then—in collaboration with internal and external colleagues—develop science products that help overcome those obstacles.
Kristen Wilson, Dale W. Johnson, Douglas F. Ryan, ed.
Authored by TNC staff and colleague, Chapter 8 of this report synthesizes environmental monitoring and studies performed at Sagehen Experimental Forest that are relevant to water quality regulatory agencies. Water quality in the basin is mainly controlled by groundwater emerging in springs, but wildland fires,…
Environmental Science Associates (ESA) for The Nature Conservancy and Naval Base Ventura County
Charlotte Stanley, Alyssa Mann, Walter Heady
The United States operates thousands of military installations in the U.S. and worldwide, worth about $1.2 trillion. These facilities are where personnel train and test weaponry, with the specific aim of ensuring the nation’s security. With climate change, coastal installations are now being impacted by rising sea levels, erosion and…
Walter Heady, Alyssa Mann, Stacey Solie, Bob Battalio, James Jackson, Kendall Lousen, and Bob Barnes
The U.S. Congress and the Department of Defense (DoD) have determined that climate change is a threat to national security and have required military installations to develop plans to improve the climate resilience of both military installations and key supporting civilian infrastructure. This report, co-authored…
Alyssa Mann, Walter Heady, Charlotte Stanley
TNC and the United States Navy partnered together to prepare for the impacts of climate change on Naval Base Ventura County (NBVC), Point Mugu in California. NBVC is a critical and strategic asset of the U.S. Navy. It is also home to Mugu Lagoon, the…
Alyssa Mann, Walter Heady, Charlotte Stanley
Christopher Dillis, Van Butsic, Jennifer Carah, Samuel Zipper, Theodore Grantham
Water management practices for cannabis farming in California are not well understood. This study examined permit reporting data and found that the vast majority (>75%) of permitted cannabis farms use groundwater wells to source water, with many wells located outside regulated groundwater basins. Groundwater pumping…
Elizabeth S. Forbes, Peter S. Alagona, Andrea J. Adams, Sarah E. Anderson, Kevin C.Brown, Jolie Colby, Scott D. Cooper, Sean M. Denny, Elizabeth H.T. Hiroyasu, Robert Heilmayr, Bruce E. Kendall, Jennifer A. Martin, Molly Hardesty-Moore, Alexis M. Mychajliw, Brian P. Tyrrell, Zoë S.Welch
Species reintroductions in a changing world are difficult and highly uncertain. This paper introduces a framework to assess habitat suitability using historic, geographic, and taxonomic analogies to triangulate places best suited for reintroduction using the California Grizzly as a case study.
Christopher Dillis, Eric Biber, Hekia Bodwitch, Van Butsic, Jennifer Carah, Phoebe Parker-Shames, Michael Polson, and Theodore Grantham
This study used permitting and GIS data to explore geographic characteristics of legal cannabis farms in California. The study found two divergent paths of development - one characterized by numerous, smaller farms in rugged, tree-covered landscapes in historical cannabis producing regions (Humboldt, Mendocino, Trinity counties),…
Robert I. McDonald, Tanushree Biswas, Cedilla Sachar, Ian Housman, Timothy M. Boucher, Deborah Balk, David Nowak, Erica Spotswood, Charlotte K. Stanley, Stefan Leyk
Urban tree cover provides benefits to human health and well-being, but it is often inequitably distributed. In this study, researchers Google Earth Engine (GEE) and an automated machine learning algorithm to map urban tree cover at 2m resolution across 5,723 municipalities and unincorporated communities in the…
Alyssa E. Semerdjian, H. Scott Butterfield, Robert Stafford, Michael F. Westphal, William T. Bean
This paper in the Journal of Wildlife Management combines nearly 20 years of remote sensing, field/trapping, and modeling data to develop a new approach to the identification and prioritization of conservation land for the giant kangaroo rat. As a keystone species in the San Joaquin…
Kirk Klausmeyer, Jeanette Howard, Melissa Rohde, Charlotte Stanley
The first step to sustainably manage groundwater dependent ecosystems (GDEs) is to identify where they are. The Nature Conservancy developed a statewide spatial database that provides locations of seeps and springs, wetlands, and vegetation likely to depend on groundwater. This database (version 2.0) is an…
Christopher J. Lortie, Alessandro Filazzola, Charlotte Brown, Jacob Lucero, Mario Zuliani, Nargol Ghazian, Stephanie Haas, Malory Owen, H. Scott Butterfield, Emmeleia Nix, Michael Westphal
There are many pressures that influence the ecological capacity and health of drylands around the world. Shrubs are often a critical component of these systems and can function positively as foundation species through facilitation of other species. But, shrubs can also have negative and indirect effects…
H. Scott Butterfield, T. Rodd Kelsey, and Abigail K. Hart, Editors
As the world population grows, so does the demand for food, putting unprecedented pressure on agricultural lands. At the same time, climate change, soil degradation, and water scarcity mean that productivity of many of these lands is deteriorating. In many desert dryland regions, drinking wells…
Tom Baribault, Daniel Porter, Jessica Burton Desrocher, Douglas Larmour, Mark Rasmussen, Roy Anderson
The Tahoe-Central Sierra Initiative (TCSI) area has seen recent megafires and is highly developed, making the risk new of human-caused wildfire ignitions high. In this report, experts from Mason Bruce & Girard, The Beck Group and The Nature Conservancy assess quantities of…
Daniel Porter, Robert Longcor
Forests of the Sierra Nevada and across the western U.S. are under unprecedented threat from catastrophic wildfire, insect outbreaks, and drought. In this briefing paper, which was developed as a collaboration between Bain and Company and The Nature Conservancy, we assess the challenges and…
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 grassland ecology students. As The Nature Conservancy’s lead ecologist in California in the…
Sydney J. Chamberlin, Michelle Passero, Ashley Conrad-Saydah, Tanushree Biswas, Charlotte K. Stanley
California’s natural and working lands – its forests, grasslands, wetlands, farmlands, rangeland, and urban green spaces – provide Californians with numerous environmental, social, and economic benefits, including greenhouse gas reductions (e.g., carbon sequestration). However, extreme heat events, droughts, floods, wildfires, development, and other anthropogenic impacts…
Sophie S. Parker, Andy Zdon, William T. Christian, Brian S. Cohen, Maura Palacios Mejia, Naomi S. Fraga, Emily E. Curd, Kiumars Edalati, Mark A. Renshaw
This paper presents results from the Mojave Desert Springs research project, and discusses why the conservation of these groundwater-dependent ecosystems is so critical to biodiversity. The authors present results of a comprehensive survey of Mojave Desert springs including hydrological and ecological observations, and an…
