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.
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 movement patterns of lions, in large part to inform conservation planning. This paper presents genetic data, which combine…
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 suitability using static bioclimatic variables, then examine annual changes in extent at a population-level. The best model indicated the…
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 photo-monitoring stations and vegetation maps to characterize the passive recovery of vegetation that occurred over decades on Santa Cruz Island,…
Eric Hallstein, Matt Miller
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 and blog.
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 conversion has occurred and what land uses have replaced rangelands. The degree to which rangelands were protected…
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 study in applied historical ecology provided by the California Channel Islands, highlighting insights gained from transdisciplinary research…
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 endemic, flagship species in California, to future climate and then validated the results in the field. This suggests…
H. Scott Butterfield, Miriam Tsalyuk, Carrie Schloss
The Nature Conservancy in California monitors residual dry matter (RDM) on approximately 300,000 acres of conservation lands. Researchers evaluated whether satellite remote sensing data could be used to monitor RDM, thereby decreasing costs and increasing the overall effectiveness and long-term sustainability of the monitoring…
Tim Bean, Laura Prugh, Bob Stafford, Scott Butterfield, Mike Westphal, Justin Brashares
In this study, the authors developed a suite of species distribution models (SDMs) for the endangered giant kangaroo rat using the machine-learning method Maxent. They compared these models with three measures of habitat quality: survival, abundance and body condition. Species distribution models were not correlated…
H.R. Sofaer, T.S. Sillett, K.M. Langin, S.A. Morrison, C.K. Ghalambor
The density of birds in their breeding areas can affect reproductive success in myriad ways – and it is often difficult to distinguish which factors are more influential. For example, areas that have a high density of breeders may have lower per capita reproductive output,…
This webmap provides regional climate projections with information about topography, coastal proximity and level of habitat fragmentation to help land managers identify concrete conservation actions they can take now to help address the threat of climate change to the terrestrial species of California.
When should managers intervene if threats from climate change are likely but there is uncertainty about when those threats would actually jeopardize a conservation value? This paper presents a case study that brings that question into sharp focus. Should Island Scrub-Jays be re-introduced to Santa…
S.A. Morrison, K.A. Parker, P.W. Collins, W.C. Funk, T.S. Sillett
Pest eradication as a means to restore island ecosystems may come too late for populations that have already been driven extinct. Over decades, the California islands have been the focus of numerous eradication projects. With most vertebrate invasive species now removed, there is the opportunity…
CL Boser, C Hanna, KR Faulkner, C Cory, JM Randall, SA Morrison
Argentine ants are a highly aggressive and impactful non-native species introduced to California and around the world, impacting ecologically sensitive areas, commercial industries and residential homes. This paper describes a new method of eliminating Argentine ant nests from a conservations area using low concentration toxicant…
TJ Coonan, V Bakker, B Hudgens, CL Boser, DK Garcelon, SA Morrison
The island fox is a rare carnivore existing on only six California Channel Islands. In the late 1990’s, due to new and excessive golden eagle predation, it was threatened with extinction on the three northern islands. After extensive and carefully-managed conservation efforts spearheaded by the Conservancy…
Jeanne M. Robertson, Kathryn M. Langin, T. Scott Sillett, Scott A. Morrison, Cameron K. Ghalambor, W. Chris Funk
Conservation of biodiversity can be complicated when there are many priority taxa and tradeoffs in management need to be made. This can be especially challenging on islands, where populations with relatively low dispersal ability often develop some degree of genetic distinctiveness. Natural communities on islands…
Mario B. Pesendorfer, Kathryn M. Langin, Brian Cohen, Zachary Principe, Scott A. Morrison, T. Scott Sillett
Acorns are an important food resource for many species that occupy oak habitats. Patterns of acorn abundance across time and space, however, are often difficult to characterize. This paper describes observed patterns associated with a dominant and keystone species of oak on Santa Cruz Island,…
CL Boser, C Cory, KR Faulkner, JM Randall, JJ Knapp, SA Morrison
Biosecurity is the prevention of damaging non-native species’ arrival and establishment to new areas, for the protection of native plants and animals. This paper discusses the first iterations of a biosecurity program on Santa Cruz Island, California, wherein wildlife cameras were used to search for…
