Research Topics
| James A EstesSummaryAffiliation: University of California Country: USA Publications
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Detail Information
Publications
Trophic downgrading of planet EarthJames A Estes
Department of Ecology and Evolutionary Biology, University of California, Santa Cruz, CA 95060, USA
Science 333:301-6. 2011..These findings emphasize the urgent need for interdisciplinary research to forecast the effects of trophic downgrading on process, function, and resilience in global ecosystems...
Using ecological function to develop recovery criteria for depleted species: sea otters and kelp forests in the Aleutian archipelagoJames A Estes
Department of Ecology and Evolutionary Biology, Center for Ocean Health, Long Marine Laboratory, University of California, Santa Cruz, CA 95060, USA
Conserv Biol 24:852-60. 2010....
Causes and consequences of marine mammal population declines in southwest Alaska: a food-web perspectiveJ A Estes
Department of Ecology and Evolutionary Biology, University of California, Santa Cruz, CA 95060, USA
Philos Trans R Soc Lond B Biol Sci 364:1647-58. 2009..Our results indicate that while such a system is possible, it could only exist under a narrow range of extreme conditions and is therefore highly unlikely...
Structure and mechanism of diet specialisation: testing models of individual variation in resource use with sea ottersM Tim Tinker
U S Geological Survey, Western Ecological Research Center, Long Marine Lab, 100 Shaffer Rd, Santa Cruz, CA 95060, USA
Ecol Lett 15:475-83. 2012..Our findings support a hierarchical organisation of diet specialisation and suggest individual use of core and marginal resources may be driven by different selective pressures...
Food limitation leads to behavioral diversification and dietary specialization in sea ottersM Tim Tinker
Department of Ecology and Evolutionary Biology, University of California, Center for Ocean Health, 100 Shaffer Road, Santa Cruz, CA 95060, USA
Proc Natl Acad Sci U S A 105:560-5. 2008..Individuality in foraging behavior adds complexity to both the fitness consequences of prey selection and food web dynamics, and it may figure prominently as a diversifying process over evolutionary timescales...
Using demography and movement behavior to predict range expansion of the southern sea otterM Tim Tinker
U S Geological Survey, Western Ecological Research Center, Long Marine Laboratory, 100 Shaffer Road, Santa Cruz, California 95060, USA
Ecol Appl 18:1781-94. 2008..Our approach provides guidance for the acquisition of further data and a means of forecasting the consequence of specific management actions. Similar methods could aid in the management of other recovering populations...
Prey choice and habitat use drive sea otter pathogen exposure in a resource-limited coastal systemChristine K Johnson
Wildlife Health Center, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
Proc Natl Acad Sci U S A 106:2242-7. 2009..High levels of infection with protozoal pathogens may be an adverse consequence of dietary specialization in this threatened species, with both depleted resources and disease working synergistically to limit recovery...
Ontogenetic and among-individual variation in foraging strategies of northeast Pacific white sharks based on stable isotope analysisSora L Kim
Department of Earth and Planetary Sciences, University of California Santa Cruz, Santa Cruz, California, USA
PLoS ONE 7:e45068. 2012..Our data reveal substantial ontogenetic and individual dietary variation within a white shark population...
Predicting community responses to perturbations in the face of imperfect knowledge and network complexityMark Novak
Department of Ecology and Evolutionary Biology, Long Marine Laboratory, University of California, Santa Cruz, California 95064, USA
Ecology 92:836-46. 2011..Our simulations provide guidance in dealing with the trade-offs involved in maximizing the utility of network approaches for predicting dynamics in multispecies communities...
Organochlorine contaminants in fishes from coastal waters west of Amukta Pass, Aleutian Islands, Alaska, USAA Keith Miles
U S Geological Survey, Western Ecological Research Center, Davis Field Station, 1 Shields Avenue, University of California, Davis, California 95616, USA
Environ Toxicol Chem 28:1643-54. 2009..Concentrations in all organochlorine groups increased with delta15N enrichment in fishes, and analyses of residual variation provided further evidence of different sources of SigmaPCBs and p,p'DDE among species and locations...
Incorporating diverse data and realistic complexity into demographic estimation procedures for sea ottersM Tim Tinker
Department of Ecology and Evolutionary Biology, University of California, Center for Ocean Health, 100 Shaffer Road, Santa Cruz 95060, USA
Ecol Appl 16:2293-312. 2006..More broadly, we have illustrated how the powerful and relatively straightforward tools of information-theoretic-based model fitting can be used to sort through and parameterize quite complex demographic modeling frameworks...
Introduced predators transform subarctic islands from grassland to tundraD A Croll
Department of Ecology and Evolutionary Biology, Island Conservation, University of California Santa Cruz, Santa Cruz, CA 95060, USA
Science 307:1959-61. 2005..By preying on seabirds, foxes reduced nutrient transport from ocean to land, affecting soil fertility and transforming grasslands to dwarf shrub/forb-dominated ecosystems...
Indirect food web interactions: sea otters and kelp forest fishes in the Aleutian archipelagoShauna E Reisewitz
Institute of Marine Sciences, Long Marine Laboratory, 100 Shaffer Road, Santa Cruz, CA 95060, USA
Oecologia 146:623-31. 2006....
Organochlorine contaminants in coastal marine ecosystems of southern Alaska: inferences from spatial patterns in blue mussels (Mytilus trossulus)Stacey L Reese
Long Marine Lab, University of California, Santa Cruz, 100 Shaffer Road, Santa Cruz, CA 95060, USA
Chemosphere 88:873-80. 2012..Our findings do not implicate persistent organochlorines as a significant factor in the recent pinniped and sea otter population declines across southwest Alaska...
Patterns of growth and body condition in sea otters from the Aleutian archipelago before and after the recent population declineK L Laidre
Department of Ecology and Evolutionary Biology, Long Marine Laboratory, University of California, Santa Cruz, CA 95060, USA
J Anim Ecol 75:978-89. 2006..Our findings are consistent with the hypothesis that the decline was caused by increased killer whale predation...
Historical overfishing and the recent collapse of coastal ecosystemsJ B Jackson
Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92093 0244, USA
Science 293:629-37. 2001....
