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Spring migration of Northern Pintails from California's Central Valley wintering area tracked with satellite telemetry: routes, timing, and destinations
We used satellite transmitters to track the 2000–2003 spring migrations of adult female Northern Pintails (Anas acuta L., 1758) from California's Central Valley, USA. PTT-tagged Pintails departedExpand
Wetland Accretion Rate Model of Ecosystem Resilience (WARMER) and Its Application to Habitat Sustainability for Endangered Species in the San Francisco Estuary
Salt marsh faunas are constrained by specific habitat requirements for marsh elevation relative to sea level and tidal range. As sea level rises, changes in relative elevation of the marsh plain willExpand
Final report for sea-level rise response modeling for San Francisco Bay estuary tidal marshes
The International Panel on Climate Change has identified coastal ecosystems as areas that will be disproportionally affected by climate change. Current sea-level rise projections range widely withExpand
Abstract Speed (km/hr) during flight is one of several factors determining the rate of migration (km/ day) and flight range of birds. We attached 26-g, back-mounted satellite-received radio tagsExpand
Wildfire, climate, and invasive grass interactions negatively impact an indicator species by reshaping sagebrush ecosystems
The results demonstrate that the cumulative loss of sagebrush to direct and indirect effects of wildfire has contributed strongly to declining sage-grouse populations over the past 30 y at large spatial scales, and provide a timely example of how altered fire regimes are disrupting recovery of Sagebrush ecosystems and leading to substantial declines of a widespread indicator species. Expand
Pinyon and Juniper Encroachment into Sagebrush Ecosystems Impacts Distribution and Survival of Greater Sage-Grouse☆,☆☆
ABSTRACT In sagebrush (Artemisia spp.) ecosystems, encroachment of pinyon (Pinus spp.) and juniper (Juniperus spp.; hereafter, “pinyon-junipeR&Rdquo;) trees has increased dramatically since EuropeanExpand
Evaluating Greater Sage-Grouse Seasonal Space Use Relative to Leks: Implications for Surface Use Designations in Sagebrush Ecosystems
The development of anthropogenic structures, especially those related to energy resources, in sagebrush ecosystems is an important concern among developers, conservationists, and land managers inExpand
Defining population structure and genetic signatures of decline in the giant gartersnake (Thamnophis gigas): implications for conserving threatened species within highly altered landscapes
The results show that northern drainage basin populations have higher connectivity than among central andSouthern basins populations, and that greater differentiation exists among the more geographically isolated populations in the central and southern portion of the giant gartersnake species’ range. Expand
Common raven occurrence in relation to energy transmission line corridors transiting human-altered sagebrush steppe
Energy-related infrastructure and other human enterprises within sagebrush steppe of the American West often results in changes that promote common raven (Corvus corax; hereafter, raven) populations.Expand
Does mercury contamination reduce body condition of endangered California clapper rails?
Model averaged estimates indicated a potential decrease in body mass of 20-22 g (5-7%) over the observed range of mercury concentrations, which indicates the potential for detrimental effects of mercury contamination on endangered California clapper rails in tidal marsh habitats. Expand