A5052025697- Avian ecology and behavior
- Fish Ecology and Management Studies
- Marine animal studies overview
- Marine and fisheries research
- Marine and environmental studies
- Marine and coastal plant biology
- Isotope Analysis in Ecology
- Wildlife Ecology and Conservation
- Microplastics and Plastic Pollution
- Coastal wetland ecosystem dynamics
- Bryophyte Studies and Records
- Animal Ecology and Behavior Studies
- Water Quality and Resources Studies
- Geological Studies and Exploration
- Cephalopods and Marine Biology
- Land Use and Ecosystem Services
- Fire effects on ecosystems
- Hydrology and Sediment Transport Processes
- Species Distribution and Climate Change
- Plant and animal studies
- Oil Spill Detection and Mitigation
- Aquatic Invertebrate Ecology and Behavior
- Animal Behavior and Reproduction
- Rangeland and Wildlife Management
- Wildlife Conservation and Criminology Analyses
NOAA National Marine Fisheries Service
2013-2024
NOAA National Marine Fisheries Service Northwest Fisheries Science Center
2013-2024
National Oceanic and Atmospheric Administration
2010-2024
University of Kansas
2000-2002
University of New Hampshire
1992
Ecological interactions among invading species are common and may often be important in facilitating invasions. Indeed, the presence of one nonindigenous can act as an agent disturbance that facilitates invasion a second species. However, most studies anecdotal do not provide substantive evidence have any community-level effects. Here, using combination field experiments observations we examine introduced New England kelp forests ask whether these altered paradigms describing subtidal...
There is an exponentially increasing amount of human-associated litter in our oceans. This marine results a wide range potential impacts on the environment. These from introduction adsorbed polychlorinated biphenyls (PCBs) into food webs to entanglement and subsequent mortality threatened seabirds, fish, turtles mammals anthropogenic derelict fishing gear. While there has been major effort afoot publicize these issues, remains paucity data scientific research underpin solutions problems. To...
Adult seabirds experience predation by many species. At sea, they are taken predatory fish such as white sharks Carcharodon carcharias (Johnson et al. 2006), and marine mammals including killer whales Orca orcinus (Dahleim & White 2010), true seals (Penny Lowry 1967, Cobley Bell 1998), fur-seals sealions (McHugh 1952, Long Gilbert 1997, David 2003, Lalas 2007, Charbonnier walrus Odobenus rosmarus (Mallory 2004), sea otters Enhydra lutris (Riedman Estes 1988). On land, native non-native...
There has been considerable debate in the study of hybrid zones as to whether hybrids may be superior parental types within area contact (bounded superiority). In birds, naturally occurring hybridization is relatively common, and this group always involves mate choice. If are superior, females choosing heterospecific mates should expected show higher fitness under conditions prevalent zone. Hybrid superiority these circumstances would reduce reinforcement thereby help maintain To examine...
We tested the hypothesis that segregation in wintering areas is associated with population differentiation a sentinel North Pacific seabird, rhinoceros auklet ( Cerorhinca monocerata ). collected tissue samples for genetic analyses on five breeding colonies western Ocean (Japan) and 13 eastern (California to Alaska), deployed light-level geolocator tags 12 delineate areas. Geolocator were previously one colony Japan. There was strong between populations vs. Ocean, likely due two factors....
We present a prototype monitoring strategy for estimating the density and number of occupied burrows burrow-nesting seabirds. use data management questions from Washington State as an example that can be applied to seabirds at single- or multi-island scales. also demonstrate how habitat assessments conducted concurrently. Specifically, we compared occupancy Rhinoceros Auklet (Cerorhinca monocerata) nesting colonies in California Current Salish Sea 1970s, 1980s, today. estimated 36 152, 1546,...
Catastrophic die-offs can have important consequences for vertebrate population growth and biodiversity, but catastrophic risks are not commonly incorporated into endangered-species recovery planning. Natural (e.g., landslides, floods) anthropogenic toxic leaks spills) catastrophes pose a challenge evolutionarily significant units (ESUs) of Pacific salmon listed under the Endangered Species Act teetering at precariously low levels. To spread among Puget Sound chinook populations, strategies...
The nesting ecology of breeding pairs the Western Gull × Glaucous-winged (Larus occidentalis glaucescens) hybrid complex was investigated at two locations in coastal Washington. In Grays Harbor, performance (clutch size, hatching and fledging success) highest vegetated habitat where nests were most dense natural screens blocked nearest neighbor. Egg loss, presumably from gull predators, common except areas vegetation. At Tatoosh Island, egg loss rare, similar rock habitats. To test if...
We investigated attributes of nests, aggressive interactions, and reproductive success in mixed single species subcolonies Great Black-backed Gulls (Larus marinus) Herring (L. argentatus) on Appledore Island, Maine. Distances to the nearest neighboring nest were smaller for L. argentatus than marinus, with greatest distances between nests at edges both species. More had natural screens (vegetation or rock >30 cm tall) adjacent them did marinus but screen presence not differ among positions...
Bird scaring lines (BSLs) protect longline fishing gear from seabird attacks, save bait, reduce incidental mortality and are the most commonly prescribed bycatch mitigation measure worldwide. We collaborated with fishermen to assess efficacy of applying BSL regulations demersal sablefish fishery in Alaska a similar along U.S West Coast. In contrast Alaska, some U.S. Coast vessels use floats line keep hooks off seafloor, where scavengers degrade bait target catch. Our results confirmed that...
Ecological interactions among invading species are common and may often be important in facilitating invasions. Indeed, the presence of one nonindigenous can act as an agent disturbance that facilitates invasion a second species. However, most studies anecdotal do not provide substantive evidence have any community-level effects. Here, using combination field experiments observations we examine introduced New England kelp forests ask whether these altered paradigms describing subtidal...
Abstract Marine hydrokinetic power projects will operate as marine environments change in response to increased atmospheric carbon dioxide concentrations. We considered how tidal development and stressors resulting from climate may affect Puget Sound species listed under the U.S. Endangered Species Act (ESA) their food web. used risk tables assess singular combined effects of change. Tidal posed risks ESA‐listed species, with incorporation these on predators prey species. In contrast,...