Resource selection and space use by sea ducks during the non-breeding season: Implications for habitat conservation planning in urbanized estuaries

Cruz, Susan E. W. De La; Eadie, John M.; Miles, A. Keith; Yee, Julie L.; Spragens, Kyle A.; Palm, Eric C.; Takekawa, John Y.

doi:10.1016/j.biocon.2013.10.021

Cited by 22 publications

(17 citation statements)

References 73 publications

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“…For several species of North American sea ducks, long-term population declines have increased conservation concern and highlighted the need for focused understanding of annual cycle dynamics (Alisauskas et al 2004;Zydelis et al 2006;De La Cruz et al 2014;Bowman et al 2015). The causes of these declines remain uncertain in part because sea ducks range across the arctic during summer and inhabit often remote, offshore marine environments during the nonbreeding period.…”

Section: R a F Tmentioning

confidence: 99%

Annual cycle of White-winged Scoters (Melanitta fusca) in eastern North America: migratory phenology, population delineation, and connectivity

et al. 2018

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Understanding full annual cycle movements of long-distance migrants is essential for delineating populations, assessing connectivity, evaluating crossover effects between life stages, and informing management strategies for vulnerable or declining species. We used implanted satellite transmitters to track up to 2 years of annual cycle movements of 52 adult female White-winged Scoters (Melanitta fusca (Linnaeus, 1758)) captured in the eastern United States and Canada. We used these data to document annual cycle phenology; delineate migration routes; identify primary areas used during winter, stopover, breeding, and molt; and assess the strength of migratory connectivity and spatial population structure. Most White-winged Scoters wintered along the Atlantic coast from Nova Scotia to southern New England, with some on Lake Ontario. White-winged Scoters followed four migration routes to breeding areas from Quebec to the Northwest Territories. Principal postbreeding molting areas were in James Bay and the St. Lawrence River estuary. Migration phenology was synchronous regardless of winter or breeding origin. Cluster analyses delineated two primary breeding areas: one molting area and one wintering area. White-winged Scoters demonstrated overall weak to moderate connectivity among life stages, with molting to wintering connectivity the strongest. Thus, White-winged Scoters that winter in eastern North America appear to constitute a single continuous population.

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Section: R a F Tmentioning

confidence: 99%

Annual cycle of White-winged Scoters (Melanitta fusca) in eastern North America: migratory phenology, population delineation, and connectivity

et al. 2018

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“…Although statistically accounting for region and site effects, mercury concentrations in bird eggs differed among years in all species (avocets: F 2,532 =8. 43 fig. 41).…”

Section: Shorebird and Tern Egg Mercury Exposure By Year And Calendarmentioning

confidence: 99%

Mercury in birds of San Francisco Bay-Delta, California: trophic pathways, bioaccumulation, and ecotoxicological risk to avian reproduction

Ackerman¹,

Eagles‐Smith²,

Heinz³

et al. 2014

Open-File Report

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For more information on the USGS-the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment-visit http://www.usgs.gov or call 1-888-ASK-USGS For an overview of USGS information products, including maps, imagery, and publications, visit http://www.usgs.gov/pubprodTo order this and other USGS information products, visit http://store.usgs.gov Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner.Suggested citation: Ackerman, J.T., Eagles-Smith, C.A., Heinz, G.H., De La Cruz, S.E., Takekawa, J.Y., Miles, A.K., Adelsbach, T.L., Herzog, M.P., Bluso-Demers, J.D., Demers, S.A., Herring, G., Hoffman, D.J., Hartman, C.A., Willacker, J.J., Suchanek, T.H., Schwarzbach, S.E., and Maurer, T.C., 2014, Mercury in birds of San Francisco Bay-Delta, California-Trophic pathways, bioaccumulation, and ecotoxicological risk to avian reproduction: U.S. Geological Survey Open-File Report 2014-1251, 202 p., http://dx.doi.org/10.3133/ofr20141251. Relations between log whole blood total mercury (THg) concentrations (µg/g ww) and whole blood stable isotope ratios of carbon (δ 13 C), nitrogen (δ 15 N), and sulfur (δ 34 S) in pre-breeding (green symbols) and breeding ( Relations between log whole blood total mercury (THg) concentrations (µg/g ww) and whole blood table isotope ratios of carbon (δ 13 C), nitrogen Correlation between single-species in mean fish total mercury (THg) concentrations (µg/g dw; ± SE), and corresponding Forster's tern THg concentrations in pre-breeding blood (µg/g ww; ± SE), breeding blood (µg/g ww; ± SE), and eggs (µg/g fww; ± SE) sampled from the same wetland location where fish were sampled .. Leverage plots for the relationship between total mercury (THg) concentrations (mg/g dry weight) and a suite of biomarkers in brains of prebreeding Forster's tern and Caspian tern adults (closed circles and closed triangles, respectively), breeding adult Forster's terns (semi-closed circles), and Tables Table 1. Population range sizes and percentage use of habitat types within 50 and 95 percent utilization distributions (UD) of pre-breeding American avocets and black-necked stilts radio-marked at each site during spring 2005 and 2006 Table 9.Mean percent number ( Table 16. Esophageal contents expressed as aggregate percent dry mass for surf scoters collected during 2003-2004 (2004) and 2004-2005 (2005) Table 17. Sample size, geometric means (µg/g dw), ± standard error and 95 percent CI for hepatic selenium (Se) and total mercury (THg), and renal cadmium (Cd) in female surf scoters only collected during fall (F), winter (W), spring (S) 2003-04 (2004) and 2004-05 (2005) Executive SummarySan Francisco Bay Estuary in northern California has a legacy of mercury ...

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“…Certain coastal regions support congregations of several hundred to several thousand goldeneyes in a given location and are likely associated with the patchy distribution of mussels (Horwood , Eadie et al , De La Cruz et al , Important Bird Areas Canada ). Some of these regions overlap with areas of anthropogenic activity.…”

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confidence: 99%

Annual Winter Site Fidelity of Barrow's Goldeneyes in the Pacific

et al. 2019

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Coastal regions on the Pacific north coast of North America provide important wintering habitat for many species of sea ducks. Although winter range and habitat preferences are well described for most species, fidelity to coastal wintering sites is generally undocumented. Fidelity is an important factor necessary for understanding interactions with coastal developments and activities and corresponding management strategies. We used data from Barrow's goldeneyes (Bucephala islandica), a sea duck that winters predominantly in nearshore habitats along the Pacific north coast, to investigate inter‐annual fidelity to, and intra‐annual fidelity within, coastal wintering sites. Between 2006 and 2015, we marked goldeneyes on breeding, molting, and wintering sites with satellite transmitters. We retained 4,931 locations in coastal habitats from 221 goldeneyes across 4 coastal regions for our analyses. These birds demonstrated high inter‐annual fidelity to coastal wintering sites; 75% of selected wintering sites were within 29 km of sites used the previous winter. Inter‐annual fidelity to wintering sites was similar between sex and age classes but differed by coastal region. Goldeneyes from southcentral Alaska, USA, expressed greater inter‐annual fidelity relative to birds from northern or southern British Columbia, Canada, and southeast Alaska. Goldeneyes also expressed high intra‐annual fidelity within wintering sites, with 75% of individuals averaging within‐season movements of ≤9 km. Intra‐annual fidelity was lesser for female than male goldeneyes but did not differ between hatch‐year and after‐hatch‐year birds. We found regional variation in intra‐annual fidelity, with goldeneyes from southcentral Alaska expressing greater intra‐annual fidelity compared to birds from other regions. High inter‐ and intra‐annual winter site fidelity by Barrow's goldeneyes suggests that, at a population level, habitat use is predictable and can be used to inform risk assessment or to evaluate factors affecting habitat choice. Also, low dispersal among wintering sites suggests that recovery from population perturbations, whether caused by natural or anthropogenic events, will be protracted. © 2019 The Wildlife Society.

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Resource selection and space use by sea ducks during the non-breeding season: Implications for habitat conservation planning in urbanized estuaries

Cited by 22 publications

References 73 publications

Annual cycle of White-winged Scoters (Melanitta fusca) in eastern North America: migratory phenology, population delineation, and connectivity

Annual cycle of White-winged Scoters (Melanitta fusca) in eastern North America: migratory phenology, population delineation, and connectivity

Mercury in birds of San Francisco Bay-Delta, California: trophic pathways, bioaccumulation, and ecotoxicological risk to avian reproduction

Annual Winter Site Fidelity of Barrow's Goldeneyes in the Pacific

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