Population abundance and trends of Saltmarsh (Ammodramus caudacutus) and Nelson’s (A. nelsoni) Sparrows: influence of sea levels and precipitation
@article{Shriver2015PopulationAA, title={Population abundance and trends of Saltmarsh (Ammodramus caudacutus) and Nelson’s (A. nelsoni) Sparrows: influence of sea levels and precipitation}, author={W. Gregory Shriver and Kathleen M. O’Brien and Mark J. Ducey and Thomas P. Hodgman}, journal={Journal of Ornithology}, year={2015}, volume={157}, pages={189-200} }
Evidence of biological responses to climate change continues to grow. Long-term monitoring programs are critical in documenting these changes as well as identifying the primary stressors that may influence a species’ ability to adapt to changing climate. Eastern North American salt marshes support the greatest number of endemic salt marsh vertebrates globally, two of which are sympatric from southern Maine to northern Massachusetts, USA. Saltmarsh Sparrows (Ammodramus caudacutus), listed…
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References
SHOWING 1-10 OF 54 REFERENCES
Fine-Scale Population Structure and Asymmetrical Dispersal in an Obligate Salt-Marsh Passerine, the Saltmarsh Sparrow (Ammodramus caudacutus)
- Environmental Science
- 2012
The genetic structure that is found in Saltmarsh Sparrows may result from natal philopatry and breeding-site fidelity, combined with restricted dispersal due to obligate dependence on a patchy habitat, and suggest that fine-scale population structure may be important in some migratory passerines.
Nesting ecology of Saltmarsh Sharp-tailed Sparrows in a tidally restricted salt marsh
- Environmental ScienceWetlands
- 2009
It is hypothesize that restoration efforts will have short-term negative impacts on Saltmarsh Sharptailed Sparrow populations until salt marsh habitats are restored in higher sections of the marsh.
Planning for Sea-Level Rise: Quantifying Patterns of Saltmarsh Sparrow (Ammodramus Caudacutus) Nest Flooding Under Current Sea-Level Conditions
- Environmental Science
- 2011
ABSTRACT.
Climate change and sea-level rise pose an imminent threat to the survival of coastal ecosystems, but the mechanisms by which animals inhabiting these areas may be affected by these…
Tidal Marshes: A Global Perspective on the Evolution and Conservation of Their Terrestrial Vertebrates
- Environmental Science
- 2006
Tidal marshes and their endemic fauna face broad threats from a variety of human-caused environmental changes, and future research should focus on global inventories, intercontinental comparative work, and investigation to determine why almost all presently described endemic taxa appear to be found in North America.
FLOOD TIDES AFFECT BREEDING ECOLOGY OF TWO SYMPATRIC SHARP-TAILED SPARROWS
- Environmental Science
- 2007
It is shown that Saltmarsh Sharp-tailed Sparrow males were nonterritorial and promiscuous and provided no parental care to young, and adaptation to tidal flooding partially explains the evolution of the unique Saltm Marsh Sharp-tails Sparrow mating system.
REDEFINING RANGE OVERLAP BETWEEN THE SHARP-TAILED SPARROWS OF COASTAL NEW ENGLAND
- Environmental Science
- 2002
Abstract With the designation of Nelson's Sharp-tailed Sparrow (Ammodramus nelsoni) and Saltmarsh Sharp-tailed Sparrow (A. caudacutus) as species of high conservation priority in the northeastern…
Application of Genealogical-Concordance Principles to the Taxonomy and Evolutionary History of the Sharp-Tailed Sparrow (Ammodramus caudacutus)
- Biology, Environmental Science
- 1993
By taxonomically formalizing what appears to be a fundamental phylogenetic partition among Sharp-tailed Sparrow populations, study of the biogeographic history, reproductive relationships, and management of the forms will be facilitated.
The importance of productivity to the dynamics of a Swainson's thrush population
- Environmental Science
- 1996
It is suggested that Swainson's Thrushes at Palomarin are most limited by the production of young on the breeding grounds, and the link between productivity and adult abundance in this population is strengthened.
Trends and population dynamics of a Velvet Scoter (Melanitta fusca) population: influence of density dependence and winter climate
- BiologyJournal of Ornithology
- 2013
It is concluded that density dependence and winter conditions must be taken into consideration when discussing population changes in seaducks in general and the Velvet Scoter in particular.