Skip to Main Content
Noteworthy bird records from northeastern Peru reveal connectivity and isolation in the western Amazonian avifaunaAuthor(s): Jacob B. Socolar; Juan Díaz-Alván; Percy Saboya Del Castillo; Lars Y. Pomara; Brian J. O'Shea; Susana Cubas Poclin; Douglas Stotz; Fabrice Schmitt; Devon Graham; Blaine H. Carnes; Ernesto Ruelas. Inzunza
Source: The Wilson Journal of Ornithology
Publication Series: Scientific Journal (JRNL)
Station: Southern Research Station
Download Publication (332.0 KB)
DescriptionAmazonian bird species often have patchy spatial distributions, and previous work has attributed this pattern to habitat specialization and dispersal limitation; however, we know comparatively little about the origins and maintenance of the isolated populations that constitute a patchy distribution. In this study, we ask whether patchy populations are interconnected by dispersal. We formulated 2 alternative hypotheses: (1) patchy populations are relicts of ancient connectivity or dispersal; and (2) patchy populations are centers of local abundance embedded in a matrix of contemporary dispersal or diffuse intervening populations. We confronted these hypotheses with circumstantial evidence derived from a unique suite of noteworthy bird records and geological observations from northeastern Peru. We found support for both hypotheses in different species, and sometimes within single species at different spatial scales. Phenotypically differentiated populations in relictual habitat patches provide strong support for the first hypothesis, whereas populations in recently created, ephemeral habitat patches provide strong support for the second. Colonizations of anthropogenic habitats are further examples of the second process, and they indicate ongoing changes in the porous connectivity of upper Amazonia. These results highlight the need for a conservation approach that accounts for metapopulation dynamics across patchy species ranges. Received 27 May 2016. Accepted 7 February 2017.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationSocolar, Jacob B.; Díaz-Alván, Juan; Del Castillo, Percy Saboya; Pomara, Lars Y.; O'Shea, Brian J.; Poclin, Susana Cubas; Stotz, Douglas; Schmitt, Fabrice; Graham, Devon; Carnes, Blaine H.; Inzunza, Ernesto Ruelas. 2018. Noteworthy bird records from northeastern Peru reveal connectivity and isolation in the western Amazonian avifauna. The Wilson Journal of Ornithology. 130(1): 94-111. https://doi.org/10.1676/16-082.1.
KeywordsAmazon, avian biogeography, connectivity, dispersal, peatlands, relictual distribution
- Factors influencing avian habitat selection between oak-hickory and mesic forests in southern Illinois
- The distribution and abundance of populations limited at multiple spatial scales
- Multiscale analysis of canopy arthropod diversity in a volcanically fragmented landscape
XML: View XML