Annual Variation of Abundance and Composition in Forest Bird Assemblages on Navarino Island, Cape Horn Biosphere Reserve, Chile

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Article on the annual variation of abundance and composition in forest bird assemblages on Navarino Island, Cape Horn Biosphere Reserve, Chile.

Creator(s):
Creation Date: 2009  
Partner(s):
UNT College of Arts and Sciences
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UNT Scholarly Works
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Creator (Author):
Ippi, Silvina

Universidad de Magallanes

Creator (Author):
Anderson, Christopher B.

Universidad de Magallanes; Instituto de Ecología y Biodiversidad

Creator (Author):
Rozzi, Ricardo, 1960-

University of North Texas; Universidad de Magallanes; Instituto de Ecología y Biodiversidad

Creator (Author):
Elphick, Chris S.

Universidad de Magallanes; University of Connecticut

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Date(s):
  • Creation: 2009
Description:

Article on the annual variation of abundance and composition in forest bird assemblages on Navarino Island, Cape Horn Biosphere Reserve, Chile.

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Abstract: The structure and dynamics of avian communities in the temperate forests of southern South America have been generally studied during the breeding season (November - March), and reports about seasonal variations and migratory behavior of species are almost lacking. This study examined intra-annual variations on a monthly basis in bird species composition and abundance in the world's southernmost forested ecosystems, found in the Cape Horn Biosphere Reserve, Chile (55°S). Combining data obtained through point-count surveys, mist-netting, and checklist methods, the authors recorded a total of 34 bird species belonging to 20 families. Eighteen of these species were Passeriformes, and the most abundant year-round resident species were Thorn-tailed Rayadito (Aphrastura spinicauda) and Patagonian Sierra-Finch (Phrygilus patagonicus). The most abundant seasonal migrants species were White-crested Elaenia (Elaenia albiceps) and Southern House Wren (Troglodytes musculus). Point-count and mist-netting methods showed a reduction in species richness and abundance during winter, with one third of the bird assemblage absent. This proportion was lower than that documented for more northern Nothofagus forests. Additionally, the authors' data provided no evidence that intra-annual patterns of avian community structure were significantly affected by a recently implemented tourism trail through the Omora Park. The authors believe that understanding seasonal patterns of richness, abundance, and migratory status of Chilean temperate forests birds will help to better understand the world's southernmost forest ecosystem, implement effective conservation, facilitate sustainable ecotourism, and lead to new ecological and evolutionary research.

Physical Description:

15 p.

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Subject(s):
Keyword(s): forest birds | subantarctic forests | Chile | Cape Horn | point-count surveys
Source: Ornitologia Neotropical, 2009, Neotropical Ornithological Society, pp. 231-245
Series Title: Sub-Antarctic Biocultural Conservation Program
Partner:
UNT College of Arts and Sciences
Collection:
UNT Scholarly Works
Identifier:
  • ARK: ark:/67531/metadc97951
Resource Type: Article
Format: Text
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Access: Public
Citation:
Publication Title: Ornitologia Neotropical
Volume: 20
Page Start: 231
Page End: 245
Pages: 15
Peer Reviewed: Yes