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Resource Partitioning by Mangrove Bird Communities in North Australia

Mohd-Azlan, Jayasilan, Noske, Richard A. and Lawes, Michael J. (2014). Resource Partitioning by Mangrove Bird Communities in North Australia. Biotropica,46(3):331-340.

Document type: Journal Article
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IRMA ID 84376995xPUB37
Title Resource Partitioning by Mangrove Bird Communities in North Australia
Author Mohd-Azlan, Jayasilan
Noske, Richard A.
Lawes, Michael J.
Journal Name Biotropica
Publication Date 2014
Volume Number 46
Issue Number 3
ISSN 0006-3606   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-84899958222
Start Page 331
End Page 340
Total Pages 10
Place of Publication United States of America
Publisher Wiley-Blackwell Publishing, Inc.
HERDC Category C1 - Journal Article (DIISR)
Abstract Mangrove bird communities in north Australia comprise relatively few passerine species compared with other arboreal habitats in the region. Mangroves are dominated by a few tree species and there are potentially few resource axes available for partitioning by terrestrial birds. Competition for limited resources is predicted to cause strong niche differentiation and a highly structured, but low diversity, bird assemblage. Using multivariate and bipartite network analyses based on 1771 foraging observations (33% of 5320 behavioral observations), we examined resource partitioning by 20 terrestrial bird species in mangroves of north Australia. The mangrove bird community largely comprised generalist insectivores that partitioned insects by size with moderate-to-high interspecific overlap in diet. Gleaning for insects was the most common foraging mode. Few species specialized on nectar. Flowers of one or more mangrove species were available in every month of the year and insect abundance was correlated with flowering peaks. Niche differentiation by birds was determined by food type and foraging mode more than by broad spatial (mangrove zones) or temporal (seasonal) segregation of the use of resources. There was little evidence of bird species saturation or species sorting, suggesting loose species packing and a lesser role than expected for species interactions and interference competition in structuring the bird assemblage in mangroves.
Keywords Avifauna
Bipartite network analysis
Community ecology
Niche segregation
Plant-animal interactions
DOI http://dx.doi.org/10.1111/btp.12108   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
Description for Link Link to publisher's version
URL http://onlinelibrary.wiley.com/doi/10.1111/btp.12108/abstract;jsessionid=5048814593E71BA61B9316248004F6D8.f03t02
 
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Created: Wed, 19 Aug 2015, 12:04:32 CST