Alteration of habitat structure and food resources by invasive smooth cordgrass affects habitat use by wintering saltmarsh birds at chongming dongtan, East China

Gan, Xiaojing, Choi, Chiyeung, Wang, Yong, Ma, Zhijun, Chen, Jiakuan and Li, Bo (2010) Alteration of habitat structure and food resources by invasive smooth cordgrass affects habitat use by wintering saltmarsh birds at chongming dongtan, East China. Auk, 127 2: 317-327. doi:10.1525/auk.2009.09147


Author Gan, Xiaojing
Choi, Chiyeung
Wang, Yong
Ma, Zhijun
Chen, Jiakuan
Li, Bo
Title Alteration of habitat structure and food resources by invasive smooth cordgrass affects habitat use by wintering saltmarsh birds at chongming dongtan, East China
Journal name Auk   Check publisher's open access policy
ISSN 0004-8038
1938-4254
Publication date 2010-04-01
Sub-type Article (original research)
DOI 10.1525/auk.2009.09147
Open Access Status Not yet assessed
Volume 127
Issue 2
Start page 317
End page 327
Total pages 11
Place of publication Petaluma, CA, United States
Publisher Central Ornithology Publication Office
Language eng
Formatted abstract
The exotic Smooth Cordgrass (Spartina alterniflora) has spread rapidly on the east coast of China over the past three decades and has greatly changed the native saltmarsh vegetation. We conducted bird surveys using mist nets in the exotic Spartina and native Common Reed (Phragmites australis) habitats at Chongming Dongtan of eastern China in the winters of 2004 and 2005. We related bird capture rates to habitat type (Phragmites or Spartina habitat), habitat structure (plant height and density), and food availability (densities of seeds and arthropods). The Spartina habitat was composed of shorter and denser vegetation and provided fewer food resources for birds than the Phragmites habitat. Bird capture rate was lower in Spartina, negatively related to plant density in the Spartina habitat, and positively correlated with overall arthropod abundance and plant height. Food resources consumed by birds were similar to those found in Phragmites habitat, irrespective of capture location. Our results suggest that the alteration of habitat structure and reduction in food resources are probably the proximate causes of lower avian species richness and relative abundance in the exotic Spartina than in the Phragmites habitat at Chongming Dongtan.
Keyword Food resources
Habitat structure
Phragmites australis
Plant invasion
Saltmarsh bird
Spartina alterniflora
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Biological Sciences Publications
 
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