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http://dx.doi.org/10.17663/JWR.2015.17.3.264

Status of Birds in the Nakdong River Estuary Bird Sanctuary before the Four Major Rivers Project  

Kim, Bum-soo (Dept. of Ecological Engineering, Pukyong National University)
Yeo, Unsang (Busan Development Institue)
Oh, Dongha (Busan Development Institue)
Sung, Kijune (Dept. of Ecological Engineering, Pukyong National University)
Publication Information
Journal of Wetlands Research / v.17, no.3, 2015 , pp. 264-272 More about this Journal
Abstract
Understanding bird status is essential for the systematic and sustainable management of the Nakdong River Estuary, taking into consideration the relationship between ecosystems and the bird species. In this study, bird status in the Nakdong River Estuary Bird Sanctuary prior to the Four Major Rivers Project was analyzed using the bird monitoring data (2003-2011) from surveys conducted by the Busan Development Institute. The high percentage of winter visitors in terms of both species diversity (38.36%) and individual bird numbers (63.14%) suggest that the Nakdong River Estuary is an important wintering site for migratory birds. Cumulative numbers of individual birds were higher in Myungji (208,601), West Nakdong River (202,444), Eulsukdo (153,232), and Baekhap Doyodeung (150,595). The total numbers of migratory species were higher in Eulsukdo (171), Ilungdo (124), Myungji (132), and Samrak (121). Among the 232 species found in the Nakdong River Estuary, Anas platyrhynchos (17.71%) was the most common species, followed by Anas poecilorhyncha (8.85%), Larus crassirostris (6.48%), Anser fabalis (6.09%), Anas penelope (5.16%), and Calidris alpina (4.22%). Most bird taxa, except shelducks, showed annual fluctuations in individual numbers, with increasing frequency during survey periods. Of these, cormorants, swans, and gulls showed higher fluctuations than other taxa. Swans decreased drastically in numbers in 2007-2008 and 2009-2010 compared to previous years. Shore birds, gulls, wagtails, and other forest birds were also less common in 2010-2011. These results suggest that there were some environmental changes that might have affected the birds in the Nakdong River Estuary. Overall, the results suggest that habitat types affect the distribution of dominant species.
Keywords
Dominant species; Taxon; Annual fluctuation; Habitat type; Cumulative numbers;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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