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ISSN : 1226-9999(Print)
ISSN : 2287-7851(Online)
Korean Journal of Environmental Biology Vol.35 No.4 pp.452-460
DOI : https://doi.org/10.11626/KJEB.2017.35.30.452

Determinations of Shorebirds Diets during Spring Migration Stopovers in Korean Rice Fields

Hyung-Kyu Nam,Myung-Hyun Kim

Abstract

Rice fields are important stopover sites for the conservation of shorebirds during long-distance migration. These fields serve as food sources providing energy for the next leg of the journey. Shorebirds are able to change their preferred food source at stopover sites. However, the type and distribution of food resources remain unknown for the shorebirds in the Republic of Korea. Therefore, we studied the type and distribution pattern of food resource (macroinvertebrates, remaining rice, and other seeds) for shorebirds in the rice fields. We have identified potential and actual food sources for shorebirds in the rice fields. The potential food sources were collected by using a core-sampling method and the actual food source was ascertained by observational analysis. As a result, a total 19 species of benthic macroinvertebrates in 15 families were recorded as potential food sources. A total of 9 families in 9 orders of benthic macroinvertebrates known to be actual food sources were also recorded during the study period, including loaches, and a tuber of sea club rush. Also, the distribution of the food source depended on soil conditions generated by cultivation such as plowing, harrowing, and the use of pesticides. In the present study, we identified the type and distribution of food sources for shorebirds. This information can be used as essential primary baseline data for conservation of shorebirds using the rice fields of the Republic of Korea.

봄철 논습지를 이용하는 도요물떼새류의 먹이자원에 관한 연구

남형규,김명현

초록

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