Difference in the frequency of foraging of shorebirds depending on prey density, biomass, and energy density in a key stopover site

Title
Difference in the frequency of foraging of shorebirds depending on prey density, biomass, and energy density in a key stopover site
Author(s)
김백준; 최성훈; 이제민; 강성룡; 김민규; 이윤경; 구본주; 유주형
KIOST Author(s)
Koo, Bon Joo(구본주)Ryu, Joo Hyung(유주형)
Publication Year
2018-11-16
Abstract
After the completion of the Saemangeum reclamation, the Geum Estuary has emerged as a key stopover site (staging site) for feeding and roosting of migratory shorebirds in South Korea. However, there has not yet been any quantitative study on carrying capacity of the Geum Estuary tidal flats. For this, we conducted a series of study related to the status of
migratory shorebirds and carrying capacity of the Geum Estuary in 2017. To begin with, we monitored the species richness and maximum population size of shorebirds stopping over the Geum Estuary (Yubu Island and Seocheon) during high tide of the spring and fall. Also, we collected the coordinates of the feces of shorbirds in Yubu Island during low tide of the spring and fall. In order to estimate the availability of food resources, we surveyed the density, biomass, and energy density of benthic macro-invertebrates in Yubu Island tidal flat during the spring. As results, we found that there was a rapid population decline of shorebirds in the Geum Estuary between 2016 (189,872 inds., unpublished data) and 2017(99,237 inds.), although there was no significant difference of species richness of shorebirds. During the northward and southward migration of 2017, only 95,299 and 31,422 individuals stopped over the Geum Estuary, respectively. Such a year-to-year fluctuation of population size of shorebirds indicated that the Geum Estuary tidal flats are not stable to supportn carrying capacity of the Geum Estuary tidal flats. For this, we conducted a series of study related to the status of
migratory shorebirds and carrying capacity of the Geum Estuary in 2017. To begin with, we monitored the species richness and maximum population size of shorebirds stopping over the Geum Estuary (Yubu Island and Seocheon) during high tide of the spring and fall. Also, we collected the coordinates of the feces of shorbirds in Yubu Island during low tide of the spring and fall. In order to estimate the availability of food resources, we surveyed the density, biomass, and energy density of benthic macro-invertebrates in Yubu Island tidal flat during the spring. As results, we found that there was a rapid population decline of shorebirds in the Geum Estuary between 2016 (189,872 inds., unpublished data) and 2017(99,237 inds.), although there was no significant difference of species richness of shorebirds. During the northward and southward migration of 2017, only 95,299 and 31,422 individuals stopped over the Geum Estuary, respectively. Such a year-to-year fluctuation of population size of shorebirds indicated that the Geum Estuary tidal flats are not stable to support
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/22873
Bibliographic Citation
2018 응용생태공학회 추계학술대회, pp.59, 2018
Publisher
응용생태공학회
Type
Conference
Language
English
Publisher
응용생태공학회
Related Researcher
Research Interests

Coastal Remote Sensing,RS based Marine Surveillance System,GOCI Series Operation,연안 원격탐사,원격탐사기반 해양감시,천리안해양관측위성 운영

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