[논문]강원도 홍천강 유역의 수달 서식지 이용

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doi:10.17663/jwr.2015.17.4.402

[국내논문] 강원도 홍천강 유역의 수달 서식지 이용
Use of stream environment by river otters in Hongcheon river, Gangwon Province, Korea 원문보기

한국습지학회지 = Journal of wetlands research, v.17 no.4, 2015년, pp.402 - 406

초록
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본 연구는 강원도 홍천강 유역에 서식하는 수달이 선호하는 지역을 파악하기 위해 수달의 배설물을 이용하여 하천환경의 현황을 분석하였다. 수달의 배설물은 영역표시 및 서식지이용에 대한 근거로 활용되기 때문이며, 이를 통한 하천의 주요 서식지를 확인할 수 있다. 내촌천과 군업천의 수달은 2009-2011년 총 8회 기간에 478개의 서식흔적이 발견되는 지점을 중심으로 조사되었으며 서식지 이용현황을 파악하기 위한 분산지수를 활용하였다. 두 하천 모두 계절적 이용의 변화가 나타났으며, 분산지수 값 1은 배설물이 집중되는 것을 의미하며 이는 하천 이용이 임의적이 아닌 것임을 나타내었다. 수달은 하천 주변의 5m 이내의 지역이며, 어류와 잔목이 풍부한 수변지역을 선호하는 것으로 나타났다. 수달의 서식지 이용에 대한 정확한 환경조건을 파악하기 위한 모델의 개발이 시급한 것으로 조사되었다.

Abstract ▼ AI-Helper

This study aims at favorable environmental conditions by river otter residing in Hongcheon river ecosystems using spraints along the river. Otter spraints were indicative of habitat use pattern and marking a territory in the areas. Nae-chon and Kuneob-chon river otter spraints were collected totaling 478 with 8 times during 2009-2011, and based on the number river use patterns were analyzed with the technique of index of dispersion. Results with larger than one indicated that river otter habitat use pattern were not random; instead they used preferred areas for habitat use. 'I' values greater than one indicate a clumped distribution and lower than one indicate random distribution. This study also demonstrated that we need a sophiscated linear model that should be developed to identify key habitat elements in river ecosystems.

Keyword

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문제 정의

Main objectives of this study were to found out important habitat components for river otter, to understand habitat use and selection by otter at different scale of environment, therefore to use this knowledge to understand river otters inhabiting in Nae-chon and Kuneob-chon in Gangwon Province catchments.
Also vegetations within 5 m of the river edge should be managed and protected. This study showed that materials along the bank and river formation should be important characteristics for river habitat use pattern based on the density of spraints.

제안 방법

Land use or percentages of the forest and field cover per units were extracted from the land cover map while presence/absence of road or the disturbance effect per units was obtained from transportation map of Korea. Water course characters (stream width, bottom structure type, bankment type), bankside vegetation types, width of riparian vegetation zones, presence/absence of the bridge and dam were checked visually from high resolution satellite images and measured using GIS and remote sensing techniques (Table 1).

대상 데이터

Otter sign data from the field survey (Park, 2010) was used in this study. The survey was conducted 8 times in 2009 with monthly intervals (May- November of 2009 and November 2010).

성능/효과

This could be a factor for fluctuation in water and food resources over a year (Park and Lee, 2012) reflecting different spraint counts in rivers. In conclusion river otter spraints along the river can be a useful tool to indicate habitat use pattern, but lacking in population density of river otters. This study showed that spraints were collected were not in a random but a clumped pattern implying river otters use habitats selectively, and further study needs to identify key habitat areas.
This study showed that spraints were collected were not in a random but a clumped pattern implying river otters use habitats selectively, and further study needs to identify key habitat areas. In conclusions river otters prefer habitats with trees and shrubs that seem to be correlated with high abundance of fishes and tree cavities, wood debris presumably for nesting and breeding activities. Also vegetations within 5 m of the river edge should be managed and protected.

후속연구

In conclusion river otter spraints along the river can be a useful tool to indicate habitat use pattern, but lacking in population density of river otters. This study showed that spraints were collected were not in a random but a clumped pattern implying river otters use habitats selectively, and further study needs to identify key habitat areas. In conclusions river otters prefer habitats with trees and shrubs that seem to be correlated with high abundance of fishes and tree cavities, wood debris presumably for nesting and breeding activities.

참고문헌 (22)

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상세보기
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상세보기
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상세보기
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상세보기
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상세보기
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상세보기
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Park, B and Lee, SD (2012). Studies on river otter habitat use pattern on Hongchun river in Gangwon province, J. of Korean Wetlands Society. 14(3), pp. 413-148. [Korean Literature]
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상세보기
Rosenzweig, ML (1968). Net primary productivity of terrestrial communities: prediction from climatological data, The American Naturalist. 102(923), pp. 67-74.

상세보기
Ruiz-Olmo, J and Palazon, S (1997). The diet of the otter (Lutra lutra L., 1758) in Mediterranean freshwater habitats, Wildlife Restoration. 2(2), pp.171-181.

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