[논문]법정보호종, 흰발농게(Austruca lactea) 서식 개체수 추정에 대한 검토와 대안

유재원; 김창수; 박미라; 정수영; 이채린; 김성태; 안동식; 이창근; 한동욱; 백용해; 박영철

doi:10.17663/jwr.2021.23.2.122

법정보호종, 흰발농게(Austruca lactea) 서식 개체수 추정에 대한 검토와 대안
Considerations and Alternative Approaches to the Estimation of Local Abundance of Legally Protected Species, the Fiddler Crab, Austruca lactea 원문보기

한국습지학회지 = Journal of wetlands research, v.23 no.2, 2021년, pp.122 - 132

유재원 ((주)한국연안환경생태연구소) , 김창수 ((주)한국연안환경생태연구소) , 박미라 ((주)한국연안환경생태연구소) , 정수영 ((주)한국연안환경생태연구소) , 이채린 ((주)한국연안환경생태연구소) , 김성태 ((주)한국연안환경생태연구소) , 안동식 ((주)한국연안환경생태연구소) , 이창근 (한국어촌어항공단) , 한동욱 (PGA생태연구소) , 백용해 ((사)녹색습지교육원) , 박영철 ((주)뉴워터텍)

초록
AI-Helper

본 연구에서는 우리나라의 갯벌에서 조사대상으로 삼는 멸종위기야생생물이자 해양보호생물, 흰발농게(Austruca lactea)의 전체 개체수 추정 방법을 검토하였다. 일반적으로 무한모집단에 대한 전수조사는 불가능하며 이는 갯벌 내 제한된 서식처에서 개체수를 추정하더라도 마찬가지이다. 표본으로부터 추정되는 서식 밀도 역시 다양한 생물학적, 생태학적 요인들로 인해 높은 변동성을 보인다. 서식처 경계와 면적은 측정 오차뿐만 아니라 생물의 주기성이나 리듬 활동(주야, 간만 주기 등)에 따라서도 달라진다. 따라서 밀도와 서식처 면적으로 산출되는 전체 개체수는 일시적인 것으로 간주되어야 한다. 이 같은 추정은 인천 송도 갯벌에서 3년 간 관찰된 흰발농게(A. lactea)의 평균 밀도와 표준오차 범위 그리고 공간분포의 시공간적 변동성에 근거하면 타당한 것으로 볼 수 있었다. 본 연구에서는 로지스틱 회귀모형의 출현 확률인 50%를 기준으로, 서식처 보존 가치의 중요성을 반영하는 잠재적 서식처 면적을 전체 개체수 추정의 대안으로 제시하였다. 보편성을 갖춘 모형으로부터 예측되는 잠재적 서식처는 대상종의 주요 환경조건이 급격하게 변하지 않는다면 시간에 따라 일정한 모습을 유지할 것이다. 특정종을 대상으로 개발되는 모형은 추후 서식처 복원/조성 사업에서도 원하는 생물의 정착을 유도하는데도 활용이 가능할 것으로 기대된다.

Abstract ▼ AI-Helper

We reviewed the methods employed in Korean tidal flat surveys to measure the local abundance of the endangered wildlife and marine protected species, the fiddler crab, Austruca lactea. A complete census for infinite population is impossible even in a limited habitat within a tidal flat, and density estimates from samples strongly vary due to diverse biological and ecological factors. The habitat boundaries and areas shift with periodicities or rhythmic activities of organisms as well as measurement errors. Hence the local abundance calculated from density and habitat areas should be regarded as transient. This conjecture was valid based on the spatio-temporal variations of the density averages, standard error ranges, and spatial distribution of the crab, A. lactea observed for 3 years (2015-2017) in Songdo tidal flat in Incheon. We proposed the potential habitat areas using the occurrence probability of 50% from logistic regression model, reflecting the importance of habitat conservation value as an alternative to local abundance. The spatial shape of potential habitat predicted from a generalized model would remain constant over time unless the species' critical environmental conditions change rapidly. The species-specific model is expected to be used for the introduction of desired species in future habitat restoration/creation projects.

주제어

표/그림 (6)

그림 Fig. 1. A case study drawing habitat boundary map of the fiddler crab (A. lactea) in Sunyudo, Gunsan, Jeonbuk Province (red dotted lines, patch boundaries; Yellow X, 1~2 individuals of the crab) (National Institute of Ecology, 2019).
그림 Fig. 2. A case study seasonally investigating density of the fiddler crab, A. lactea in Songdo tidal flat Wetland Protected Area in Incheon in 2016 (YGO, 2016). (a) the crab and its burrows, (b) example photos of the density estimation process of the crab with quadrat samplings (0.25㎡), (c) the spatio-temporal distribution of the crab density.
그림 Fig. 3. Seasonal variation of density averages (Inds./㎡) and 99.7% confidence interval (3×SE; SE, standard error of the mean) of the fiddler crab, A. lactea in Songdo tidal flat Wetland Protected Area in Incheon between 2015 and 2017 (Yeonsu-gu Office, 2015, 2016, 2018).
그림 Fig. 4. A case study of probability-based optimum habitat prediction for three ophiuroids, Ophiura kinbergi, O. sarsi and O. sarsi vadicola. (a) nationwide sampling stations in Yellow Sea, Southern and East Sea around Korean Peninsula, (b) prediction of optimal habitat ranges of the Yellow Sea bottom cold water (YSBCW) indicator species, O. sarsi vadicola, based on the occurrence probability of 70% and the correspondence between the prediction and the characteristic temperature-salinity ranges of YSBCW (Hong et al., 1995).
그림 Fig. 5. Predicted occurrence probability of the fiddler crab, A. lactea, with given sediment mean grain size and tidal elevation from binomial logistic regression model observed in Gochang tidal flat, Jeonbuk Province.
그림 Fig. 6. Spatial representation of the occurrence probability of the fiddler crab, A. lactea in Gochang tidal flat in Jeonbuk Province (FIPA, 2020).

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저자의 다른 논문 :

표제어: PCR

동의어: Packet Collision Rate

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용어 설명: PCR은 세균 특이성이 있는 primer를 이용하여 적은 수의 세균이 있을지라도 쉽게 검출할 수 있는 유용한 방법이며, 이를 이용하여 구강 내 치면세균막이나 타액에서 직접 세균을 검출할 수 있게 되었다[8].

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