Published online December 7, 2023
https://doi.org/10.5141/jee.23.046
Journal of Ecology and Environment (2023) 47:19
Jin-Young Kim1 , Yong Ju Kwon2
, Ye Ji Kim2
, Yeong-Deok Han1
, Jung Soo Han1
, Chae Hui An1
, Yong Su Park1
and Dongsoo Kong2*
1Research Center for Endangered Species, National Institute of Ecology, Yeongyang 36531, Republic of Korea
2Department of Life Science, Kyonggi University, Suwon 16227, Republic of Korea
Correspondence to:Dongsoo Kong
E-mail dskong@kyonggi.ac.kr
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Background: Cambaroides similis is an endangered candidate species living in the stream of South Korea. Freshwater crayfish is known to decline rapidly not only domestically, but also internationally. Its decline is projected to be further exacerbated due to climate change. Understanding physical characteristics of the habitat is crucial for the conservation of an organism. However, comprehensive data regarding the distribution and physical habitat characteristics of C. similis are currently unavailable in South Korea. Thus, the objective of this study was to ascertain preferred ranges for water depth, current velocity, and streambed substrate of C. similis using Weibull model.
Results: In this study, C. similis was found at 59 sites across 12 regions in South Korea. Its optimal water depth preferences ranged from 11.9 cm to 30.1 cm. Its current velocity preferences ranged from 9.8 cm s–1 to 29.1 cm s–1. Its substrate preferences ranged from –5.1 Φm to –2.5 Φm. Median values of central tendency were determined as follows: water depth of 21.4 cm, current velocity of 21.2 cm s–1, and substrate of –4.1 Φm. Mean values of central tendency were determined as follows: water depth of 21.8 cm, current velocity of 22.0 cm s–1, and substrate of –4.4 Φm. Mode values of central tendency were determined as follows: water depth of 21.7 cm, current velocity of 20.1 cm s–1, and substrate of –3.7 Φm.
Conclusions: Based on habitat suitability analysis, physical microhabitat characteristics of C. similis within a stream were identified as Run section with coarse particle substrate, low water depth, and slow current velocity. Due to high sensitivity of these habitats to environmental changes, prioritized selection and assessment of threats should be carried out as a primary step.
Keywords: Cambaroides similis, current velocity, endangered candidate species, streambed substrate, water depth, Weibull model
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Research 2024-12-12 47:48
Estimation of physical microhabitat suitability for Koreoleptoxis globus (Mollusca: Gastropoda) using probability distribution modelsJin-Young Kim1, Jeong-Ki Min2, Ye Ji Kim3, Yong Su Park1 and Dongsoo Kong3*