[논문]확률분포모형을 이용한 하루살이속(Ephemera) 종들의 물리적 미소서식처 적합도 평가

공동수; 송재하

doi:10.15681/kswe.2023.39.5.396

[국내논문] 확률분포모형을 이용한 하루살이속(Ephemera) 종들의 물리적 미소서식처 적합도 평가
Estimation on Physical Microhabitat Suitability for Species of the Mayfly Genus Ephemera (Ephemeroptera: Ephemeridae) Using Probability Distribution Models 원문보기

한국물환경학회지 = Journal of Korean Society on Water Environment, v.39 no.5, 2023년, pp.396 - 412

Abstract ▼ AI-Helper

Species from the mayfly genus Ephemera (Order Ephemeroptera) was assessed for their physical microhabitat suitability (namely E. strigata, E. separigata, and E. orientalis-sachalinensis). Probability distribution models (Exponential, Normal, Lognormal, Logistic, Weibull, Gamma, Beta, and Gumbel) based on the data collected from 23,957 sampling units of 6,787 sites in Korea from 2010 to 2021 were used. Mode and standard deviation calculated from the best-fitting models to species distribution along a water depth gradient were 265 cm and 159 cm in E. orientalis-sachalinensis; 10 cm and 83 cm in E. strigata; 20 cm and 15 cm in E. separigata, respectively. The current velocity gradient was 22 cm/s and 40 cm/s in E. orientalis-sachalinensis; 60 cm/s and 53 cm/s in E. strigata; 82 cm/s and 25 cm/s in E. separigata, respectively. The mean diameter (phi scale) of substrate grains were -3.6 and 2.2 in E. orientalis-sachalinensis; -7.4 and 1.5 in E. strigata; -5.8 and 0.9 in E. separigata, respectively. Habitat suitability range of E. orientalis-sachalinensis was estimated to be 161~369 cm (water depth), 5~44 cm/s (current velocity), -5.2~-2.0 (mean diameter); 3~34 cm (water depth), 36~94 cm/s (current velocity), -8.1~-6.3 (mean diameter) for E. strigata; 12~32 cm (water depth), 63~96 cm/s (current velocity), -6.3~-5.2 (mean diameter) for E. separigata. In relative comparison, E. orientalis-sachalinensis was estimated to be rheophobic, eurybathophilic, and eurypsephophilic; E. strigata to be euryrheophilic, bathophobic, and lithophilic; E. separigata to be stenomesorheophilic, stenobathophobic, stenolithophilic.

주제어

표/그림 (20)

그림 Fig. 1. Distribution type of aquatic organisms according to environmental factors; a) with dummy, b) shifted, c) with zero value, d) without zero value.
표 Table 1. Probability density function (PDF), cumulative distribution function (CDF), mode, mean, and variance according to environmental variable (x)
그림 Fig. 2. Cumulative mass function based on composite frequency of each taxon according to water depth gradient, probability density function and cumulative distribution function of the best-fit model; a) E. orientalis-sachalinensis, b) E. strigata, c) E. separigata, d) all taxa.
표 Table 2. Normalized root mean squared error (%) between cumulative mass function based on composite frequency of each taxon according to water depth gradient and cumulative distribution function of each model
그림 Fig. 3. Habitat suitability index of Ephemera species for water depth gradient; a) E. orientalis-sachalinensis, b) E. strigata, c) E. separigata, d) all taxa.
표 Table 3. Best-fit probability distribution models and model statistics for water depth gradient of each taxon
그림 Fig. 4. Cumulative mass function based on composite frequency of each taxon according to current velocity gradient, probability density function, and cumulative distribution function of the best-fit model; a) E. orientalis-sachalinensis, b) E. strigata, c) E. separigata, d) all taxa.
표 Table 4. Habitat suitability range of Ephemera species for water depth
표 Table 5. Normalized root mean squared error (%) between cumulative mass function based on composite frequency of each taxon according to current velocity gradient and cumulative distribution function of each model
그림 Fig. 5. Habitat suitability index of Ephemera species for current velocity gradient; a) E. orientalis-sachalinensis, b) E. strigata, c) E. separigata, d) all taxa.
표 Table 6. Best-fit probability distribution models and model statistics for current velocity gradient of each taxon
표 Table 7. Habitat suitability range of Ephemera species for current velocity
그림 Fig. 6. Substrate types of sampling units; a) Sites that E. orientalis-sachalinensis occurred, b) Sites that E. strigata occurred, c) Sites that E. separigata occurred, d) all sites.
그림 Fig. 7. Relative composite frequency of Ephemera species according to substrate types of sampling units.
그림 Fig. 8. Cumulative mass function based on composite frequency of each taxon according to mean diameter gradient of substrate grain, probability density function and cumulative distribution function of the best-fit model; a) E. orientalis-sachalinensis, b) E. strigata, c) E. separigata, d) all taxa.
표 Table 8. Normalized root mean squared error (%) between cumulative mass function based on composite frequency of each taxon according to mean diameter gradient of substrate grain and cumulative distribution function of each model
그림 Fig. 9. Habitat suitability index Ephemera species for mean diameter gradient of substrate; a) E. orientalis-sachalinensis, b) E. strigata, c) E. separigata, d) all taxa.
표 Table 9. Best-fit probability distribution models and model statistics for mean diameter gradient of substrate grain of each taxon
표 Table 10. Habitat suitability range Ephemera species for mean diameter of substrate grain.
그림 Fig. 10. Cumulative mass function based on composite frequency of each taxon according to mean diameter gradient of substrate grain, probability density function and cumulative distribution function of the best-fit model; a) E. orientalis-sachalinensis, b) E. strigata, c) E. separigata, d) all taxa.

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