Spatiotemporal Variation Analyses of Water Quality, Fish Ecological Guilds, and the Longitudinal Connectivity in Musim Stream

The main objectives of this study were to analyze the spatiotemporal variations of water quality, fish ecological guilds and longitudinal connectivity in the weirs of Musim Stream. Fish were collected at 44 sites during spring and fall seasons for the analysis of trophic guilds, tolerance guilds, an...
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Autor*in:	Min Jae Cho [verfasserIn] Ji Yoon Kim [verfasserIn] Sang-Hyeon Jin [verfasserIn] Hyeji Choi [verfasserIn] Hyuk Je Lee [verfasserIn] Seo Jin Ki [verfasserIn] Dae-Yeul Bae [verfasserIn] Kwang-Guk An [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch ; Koreanisch

Erschienen:	2024

Schlagwörter:	artificial structure longitudinal connectivity fish fauna trophic guilds tolerance guilds

Übergeordnetes Werk:	In: 대한환경공학회지 - Korean Society of Environmental Engineers, 2020, 46(2024), 2, Seite 23-32
Übergeordnetes Werk:	volume:46 ; year:2024 ; number:2 ; pages:23-32

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc Journal toc

DOI / URN:	10.4491/KSEE.2024.46.2.23

Katalog-ID:	DOAJ095566449

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520			\|a The main objectives of this study were to analyze the spatiotemporal variations of water quality, fish ecological guilds and longitudinal connectivity in the weirs of Musim Stream. Fish were collected at 44 sites during spring and fall seasons for the analysis of trophic guilds, tolerance guilds, and the ecological stream health, based on FAI model. Total 33 species were observed in the stream and the dominant species were Zacco platypus and Squalidus qracilis majimae. Mean values of BOD and COD, as an indicator of organic matter pollution, showed high in the drought spring and low in fall (post-monsoon season). Also, TP showed same pattern with the BOD and COD pattern. The hierarchical clustering, based on the fish compositions, classified as three groups (up-stream, mid-stream and the down-stream). Based on the NMDS (Non-metric Multidimensional Scaling) analysis of fish abundance, high similarity was observed between S1-S5 sites, which were consistent with the results of hierarchical cluster analysis. Fish ecological guilds in the upper stream showed a high similarity between the insectivore and sensitive species, while in the middle and lower reaches, high similarity was found between the omnivore and intermediate species. Evaluations of longitudinal connectivity, based on the structural and hydrological characteristics of the weir, indicated all disconnections by the weirs, except for S15, in the spring. Stream ecological health, based on the FAI model, was significantly (p < 0.05, n=37) influenced by the height of overflow (Hu1). Overall, our study suggests that the longitudinal connectivity, based on the weir structures, flow regime and fish swimming capacity, were blocked off by the weirs in the stream. The results provide valuable insights for securing river management strategies and served as the fundamental data for stream restoration in the future.
650		4	\|a artificial structure
650		4	\|a longitudinal connectivity
650		4	\|a fish fauna
650		4	\|a trophic guilds
650		4	\|a tolerance guilds
653		0	\|a Environmental engineering
700	0		\|a Ji Yoon Kim \|e verfasserin \|4 aut
700	0		\|a Sang-Hyeon Jin \|e verfasserin \|4 aut
700	0		\|a Hyeji Choi \|e verfasserin \|4 aut
700	0		\|a Hyuk Je Lee \|e verfasserin \|4 aut
700	0		\|a Seo Jin Ki \|e verfasserin \|4 aut
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700	0		\|a Kwang-Guk An \|e verfasserin \|4 aut
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allfields	10.4491/KSEE.2024.46.2.23 doi (DE-627)DOAJ095566449 (DE-599)DOAJ26b0db941d244abea1c51f02398575fa DE-627 ger DE-627 rakwb eng kor TA170-171 Min Jae Cho verfasserin aut Spatiotemporal Variation Analyses of Water Quality, Fish Ecological Guilds, and the Longitudinal Connectivity in Musim Stream 2024 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The main objectives of this study were to analyze the spatiotemporal variations of water quality, fish ecological guilds and longitudinal connectivity in the weirs of Musim Stream. Fish were collected at 44 sites during spring and fall seasons for the analysis of trophic guilds, tolerance guilds, and the ecological stream health, based on FAI model. Total 33 species were observed in the stream and the dominant species were Zacco platypus and Squalidus qracilis majimae. Mean values of BOD and COD, as an indicator of organic matter pollution, showed high in the drought spring and low in fall (post-monsoon season). Also, TP showed same pattern with the BOD and COD pattern. The hierarchical clustering, based on the fish compositions, classified as three groups (up-stream, mid-stream and the down-stream). Based on the NMDS (Non-metric Multidimensional Scaling) analysis of fish abundance, high similarity was observed between S1-S5 sites, which were consistent with the results of hierarchical cluster analysis. Fish ecological guilds in the upper stream showed a high similarity between the insectivore and sensitive species, while in the middle and lower reaches, high similarity was found between the omnivore and intermediate species. Evaluations of longitudinal connectivity, based on the structural and hydrological characteristics of the weir, indicated all disconnections by the weirs, except for S15, in the spring. Stream ecological health, based on the FAI model, was significantly (p < 0.05, n=37) influenced by the height of overflow (Hu1). Overall, our study suggests that the longitudinal connectivity, based on the weir structures, flow regime and fish swimming capacity, were blocked off by the weirs in the stream. The results provide valuable insights for securing river management strategies and served as the fundamental data for stream restoration in the future. artificial structure longitudinal connectivity fish fauna trophic guilds tolerance guilds Environmental engineering Ji Yoon Kim verfasserin aut Sang-Hyeon Jin verfasserin aut Hyeji Choi verfasserin aut Hyuk Je Lee verfasserin aut Seo Jin Ki verfasserin aut Dae-Yeul Bae verfasserin aut Kwang-Guk An verfasserin aut In 대한환경공학회지 Korean Society of Environmental Engineers, 2020 46(2024), 2, Seite 23-32 (DE-627)1760610364 23837810 nnns volume:46 year:2024 number:2 pages:23-32 https://doi.org/10.4491/KSEE.2024.46.2.23 kostenfrei https://doaj.org/article/26b0db941d244abea1c51f02398575fa kostenfrei http://www.jksee.or.kr/upload/pdf/KSEE-2024-46-2-23.pdf kostenfrei https://doaj.org/toc/1225-5025 Journal toc kostenfrei https://doaj.org/toc/2383-7810 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ AR 46 2024 2 23-32
spelling	10.4491/KSEE.2024.46.2.23 doi (DE-627)DOAJ095566449 (DE-599)DOAJ26b0db941d244abea1c51f02398575fa DE-627 ger DE-627 rakwb eng kor TA170-171 Min Jae Cho verfasserin aut Spatiotemporal Variation Analyses of Water Quality, Fish Ecological Guilds, and the Longitudinal Connectivity in Musim Stream 2024 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The main objectives of this study were to analyze the spatiotemporal variations of water quality, fish ecological guilds and longitudinal connectivity in the weirs of Musim Stream. Fish were collected at 44 sites during spring and fall seasons for the analysis of trophic guilds, tolerance guilds, and the ecological stream health, based on FAI model. Total 33 species were observed in the stream and the dominant species were Zacco platypus and Squalidus qracilis majimae. Mean values of BOD and COD, as an indicator of organic matter pollution, showed high in the drought spring and low in fall (post-monsoon season). Also, TP showed same pattern with the BOD and COD pattern. The hierarchical clustering, based on the fish compositions, classified as three groups (up-stream, mid-stream and the down-stream). Based on the NMDS (Non-metric Multidimensional Scaling) analysis of fish abundance, high similarity was observed between S1-S5 sites, which were consistent with the results of hierarchical cluster analysis. Fish ecological guilds in the upper stream showed a high similarity between the insectivore and sensitive species, while in the middle and lower reaches, high similarity was found between the omnivore and intermediate species. Evaluations of longitudinal connectivity, based on the structural and hydrological characteristics of the weir, indicated all disconnections by the weirs, except for S15, in the spring. Stream ecological health, based on the FAI model, was significantly (p < 0.05, n=37) influenced by the height of overflow (Hu1). Overall, our study suggests that the longitudinal connectivity, based on the weir structures, flow regime and fish swimming capacity, were blocked off by the weirs in the stream. The results provide valuable insights for securing river management strategies and served as the fundamental data for stream restoration in the future. artificial structure longitudinal connectivity fish fauna trophic guilds tolerance guilds Environmental engineering Ji Yoon Kim verfasserin aut Sang-Hyeon Jin verfasserin aut Hyeji Choi verfasserin aut Hyuk Je Lee verfasserin aut Seo Jin Ki verfasserin aut Dae-Yeul Bae verfasserin aut Kwang-Guk An verfasserin aut In 대한환경공학회지 Korean Society of Environmental Engineers, 2020 46(2024), 2, Seite 23-32 (DE-627)1760610364 23837810 nnns volume:46 year:2024 number:2 pages:23-32 https://doi.org/10.4491/KSEE.2024.46.2.23 kostenfrei https://doaj.org/article/26b0db941d244abea1c51f02398575fa kostenfrei http://www.jksee.or.kr/upload/pdf/KSEE-2024-46-2-23.pdf kostenfrei https://doaj.org/toc/1225-5025 Journal toc kostenfrei https://doaj.org/toc/2383-7810 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ AR 46 2024 2 23-32
allfields_unstemmed	10.4491/KSEE.2024.46.2.23 doi (DE-627)DOAJ095566449 (DE-599)DOAJ26b0db941d244abea1c51f02398575fa DE-627 ger DE-627 rakwb eng kor TA170-171 Min Jae Cho verfasserin aut Spatiotemporal Variation Analyses of Water Quality, Fish Ecological Guilds, and the Longitudinal Connectivity in Musim Stream 2024 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The main objectives of this study were to analyze the spatiotemporal variations of water quality, fish ecological guilds and longitudinal connectivity in the weirs of Musim Stream. Fish were collected at 44 sites during spring and fall seasons for the analysis of trophic guilds, tolerance guilds, and the ecological stream health, based on FAI model. Total 33 species were observed in the stream and the dominant species were Zacco platypus and Squalidus qracilis majimae. Mean values of BOD and COD, as an indicator of organic matter pollution, showed high in the drought spring and low in fall (post-monsoon season). Also, TP showed same pattern with the BOD and COD pattern. The hierarchical clustering, based on the fish compositions, classified as three groups (up-stream, mid-stream and the down-stream). Based on the NMDS (Non-metric Multidimensional Scaling) analysis of fish abundance, high similarity was observed between S1-S5 sites, which were consistent with the results of hierarchical cluster analysis. Fish ecological guilds in the upper stream showed a high similarity between the insectivore and sensitive species, while in the middle and lower reaches, high similarity was found between the omnivore and intermediate species. Evaluations of longitudinal connectivity, based on the structural and hydrological characteristics of the weir, indicated all disconnections by the weirs, except for S15, in the spring. Stream ecological health, based on the FAI model, was significantly (p < 0.05, n=37) influenced by the height of overflow (Hu1). Overall, our study suggests that the longitudinal connectivity, based on the weir structures, flow regime and fish swimming capacity, were blocked off by the weirs in the stream. The results provide valuable insights for securing river management strategies and served as the fundamental data for stream restoration in the future. artificial structure longitudinal connectivity fish fauna trophic guilds tolerance guilds Environmental engineering Ji Yoon Kim verfasserin aut Sang-Hyeon Jin verfasserin aut Hyeji Choi verfasserin aut Hyuk Je Lee verfasserin aut Seo Jin Ki verfasserin aut Dae-Yeul Bae verfasserin aut Kwang-Guk An verfasserin aut In 대한환경공학회지 Korean Society of Environmental Engineers, 2020 46(2024), 2, Seite 23-32 (DE-627)1760610364 23837810 nnns volume:46 year:2024 number:2 pages:23-32 https://doi.org/10.4491/KSEE.2024.46.2.23 kostenfrei https://doaj.org/article/26b0db941d244abea1c51f02398575fa kostenfrei http://www.jksee.or.kr/upload/pdf/KSEE-2024-46-2-23.pdf kostenfrei https://doaj.org/toc/1225-5025 Journal toc kostenfrei https://doaj.org/toc/2383-7810 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ AR 46 2024 2 23-32
allfieldsGer	10.4491/KSEE.2024.46.2.23 doi (DE-627)DOAJ095566449 (DE-599)DOAJ26b0db941d244abea1c51f02398575fa DE-627 ger DE-627 rakwb eng kor TA170-171 Min Jae Cho verfasserin aut Spatiotemporal Variation Analyses of Water Quality, Fish Ecological Guilds, and the Longitudinal Connectivity in Musim Stream 2024 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The main objectives of this study were to analyze the spatiotemporal variations of water quality, fish ecological guilds and longitudinal connectivity in the weirs of Musim Stream. Fish were collected at 44 sites during spring and fall seasons for the analysis of trophic guilds, tolerance guilds, and the ecological stream health, based on FAI model. Total 33 species were observed in the stream and the dominant species were Zacco platypus and Squalidus qracilis majimae. Mean values of BOD and COD, as an indicator of organic matter pollution, showed high in the drought spring and low in fall (post-monsoon season). Also, TP showed same pattern with the BOD and COD pattern. The hierarchical clustering, based on the fish compositions, classified as three groups (up-stream, mid-stream and the down-stream). Based on the NMDS (Non-metric Multidimensional Scaling) analysis of fish abundance, high similarity was observed between S1-S5 sites, which were consistent with the results of hierarchical cluster analysis. Fish ecological guilds in the upper stream showed a high similarity between the insectivore and sensitive species, while in the middle and lower reaches, high similarity was found between the omnivore and intermediate species. Evaluations of longitudinal connectivity, based on the structural and hydrological characteristics of the weir, indicated all disconnections by the weirs, except for S15, in the spring. Stream ecological health, based on the FAI model, was significantly (p < 0.05, n=37) influenced by the height of overflow (Hu1). Overall, our study suggests that the longitudinal connectivity, based on the weir structures, flow regime and fish swimming capacity, were blocked off by the weirs in the stream. The results provide valuable insights for securing river management strategies and served as the fundamental data for stream restoration in the future. artificial structure longitudinal connectivity fish fauna trophic guilds tolerance guilds Environmental engineering Ji Yoon Kim verfasserin aut Sang-Hyeon Jin verfasserin aut Hyeji Choi verfasserin aut Hyuk Je Lee verfasserin aut Seo Jin Ki verfasserin aut Dae-Yeul Bae verfasserin aut Kwang-Guk An verfasserin aut In 대한환경공학회지 Korean Society of Environmental Engineers, 2020 46(2024), 2, Seite 23-32 (DE-627)1760610364 23837810 nnns volume:46 year:2024 number:2 pages:23-32 https://doi.org/10.4491/KSEE.2024.46.2.23 kostenfrei https://doaj.org/article/26b0db941d244abea1c51f02398575fa kostenfrei http://www.jksee.or.kr/upload/pdf/KSEE-2024-46-2-23.pdf kostenfrei https://doaj.org/toc/1225-5025 Journal toc kostenfrei https://doaj.org/toc/2383-7810 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ AR 46 2024 2 23-32
allfieldsSound	10.4491/KSEE.2024.46.2.23 doi (DE-627)DOAJ095566449 (DE-599)DOAJ26b0db941d244abea1c51f02398575fa DE-627 ger DE-627 rakwb eng kor TA170-171 Min Jae Cho verfasserin aut Spatiotemporal Variation Analyses of Water Quality, Fish Ecological Guilds, and the Longitudinal Connectivity in Musim Stream 2024 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The main objectives of this study were to analyze the spatiotemporal variations of water quality, fish ecological guilds and longitudinal connectivity in the weirs of Musim Stream. Fish were collected at 44 sites during spring and fall seasons for the analysis of trophic guilds, tolerance guilds, and the ecological stream health, based on FAI model. Total 33 species were observed in the stream and the dominant species were Zacco platypus and Squalidus qracilis majimae. Mean values of BOD and COD, as an indicator of organic matter pollution, showed high in the drought spring and low in fall (post-monsoon season). Also, TP showed same pattern with the BOD and COD pattern. The hierarchical clustering, based on the fish compositions, classified as three groups (up-stream, mid-stream and the down-stream). Based on the NMDS (Non-metric Multidimensional Scaling) analysis of fish abundance, high similarity was observed between S1-S5 sites, which were consistent with the results of hierarchical cluster analysis. Fish ecological guilds in the upper stream showed a high similarity between the insectivore and sensitive species, while in the middle and lower reaches, high similarity was found between the omnivore and intermediate species. Evaluations of longitudinal connectivity, based on the structural and hydrological characteristics of the weir, indicated all disconnections by the weirs, except for S15, in the spring. Stream ecological health, based on the FAI model, was significantly (p < 0.05, n=37) influenced by the height of overflow (Hu1). Overall, our study suggests that the longitudinal connectivity, based on the weir structures, flow regime and fish swimming capacity, were blocked off by the weirs in the stream. The results provide valuable insights for securing river management strategies and served as the fundamental data for stream restoration in the future. artificial structure longitudinal connectivity fish fauna trophic guilds tolerance guilds Environmental engineering Ji Yoon Kim verfasserin aut Sang-Hyeon Jin verfasserin aut Hyeji Choi verfasserin aut Hyuk Je Lee verfasserin aut Seo Jin Ki verfasserin aut Dae-Yeul Bae verfasserin aut Kwang-Guk An verfasserin aut In 대한환경공학회지 Korean Society of Environmental Engineers, 2020 46(2024), 2, Seite 23-32 (DE-627)1760610364 23837810 nnns volume:46 year:2024 number:2 pages:23-32 https://doi.org/10.4491/KSEE.2024.46.2.23 kostenfrei https://doaj.org/article/26b0db941d244abea1c51f02398575fa kostenfrei http://www.jksee.or.kr/upload/pdf/KSEE-2024-46-2-23.pdf kostenfrei https://doaj.org/toc/1225-5025 Journal toc kostenfrei https://doaj.org/toc/2383-7810 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ AR 46 2024 2 23-32
language	English Korean
source	In 대한환경공학회지 46(2024), 2, Seite 23-32 volume:46 year:2024 number:2 pages:23-32
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format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	artificial structure longitudinal connectivity fish fauna trophic guilds tolerance guilds Environmental engineering
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container_title	대한환경공학회지
authorswithroles_txt_mv	Min Jae Cho @@aut@@ Ji Yoon Kim @@aut@@ Sang-Hyeon Jin @@aut@@ Hyeji Choi @@aut@@ Hyuk Je Lee @@aut@@ Seo Jin Ki @@aut@@ Dae-Yeul Bae @@aut@@ Kwang-Guk An @@aut@@
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Fish were collected at 44 sites during spring and fall seasons for the analysis of trophic guilds, tolerance guilds, and the ecological stream health, based on FAI model. Total 33 species were observed in the stream and the dominant species were Zacco platypus and Squalidus qracilis majimae. Mean values of BOD and COD, as an indicator of organic matter pollution, showed high in the drought spring and low in fall (post-monsoon season). Also, TP showed same pattern with the BOD and COD pattern. The hierarchical clustering, based on the fish compositions, classified as three groups (up-stream, mid-stream and the down-stream). Based on the NMDS (Non-metric Multidimensional Scaling) analysis of fish abundance, high similarity was observed between S1-S5 sites, which were consistent with the results of hierarchical cluster analysis. Fish ecological guilds in the upper stream showed a high similarity between the insectivore and sensitive species, while in the middle and lower reaches, high similarity was found between the omnivore and intermediate species. Evaluations of longitudinal connectivity, based on the structural and hydrological characteristics of the weir, indicated all disconnections by the weirs, except for S15, in the spring. Stream ecological health, based on the FAI model, was significantly (p < 0.05, n=37) influenced by the height of overflow (Hu1). Overall, our study suggests that the longitudinal connectivity, based on the weir structures, flow regime and fish swimming capacity, were blocked off by the weirs in the stream. 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callnumber-first	T - Technology
author	Min Jae Cho
spellingShingle	Min Jae Cho misc TA170-171 misc artificial structure misc longitudinal connectivity misc fish fauna misc trophic guilds misc tolerance guilds misc Environmental engineering Spatiotemporal Variation Analyses of Water Quality, Fish Ecological Guilds, and the Longitudinal Connectivity in Musim Stream
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topic_title	TA170-171 Spatiotemporal Variation Analyses of Water Quality, Fish Ecological Guilds, and the Longitudinal Connectivity in Musim Stream artificial structure longitudinal connectivity fish fauna trophic guilds tolerance guilds
topic	misc TA170-171 misc artificial structure misc longitudinal connectivity misc fish fauna misc trophic guilds misc tolerance guilds misc Environmental engineering
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title	Spatiotemporal Variation Analyses of Water Quality, Fish Ecological Guilds, and the Longitudinal Connectivity in Musim Stream
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title_full	Spatiotemporal Variation Analyses of Water Quality, Fish Ecological Guilds, and the Longitudinal Connectivity in Musim Stream
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title_sort	spatiotemporal variation analyses of water quality, fish ecological guilds, and the longitudinal connectivity in musim stream
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title_auth	Spatiotemporal Variation Analyses of Water Quality, Fish Ecological Guilds, and the Longitudinal Connectivity in Musim Stream
abstract	The main objectives of this study were to analyze the spatiotemporal variations of water quality, fish ecological guilds and longitudinal connectivity in the weirs of Musim Stream. Fish were collected at 44 sites during spring and fall seasons for the analysis of trophic guilds, tolerance guilds, and the ecological stream health, based on FAI model. Total 33 species were observed in the stream and the dominant species were Zacco platypus and Squalidus qracilis majimae. Mean values of BOD and COD, as an indicator of organic matter pollution, showed high in the drought spring and low in fall (post-monsoon season). Also, TP showed same pattern with the BOD and COD pattern. The hierarchical clustering, based on the fish compositions, classified as three groups (up-stream, mid-stream and the down-stream). Based on the NMDS (Non-metric Multidimensional Scaling) analysis of fish abundance, high similarity was observed between S1-S5 sites, which were consistent with the results of hierarchical cluster analysis. Fish ecological guilds in the upper stream showed a high similarity between the insectivore and sensitive species, while in the middle and lower reaches, high similarity was found between the omnivore and intermediate species. Evaluations of longitudinal connectivity, based on the structural and hydrological characteristics of the weir, indicated all disconnections by the weirs, except for S15, in the spring. Stream ecological health, based on the FAI model, was significantly (p < 0.05, n=37) influenced by the height of overflow (Hu1). Overall, our study suggests that the longitudinal connectivity, based on the weir structures, flow regime and fish swimming capacity, were blocked off by the weirs in the stream. The results provide valuable insights for securing river management strategies and served as the fundamental data for stream restoration in the future.
abstractGer	The main objectives of this study were to analyze the spatiotemporal variations of water quality, fish ecological guilds and longitudinal connectivity in the weirs of Musim Stream. Fish were collected at 44 sites during spring and fall seasons for the analysis of trophic guilds, tolerance guilds, and the ecological stream health, based on FAI model. Total 33 species were observed in the stream and the dominant species were Zacco platypus and Squalidus qracilis majimae. Mean values of BOD and COD, as an indicator of organic matter pollution, showed high in the drought spring and low in fall (post-monsoon season). Also, TP showed same pattern with the BOD and COD pattern. The hierarchical clustering, based on the fish compositions, classified as three groups (up-stream, mid-stream and the down-stream). Based on the NMDS (Non-metric Multidimensional Scaling) analysis of fish abundance, high similarity was observed between S1-S5 sites, which were consistent with the results of hierarchical cluster analysis. Fish ecological guilds in the upper stream showed a high similarity between the insectivore and sensitive species, while in the middle and lower reaches, high similarity was found between the omnivore and intermediate species. Evaluations of longitudinal connectivity, based on the structural and hydrological characteristics of the weir, indicated all disconnections by the weirs, except for S15, in the spring. Stream ecological health, based on the FAI model, was significantly (p < 0.05, n=37) influenced by the height of overflow (Hu1). Overall, our study suggests that the longitudinal connectivity, based on the weir structures, flow regime and fish swimming capacity, were blocked off by the weirs in the stream. The results provide valuable insights for securing river management strategies and served as the fundamental data for stream restoration in the future.
abstract_unstemmed	The main objectives of this study were to analyze the spatiotemporal variations of water quality, fish ecological guilds and longitudinal connectivity in the weirs of Musim Stream. Fish were collected at 44 sites during spring and fall seasons for the analysis of trophic guilds, tolerance guilds, and the ecological stream health, based on FAI model. Total 33 species were observed in the stream and the dominant species were Zacco platypus and Squalidus qracilis majimae. Mean values of BOD and COD, as an indicator of organic matter pollution, showed high in the drought spring and low in fall (post-monsoon season). Also, TP showed same pattern with the BOD and COD pattern. The hierarchical clustering, based on the fish compositions, classified as three groups (up-stream, mid-stream and the down-stream). Based on the NMDS (Non-metric Multidimensional Scaling) analysis of fish abundance, high similarity was observed between S1-S5 sites, which were consistent with the results of hierarchical cluster analysis. Fish ecological guilds in the upper stream showed a high similarity between the insectivore and sensitive species, while in the middle and lower reaches, high similarity was found between the omnivore and intermediate species. Evaluations of longitudinal connectivity, based on the structural and hydrological characteristics of the weir, indicated all disconnections by the weirs, except for S15, in the spring. Stream ecological health, based on the FAI model, was significantly (p < 0.05, n=37) influenced by the height of overflow (Hu1). Overall, our study suggests that the longitudinal connectivity, based on the weir structures, flow regime and fish swimming capacity, were blocked off by the weirs in the stream. The results provide valuable insights for securing river management strategies and served as the fundamental data for stream restoration in the future.
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title_short	Spatiotemporal Variation Analyses of Water Quality, Fish Ecological Guilds, and the Longitudinal Connectivity in Musim Stream
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