Species and Functional Dynamics of the Demersal Fish Community and Responses to Disturbances in the Pearl River Estuary
Fishery resources are threatened by environmental changes and anthropogenic pressures, particularly in coastal ecosystems. It is crucial to understand the changes of fish communities and their responses to environmental changes and human disturbances to formulate rational fisheries and ecosystem-bas...
| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-07-01
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| Series: | Frontiers in Marine Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fmars.2022.921595/full |
| _version_ | 1818532081861394432 |
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| author | Zeyu Zeng William W. L. Cheung Han Lai Huadong Yi Sheng Bi Haiyang Li Xiaoli Chen Yuqin Su Xuange Liu Qiuxian Chen Zhilun Zhang Xuchong Wei Jiahui Chen Guifeng Li |
| author_facet | Zeyu Zeng William W. L. Cheung Han Lai Huadong Yi Sheng Bi Haiyang Li Xiaoli Chen Yuqin Su Xuange Liu Qiuxian Chen Zhilun Zhang Xuchong Wei Jiahui Chen Guifeng Li |
| author_sort | Zeyu Zeng |
| collection | DOAJ |
| description | Fishery resources are threatened by environmental changes and anthropogenic pressures, particularly in coastal ecosystems. It is crucial to understand the changes of fish communities and their responses to environmental changes and human disturbances to formulate rational fisheries and ecosystem-based management. The Pearl River Estuary (PRE) is a typical sub-tropic coastal ecosystem located in the center of the Guangdong-Hong Kong-Macao Greater Bay Area in the northern South China Sea. The demersal fish in the PRE is traditionally targeted as commercial fishing and severely impacted by overexploitation and hypoxia in the last few decades. In this study, we analyze the fish survey data during the period of 2020~2021 using multivariate statistics to investigate the impacts of human disturbances on the species and functional dynamics of the demersal fish community in the PRE. The results reveal that dissolved oxygen and temperature have significant correlations with the functional traits of the demersal fish community. The impacts of hypoxia on the demersal fish vary with species and locations. We found that the mean functional redundancy of the demersal fish community in the PRE was high across three surveys, but the functional diversity was low in this region. The abundance and richness of the demersal fish community increased during the summer fishing moratorium in the South China Sea in 2021, but the functional diversity did not increase significantly. We conclude that the high functional redundancy in the PRE might not be sufficient to buffer against environmental disturbances because of its low functional diversity. Our study highlights the complicated interactions between the demersal fish community and disturbances in the PRE. Understanding the traits structure and functional diversity of the fish community can help elucidate the factors determining the dynamic responses of the fish community to disturbances. |
| first_indexed | 2024-12-11T17:40:53Z |
| format | Article |
| id | doaj.art-27dece80d76c4058ab1df98c97350c7f |
| institution | Directory Open Access Journal |
| issn | 2296-7745 |
| language | English |
| last_indexed | 2024-12-11T17:40:53Z |
| publishDate | 2022-07-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj.art-27dece80d76c4058ab1df98c97350c7f2022-12-22T00:56:31ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452022-07-01910.3389/fmars.2022.921595921595Species and Functional Dynamics of the Demersal Fish Community and Responses to Disturbances in the Pearl River EstuaryZeyu Zeng0William W. L. Cheung1Han Lai2Huadong Yi3Sheng Bi4Haiyang Li5Xiaoli Chen6Yuqin Su7Xuange Liu8Qiuxian Chen9Zhilun Zhang10Xuchong Wei11Jiahui Chen12Guifeng Li13State Key Laboratory of Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-Sen University, Guangzhou, ChinaInstitute for the Oceans and Fisheries, The University of British Columbia, Vancouver, BC, CanadaState Key Laboratory of Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-Sen University, Guangzhou, ChinaState Key Laboratory of Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-Sen University, Guangzhou, ChinaState Key Laboratory of Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-Sen University, Guangzhou, ChinaState Key Laboratory of Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-Sen University, Guangzhou, ChinaState Key Laboratory of Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-Sen University, Guangzhou, ChinaState Key Laboratory of Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-Sen University, Guangzhou, ChinaState Key Laboratory of Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-Sen University, Guangzhou, ChinaState Key Laboratory of Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-Sen University, Guangzhou, ChinaState Key Laboratory of Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-Sen University, Guangzhou, ChinaState Key Laboratory of Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-Sen University, Guangzhou, ChinaState Key Laboratory of Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-Sen University, Guangzhou, ChinaState Key Laboratory of Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-Sen University, Guangzhou, ChinaFishery resources are threatened by environmental changes and anthropogenic pressures, particularly in coastal ecosystems. It is crucial to understand the changes of fish communities and their responses to environmental changes and human disturbances to formulate rational fisheries and ecosystem-based management. The Pearl River Estuary (PRE) is a typical sub-tropic coastal ecosystem located in the center of the Guangdong-Hong Kong-Macao Greater Bay Area in the northern South China Sea. The demersal fish in the PRE is traditionally targeted as commercial fishing and severely impacted by overexploitation and hypoxia in the last few decades. In this study, we analyze the fish survey data during the period of 2020~2021 using multivariate statistics to investigate the impacts of human disturbances on the species and functional dynamics of the demersal fish community in the PRE. The results reveal that dissolved oxygen and temperature have significant correlations with the functional traits of the demersal fish community. The impacts of hypoxia on the demersal fish vary with species and locations. We found that the mean functional redundancy of the demersal fish community in the PRE was high across three surveys, but the functional diversity was low in this region. The abundance and richness of the demersal fish community increased during the summer fishing moratorium in the South China Sea in 2021, but the functional diversity did not increase significantly. We conclude that the high functional redundancy in the PRE might not be sufficient to buffer against environmental disturbances because of its low functional diversity. Our study highlights the complicated interactions between the demersal fish community and disturbances in the PRE. Understanding the traits structure and functional diversity of the fish community can help elucidate the factors determining the dynamic responses of the fish community to disturbances.https://www.frontiersin.org/articles/10.3389/fmars.2022.921595/fulldemersal fish communityfunctional diversityfunctional redundancyhypoxiaPearl River Estuary (PRE) |
| spellingShingle | Zeyu Zeng William W. L. Cheung Han Lai Huadong Yi Sheng Bi Haiyang Li Xiaoli Chen Yuqin Su Xuange Liu Qiuxian Chen Zhilun Zhang Xuchong Wei Jiahui Chen Guifeng Li Species and Functional Dynamics of the Demersal Fish Community and Responses to Disturbances in the Pearl River Estuary Frontiers in Marine Science demersal fish community functional diversity functional redundancy hypoxia Pearl River Estuary (PRE) |
| title | Species and Functional Dynamics of the Demersal Fish Community and Responses to Disturbances in the Pearl River Estuary |
| title_full | Species and Functional Dynamics of the Demersal Fish Community and Responses to Disturbances in the Pearl River Estuary |
| title_fullStr | Species and Functional Dynamics of the Demersal Fish Community and Responses to Disturbances in the Pearl River Estuary |
| title_full_unstemmed | Species and Functional Dynamics of the Demersal Fish Community and Responses to Disturbances in the Pearl River Estuary |
| title_short | Species and Functional Dynamics of the Demersal Fish Community and Responses to Disturbances in the Pearl River Estuary |
| title_sort | species and functional dynamics of the demersal fish community and responses to disturbances in the pearl river estuary |
| topic | demersal fish community functional diversity functional redundancy hypoxia Pearl River Estuary (PRE) |
| url | https://www.frontiersin.org/articles/10.3389/fmars.2022.921595/full |
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