Use of macrofaunal assemblage indices and biological trait analysis to assess the ecological impacts of coastal bivalve aquaculture
Coastal bivalve aquaculture is considered to have large impacts on the structure and functions of macrofauna assemblages. In the present study, we evaluated the macrofauna assemblages from 12 bivalve farms along the China coast using 11 compositional and functional indices and 15 biological traits w...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-08-01
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| Series: | Ecological Indicators |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1470160X21003782 |
| _version_ | 1818843765575516160 |
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| author | Xin Sun Jianyu Dong Chengye Hu Yuyang Zhang Yong Chen Xiumei Zhang |
| author_facet | Xin Sun Jianyu Dong Chengye Hu Yuyang Zhang Yong Chen Xiumei Zhang |
| author_sort | Xin Sun |
| collection | DOAJ |
| description | Coastal bivalve aquaculture is considered to have large impacts on the structure and functions of macrofauna assemblages. In the present study, we evaluated the macrofauna assemblages from 12 bivalve farms along the China coast using 11 compositional and functional indices and 15 biological traits within four major categories. Linear mixed models (LMMs) were used to identify the most influential variable on the selected indices. The RLQ and fourth-corner approaches were used to investigate the response of functional traits composition to the characteristics of bivalve farms. Our results suggest that the increased densities of cultured bivalve had a negative impact on the organisms sharing similar function traits but the ecosystem could still maintain the functional richness because those organisms were mainly on the redundant group, and their loss favored a more balanced distribution of taxa and biological traits. Additionally, biological trait compositions of macrofaunal assemblages were more similar within farms using the same culture method. Small-sized opportunistic deposit feeders were likely to appear in cage farms, and predators were more attracted by rope farms. In bottom-based bivalve farms, filter feeders dominated but carnivores and crawlers were significantly lower compared to the other culture methods. We conclude that functional redundancy is a critical indicator for identifying the suitable scale and intensity of bivalve aquaculture. From the perspective of maintaining biological traits, bottom-based culture causes less ecological impact compared to off-bottom culture, the latter is more suitable in areas with relatively deep water and strong current and water exchange rate. |
| first_indexed | 2024-12-19T05:03:04Z |
| format | Article |
| id | doaj.art-9c275261d3284d308bdb81681c578722 |
| institution | Directory Open Access Journal |
| issn | 1470-160X |
| language | English |
| last_indexed | 2024-12-19T05:03:04Z |
| publishDate | 2021-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecological Indicators |
| spelling | doaj.art-9c275261d3284d308bdb81681c5787222022-12-21T20:35:01ZengElsevierEcological Indicators1470-160X2021-08-01127107713Use of macrofaunal assemblage indices and biological trait analysis to assess the ecological impacts of coastal bivalve aquacultureXin Sun0Jianyu Dong1Chengye Hu2Yuyang Zhang3Yong Chen4Xiumei Zhang5The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, ChinaThe Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, ChinaFisheries College, Zhejiang Ocean University, Zhoushan 316022, ChinaThe Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, ChinaSchool of Marine Sciences, University of Maine, Orono, ME 04469, United StatesFisheries College, Zhejiang Ocean University, Zhoushan 316022, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China; Corresponding author at: Fisheries College, Zhejiang Ocean University, Zhoushan 316022, China.Coastal bivalve aquaculture is considered to have large impacts on the structure and functions of macrofauna assemblages. In the present study, we evaluated the macrofauna assemblages from 12 bivalve farms along the China coast using 11 compositional and functional indices and 15 biological traits within four major categories. Linear mixed models (LMMs) were used to identify the most influential variable on the selected indices. The RLQ and fourth-corner approaches were used to investigate the response of functional traits composition to the characteristics of bivalve farms. Our results suggest that the increased densities of cultured bivalve had a negative impact on the organisms sharing similar function traits but the ecosystem could still maintain the functional richness because those organisms were mainly on the redundant group, and their loss favored a more balanced distribution of taxa and biological traits. Additionally, biological trait compositions of macrofaunal assemblages were more similar within farms using the same culture method. Small-sized opportunistic deposit feeders were likely to appear in cage farms, and predators were more attracted by rope farms. In bottom-based bivalve farms, filter feeders dominated but carnivores and crawlers were significantly lower compared to the other culture methods. We conclude that functional redundancy is a critical indicator for identifying the suitable scale and intensity of bivalve aquaculture. From the perspective of maintaining biological traits, bottom-based culture causes less ecological impact compared to off-bottom culture, the latter is more suitable in areas with relatively deep water and strong current and water exchange rate.http://www.sciencedirect.com/science/article/pii/S1470160X21003782Macrofaunal assemblagesBivalve aquacultureDiversity indicesFunctional diversityBiological trait analysis |
| spellingShingle | Xin Sun Jianyu Dong Chengye Hu Yuyang Zhang Yong Chen Xiumei Zhang Use of macrofaunal assemblage indices and biological trait analysis to assess the ecological impacts of coastal bivalve aquaculture Ecological Indicators Macrofaunal assemblages Bivalve aquaculture Diversity indices Functional diversity Biological trait analysis |
| title | Use of macrofaunal assemblage indices and biological trait analysis to assess the ecological impacts of coastal bivalve aquaculture |
| title_full | Use of macrofaunal assemblage indices and biological trait analysis to assess the ecological impacts of coastal bivalve aquaculture |
| title_fullStr | Use of macrofaunal assemblage indices and biological trait analysis to assess the ecological impacts of coastal bivalve aquaculture |
| title_full_unstemmed | Use of macrofaunal assemblage indices and biological trait analysis to assess the ecological impacts of coastal bivalve aquaculture |
| title_short | Use of macrofaunal assemblage indices and biological trait analysis to assess the ecological impacts of coastal bivalve aquaculture |
| title_sort | use of macrofaunal assemblage indices and biological trait analysis to assess the ecological impacts of coastal bivalve aquaculture |
| topic | Macrofaunal assemblages Bivalve aquaculture Diversity indices Functional diversity Biological trait analysis |
| url | http://www.sciencedirect.com/science/article/pii/S1470160X21003782 |
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