The Resource Status of Plankton after Stocked <i>Protosalanx chinensis</i> Population Collapse in a Lake of Northeastern China
In order to understand the relative strength of top-down and bottom-up control in lakes of grazing alien fish, <i>Protosalanx chinensis,</i> investigations were designed in Lake Longhu (Lake L, <i>P. chinensis</i> introduced in 2013) and Lake Qijia (Lake Q, <i>P. chinen...
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MDPI AG
2023-05-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/15/10/1854 |
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| author | Zhe Li Ying Han Fujiang Tang Haoyu Zeng Yi Zheng |
| author_facet | Zhe Li Ying Han Fujiang Tang Haoyu Zeng Yi Zheng |
| author_sort | Zhe Li |
| collection | DOAJ |
| description | In order to understand the relative strength of top-down and bottom-up control in lakes of grazing alien fish, <i>Protosalanx chinensis,</i> investigations were designed in Lake Longhu (Lake L, <i>P. chinensis</i> introduced in 2013) and Lake Qijia (Lake Q, <i>P. chinensis</i> free). Plankton samples were collected bimonthly through the whole life cycle of <i>P. chinensis</i> (from February to December in 2018). A total of 133 phytoplankton and 68 zooplankton species were recorded in the two lakes. The total density and biomass of phytoplankton and zooplankton were 991.89 × 10<sup>4</sup> ind/L and 9.2418 mg/L as well as 5212 ind/L and 20.2646 mg/L, respectively. This study revealed that <i>P. chinensis</i> grazing did not deplete the zooplankton resources in the lake where it was stocked. Biodiversity in Lake L was not significantly different from that in Lake Q based on both phytoplankton and zooplankton. Overall, the over grazing of <i>P. chinensis</i> was not found in Lake L. Nevertheless, compared to Lake Q, the correlation between phytoplankton and zooplankton was weakened in Lake L, which meant there were still some effects of stocking <i>P. chinensis</i> on the ecological equilibrium of the plankton community, although no dramatic influences were found in Lake L yet. We also found that <i>P. chinensis</i> and Cladocera were significantly correlated, which should account for the top-down influences. Long-term successive investigations are suggested for sustainable resource utilization and maintaining biological balance. |
| first_indexed | 2024-03-11T03:13:22Z |
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| language | English |
| last_indexed | 2024-03-11T03:13:22Z |
| publishDate | 2023-05-01 |
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| series | Water |
| spelling | doaj.art-5d0cf40ad1614e5ab094ef43974003352023-11-18T03:41:25ZengMDPI AGWater2073-44412023-05-011510185410.3390/w15101854The Resource Status of Plankton after Stocked <i>Protosalanx chinensis</i> Population Collapse in a Lake of Northeastern ChinaZhe Li0Ying Han1Fujiang Tang2Haoyu Zeng3Yi Zheng4College of Animal Science and Technology, Northeast Agricultural University, No. 600, Changjiang Road, Xiangfang District, Harbin 150030, ChinaCollege of Animal Science and Technology, Northeast Agricultural University, No. 600, Changjiang Road, Xiangfang District, Harbin 150030, ChinaHeilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, ChinaHeilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, ChinaHeilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, ChinaIn order to understand the relative strength of top-down and bottom-up control in lakes of grazing alien fish, <i>Protosalanx chinensis,</i> investigations were designed in Lake Longhu (Lake L, <i>P. chinensis</i> introduced in 2013) and Lake Qijia (Lake Q, <i>P. chinensis</i> free). Plankton samples were collected bimonthly through the whole life cycle of <i>P. chinensis</i> (from February to December in 2018). A total of 133 phytoplankton and 68 zooplankton species were recorded in the two lakes. The total density and biomass of phytoplankton and zooplankton were 991.89 × 10<sup>4</sup> ind/L and 9.2418 mg/L as well as 5212 ind/L and 20.2646 mg/L, respectively. This study revealed that <i>P. chinensis</i> grazing did not deplete the zooplankton resources in the lake where it was stocked. Biodiversity in Lake L was not significantly different from that in Lake Q based on both phytoplankton and zooplankton. Overall, the over grazing of <i>P. chinensis</i> was not found in Lake L. Nevertheless, compared to Lake Q, the correlation between phytoplankton and zooplankton was weakened in Lake L, which meant there were still some effects of stocking <i>P. chinensis</i> on the ecological equilibrium of the plankton community, although no dramatic influences were found in Lake L yet. We also found that <i>P. chinensis</i> and Cladocera were significantly correlated, which should account for the top-down influences. Long-term successive investigations are suggested for sustainable resource utilization and maintaining biological balance.https://www.mdpi.com/2073-4441/15/10/1854Cladoceraplanktivorezooplanktonphytoplankton |
| spellingShingle | Zhe Li Ying Han Fujiang Tang Haoyu Zeng Yi Zheng The Resource Status of Plankton after Stocked <i>Protosalanx chinensis</i> Population Collapse in a Lake of Northeastern China Water Cladocera planktivore zooplankton phytoplankton |
| title | The Resource Status of Plankton after Stocked <i>Protosalanx chinensis</i> Population Collapse in a Lake of Northeastern China |
| title_full | The Resource Status of Plankton after Stocked <i>Protosalanx chinensis</i> Population Collapse in a Lake of Northeastern China |
| title_fullStr | The Resource Status of Plankton after Stocked <i>Protosalanx chinensis</i> Population Collapse in a Lake of Northeastern China |
| title_full_unstemmed | The Resource Status of Plankton after Stocked <i>Protosalanx chinensis</i> Population Collapse in a Lake of Northeastern China |
| title_short | The Resource Status of Plankton after Stocked <i>Protosalanx chinensis</i> Population Collapse in a Lake of Northeastern China |
| title_sort | resource status of plankton after stocked i protosalanx chinensis i population collapse in a lake of northeastern china |
| topic | Cladocera planktivore zooplankton phytoplankton |
| url | https://www.mdpi.com/2073-4441/15/10/1854 |
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