The Effects of Intraguild Predation on Phytoplankton Assemblage Composition and Diversity: A Mesocosm Experiment
Intraguild predation (IGP) can have a significant impact on phytoplankton biomass, but its effects on their diversity and assemblage composition are not well understood. In this study, we constructed an IGP model based on the common three-trophic food chain of “fish (or shrimp)–large branchiopods (&...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-04-01
|
| Series: | Biology |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-7737/12/4/578 |
| _version_ | 1797606291032506368 |
|---|---|
| author | Jun Da Yilong Xi Yunshan Cheng Hu He Yanru Liu Huabing Li Qinglong L. Wu |
| author_facet | Jun Da Yilong Xi Yunshan Cheng Hu He Yanru Liu Huabing Li Qinglong L. Wu |
| author_sort | Jun Da |
| collection | DOAJ |
| description | Intraguild predation (IGP) can have a significant impact on phytoplankton biomass, but its effects on their diversity and assemblage composition are not well understood. In this study, we constructed an IGP model based on the common three-trophic food chain of “fish (or shrimp)–large branchiopods (<i>Daphnia</i>)–phytoplankton”, and investigated the effects of IGP on phytoplankton assemblage composition and diversity in outdoor mesocosms using environmental DNA high-throughput sequencing. Our results indicated that the alpha diversities (number of amplicon sequence variants and Faith’s phylogenetic diversity) of phytoplankton and the relative abundance of Chlorophyceae increased with the addition of <i>Pelteobagrus fulvidraco</i>, while similar trends were found in alpha diversities but with a decrease in the relative abundance of Chlorophyceae in the <i>Exopalaemon modestus</i> treatment. When both predators were added to the community, the strength of collective cascading effects on phytoplankton alpha diversities and assemblage composition were weaker than the sum of the individual predator effects. Network analysis further showed that this IGP effect also decreased the strength of collective cascading effects in reducing the complexity and stability of the phytoplankton assemblages. These findings contribute to a better understanding of the mechanisms underlying the impacts of IGP on lake biodiversity, and provide further knowledge relevant to lake management and conservation. |
| first_indexed | 2024-03-11T05:13:08Z |
| format | Article |
| id | doaj.art-7e6499f0b5ae470dbf350c983bae0fe9 |
| institution | Directory Open Access Journal |
| issn | 2079-7737 |
| language | English |
| last_indexed | 2024-03-11T05:13:08Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Biology |
| spelling | doaj.art-7e6499f0b5ae470dbf350c983bae0fe92023-11-17T18:24:12ZengMDPI AGBiology2079-77372023-04-0112457810.3390/biology12040578The Effects of Intraguild Predation on Phytoplankton Assemblage Composition and Diversity: A Mesocosm ExperimentJun Da0Yilong Xi1Yunshan Cheng2Hu He3Yanru Liu4Huabing Li5Qinglong L. Wu6School of Ecology and Environment, Anhui Normal University, Wuhu 050031, ChinaSchool of Ecology and Environment, Anhui Normal University, Wuhu 050031, ChinaSchool of Ecology and Environment, Anhui Normal University, Wuhu 050031, ChinaState Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, ChinaState Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, ChinaState Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, ChinaState Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, ChinaIntraguild predation (IGP) can have a significant impact on phytoplankton biomass, but its effects on their diversity and assemblage composition are not well understood. In this study, we constructed an IGP model based on the common three-trophic food chain of “fish (or shrimp)–large branchiopods (<i>Daphnia</i>)–phytoplankton”, and investigated the effects of IGP on phytoplankton assemblage composition and diversity in outdoor mesocosms using environmental DNA high-throughput sequencing. Our results indicated that the alpha diversities (number of amplicon sequence variants and Faith’s phylogenetic diversity) of phytoplankton and the relative abundance of Chlorophyceae increased with the addition of <i>Pelteobagrus fulvidraco</i>, while similar trends were found in alpha diversities but with a decrease in the relative abundance of Chlorophyceae in the <i>Exopalaemon modestus</i> treatment. When both predators were added to the community, the strength of collective cascading effects on phytoplankton alpha diversities and assemblage composition were weaker than the sum of the individual predator effects. Network analysis further showed that this IGP effect also decreased the strength of collective cascading effects in reducing the complexity and stability of the phytoplankton assemblages. These findings contribute to a better understanding of the mechanisms underlying the impacts of IGP on lake biodiversity, and provide further knowledge relevant to lake management and conservation.https://www.mdpi.com/2079-7737/12/4/578Intraguild predationenvironmental DNAfishshrimpphytoplanktondiversity |
| spellingShingle | Jun Da Yilong Xi Yunshan Cheng Hu He Yanru Liu Huabing Li Qinglong L. Wu The Effects of Intraguild Predation on Phytoplankton Assemblage Composition and Diversity: A Mesocosm Experiment Biology Intraguild predation environmental DNA fish shrimp phytoplankton diversity |
| title | The Effects of Intraguild Predation on Phytoplankton Assemblage Composition and Diversity: A Mesocosm Experiment |
| title_full | The Effects of Intraguild Predation on Phytoplankton Assemblage Composition and Diversity: A Mesocosm Experiment |
| title_fullStr | The Effects of Intraguild Predation on Phytoplankton Assemblage Composition and Diversity: A Mesocosm Experiment |
| title_full_unstemmed | The Effects of Intraguild Predation on Phytoplankton Assemblage Composition and Diversity: A Mesocosm Experiment |
| title_short | The Effects of Intraguild Predation on Phytoplankton Assemblage Composition and Diversity: A Mesocosm Experiment |
| title_sort | effects of intraguild predation on phytoplankton assemblage composition and diversity a mesocosm experiment |
| topic | Intraguild predation environmental DNA fish shrimp phytoplankton diversity |
| url | https://www.mdpi.com/2079-7737/12/4/578 |
| work_keys_str_mv | AT junda theeffectsofintraguildpredationonphytoplanktonassemblagecompositionanddiversityamesocosmexperiment AT yilongxi theeffectsofintraguildpredationonphytoplanktonassemblagecompositionanddiversityamesocosmexperiment AT yunshancheng theeffectsofintraguildpredationonphytoplanktonassemblagecompositionanddiversityamesocosmexperiment AT huhe theeffectsofintraguildpredationonphytoplanktonassemblagecompositionanddiversityamesocosmexperiment AT yanruliu theeffectsofintraguildpredationonphytoplanktonassemblagecompositionanddiversityamesocosmexperiment AT huabingli theeffectsofintraguildpredationonphytoplanktonassemblagecompositionanddiversityamesocosmexperiment AT qinglonglwu theeffectsofintraguildpredationonphytoplanktonassemblagecompositionanddiversityamesocosmexperiment AT junda effectsofintraguildpredationonphytoplanktonassemblagecompositionanddiversityamesocosmexperiment AT yilongxi effectsofintraguildpredationonphytoplanktonassemblagecompositionanddiversityamesocosmexperiment AT yunshancheng effectsofintraguildpredationonphytoplanktonassemblagecompositionanddiversityamesocosmexperiment AT huhe effectsofintraguildpredationonphytoplanktonassemblagecompositionanddiversityamesocosmexperiment AT yanruliu effectsofintraguildpredationonphytoplanktonassemblagecompositionanddiversityamesocosmexperiment AT huabingli effectsofintraguildpredationonphytoplanktonassemblagecompositionanddiversityamesocosmexperiment AT qinglonglwu effectsofintraguildpredationonphytoplanktonassemblagecompositionanddiversityamesocosmexperiment |