Development and testing of a planktonic index of biotic integrity (P-IBI) for Lake Fuxian, China

Ge, You; Gu, Xiaohong; Zeng, Qingfei; Mao, Zhigang; Chen, Huihui; Yang, Huiting

doi:10.1007/s11356-023-29818-6

Cited by 2 publications

(1 citation statement)

References 55 publications

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“…The evaluation results of Lake Gehu in the Yangtze River Delta showed that the P-IBI in dry and wet periods was consistent [38]. By conducting a seasonal assessment of the P-IBI while researching Fuxian Lake, the findings indicated that the biological integrity of Fuxian Lake was better during the winter and spring, but gradually declined during the summer and autumn [52]. The multimetric P-IBI was developed for Lake Erie through the monthly (May-September) analysis of plankton communities, providing a useful, large-scale method for monitoring water quality changes in offshore lakes [3].…”

Section: Spatiotemporal Changes In P-ibimentioning

confidence: 84%

Development and Evaluation of the Plankton Biological Integrity Index (P-IBI) in Dry and Wet Seasons for Dianchi Lake

Cao,

Liang,

Zhang

et al. 2024

Ecologies

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As an important component of lake ecosystems, plankton are often used as indicators to evaluate the health of aquatic ecosystems, such as lakes and reservoirs. The plankton integrity index (P-IBI) is a highly utilized method for evaluating the ecological health of the lakes. This study took Dianchi Lake, located in the Yangtze River Basin, as the research object and analyzed the phytoplankton, zooplankton communities, and environmental factors at 11 sampling points in this lake during the wet season (July) in 2022 and the dry season (February) in 2023. The P-IBI was established to evaluate the health status of this lake ecosystem. The results showed that a total of 83 species of phytoplankton and 31 species of zooplankton were identified in Dianchi Lake, and the number of plankton species in the dry season was significantly higher than that in the wet season. The P-IBI evaluation results for the two hydrological periods were generally “good”. Linear regression analysis showed that there was a certain negative correlation between the P-IBI value and the comprehensive trophic level index (TLI), and the evaluation results were generally in line with the actual situation of the water body. Redundancy analysis (RDA) showed that there was a significant correlation between the P-IBI and its constituent parameters and individual water quality environmental factors, such as total nitrogen (TN) and electrical conductivity (EC). In summary, by reducing errors caused by spatial and temporal changes across various hydrological periods, P-IBI represents a more scientifically rigorous technique for lake water ecological health assessments within a certain time range.

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Section: Spatiotemporal Changes In P-ibimentioning

confidence: 84%

Development and Evaluation of the Plankton Biological Integrity Index (P-IBI) in Dry and Wet Seasons for Dianchi Lake

Cao,

Liang,

Zhang

et al. 2024

Ecologies

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Functional diversity explores the maintenance mechanism and driving factors of the invasion equilibrium state of the icefish (Neosalanx taihuensis Chen) in Lake Fuxian, China

Ge,

Gu,

Zeng

et al. 2024

Journal of Fish Biology

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Biodiversity loss caused by biological invasions is an ecological problem on a global scale, and understanding the mechanism of biological invasion is the basis for managing non‐native species. The biotic resistance hypothesis proposes that species‐rich native communities are less susceptible to invasion because of the limited resources available to non‐native species, therefore comparing the resource utilization patterns of different communities can reveal the invasion mechanisms of specific non‐native species at the community level. We selected Lake Taihu, where icefish (Neosalanx taihuensis Chen) originated, and Lake Fuxian, where icefish invaded, as the research objects. We calculated the fish functional diversity indexes, including functional richness (FRic), functional evenness (FEve), and functional divergence (FDiv), to reflect differences in ecological niche and resource utilization based on four quarterly fish survey data from two lakes. The random forests model explored the relationship between functional diversity indexes and biotic and environmental variables. Our results showed that more diverse resource utilization (high FRic), more niche space (low FEve), and less competitive pressure (high FDiv) in Lake Fuxian were identified as the critical important factors for maintaining the current equilibrium state after successful invasion of icefish. The bottom‐up effects mainly affected the functional diversity indexes in Lake Fuxian. They differed from those in Lake Taihu and were primarily influenced by top‐down effects. Enhancing the top‐down effects in Lake Fuxian and limiting the zooplankton available to icefish are critical to controlling the invasion of icefish. This study offers a new perspective for studying the non‐native fish invasion mechanism, and provides scientific guidance for managing non‐native fish in Lake Fuxian.

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Development and testing of a planktonic index of biotic integrity (P-IBI) for Lake Fuxian, China

Cited by 2 publications

References 55 publications

Development and Evaluation of the Plankton Biological Integrity Index (P-IBI) in Dry and Wet Seasons for Dianchi Lake

Development and Evaluation of the Plankton Biological Integrity Index (P-IBI) in Dry and Wet Seasons for Dianchi Lake

Functional diversity explores the maintenance mechanism and driving factors of the invasion equilibrium state of the icefish (Neosalanx taihuensis Chen) in Lake Fuxian, China

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