Temporal and spatial variation of fish assemblages in Dianshan Lake, Shanghai, China

Hu, Zhongjun; Wang, Siqing; Wu, Hao; Chen, Qingjiang; Renliang, Ruan; Chen, Liqiao; Liu, Qigen

doi:10.1007/s00343-014-3193-4

Cited by 25 publications

(6 citation statements)

References 32 publications

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“…This result strengthen previous findings demonstrating temporal variation in community composition across seasons within the Dianshan Lake [27]. More specifically, we found that three sites (BB, KC and KD) contributed strongly to the spatial variation in community composition.…”

Section: Discussionsupporting

confidence: 92%

“…Similarly, [26] found strong spatial variations in the community composition of rock-restricted cichlid fishes in Lake Malawi which was related to the geographic distances between locations and local habitat variables. In contrast, no spatial variation in fish community composition was found within the Dianshan Lake (China) which might be explained either by homogeneous environmental conditions [27] or by strong dispersal abilities of individuals homogenizing communities over large spatial scales (i.e. "mass effect"; [28]).…”

Section: Discussionmentioning

confidence: 99%

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Spatio-temporal variation of fish taxonomic composition in a South-East Asian flood-pulse system

et al. 2017

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The Tonle Sap Lake (TSL) is a flood-pulse system. It is the largest natural lake in South-East Asia and constitutes one of the largest fisheries over the world, supporting the livelihood of million peoples. Nonetheless, the Mekong River Basin is changing rapidly due to accelerating water infrastructure development (hydropower, irrigation, flood control, and water supply) and climate change, bringing considerable modifications to the annual flood-pulse of the TSL. Such modifications are expected to have strong impacts on fish biodiversity and abundance. This paper aims to characterize the spatio-temporal variations of fish taxonomic composition and to highlights the underlying determinants of these variations. For this purpose, we used data collected from a community catch monitoring program conducted at six sites during 141 weeks, covering two full hydrological cycles. For each week, we estimated beta diversity as the total variance of the site-by-species community matrix and partitioned it into Local Contribution to Beta Diversity (LCBD) and Species Contribution to Beta Diversity (SCBD). We then performed multiple linear regressions to determine whether species richness, species abundances and water level explained the temporal variation in the contribution of site and species to beta diversity. Our results indicate strong temporal variation of beta diversity due to differential contributions of sites and species to the spatial variation of fish taxonomic composition. We further found that the direction, the shape and the relative effect of species richness, abundances and water level on temporal variation in LCBD and SCBD values greatly varied among sites, thus suggesting spatial variation in the processes leading to temporal variation in community composition. Overall, our results suggest that fish taxonomic composition is not homogeneously distributed over space and time and is likely to be impacted in the future if the flood-pulse dynamic of the system is altered by human activities.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Spatio-temporal variation of fish taxonomic composition in a South-East Asian flood-pulse system

et al. 2017

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“…And the different nutrients indices used in two periods could also bring bias. Second, biotic interaction among trophic levels, that is, herbivory stress(Hu et al., ), may also alter species interaction, in spite of the fact that other biotic factors, that is, algae, emergent macrophytes, free‐floating macrophytes, had few effects on inference of interaction coefficients (Fig. ).…”

Section: Discussionmentioning

confidence: 99%

“…Although the overall richness of the vascular aquatic plants has changed little, ten native species have disappeared and non‐native species have increased from 1959 to 2009 (Shi et al., ). In response, the fish richness has declined markedly, particularly for herbivores and piscivores (Hu et al., ).…”

Section: Methodsmentioning

confidence: 99%

Enhanced effects of biotic interactions on predicting multispecies spatial distribution of submerged macrophytes after eutrophication

Song

Cui

Zhang

et al. 2017

Ecology and Evolution

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Water eutrophication creates unfavorable environmental conditions for submerged macrophytes. In these situations, biotic interactions may be particularly important for explaining and predicting the submerged macrophytes occurrence. Here, we evaluate the roles of biotic interactions in predicting spatial occurrence of submerged macrophytes in 1959 and 2009 for Dianshan Lake in eastern China, which became eutrophic since the 1980s. For the four common species occurred in 1959 and 2009, null species distribution models based on abiotic variables and full models based on both abiotic and biotic variables were developed using generalized linear model (GLM) and boosted regression trees (BRT) to determine whether the biotic variables improved the model performance. Hierarchical Bayesian‐based joint species distribution models capable of detecting paired biotic interactions were established for each species in both periods to evaluate the changes in the biotic interactions. In most of the GLM and BRT models, the full models showed better performance than the null models in predicting the species presence/absence, and the relative importance of the biotic variables in the full models increased from less than 50% in 1959 to more than 50% in 2009 for each species. Moreover, co‐occurrence correlation of each paired species interaction was higher in 2009 than that in 1959. The findings suggest biotic interactions that tend to be positive play more important roles in the spatial distribution of multispecies assemblages of macrophytes and should be included in prediction models to improve prediction accuracy when forecasting macrophytes’ distribution under eutrophication stress.

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“…These species being commercial food fish, regulations on their harvests need to be administered and monitored. Though fish species constitute a fundamental component in the structure and function of Dianshan Lake's ecosystem, few documented studies have been conducted (Sun, Dai, Zhu, Ji, & Tian, 2007;Tao, Dai, Tian, & Ma, 2011;Hu et al, 2014;Kindong et al, 2017b). These studies did not directly target Tachysurus nitidus and Plagiognathops microlepis.…”

Section: Introductionmentioning

confidence: 99%

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Kindong¹,

Zhu²,

Dai³

et al. 2019

Turk. J. Fish. Aquat. Sci.

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This study was undertaken to estimate the life history parameters of the shining catfish (Tachysurus nitidus) and small-scale yellowfin (Plagiognathops microlepis) in Lake Dianshan using length-frequency data of 4070 specimens. Both species exhibited isometric growth. The von Bertalanffy growth constants for Tachysurus nitidus were L∞=25.15 cm, K=0.19 yr −1 , and t0=-0.378 yr with a derived growth performance index of Ø′ =2.08. The corresponding estimates for Plagiognathops microlepis were L∞=36.5 cm, K=0.10 yr −1 , t0=-0.40 yr and Ø′=2.125. The total mortality rate, Z, for Pelteobagrus nitidus was estimated as 1.51 yr −1 , with the fishing mortality, F, being calculated as 1.13 yr −1. The mortality estimates for Plagiognathops microlepis were Z=0.54 yr −1 and F=0.33 yr −1. The exploitation rates of both species (E=0.75 and E=0.61 for Tachysurus nitidusand Plagiognathops microlepis respectively) were higher than the optimum exploitation criterion (Eopt=0.5), which is indicative of over-fishing. The size-structured yield per recruit (YPR) analysis confirmed that both stocks are highly exploited, since current fishing mortality rates were higher than the biological reference points (BRPs) F0.1 (0.16 for Tachysurus nitidus and 0.15 for Plagiognathops microlepis) and Fmax (0.2 and 0.225 for Tachysurus nitidusand Plagiognathops microlepis respectively). The results further suggest that, for a sustainable management and an increase in yield, the current fishing effort for Tachysurus nitidus, be reduced to 0.2 and for Plagiognathops microlepis be decreased to 0.225. Other management action, such as gradual increase of fishing gears mesh sizes could also be considered necessary for sustainable exploitation of these stocks.

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Temporal and spatial variation of fish assemblages in Dianshan Lake, Shanghai, China

Cited by 25 publications

References 32 publications

Spatio-temporal variation of fish taxonomic composition in a South-East Asian flood-pulse system

Spatio-temporal variation of fish taxonomic composition in a South-East Asian flood-pulse system

Enhanced effects of biotic interactions on predicting multispecies spatial distribution of submerged macrophytes after eutrophication

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