Spatial variation in macrobenthic assemblages and their relationship with environmental factors in the upstream and midstream regions of the Heihe River Basin, China

Wang, Yu; Juan-juan, Liu; Liu, Wei; Feng, Qi; Li, Baolong; Han, Longfei; Wang, Shuang

doi:10.1007/s10661-020-08822-0

Cited by 22 publications

(9 citation statements)

References 56 publications

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“…In particular, estuaries are affected by the interactions between land and sea, resulting in a more complex natural environment. Therefore, environmental factors have a more signi cant impact on the spatiotemporal changes in macrobenthic communities (Wang et al 2021). The results of CCA showed that the macrobenthic communities were affected by environmental variables, mainly T, DO, Sal, NH 4 -N, NH 4 -N soil , PO 4 -P, NO 2 -N, and NO 2 -Nsoil, consistent with the results of previous studies (Verneaux and Schmitt.…”

Section: Discussionsupporting

confidence: 89%

An evaluation of macrobenthos habitat suitability in the bivalve farming area near Xiaoqing estuary

Liu

Zhu

et al. 2022

Preprint

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Since macrobenthos play an important role in the energy flow and material circulation of marine systems, they can act as an indicator of ecosystem health. Because there are generally complex relationships between macrobenthos and environmental factors, the optimal model for simulating macrobenthos habitat is a nonlinear, nonparametric model with a relatively flexible structure. This study applied canonical correlation analysis (CCA) to identify the key ecological factors affecting the community characteristics of macrobenthos in the bivalve farming area near Xiaoqing estuary. Responses of species richness to environmental factors were studied using the generalized additive model (GAM), and the Margalef index (dM) was used instead of individual indicator species to indicate diversity variation. Six factors were selected in the optimal model by stepwise regression: salinity (Sal), sediment organic matter (SOM), ammonium nitrogen (NH4-N), phosphate in interstitial water (PO4-Psoil), ammonium nitrogen in interstitial water (NH4-Nsoil), and nitrate nitrogen in interstitial water (NO3-Nsoil) in the substrates. The response curves generated by the GAM showed a unimodal relationship between taxa diversity and Sal and SOM, dM was positively correlated with NH4-N, and was negatively correlated with PO4-Psoil. The model optimized by forward stepwise optimization explained 92.6% of biomass variation, with a small residual (2.67). The measured dM was strongly correlated with the predicted dM (Pearson R2 = 0.845, p < 0.05). This study can increase understanding of the relationships between the macrobenthic community and aquaculture activities in the bivalve farming area near Xiaoqing estuary.

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Section: Discussionsupporting

confidence: 89%

An evaluation of macrobenthos habitat suitability in the bivalve farming area near Xiaoqing estuary

Liu

Zhu

et al. 2022

Preprint

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“…This section of the basin is characterized by the presence of intensive agricultural activities and urban centers that are documented pollution sources threating water quality of Adige river [19,20]. The decreasing trend of Pielou evenness (J) and Simpson (λ) indices at this longitudinal range showed macrobenthic communities dominated by few taxa, as commonly observed in agricultural impacted aquatic ecosystems, e.g., [33,34]. The analysis of biological traits did not identify any other attribute of these organisms, except from an increase at the medium section of adult aquatic life habit due to increased abundances of oligochaeta.…”

Section: Discussionmentioning

confidence: 89%

Structural and Functional Variations of the Macrobenthic Community of the Adige Basin along the River Continuum

Gaglio,

Aschonitis,

Muresan

et al. 2021

Water

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Since the publication of the River Continuum Concept (RCC), the capacity of the longitudinal dimension to predict the distribution of species and ecological functions in river networks was discussed by different river theories. The taxonomic structures and functional attributes of macrobenthic communities were investigated along the river continuum in the river Adige network (Northern Italy), with the aim to test the reliability of RCC theory and clarify the relation between structural and functional features in lotic systems. Distance from the spring was found to be most representative proxy among environmental parameters. The analysis highlighted the decrease of biodiversity levels along the river continuum. The decrease of taxonomic diversity corresponded to the loss in functional richness. The abundances of predator and walker taxa, as well as semelparous organisms, declined along the longitudinal gradient, suggesting variations in community complexity and granulometry. Regression models also depicted the presence of disturbed communities in the central section of the basin, where intensive agricultural activities occur, that affected environmental gradients. Overall, results offered evidences that the river continuum may predict macrobenthic community structures in terms of taxonomic diversity, thus confirming the general validity of RCC. Nonetheless, the functional analysis did not provide equally clear evidences to support the theory. After four decades from its postulation, the RCC is still a reliable model to predict the general macroinvertebrates distribution. However, community functions may respond to a number of local factors not considered in RCC, which could find a declination in other theories. The relations between structural and functional features confirmed to be complex and sensitive to disturbances and local conditions.

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“…The connection between macro-benthos and environmental aspects has been an important issue in an aquatic ecological study [4]. Studying the relationship between macro-benthic organisms and environmental parameters is of good significance not only to keep up the equilibrium of the aquatic system but additionally to supply an essential scientific basis for the protection of the macro-benthos community [5].…”

Section: Introductionmentioning

confidence: 99%

Effect of Environmental Variations on Macro-benthos Occurrence and Abundance of the Red Sea Coast of Egypt

El-Sokkary

Obuid-Allah²,

El-Wakeil³

et al. 2022

Assiut University Journal of Multidisciplinary Scientific Resea

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Spatial variation in macrobenthic assemblages and their relationship with environmental factors in the upstream and midstream regions of the Heihe River Basin, China

Cited by 22 publications

References 56 publications

An evaluation of macrobenthos habitat suitability in the bivalve farming area near Xiaoqing estuary

An evaluation of macrobenthos habitat suitability in the bivalve farming area near Xiaoqing estuary

Structural and Functional Variations of the Macrobenthic Community of the Adige Basin along the River Continuum

Effect of Environmental Variations on Macro-benthos Occurrence and Abundance of the Red Sea Coast of Egypt

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