Concordance in biological condition and biodiversity between diatom and macroinvertebrate assemblages in Chinese arid-zone streams

Chen, Kai; Sun, Dandan; Rajper, Abdul Razzaque; Mulatibieke, Mahati; Hughes, Robert M.; Pan, Yangdong; Tayibazaer, Aletai; Chen, Qiuwen; Wang, Beixin

doi:10.1007/s10750-018-3836-0

Cited by 9 publications

(12 citation statements)

References 83 publications

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“…These regions are ideal intermediate-sized systems (i.e., within a drainage basin) for our study with spatial extent ranging between 168 and 311 km. The study regions located in different climate zones: ITR, QTR and MKR in temperate arid climate, subtropical monsoon climate and tropical monsoon climate, respectively (Wang et al, 2012;Ding et al, 2017;Chen et al, 2019). They are also evidently different in human land use characteristics.…”

Section: Study Areamentioning

confidence: 99%

“…Benthic macroinvertebrates and diatoms were collected simultaneously from a 100 m-long reach at each sampling site in ITR in March 2013, in QTR in April 2010 and in MKR in June 2013. We collected macroinvertebrates using a Surber-net (30 × 30 cm, 250 µm mesh size) from three riffles and two pools with a total of 0.45 m 2 sampling area (Chen et al, 2019). All Surber net samples were combined into one composite sample and preserved in 10% buffered formalin.…”

Section: Biotic Samplingmentioning

confidence: 99%

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Environmental Factors Override Dispersal-Related Factors in Shaping Diatom and Macroinvertebrate Communities Within Stream Networks in China

Soininen

Chen

et al. 2020

Front. Ecol. Evol.

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Metacommunity theory provides a useful framework to describe the underlying factors (e.g., environmental and dispersal-related factors) influencing community structure. The strength of these factors may vary depending on the properties of the region studied (e.g., environmental heterogeneity and spatial location) and considered biological groups. Here, we examined environmental and dispersal-related controls of stream macroinvertebrates and diatoms in three regions in China using the distance-decay relationship analysis. We performed analyses for the whole stream network and separately for two stream network locations (headwater and downstream sites) to test the network position hypothesis (NPH), which states that the strength of environmental and dispersal-related controls varies between headwater and downstream communities. Community dissimilarities were significantly related to environmental distances, but not geographical distances. These results suggest that communities are structured strongly by environmental filtering, but weakly by dispersal-related factors such as dispersal limitation. More importantly, we found that, at the whole network scale, environmental control was the highest in the regions with highest environmental heterogeneity. Results further showed that the influence of environmental control was strong in both headwaters and downstream sites, whereas spatial control was generally weak in all sites. This suggests a lack of consistent support for the NPH in our studied stream networks. Moreover, we found that local-scale variables relative to basin-scale variables better explained community dissimilarities for diatoms than for macroinvertebrates. This indicates that diatoms and macroinvertebrates responded to environment at different scales. Collectively, these results suggest that the importance of drivers behind the metacommunity assembly varied among regions with different level of environmental heterogeneity and between organism groups, potentially indicating context dependency among stream systems and taxa.

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Section: Study Areamentioning

confidence: 99%

Section: Biotic Samplingmentioning

confidence: 99%

Environmental Factors Override Dispersal-Related Factors in Shaping Diatom and Macroinvertebrate Communities Within Stream Networks in China

Soininen

Chen

et al. 2020

Front. Ecol. Evol.

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“…The study regions are evidently different in natural climatic conditions and human land use characteristics (Fig. 1; Table 1) (Chen et al, 2019;Ding et al, 2017;Wang et al, 2012), thus showing notable differences in among-region environmental heterogeneity. MKR is a tropical rain forest area characterised by a tropical monsoon climate (Ding et al, 2017).…”

Section: Study Areamentioning

confidence: 99%

“…MKR is a tropical rain forest area characterised by a tropical monsoon climate (Ding et al, 2017). QTR and ITR are characterised by a subtropical monsoon climate (Wang et al, 2012) and a temperate arid climate (Chen et al, 2019), respectively. In recent years, MKR and QTR have undergone a significant land use change such as a decline in forest cover (Ding et al, 2017;Wang et al, 2012).…”

Section: Study Areamentioning

confidence: 99%

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Elements of metacommunity structure of diatoms and macroinvertebrates within stream networks differing in environmental heterogeneity

Chen

Soininen

et al. 2020

Journal of Biogeography

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Aim Idealized metacommunity structures (i.e. checkerboard, random, quasi-structures, nested, Clementsian, Gleasonian, and evenly spaced) have recently gained increasing attention, but their relationships with environmental heterogeneity and how they vary with organism groups remain poorly understood. Here we tested two main hypotheses: (1) gradient-driven patterns (Clementsian and Gleasonian) occur frequently in heterogeneous environments, and (2) small organisms (here, diatoms) are more likely to exhibit gradient-driven patterns than large organisms (here, macroinvertebrates). Location Streams in three regions in China. Taxon Diatoms and macroinvertebrates MethodsThe stream diatom and macroinvertebrate data, as well as the environmental data collected from the same set of sites were used to examine the idealized metacommunity structures via the elements of the metacommunity structure (EMS; coherence, turnover, and boundary clumping) analysis in three regions. We extended the traditional EMS approach by ordering sites along known environmental gradients. ResultsWe found that Clementsian structure with high degrees of coherence and turnover, and significantly positive clumping was typically observed in the high-heterogeneity regions, whereas randomness was prevalent in the low-heterogeneity region. Macroinvertebrates exhibited clearer Clementsian structures compared with diatoms, while diatoms showed more randomness compared with macroinvertebrates, indicating a stronger role of environmental filtering for macroinvertebrates than diatoms. In most cases, the results of the more novel EMS approach differed from the results of the traditional EMS technique. Main conclusionsOur results suggested that the occurrence of different metacommunity structures may be related with the degree of regional environmental heterogeneity. However, diatom metacommunities were more random than those of macroinvertebrate, and such an unexpected result may result from different dispersal abilities between the two organism groups. In addition, we found that the novel EMS approach increased power in discerning metacommunity structure in comparison to the traditional EMS technique.

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Combining taxonomic and functional approaches to assess land‐use impacts on macroinvertebrate assemblages and improve bioindication

Paz

Rodríguez

Capítulo

et al. 2023

River Research & Apps

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Most studies exploring land use impacts have focused on taxonomic metrics, but interest in the functional approach has increased because it helps to understand the relationships between community structure and functioning of aquatic ecosystems. We evaluated how functional and taxonomic approaches, and the association between them, contribute to assessing the effects of land use on macroinvertebrate assemblages of lowland streams. We sampled benthic macroinvertebrates in 17 sites with different land uses (agricultural, peri‐urban, and extensive livestock) in Buenos Aires, Argentina. We computed the taxonomic metrics and biotic indexes as well as functional richness (FRic), divergence (FDiv), dispersion (FDis), and Rao diversity indexes for each site. We performed general linear mixed models to compare land‐uses, a redundancy analysis, and also performed correlation analysis between taxonomic and functional indexes. Taxonomic richness was significantly higher in extensive livestock than in the other two land uses, while Shannon diversity was significantly different between land uses (extensive livestock > peri‐urban > agriculture). FRic and FDiv were significantly lower in peri‐urban land use than in agricultural and extensive livestock sites. Only taxonomic richness showed a significant and positive relationship with FRic, FDis, and Rao, but they fit better to a logarithmic function. Therefore, an increase in taxonomic richness and Shannon diversity did not necessarily imply an increase in the functional aspects of the macroinvertebrate assemblage. Using only one of these approaches could lead to partial evaluations and loss of information. Combining them could improve bioindication and predictive potential and help assess the effects of multiple stressors on freshwater ecosystems to improve biomonitoring.

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Concordance in biological condition and biodiversity between diatom and macroinvertebrate assemblages in Chinese arid-zone streams

Cited by 9 publications

References 83 publications

Environmental Factors Override Dispersal-Related Factors in Shaping Diatom and Macroinvertebrate Communities Within Stream Networks in China

Environmental Factors Override Dispersal-Related Factors in Shaping Diatom and Macroinvertebrate Communities Within Stream Networks in China

Elements of metacommunity structure of diatoms and macroinvertebrates within stream networks differing in environmental heterogeneity

Combining taxonomic and functional approaches to assess land‐use impacts on macroinvertebrate assemblages and improve bioindication

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