Effects of land-use pattern and physiochemical conditions on phytoplankton communities in a German lowland catchment

Qu, Yuanzhi; Makarevičiūtė, Kristė; Guse, Björn; Fohrer, Nicola

doi:10.1127/fal/2018/1125

Cited by 12 publications

(5 citation statements)

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“…discharge, precipitation) allows calculating both flow and nutrient regimes. Numerous surveys have been conducted in this basin, most of which focused on water balance (Guse et al, 2014;Pfannerstill et al, 2014), community structures and functional groups of riverine phytoplankton (Qu et al, 2018(Qu et al, , 2019Sun et al, 2018;Wu et al, 2011aWu et al, , 2011bWu et al, , 2016. However, few studies have examined the diversity patterns of riverine algal communities (e.g.…”

Section: Description Of the Study Areamentioning

confidence: 99%

Environment regimes play an important role in structuring trait‐ and taxonomy‐based temporal beta diversity of riverine diatoms

Wang

Sun

et al. 2022

Journal of Ecology

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A sound understanding of the community changes over time and its driving forces is at the centre of biodiversity conservation and ecology research. In this study, we examined: (i) the relative roles of turnover and nestedness components to trait‐ and taxonomy‐based temporal beta diversity of riverine diatoms; (ii) whether trait‐based temporal beta diversity provides complementary information to taxonomy‐based temporal beta diversity; (iii) the relative roles of hydrology (e.g. discharge, antecedent precipitation index), metal ions (e.g. Mg2+, Si2+) and nutrients (e.g. nitrogen, orthophosphate) to the both facets of temporal beta diversity and their components (i.e. total beta diversity, turnover and nestedness); and (iv) whether inclusion of environment regimes increase their explained variations. A total of 338 daily samples of riverine diatom communities were collected. We employed Mantel tests to evaluate the complementarities between trait‐ and taxonomy‐based temporal beta diversity. Using distance‐based redundancy analysis (db‐RDA) and variation partitioning, we investigated the relative roles of hydrology, metal ions and nutrients to each facet of temporal beta diversity and its components. Correlations between trait‐ and taxonomy‐based temporal beta diversity and their components were weak, which showed their complementary ecological information. Taxonomy‐based total beta diversity had a high contribution by turnover component, whereas trait‐based total beta diversity was largely driven by nestedness component. Results of variation partitioning demonstrated that the pure and shared fractions of hydrology, metal ions and nutrient differed among the components of trait‐ and taxonomy‐based temporal beta diversity. Furthermore, addition of environment regimes could dramatically increase the explained variation of temporal beta diversity and its components. Synthesis. Our results highlighted the importance of the two facets of temporal beta diversity as well as their decomposition for exploring diversity patterns of riverine diatoms in relation to abiotic factors, particularly the environment regimes. Although a high temporal taxonomic divergence was detected, the high level of temporal trait convergence indicated that species turnover with similar biological traits occurred during our study period. Our study, for the first time, provides a new perspective into temporal beta diversity of daily riverine diatom communities, which has not yet been documented by previous freshwater studies.

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Section: Description Of the Study Areamentioning

confidence: 99%

Environment regimes play an important role in structuring trait‐ and taxonomy‐based temporal beta diversity of riverine diatoms

Wang

Sun

et al. 2022

Journal of Ecology

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“…Based on the previous investigation of this catchment, we found nutrients, especially the nitrate loads, were highly related with agriculture activities in the Treene basin (Haas et al, 2016). TB were dominant in most of the study area, while their share varied in time and space (Qu et al, 2018b). The temporary intensive occurrence of Microcystis in dry season received high concerns from the local stakeholders (Qu et al, 2018a).…”

Section: Introductionmentioning

confidence: 83%

Riverine phytoplankton functional groups response to multiple stressors variously depending on hydrological periods

Guse

Makarevičiūtė

et al. 2019

Ecological Indicators

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Rivers and related freshwater ecosystems are facing increasing natural disturbance and anthropogenic stressors. Understanding the key ecological processes that govern the riverine biota in aquatic ecosystems under multiple pressures has crucial importance. However, there is still insufficient knowledge in quantifying of stressors interactions. Moreover, the understanding of the responses of riverine phytoplankton to multiple stressors is still scarce from catchment aspect. As an interdisciplinary study, the catchment hydrological processes were linked to ecological responses in this study, and we chose phytoplankton functional groups (PFGs) instead of taxonomic classifications of algae to examine their responses to land-use pattern (L), hydrological regime (H), and physicochemical condition (P) across two contrasting hydrological periods (dry, wet). The traits-based phytoplankton functional groups are highly suggested as robust bio-indicators for better understanding the current ecological status. The hydrological regime was described by a matrix indices of hydrological alteration based on the outputs of a well-established ecohydrological model (SWAT). The results from variation partitioning analysis showed that P and H dominate during the dry period and P in high flows. Structural equation models (SEM) showed that the skewness of 7 days discharge emerged as a key driver of H, and had always an indirect effect on functional group TB (benthic diatoms) during both hydrological periods. The functional group M (mainly composed by Microcystis) has directly related to phosphorous in both periods, while indirectly to L of urban area in high flow period, and water bodies in low flow period. This study emphasized that climate change and anthropogenic activities such as altering flow regime and land-use pattern affect directly or indirectly riverine phytoplankton via physicochemical conditions. In addition, our findings

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“…We observed that the distribution variation of abundance in the spring time, species richness during spring and summer, and functional richness in the winter period were all best predicted by the flow alteration indices. It has been found in previous studies both in the river Treene and elsewhere that flow regime potentially affects the abundance (Qu et al, 2018a;Schneider et al, 2018;Atazadeh et al, 2021), species composition (Qu et al, 2018b) and has implications for their ecosystem functioning (Marazzi et al, 2017;Wu et al, 2019;Guo et al, 2020;Wu et al, 2022). Flow alteration indices have also been detected as indirect factors that affect the ecological processes in rivers by regulating water quality, such as nutrients and sediment input, and then enhance their influence on phytoplankton community (Kim et al, 2019;Qu et al, 2019).…”

Section: Impacts Of Flow Regime Alterationmentioning

confidence: 99%

“…The land cover area is accumulative along the longitudinal river continuum. The upstream watershed was determined for each site, and the land cover areas were converted to proportions for following analyses (details can be found in the previous paper Qu et al, 2018b;2019;Wu et al, 2018 and also see Appendix Table A. 3).…”

Section: Land Cover Patternmentioning

confidence: 99%

Distinct indicators of land use and hydrology characterize different aspects of riverine phytoplankton communities

Guse

Fohrer

2022

Science of The Total Environment

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Effects of land-use pattern and physiochemical conditions on phytoplankton communities in a German lowland catchment

Cited by 12 publications

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Environment regimes play an important role in structuring trait‐ and taxonomy‐based temporal beta diversity of riverine diatoms

Environment regimes play an important role in structuring trait‐ and taxonomy‐based temporal beta diversity of riverine diatoms

Riverine phytoplankton functional groups response to multiple stressors variously depending on hydrological periods

Distinct indicators of land use and hydrology characterize different aspects of riverine phytoplankton communities

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