Multi-scale temporal dynamics of epilithic algal assemblages: evidence from a Chinese subtropical mountain river network

Tang, Tao; Jia, Xinhuan; Jiang, Wanxiang; Cai, Qinghua

doi:10.1007/s10750-015-2603-8

Cited by 12 publications

(15 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, some small spatial scale sampling or regular bio-monitoring projects usually apply seasonal or monthly frequencies6253031, while few studies with weekly sampling frequency3233. By comparison, our results, provide a concrete baseline for the first time and will be beneficial for future planning of diatom based bio-monitoring campaigns.…”

Section: Discussionmentioning

confidence: 64%

“…4), indicating the greater contribution of hydrological factors than physicochemical variables to diatom community changes. Hydrological conditions and precipitation are general factors that determine the habitat and affect (directly or indirectly) many other environmental variables that are key factors in diatom community development, such as discharge, residence time, temperature, light availability, and dissolved oxygen2532. Moreover, strong precipitation and associated surface run-off may accelerate the transportation of diatom species from soil surface to stream water via soil macro-pores or surface runoff18.…”

Section: Discussionmentioning

confidence: 99%

“…This prerequisite is widely recognized but has not yet been studied until now. Recent research carried out in a Chinese subtropical mountain river network has concluded that long-term and high-frequency (i.e., monthly) bio-monitoring protocols should be developed for accurately capturing the benthic algal temporal dynamics25. Prompted by the importance of bio-monitoring studies and the scarcity of investigations on ASFs, this study took a step further based on a valuable daily sampling regime and quantified the ASFs at different wetness conditions (indicated by APIs) (Figs 4 and 5).…”

Section: Discussionmentioning

confidence: 99%

“…Up to now, temporal dynamics of diatom communities have been widely investigated, since these variations can affect ecosystem processes, functioning and stability, and reflect major shifts in environmental conditions2526. Nevertheless, the temporal sampling intervals across these studies varied greatly (sub-daily to yearly) and mainly depended on the research objectives and spatial sampling scales.…”

mentioning

confidence: 99%

“…For large spatial sampling studies, the researchers normally visited the sampling sites only once (few of them revisited for a second time)23272829. Seasonal and/or monthly collections have often been applied at small spatial-scale sampling or in regular bio-monitoring projects6253031. Few studies have applied weekly sampling frequencies3233.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Importance of sampling frequency when collecting diatoms

Faber

Sun

et al. 2016

Sci Rep

View full text Add to dashboard Cite

There has been increasing interest in diatom-based bio-assessment but we still lack a comprehensive understanding of how to capture diatoms’ temporal dynamics with an appropriate sampling frequency (ASF). To cover this research gap, we collected and analyzed daily riverine diatom samples over a 1-year period (25 April 2013–30 April 2014) at the outlet of a German lowland river. The samples were classified into five clusters (1–5) by a Kohonen Self-Organizing Map (SOM) method based on similarity between species compositions over time. ASFs were determined to be 25 days at Cluster 2 (June-July 2013) and 13 days at Cluster 5 (February-April 2014), whereas no specific ASFs were found at Cluster 1 (April-May 2013), 3 (August-November 2013) (>30 days) and Cluster 4 (December 2013 - January 2014) (<1 day). ASFs showed dramatic seasonality and were negatively related to hydrological wetness conditions, suggesting that sampling interval should be reduced with increasing catchment wetness. A key implication of our findings for freshwater management is that long-term bio-monitoring protocols should be developed with the knowledge of tracking algal temporal dynamics with an appropriate sampling frequency.

show abstract

Section: Discussionmentioning

confidence: 64%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Importance of sampling frequency when collecting diatoms

Faber

Sun

et al. 2016

Sci Rep

View full text Add to dashboard Cite

show abstract

Hydrological and environmental variables outperform spatial factors in structuring species, trait composition, and beta diversity of pelagic algae

Guse

Makarevičiūtė

et al. 2018

Ecology and Evolution

View full text Add to dashboard Cite

There has been increasing interest in algae‐based bioassessment, particularly, trait‐based approaches are increasingly suggested. However, the main drivers, especially the contribution of hydrological variables, of species composition, trait composition, and beta diversity of algae communities are less studied. To link species and trait composition to multiple factors (i.e., hydrological variables, local environmental variables, and spatial factors) that potentially control species occurrence/abundance and to determine their relative roles in shaping species composition, trait composition, and beta diversities of pelagic algae communities, samples were collected from a German lowland catchment, where a well‐proven ecohydrological modeling enabled to predict long‐term discharges at each sampling site. Both trait and species composition showed significant correlations with hydrological, environmental, and spatial variables, and variation partitioning revealed that the hydrological and local environmental variables outperformed spatial variables. A higher variation of trait composition (57.0%) than species composition (37.5%) could be explained by abiotic factors. Mantel tests showed that both species and trait‐based beta diversities were mostly related to hydrological and environmental heterogeneity with hydrological contributing more than environmental variables, while purely spatial impact was less important. Our findings revealed the relative importance of hydrological variables in shaping pelagic algae community and their spatial patterns of beta diversities, emphasizing the need to include hydrological variables in long‐term biomonitoring campaigns and biodiversity conservation or restoration. A key implication for biodiversity conservation was that maintaining the instream flow regime and keeping various habitats among rivers are of vital importance. However, further investigations at multispatial and temporal scales are greatly needed.

show abstract

Seasonal shifts in the assembly dynamics of benthic macroinvertebrate and diatom communities in a subtropical river

Wang

Tang

et al. 2020

Ecology and Evolution

Self Cite

View full text Add to dashboard Cite

Identifying seasonal shifts in community assembly for multiple biological groups is important to help enhance our understanding of their ecological dynamics. However, such knowledge on lotic assemblages is still limited. In this study, we used biological traits and functional diversity indices in association with null model analyses to detect seasonal shifts in the community assembly mechanisms of lotic macroinvertebrates and diatoms in an unregulated subtropical river in China. We found that functional composition and functional diversity (FRic, FEve, FDis, MNN, and SDNN) showed seasonal variation for macroinvertebrate and diatom assemblages. Null models suggested that environmental filtering, competitive exclusion, and neutral process were all important community assembly mechanisms for both biological groups. However, environmental filtering had a stronger effect on spring macroinvertebrate assemblages than autumn assemblages, but the effect on diatom assemblages was the same in both seasons. Moreover, macroinvertebrate and diatom assemblages were shaped by different environmental factors. Macroinvertebrates were filtered mainly by substrate types, velocity, and COD Mn , while diatoms were mainly shaped by altitude, substrate types, and water quality. Therefore, our study showed (a) that different biological assemblages in a river system presented similarities and differences in community assembly mechanisms, (b) that multiple processes play important roles in maintaining benthic community structure, and (c) that these patterns and underlying mechanisms are seasonally variable. Thus, we highlight the importance of exploring the community assembly mechanisms of multiple biological groups, especially in different seasons, as this is crucial to improve the understanding of river community changes and their responses to environmental degradation. K E Y W O R D SChishui River, functional diversity, functional traits, lotic assemblages, null model | 693 WANG et Al.

show abstract

Multi-scale temporal dynamics of epilithic algal assemblages: evidence from a Chinese subtropical mountain river network

Cited by 12 publications

References 50 publications

Importance of sampling frequency when collecting diatoms

Importance of sampling frequency when collecting diatoms

Hydrological and environmental variables outperform spatial factors in structuring species, trait composition, and beta diversity of pelagic algae

Seasonal shifts in the assembly dynamics of benthic macroinvertebrate and diatom communities in a subtropical river

Contact Info

Product

Resources

About