scholarly journals Reconceptualising the beta diversity-environmental heterogeneity relationship in running water systems

2014 ◽  
Vol 60 (2) ◽  
pp. 223-235 ◽  
Author(s):  
Jani Heino ◽  
Adriano S. Melo ◽  
Luis M. Bini
Keyword(s):  
Beta Diversity ◽  
Environmental Heterogeneity ◽  
Water Systems ◽  
Running Water

scholarly journals High beta diversity among small islands is due to environmental heterogeneity rather than ecological drift

2018 ◽  
Vol 45 (10) ◽  
pp. 2252-2261 ◽  
Author(s):  
Jinliang Liu ◽  
Mark Vellend ◽  
Zuhua Wang ◽  
Mingjian Yu
Keyword(s):  
Beta Diversity ◽  
Environmental Heterogeneity ◽  
Small Islands ◽  
High Beta ◽  
Ecological Drift

The River Tay: ecological changes from source to estuary

1987 ◽  
Vol 92 (3-4) ◽  
pp. 373-392 ◽  
Author(s):  
Peter S. Maitland ◽  
Ian R. Smith
Keyword(s):  
Great Britain ◽  
Catchment Area ◽  
Water Systems ◽  
Scientific Investigation ◽  
Aquatic Systems ◽  
Aquatic Communities ◽  
Lower Altitude ◽  
Running Water ◽  
Ecological Changes ◽  
Catchment Size

SynopsisThe River Tay and its estuary is one of Britain's largest and most important aquatic systems. Rising at 625 m and flowing for 148 km the River Tay is the largest by flow in Great Britain and has a catchment area of 5031 km2. There are considerable ecological changes from source to estuary. These take the form of transitions, but four main aquatic communities can be recognised: an upper, base-poor, swift-flowing alpine section, then an oligotrophic section with moderate flows at lower altitude, next a much richer, slower flowing, more lowland stretch and finally the upper estuary itself. The problems of classifying and conserving running water systems are discussed and the importance of the Tay system is emphasised. The linear form and catchment size of larger rivers makes it difficult to give them—particularly their lower reaches and estuaries—full conservation protection. The River Tay is sufficiently unique, both physically and biologically, to warrant further scientific investigation and nature conservation protection.

scholarly journals Profiling the microbial community structure and functional diversity of a dam-regulated river undergoing gravel bar restoration

2020 ◽  
Author(s):  
Joeselle M. Serrana ◽  
Bin Li ◽  
Tetsuya Sumi ◽  
Yasuhiro Takemon ◽  
Kozo Watanabe
Keyword(s):  
Microbial Community ◽  
Microbial Communities ◽  
Community Composition ◽  
Beta Diversity ◽  
Environmental Heterogeneity ◽  
Trinity River ◽  
Metabolic Functions ◽  
Gravel Bars ◽  
Gravel Bar ◽  
The Trinity

AbstractBackgroundRiver restoration efforts are expected to influence and change the diversity and functions of microbial communities following the recovery of habitat characteristics in the river ecosystem. The recreation or restoration of gravel bars in the Trinity River in California aims to rehabilitate the environmental heterogeneity downstream of the dam impounded channel. Here, we profiled the community composition, estimated diversity, and annotated putative metabolic functions of the sediment microbial communities to assess whether the construction and restoration of gravel bars in the Trinity River in California enhanced environmental heterogeneity, with the increase in the microbial beta diversity of these in-channel structures against the free-flowing reach of the main channel with comparison to its undisturbed tributaries.ResultsMicrobial community composition of the free-flowing (i.e., no gravel bars) communities were relatively closer regardless of dam influence, whereas the Trinity River gravel bar and tributaries’ gravel bar communities were highly dissimilar. Proteobacteria, Bacteroidetes, and Acidobacteria were the highly abundant sediment microbial phyla on most sites, specifically in the Trinity River gravel bar communities. Putative functional annotation of microbial taxa revealed that chemoheterotrophy and aerobic chemoheterotrophy were the most prevalent microbial processes, with the Trinity River gravel bars having relatively higher representations. The considerably large abundance of heterotrophic taxa implies that gravel bars provide suitable areas for heterotrophic microorganisms with metabolic functions contributing to the net respiration in the river.ConclusionsOur results provide supporting evidence on the positive impact of habitat restoration being conducted in the Trinity River with the non-dam influenced, undisturbed tributaries as the basis of comparison. Gravel bar recreation and restoration contributed to the increased microbial biodiversity through the restoration of environmental heterogeneity at the river scale. We provided valuable insights into the potential microbial processes in the sediment that might be contributing to the biogeochemical processes carried out by the microbial communities in the Trinity River. The significant positive correlation between the functional diversity of the identified microbial taxa and beta diversity suggests that differences in the detected metabolic functions were closely related to dissimilarities in community composition.

Energy balance of running water systems

1978 ◽  
Vol 20 (3) ◽  
pp. 1800-1805
Author(s):  
W. Edelmann ◽  
K. Wuhrmann
Keyword(s):  
Energy Balance ◽  
Water Systems ◽  
Running Water

scholarly journals Global variation in the beta diversity of lake macrophytes is driven by environmental heterogeneity rather than latitude

2017 ◽  
Vol 44 (8) ◽  
pp. 1758-1769 ◽  
Author(s):  
Janne Alahuhta ◽  
Sarian Kosten ◽  
Munemitsu Akasaka ◽  
Dominique Auderset ◽  
Mattia M. Azzella ◽  
...  
Keyword(s):  
Beta Diversity ◽  
Environmental Heterogeneity ◽  
Global Variation

Alpha and beta diversity of planktonic microcrustaceans are associated with environmental heterogeneity in the Frades River Basin, Brazil

2021 ◽  
pp. 1-12
Author(s):  
Escarlett de Arruda Ramos ◽  
Adriana Tiemi Ramos Okumura ◽  
Allison Gonçalves Silva ◽  
Tiago Leão Pereira ◽  
Nadson Ressyé Simões
Keyword(s):  
River Basin ◽  
Beta Diversity ◽  
Environmental Heterogeneity ◽  
Alpha And Beta Diversity

Beta diversity as a tool for determining priority streams for management actions

2015 ◽  
Vol 71 (10) ◽  
pp. 1429-1435 ◽  
Author(s):  
Luis Gabriel Antão Barboza ◽  
Roger Paulo Mormul ◽  
Janet Higuti
Keyword(s):  
Beta Diversity ◽  
Aquatic Ecosystems ◽  
Environmental Heterogeneity ◽  
Anthropogenic Activities ◽  
Conservation Areas ◽  
Management Actions ◽  
Rural And Urban ◽  
Management Plans ◽  
Using Data ◽  
Tropical Aquatic Ecosystems

Beta diversity has become essential for understanding ecosystem functioning and for determining biodiversity-conservation priority areas. However, the beta diversity patterns of invertebrates in tropical aquatic ecosystems are not well known, particularly in streams. Using data from low-order streams located in southern Brazil, we evaluated the beta diversity of Chironomidae. We tested the hypothesis that increased environmental heterogeneity increases beta diversity. The streams were grouped into two categories, rural and urban, according to the percentage of urbanization in their micro-basins. Our results showed that the heterogeneity of environmental variables can determine the beta diversity of Chironomidae, and the increased environmental heterogeneity caused by differences in the intensity of urbanization impacts can increase the beta diversity in urban streams. Therefore, the intensified impacts of anthropogenic activities in aquatic ecosystems can also increase beta diversity. Finally, we suggested that beta diversity can be an effective tool for not only designing measures and determining priority conservation areas, but also accurately identifying potentially degraded and priority sites that require water management plans.

scholarly journals Fish beta diversity responses to environmental heterogeneity and flood pulses are different according to reproductive guild

2018 ◽  
Vol 16 (4) ◽  
Author(s):  
Ángela Gutiérrez C ◽  
Jean Carlo Gonçalves Ortega ◽  
Angelo Antonio Agostinho
Keyword(s):  
Parental Care ◽  
Beta Diversity ◽  
Environmental Heterogeneity ◽  
Linear Models ◽  
Fish Assemblages ◽  
Generalized Least Squares ◽  
The Other ◽  
Dispersal Capacity ◽  
Reproductive Guilds ◽  
Reproductive Guild

ABSTRACT In floodplain communities, beta diversity is influenced by different factors; however, environmental heterogeneity and floods are believed to be particularly influential. The influence of environmental heterogeneity and floods on beta diversity may vary among guilds that present different ecological traits. This study evaluated the correlation between the environmental heterogeneity and flood periods and the beta diversity of trophic and reproductive guilds of fish assemblages. Sampling was conducted quarterly between 2000 and 2012 in the upper Paraná River floodplain. The environmental heterogeneity and period (i.e., dry or flood) were associated with the beta diversity of each guild based on the results of generalized least squares linear models. Only guilds with parental care were influenced by the interaction between environmental heterogeneity and period. The beta diversity of the other guilds presented no relationship between environmental heterogeneity and period. It is likely that species with parental care presented less dispersal capacity, which increased the dissimilarity among assemblages. The higher dispersion rates of the other guilds may be responsible for the lack of relationship between the beta diversity and the environmental heterogeneity and period. In sum, these results suggest that reproductive guilds influence how environmental heterogeneity and floods affect beta diversity variation.

Influence of environmental heterogeneity and geographic distance on beta-diversity of woody communities

Plant Ecology ◽  
2020 ◽  
Vol 221 (7) ◽  
pp. 595-614
Author(s):  
Ernesto Vega ◽  
Miguel Martínez-Ramos ◽  
Felipe García-Oliva ◽  
Ken Oyama
Keyword(s):  
Beta Diversity ◽  
Environmental Heterogeneity ◽  
Geographic Distance
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