Downstream transport processes modulate the effects of environmental heterogeneity on riverine phytoplankton

The Science of The Total Environment, Journal Year: 2019, Volume and Issue: 703, P. 135519 - 135519

Published: Nov. 14, 2019

Language: Английский

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Navigating through space and time: A methodological approach to quantify spatiotemporal connectivity using stream flow data as a case study

Methods in Ecology and Evolution, Journal Year: 2023, Volume and Issue: 14(7), P. 1780 - 1795

Published: May 16, 2023

Abstract The growing interest in combining spatial and temporal patterns nature has been fostered by the current availability of high‐frequency measurements. However, we still lack a methodological framework to process interpret spatiotemporal datasets into meaningful values, adaptable different time windows and/or responding structures. Here, developed tested evaluate connectivity using two new measures: ( STcon ) matrix STconmat ). To obtain these measures, consider set spatially connected sites within temporally dynamic network. These measures are calculated from where connections across captured. respond determined network structure, assign values generate scenarios which connectivity. We dataset stream flow state spanning 513‐day period obtained data loggers installed seven temporary streams. allowed us characterise among reaches relate with macroinvertebrate community structure composition. Spatiotemporal differed streams, capturing hydrological patterns. Macroinvertebrate richness diversity were higher more spatiotemporally sites. Community dissimilarity was related showing that had similar communities for active passive dispersers. Interestingly, both groups some analysed scenarios, highlighting relevance systems. As exemplified, proposed can help disentangle quantify dynamics or be applied conservation systems such as is not limited features It extended other ecosystems including structures assess Such especially relevant context global change, being heavily disrupted human activities.

Language: Английский

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The Biology and Ecology of Streams and Rivers

Oxford University Press eBooks, Journal Year: 2023, Volume and Issue: unknown

Published: May 30, 2023

Abstract A major textbook on running waters, promoting understanding of the nature rivers as ecosystems, and detailing biodiversity natural history their biota. The book takes a primarily biological approach to river ecology, dealing with scientific questions about but referring throughout possible applications approaches management. notion habitat templet refers suite environmental factors that face lotic organisms adaptations traits enable survival in such challenging environments. How does complex, patchy whole-river networks impinge population dynamics communities? Species interactions food web linkages determine flow energy material through communities lead ecosystem processes metabolism (the balance primary production community respiration) ecology nutrients. stresses systems ‘open’ exchanging materials land downstream systems. can be sustainable part capital which we all depend? In final chapter forward-looking view is progressively devoted applied questions. Biology Ecology Streams Rivers seeks provide knowledge necessary for their, our, future. We need appreciate ‘what do us’ reverse deterioration waters an increasingly thirsty, hungry changing world.

Language: Английский

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Historical processes constrain metacommunity structure by shaping different pools of invertebrate taxa within the Orinoco basin

Diversity and Distributions, Journal Year: 2019, Volume and Issue: 26(1), P. 49 - 61

Published: Nov. 5, 2019

Abstract Aim To identify and characterize the distribution of invertebrate taxa in Orinoco basin how their affects metacommunity structure along river network. Location Meta Guaviare sub‐basins, basin, Colombia, South America. Methods We characterized communities environmental characteristics 25 streams from six ecoregions basin. The present different historical evolution, altitude, slope, climate vegetation features. used multiplicative diversity partitioning to compare contributions riffle (α β1), stream (β2) ecoregional (β3) scales overall gamma also applied Elements Metacommunity Structure framework delineate types a distance‐based redundancy analysis assess relative relevance environmental, spatial drivers species compositions communities. Results Streams showed significant differences community composition among ecoregions. Several discrete pools occurred that largely matched Consequently, resembled Clementsian idealized structure. was mostly explained by ecoregion type its interaction with local environment, particularly physiographic Main conclusions Historical evolutionary processes have resulted differing between At scale, seems be constrained features rather than or environment. Hence, using as unit for biodiversity conservation management would not adequately reflect patterns highly heterogeneous basins such

Language: Английский

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Environmental drivers of the metacommunity structure of insects on the surface of tropical streams of the Amazon

Austral Ecology, Journal Year: 2020, Volume and Issue: 45(5), P. 586 - 595

Published: Feb. 28, 2020

Abstract Understanding how species are distributed according to environmental and spatial variation is still one of the main issues in community ecology. We analysed responses semiaquatic bugs (Gerromorpha: Hemiptera) processes considered drivers metacommunity structure Amazonian streams. tested hypotheses that variables determine structures, both dendritic overland, not representative structure. Environmental were collected from 39 stream sites. Spatial calculated two configurations – overland hydrographic distances between used partial redundancy analysis test relative importance environment space on structure, considering separately. The tropical streams, mainly structured by depth, canopy, embeddedness slope variables. Our results also indicate little or no dispersion limitation, as patterns found. Thus, selection determines bugs' due achievement optimal habitats through dispersal. believe cannot be ruled out a driver, since peculiarities group show seasonal changes ability, may occur under different temporal scales.

Language: Английский

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