Hydrology Affects Environmental and Spatial Structuring of Microalgal Metacommunities in Tropical Pacific Coast Wetlands.
Carmen Rojo,Francesc Mesquita-Joanes,Juan S. Monrós,Javier Armengol,Mahmood Sasa,Fabián Bonilla,Ricardo Rueda,José Benavent-Corai,Rubén Piculo,Matilde Segura +9 more
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In this paper, spatial and environmental effects, modulated by a seasonal flooding climatic pattern, on the distribution of microalgae in 30 wetlands of a tropical dry forest region: the Pacific coast of Costa Rica and Nicaragua.Abstract:
The alternating climate between wet and dry periods has important effects on the hydrology and therefore on niche-based processes of water bodies in tropical areas. Additionally, assemblages of microorganism can show spatial patterns, in the form of a distance decay relationship due to their size or life form. We aimed to test spatial and environmental effects, modulated by a seasonal flooding climatic pattern, on the distribution of microalgae in 30 wetlands of a tropical dry forest region: the Pacific coast of Costa Rica and Nicaragua. Three surveys were conducted corresponding to the beginning, the highest peak, and the end of the hydrological year during the wet season, and species abundance and composition of planktonic and benthic microalgae was determined. Variation partitioning analysis (as explained by spatial distance or environmental factors) was applied to each seasonal dataset by means of partial redundancy analysis. Our results show that microalgal assemblages were structured by spatial and environmental factors depending on the hydrological period of the year. At the onset of hydroperiod and during flooding, neutral effects dominated community dynamics, but niche-based local effects resulted in more structured algal communities at the final periods of desiccating water bodies. Results suggest that climate-mediated effects on hydrology can influence the relative role of spatial and environmental factors on metacommunities of microalgae. Such variability needs to be accounted in order to describe accurately community dynamics in tropical coastal wetlands.read more
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Rainfall leads to habitat homogenization and facilitates plankton dispersal in tropical semiarid lakes
Jandeson Brasil,Jandeson Brasil,Juliana B. O. Santos,Wanessa Sousa,Rosemberg Fernandes Menezes,Vera L. M. Huszar,José Luiz Attayde +6 more
TL;DR: In this article, the role played by spatial variables is more important in the dry than in the rainy season, because drought increases lakes isolation in semiarid regions, and the variation in plankton structure between seasons attributable to local and spatial predictors by using variation-partitioning techniques.
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Macrophyte functional groups elucidate the relative role of environmental and spatial factors on species richness and assemblage structure
TL;DR: In this article, the relative importance of environmental and spatial factors on species richness and assemblage structure of macrophytes in 29 coastal wetlands in southern Brazil was evaluated, showing that both environment and space would show greater relative importance for floating and submerged than for emergent species.
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Ordination obscures the influence of environment on plankton metacommunity structure
TL;DR: In this paper, the authors investigated the role of environmental and spatial factors on metacommunity structure, and proposed a statistic that responds to variation in both coherence and turnover of plankton communities.
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Environment and Space Rule, but Time Also Matters for the Organization of Tropical Pond Metacommunities
Ángel Gálvez,Josep A. Aguilar-Alberola,Xavier Armengol,Fabián Bonilla,Sanda Iepure,Juan S. Monrós,Carla Olmo,Carmen Rojo,Juan Rueda,Ricardo Rueda,Mahmood Sasa,Francesc Mesquita-Joanes +11 more
TL;DR: In this article, the influence of time independently of environmental change in metacommunities has been rarely considered, and the authors surveyed 30 temporary ponds along the dry tropical region of western Costa Rica and Nicaragua at three different moments of their hydroperiod.
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Community assembly: perspectives from phytoplankton’s studies
TL;DR: A review of the latter 20 years in plankton community assembly studies suggests some advancements and drawbacks as discussed by the authors, which is a topic of growing interest in ecology due to global change, among other reasons.
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