Drivers of phytoplankton richness and diversity components in Neotropical floodplain lakes, from small to large spatial scales

Moresco, Geovani Arnhold; Bortolini, Jascieli Carla; Dias, Juliana Déo; Pineda, Alfonso; Jati, Susicley; Rodrigues, Luzia Cleide

doi:10.1007/s10750-017-3214-3

Cited by 30 publications

(18 citation statements)

References 80 publications

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“…The high phytoplankton richness and biovolume registered in the studied lakes are typical of floodplain lakes (Moresco et al, 2017). Floodplain lakes present high water retention time and, in our case, high nutrients and light availability that favor the establishment and development of several phytoplankton species.…”

Section: Discussionsupporting

confidence: 50%

Rivers affect the biovolume and functional traits of phytoplankton in floodplain lakes

et al. 2017

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Aim:We analyzed the temporal distribution (dry and rainy periods) of phytoplankton functional groups (biovolume) from lakes connected to dammed (S1 -Paraná River) and non-dammed rivers (S2 -Baia River and S3 -Ivinhema River) in the upper Paraná River floodplain, Brazil. We also determined the drivers of the phytoplankton community assemblage. Methods: Phytoplankton and environmental variables samplings were performed quarterly in dry (2000 and 2001) and rainy (2010 and 2011) periods. We classified the phytoplankton species into seven morphological based functional groups (MBFG). We used analysis of variance to test differences in total phytoplankton biovolume and MBFGs biovolume between lakes and climatic periods. We also used redundancy analysis to determine the MBFGs-environment relation. Results: The lake related to the dammed river (S1) presented the lowest species richness. The total phytoplankton biovolume presented differences among the lakes, but we did not register temporal differences associated with water level variation. The lake related to the non-dammed and semi-lentic river (S2) presented the highest biovolume, while S1 (related to the dammed river) and S3 (related to the non-dammed river) exhibited the lowest ones. Filamentous organisms (MBFG III) were associated with poor nutrient conditions and diatoms (MBFG VI) were favored in high water mixing sites. The flagellate groups MBFG II and MBFG V were related to deeper water and lower column mixing conditions, respectively. Conclusions: Our results suggest that phytoplankton species with different functional traits drive the primary productivity in the dry and rainy periods. Hence, we highlight the importance of maintaining high functional 2 Pineda, A. et al.

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Section: Discussionsupporting

confidence: 50%

Rivers affect the biovolume and functional traits of phytoplankton in floodplain lakes

et al. 2017

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“…That is, as traits of a given species determine whether or not they can colonize new habitats, the community structure of an ecosystem is closely related to its spatial configuration. Despite the long‐standing but contested claim that unicellular organisms are only driven by local environmental filters due to large population densities and highly efficient dispersal (Finlay, ), major advances have been made indicating the importance of both niche and dispersal‐assembly theories in explaining the spatial distributions of micro‐organisms in aquatic and terrestrial systems (Barberán & Casamayor, [bacteria]; Viana et al., [microcrustaceans]; Moresco et al., [phytoplankton]; Heino et al., [diatoms]; Lara, Roussel‐Delif, Fournier, Wilkinson, & Mitchell, [testate amoeba]).…”

Section: Introductionmentioning

confidence: 99%

“…Yet, studies in tropical South America are often restricted to a single geographical region (e.g. Ecuador lakes: Steinitz‐Kannan, Colinvaux, & Kannan, ; Amazon rivers: Moresco et al., ; Wetzel et al., ; Zorzal‐Almeida, Soininen, Bini, & Bicudo, ), and the majority emphasize taxonomic descriptions (Morales, Vis, & Fernández, ; Oliveira & Steinitz‐Kannan, ; Tapia, Theriot, Fritz, Cruces, & Rivera, ). Since the pioneering work on species richness–area relationship of plankton in lakes of Ecuador by Steinitz‐Kannan (), the biogeographic patterns of diatoms in the tropical Andes and the adjacent lowland freshwaters have been barely studied, although these ecosystems act as sentinels of global environmental change (Metzeltin & Lange‐Bertalot, ), such as climate warming (Vuille, Bradley, Werner, & Keimig, ) and eutrophication (Van Colen et al., ).…”

Section: Introductionmentioning

confidence: 99%

Geo‐climatic factors drive diatom community distribution in tropical South American freshwaters

et al. 2018

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Patterns that maintain and generate biodiversity of macro‐organisms in the Neotropics are widely discussed in the scientific literature, yet the spatial ecology of micro‐organisms is largely unknown. The unique character of the tropical Andes and adjacent Amazon lowlands generates a wide gradient of environmental conditions to advance our understanding of what drives community assembly and diversity processes. We analysed the distribution patterns of benthic diatoms (unicellular siliceous algae) as a model group of microbial passive dispersers, including predictors that describe limnological and geo‐climatic gradients for a total of 113 waterbodies (0–28°S and 58–80°W), including lakes and streams. Complementary multivariate statistical analyses were performed to correlate (1) community composition and (2) diatom species richness with environmental and spatial factors to infer niche‐based and dispersal‐based assembly processes, respectively. Results showed that two gradients structured both diatom assemblages and waterbodies, namely climate and landscape configuration. Variance partitioning revealed that broadscale spatial variables (distance‐based Moran's Eigenvectors) outperformed the two environmental components (limnological and geo‐climatic), suggesting dispersal‐assembled communities. However, diatom assemblages were structured by geo‐climatic (regional) factors in certain lakes in the northern and central Andes, although their effects were partially manifested via local variables after the geographical distances were factored out. In a similar way, climatic and topographic structuring homogenized lake and stream communities within ecoregions, as indicated by the strong overlap between the two community types and the weak correlation between biota and limnological variables. Notably, a significant increase in diatom species richness was related to increased water connectivity, interpreted to indicate that a decrease in the remoteness of the system increase species number. Synthesis. We emphasize the strength of macroecological gradients (landscape configuration and climatic factors) in affecting both diatom diversity and community composition in the South American tropics. In this context, our results and the commonalities of ecoregion patterning with groups of macro‐organisms (vegetation) suggest the need to integrate microbial ecology into a macroecology framework to unravel mechanisms behind diversity gradients.

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“…In fact, the FGs indicators of the trophic state that we registered were organisms mostly associated with lentic conditions. Moreover, lakes present large water-retention time that favors the establishment and development of phytoplankters and could explain why more FGs were related to lakes than to rivers (Margalef, 1978;Bortolini et al, 2014;Török et al, 2016;Moresco et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

Phytoplankton functional groups indicators of environmental conditions in floodplain rivers and lakes of the Paraná Basin

et al. 2017

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Aim: The objective of this study was to evaluate the efficacy of phytoplankton functional groups as indicators of environmental conditions in floodplain rivers and lakes with different trophic state and connectivity degree to the Paraná River. Phytoplankton functional groups (FGs) cluster sensitive species to environmental variation and can be an alternative for environmental monitoring. Methods: Samples were performed quarterly from 2010 to 2013 in the Ivinhema, Paraná and Baia Rivers and in three lakes permanently connected to each river. Results: 419 taxa were identified, and those taxa that had values greater than 5% of the total biovolume were classified into FGs (P, C, A, B, MP, H1, W1, J, TD, L O , and N). The lakes presented higher biovolume and were more productive than rivers, especially in the dry periods. The rivers presented light limitation and low phytoplankton development. The FG L O was an indicator in rainy seasons. Both rivers and lakes were mostly oligotrophic. We registered FG indicators only for the lakes (A, B, C, E, L O , P, and W1) and mesotrophic environments (A, B, C, E, J, L O , and P). Conclusion: The FGs reflected the seasonal variation and the trophic state of environments in the upper Paraná River floodplain, mainly in the lentic environments. The species-environment relationship (FGs as indicators) was clearer in the lakes, probably because of the longer water retention that allows evidencing the response of the phytoplankton community to environmental factors. On the other hand, the absence of FGs as indicators in the rivers could be due to the high water flow that promotes dispersal stochasticity and masks the relationship between the environmental factors and the phytoplankton community. Thus, phytoplankton FGs proved to be a viable tool to evaluate the environmental conditions in a floodplain.

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Drivers of phytoplankton richness and diversity components in Neotropical floodplain lakes, from small to large spatial scales

Cited by 30 publications

References 80 publications

Rivers affect the biovolume and functional traits of phytoplankton in floodplain lakes

Rivers affect the biovolume and functional traits of phytoplankton in floodplain lakes

Geo‐climatic factors drive diatom community distribution in tropical South American freshwaters

Phytoplankton functional groups indicators of environmental conditions in floodplain rivers and lakes of the Paraná Basin

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