Temporal variation in phytoplankton beta diversity patterns and metacommunity structures across subtropical reservoirs

Wojciechowski, Juliana; Heino, Jani; Bini, Luis Maurício; Padial, André Andrian

doi:10.1111/fwb.12899

Cited by 67 publications

(32 citation statements)

References 75 publications

(118 reference statements)

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“…In this case, our results indicated that environmental and spatial dynamics were temporally structured, directly influencing RFG biomass. Such assessments are in line with other studies that corroborate that the metacommunity organisation varies over time (Wojciechowski et al ).…”

Section: Discussionsupporting

confidence: 92%

“…The spatial signal has already been strongly related to the dispersal capacity of organisms and to the spatial scale considered (Padial et al ; Santos et al ; Moresco et al ; Chaparro et al ). The fact that the spatial component contributes more to community variation suggests that the distance between lakes was important for the structuring of the flagellate mixotrophic metacommunity (suggesting that it is in accordance with the mass‐effects model) and that this influence may change over time (Wojciechowski et al ). However, we emphasise that this ‘spatial signal’ may be related to spatially structured abiotic or biotic variables, or yet, to unmeasured variables (e.g.…”

Section: Discussionmentioning

confidence: 85%

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A functional deconstructive approach to mixotrophic phytoplankton responds better to local, regional and biogeographic predictors than species

et al. 2019

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The use of deconstructive approaches, such as functional classification models, can be an important tool for understanding aquatic systems. This study aimed to evaluate the distribution and community structure of mixotrophic flagellates in lakes of four large Brazilian floodplain systems, those of Amazon River, Araguaia River, Pantanal and upper Paraná River, in contrasting hydrological periods. A partial redundancy analysis (pRDA) was used to estimate the relative roles of environmental, spatial and biogeographic factors on both the entire community and a deconstructive approach using Reynolds' mixotrophic flagellate functional groups (RFGs). High environmental variability was found between the rainy and dry periods, mostly for the Amazon floodplain system. We identified 135 taxa and seven RFGs of mixotrophic flagellates: E, Lo, Q, W1, W2, Ws and Y. A permanova evidenced that biomass of mixotrophic flagellate RFGs reflected differences among floodplains and between hydrological periods. Our results showed that the use of RFGs better summarises the mixotrophic phytoplankton metacommunity structure when compared to the use of the entire community. The pRDA showed that explanatory matrices explained up to 37% of variation in the community. Environmental, spatial and biogeographic factors were important to explain the structure of the mixotrophic flagellates; however, the importance of the different components seemed to depend on the hydrological period and the traits of each RFG.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 85%

A functional deconstructive approach to mixotrophic phytoplankton responds better to local, regional and biogeographic predictors than species

et al. 2019

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“…Anti-nested patterns dominated by species replacements have appeared frequently in freshwater studies employing the Leibold and Mikkelson (2002) analysis framework (Bried et al 2015, Heino et al 2015, Dallas et al 2016, Erös et al 2017, Wojciechowski et al 2017), but most of these studies involve dispersal-connected situations, i.e. metacommunities.…”

Section: Lack Of Nestedness and Checkerboardsmentioning

confidence: 99%

Opportunistic data reveal widespread species turnover in Enallagma damselflies at biogeographical scales

Bried

Siepielski

2017

Ecography

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An information tradeoff exists between systematic presence/absence surveys and purely opportunistic (presence‐only) records for investigating the geography of community structure. Opportunistic species occurrence data may be of relatively limited quality, but typically involves numerous observations and species. Given the quality–quantity tradeoff, what can opportunistic data reveal about spatial patterns in community structure? Here we explore opportunistic data in describing geographic patterns of species composition, using over 4600 occurrence records of Enallagma damselflies in the United States. We tested phylogenetic scale (genus level, Enallagma major clades, Enallagma subclades) and spatial extent (U.S. vs watershed regions), hypothesizing that nonrandom structure is more likely at larger spatial extents. We also used three sets of systematic presence/absence surveys as a benchmark for validating opportunistic presence‐only records. Null model analysis of matrix coherence and species replacements showed many cases of nonrandom structure and widespread species turnover. This outcome was repeated across spatial and environmental gradients and community composition scenarios. Turnover dominated across the U.S. and two watersheds spanning biogeographic boundaries, but random assemblages were prevalent in a third watershed with limited longitudinal extent. Turnover also pervaded each level of phylogeny. Opportunistic presence‐only datasets showed identical patterns as systematic presence/absence datasets. These results indicate that extensive opportunistic data can be used to detect species turnover, especially at geographic scales where range margins are crossed.

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“…Dams can reduce the hydrological connectivity among neighbouring habitats or, inversely, enhance the connectivity, allowing the dispersal of species beyond their natural range (Havel, Lee, & Vander Zanden, ; Johnson, Olden, & Vander Zanden, ). For example, reservoir construction may contribute to biotic homogenisation by reducing the heterogeneity or complexity of habitats and circumventing natural biogeographical filters (Petsch, ; Rahel, ; Simões, Dias, et al., ; Vitule, Skóra, & Abilhoa, ) and through increasing the primary productivity (Wojciechowski, Heino, Bini, & Padial, ). Consequently, it is also expected that such an impact of dams affects the β‐diversity in downstream river–floodplain systems (Bozelli, Thomaz, Padial, Lopes, & Bini, ).…”

Section: Introductionmentioning

confidence: 99%

“…For example, reservoir construction may contribute to biotic homogenisation by reducing the heterogeneity or complexity of habitats and circumventing natural biogeographical filters (Petsch, 2016;Rahel, 2002;Simões, Dias, et al, 2013;Vitule, Sk ora, & Abilhoa, 2012) and through increasing the primary productivity (Wojciechowski, Heino, Bini, & Padial, 2017). Consequently, it is also expected that such an impact of dams affects the b-diversity in downstream river-floodplain systems (Bozelli, Thomaz, Padial, Lopes, & Bini, 2015).…”

Section: Introductionmentioning

confidence: 99%

Effects of dams decrease zooplankton functional β‐diversity in river‐associated lakes

et al. 2018

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In river–floodplain systems, the construction of dams causes environmental changes in the natural dynamics of rivers and the associated wetlands, which can affect both the taxonomic and functional composition of communities, and, consequently, ecosystem functioning. We evaluated zooplankton taxonomic and functional β‐diversity in sets of lakes associated with a preserved and a dammed river in a Neotropical floodplain. We expected that both β‐diversity measures would be lower in lakes associated with a dammed river than in lakes associated with a preserved river. β‐Diversity was partitioned into turnover and nestedness components, through multiple‐site dissimilarity measures, and compared with expected null models. We expected that nestedness would be more important for both the β‐diversity measures in lakes associated with the dammed river, whereas species and trait turnover would be more important in lakes associated with the preserved river. Functional β‐diversity was higher among lakes of the preserved river than of the dammed river, while taxonomic β‐diversity was not different between the rivers. Contributions of turnover and nestedness components were similar in the preserved river, whereas that of nestedness was higher in the dammed river, revealing the loss of extreme trait combinations from the functional space. Comparisons between observed and expected β‐diversity revealed a higher trait turnover than would be expected by species turnover in the preserved river, and no differences from the null models were observed in lakes associated with the dammed river. Our results suggest that dissimilarity in trait composition is influenced more by environmental changes associated with river damming than by dissimilarity in species composition such that a functional homogenisation occurs without a change in taxonomic β‐diversity. We propose the maintenance of preserved tributaries in floodplains, which sustain environmental heterogeneity, primarily if the nearby environments are already dammed. Furthermore, we reinforce the necessity of a pluralistic approach, considering both taxonomic and functional aspects of biodiversity in ecosystem management.

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Temporal variation in phytoplankton beta diversity patterns and metacommunity structures across subtropical reservoirs

Cited by 67 publications

References 75 publications

A functional deconstructive approach to mixotrophic phytoplankton responds better to local, regional and biogeographic predictors than species

A functional deconstructive approach to mixotrophic phytoplankton responds better to local, regional and biogeographic predictors than species

Opportunistic data reveal widespread species turnover in Enallagma damselflies at biogeographical scales

Effects of dams decrease zooplankton functional β‐diversity in river‐associated lakes

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