Environmental and spatial processes influencing phytoplankton biomass along a reservoirs‐river‐floodplain lakes gradient: A metacommunity approach

Bortolini, Jascieli Carla; Pineda, Alfonso; Rodrigues, Luzia Cleide; Jati, Susicley; Velho, Luiz Felipe Machado

doi:10.1111/fwb.12986

Cited by 55 publications

(32 citation statements)

References 56 publications

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“…Sampling methodology and counting of planktonic ciliates were based on the methods described by Negreiros et al (). Phytoplankton sampling and biovolume determination were based on the procedure described by Bortolini, Pineda, Rodrigues, Jati, and Velho () and the phytoplankton size classification was based on methodology described by Kruk et al ().…”

Section: Methodsmentioning

confidence: 99%

High food availability linked to dominance of small zooplankton in a subtropical floodplain

Bomfim

Braghin

Bonecker

et al. 2018

Internat Rev Hydrobiol

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Zooplankton body size is fundamentally affecting productivity, ecosystem respiration, nutrient cycling, and energy transfer and may be controlled by food availability but also water physical and chemical characteristics. However, the differences in control of water physical and chemical characteristics and food availability on zooplankton body size have rarely been investigated in subtropical systems. We tested the hypotheses that: (i) the type of environment, food availability, and water physical and chemical characteristics would influence body size distribution in the Upper Paraná River floodplain and nearby subsystems and (ii) in environments with higher food availability, small‐sized organisms would predominate showing higher abundance, whereas the opposite would occur in environments with lower food availability. To test these hypotheses, we performed partial redundancy and redundancy analyses (RDA). Our results showed that food availability, Secchi depth, and suspended inorganic matter influenced the body size structure of rotifers and cladocerans. Additionally, we observed that greater food availability was related to greater abundance of organisms, which were dominated by small‐sized zooplankton (size classes C2 and C1 in rotifers, and class C2′ in cladocerans). It was possible to associate different zooplankton body size spectra with phytoplankton biovolume and planktonic ciliate abundance. We suggest that large‐bodied cladocerans could have a competitive advantage over rotifers and small‐sized cladocerans when resources are scarce, because the large‐sized group could explore a wider range of resource types.

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Section: Methodsmentioning

confidence: 99%

High food availability linked to dominance of small zooplankton in a subtropical floodplain

Bomfim

Braghin

Bonecker

et al. 2018

Internat Rev Hydrobiol

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“…However, the MBFG III and VII associated with large filamentous and colonial cyanobacteria did not present the highest biovolume at this site. Although the inocula exported by reservoirs can increase the phytoplankton biovolume of near downstream sites (Bovo-Scomparin et al, 2013;Bortolini et al, 2017), in our case, we believe the distance between the lake and the reservoir is far enough to avoid the influence of inocula export in the increase of the MBFG III and VII. In addition, local processes related to phosphorus availability, dissolved oxygen, and pH seem to be de main drivers of the filamentous and colonial algae in the studied sites (See MBFG III and VII in Figure 6).…”

Section: Discussionmentioning

confidence: 61%

“…rainy periods), lakes could present low phytoplankton biomass because of a higher dilution effect. In addition, the negative effect of washout on phytoplankton community of lakes could be higher in rivers located downstream the dams, because of its low contribution to diversity and poor nutrient input to the lakes (Bovo-Scomparin et al, 2013;Bortolini et al, 2017). However, morphometric characteristics of lakes like a larger area or a longer connectivity channel to the river can reduce the effect of the river input on planktonic communities (Walks & Cyr, 2004).…”

Section: Introductionmentioning

confidence: 99%

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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“…The damming of floodplains disrupts hydrological dynamics, changing the magnitude, frequency, duration, time, and rate of flows with potential effects on the dynamics, structure, and functioning of the entire ecosystem (Braghin et al., ; Castello & Macedo, ; Poff et al., ; Timpe & Kaplan, ). Thus, the relative importance of disturbance and the ecosystem processes altered by damming may vary over time (Bortolini, Pineda, Rodrigues, Jati, & Velho, ), especially where a strong flood pulse is present (Simões et al., ).…”

Section: Introductionmentioning

confidence: 99%

Damming interacts with the flood pulse to alter zooplankton communities in an Amazonian river

et al. 2019

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Flow modification of lotic ecosystems is one of the main threats to global freshwater biodiversity. Commonly, and in the river studied here, modification results from hydroelectric dam installation. We evaluated the impacts of damming on zooplankton communities in the Amazonian floodplain of the Madeira River (Porto Velho, Rondônia, Brazil) following construction in 2012 of the run‐of‐river dam of Jirau Hydroelectric Power Plant. Using data sampled between 2009 and 2015, we tested for discontinuities in zooplankton community composition attributable to damming and the naturally occurring flood pulse. The flood pulse remained the main predictor explaining variation in zooplankton community structure even with the installation of the dam on the Madeira River. Despite this, discontinuities for the entire zooplankton community and for the main compositional groups (testate amoebae, rotifers, cladocerans, and copepods) were detected in relation to the dam (pre‐/post‐dam periods), mainly in ebb and low water, and with weaker evidence of dam effects during flood and highwater hydrological periods. A multivariate regression tree explained 9.6% of the variation in zooplankton communities and identified four groups: (1) flood and high‐water periods; (2) low water post‐dam; (3) low water pre‐dam; and (4) ebb hydrological periods. The deviance in each multivariate regression tree node was attributable to variation in eight rotifer, three testate amoeba, and three copepod taxa. Our study demonstrates that the flood pulse, dam construction, and interaction between both of these factors affect zooplankton community structure in the Madeira River. While for many zooplankton community variables, effects occurred mainly during ebb and low‐water periods, some effects were also observed during high water and flood periods. We thus recommend the establishment of a permanent environmental monitoring programme during all hydrological periods in tropical floodplain rivers and the addition of sampling sites downstream from dams. Many rivers in the world are increasingly disrupted by multiple dams, yet little is known of their effects, especially for run‐of‐river dams. Our study identified short‐term impacts of only one run‐of‐river dam on zooplankton communities. More research is needed on the effects of multiple run‐of‐river dams on zooplankton and other biota, especially in tropical floodplain rivers, so that negative effects can be understood and ameliorated.

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Environmental and spatial processes influencing phytoplankton biomass along a reservoirs‐river‐floodplain lakes gradient: A metacommunity approach

Cited by 55 publications

References 56 publications

High food availability linked to dominance of small zooplankton in a subtropical floodplain

High food availability linked to dominance of small zooplankton in a subtropical floodplain

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

Damming interacts with the flood pulse to alter zooplankton communities in an Amazonian river

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