Community structure and concordance patterns among zooplankton life stages in subtropical temporary ponds

Freiry, Raquel Fontoura; Gouvea, Andressa; Becker, Stephan; Lansac‐Tôha, Fábio Amodêo; Pires, Mateus Marques; Stenert, Cristina; Maltchik, Leonardo

doi:10.1007/s10452-019-09740-1

Cited by 15 publications

(16 citation statements)

References 63 publications

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“…One possible explanation is that earlier studies were conducted in other ecosystems, ranging from reservoirs and tropical lakes to lagoons and rivers (Araújo et al, 2013; Bini et al, 2008; Santangelo et al, 2015; Perbiche‐Neves et al, 2019), which have different limnological profiles compared to seasonal ponds. Although a previous study showed that the beta diversity of hatchling communities was associated with the local predictors in the studied ponds (Freiry, Gouvea, et al, 2020), the composition of active communities showed low concordance with the hatchling communities in the region (Freiry, Gouvea, et al, 2020). This suggests that the composition of dormant communities was less influenced by the short‐term limnological conditions compared to active communities, likely due to their continuous accumulation in the sediment over time.…”

Section: Discussionmentioning

confidence: 69%

“…The experiment had a duration of 45 days (August–September 2017). The hatchlings were collected three times a week over this period to prevent reproduction (Freiry et al, 2020; Freiry, Weber, et al, 2020). Hatchling collection was performed with three consecutive sweeps on the surface water after kicking the sediment with a hand‐net of the same dimensions of the tray and 50‐μm mesh size.…”

Section: Methodsmentioning

confidence: 99%

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Ecological correlates of the alpha and beta diversity of zooplankton hatchling communities in seasonal subtropical ponds

Freiry

Pires

Gouvea

et al. 2021

Ecological Research

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Most zooplankton species inhabiting seasonal ponds produce dormant stages to overcome the dry seasons. Zooplankton specimens emerging from the sediment contribute to the ecological dynamics of these ecosystems, because they constitute important energy sources for higher trophic levels in aquatic food webs. In contrast to snapshot studies of the active communities, studying the ecological correlates of the distribution of the egg bank can help identify the potential drivers of zooplankton composition. We tested the association of local (habitat structure and water chemistry), climatic and spatial predictors with the alpha and beta diversity of zooplankton hatchling communities in subtropical seasonal ponds. Incubation experiments were conducted with sediment samples from 11 ponds distributed along an approximately 500‐km latitudinal gradient in southern Brazil. We assessed the patterns for the total community, Cladocera only and Rotifera only. The alpha diversity of the total community and Cladocera were primarily related to substrate heterogeneity. Annual rainfall and substrate heterogeneity jointly influenced the beta diversity of the total community. Annual rainfall solely influenced the beta diversity of Cladocera, while substrate heterogeneity influenced the overall beta diversity of Rotifera. Overall, the distinct relationships of the total hatchling community and Cladocera and Rotifera with the explanatory datasets suggest differing sensitivities of the zooplankton groups to impacts in habitat structure and climatic conditions in subtropical seasonal ponds.

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Section: Discussionmentioning

confidence: 69%

Section: Methodsmentioning

confidence: 99%

Ecological correlates of the alpha and beta diversity of zooplankton hatchling communities in seasonal subtropical ponds

Freiry

Pires

Gouvea

et al. 2021

Ecological Research

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“…Because the water used for crop irrigation comes from streams or permanent ponds, active zooplankton might have originally occurred in other flooded areas and then ended up in the rice fields via irrigation water. Another important point here is that active freshwater zooplankton richness in the region is three times higher than dormant stages (Freiry et al 2020). Although active zooplankton communities are species rich, some studies have showed some degrees of functional redundancy in the species pool (Thompson & Shurin 2012;Benedetti et al 2019).…”

Section: Discussionmentioning

confidence: 88%

“…However, the richness of taxa in our study was similar to that found in other experiments with longer incubation periods in similar habitats (18-25 spp. ;Araújo et al 2013;Avila et al 2015;Freiry et al 2020). Although the emergence of zooplankton might be a good indicator that communities are resilient to stressors in the rice fields, this must be heeded cautiously.…”

Section: Discussionmentioning

confidence: 99%

Using topsoil translocation from natural wetlands to restore rice field systems

Silva

Moreira

Vendramin

et al. 2021

Restoration Ecology

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Wetlands provide vital habitat for biodiversity and relevant ecosystem services to human population. The rapid transformation of freshwater wetlands to grow food crops became the wetlands strongly threatened by human activities. Restoration efforts related to wetlands have been widely attempted; however, science-based guidelines are relatively scarce. Here, we analyzed whether different levels of topsoil addition from natural wetlands in the sediment from rice fields influence the zooplankton communities. Our hypothesis was that the richness and abundance of hatchlings would be higher in treatments with high topsoil addition from natural wetlands, followed by treatments with low addition. In the laboratory, eight field sediment samples were incubated for zooplankton hatching in four treatments: rice fields, rice fields added with low (5%) and medium (30%) quantities of sediment from natural wetlands, and natural wetlands. A total of 4,493 hatchlings belonging to 24 taxa were observed in the experiment. While zooplankton richness and abundance did not differ between sediment treatments, significant differences in species composition associated with topsoil addition were observed. SIMPER analysis showed that topsoil addition from natural wetlands enhanced the abundance of cladocerans and larval copepods. Our results showed that sediments from natural wetlands have a bank of zooplankton dormant eggs that can help the recovery of wetlands disturbed by rice fields. The addition of natural wetland sediments in areas disturbed by rice fields modifies the zooplankton composition of the rice fields, aiding the recovery of disturbed natural wetlands for rice production.

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“…Hatching time of resting eggs, as well as population growth and passive community structure, can be evaluated by laboratory experiments, simulating natural flooding after a drought event (Bhusnale et al, 2016;Freiry et al, 2020), because factors such as temperature and photoperiod can be controlled. Rehydration of temporary pool sediment is a common method to study various ecological aspects of resting eggs in several aquatic invertebrate groups, especially in crustaceans (e.g., branchiopods) (Bhusnale et al, 2016;Brendonck & De Meester, 2003).…”

Section: Introductionmentioning

confidence: 99%

Species' traits and taxonomic distance can predict the hatching phenology of ostracod (Crustacea) resting eggs from tropical floodplain lakes

et al. 2021

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Freshwater ostracods are commonly found in temporary ponds and lakes, surviving drought periods by producing resting eggs. We investigated the hatching phenology of ostracod resting eggs from the sediments of temporary floodplain lakes, considering both the taxonomic distance between species and their functional traits, such as carapace size (length and height) and shape, valve ornamentation, and reproductive mode. In addition, we tested the hypotheses: (1) that the hatching time is more similar between congeneric ostracod species than between noncongeneric species; (2) that differences in hatching time between congeneric species are often related to differences in functional traits; (3) that both species composition and functional traits composition of hatchlings change over the incubation time, but with a reduction in the variability over time. The experiment was conducted for 98 days in the laboratory, and the microcosms were monitored weekly. The first hatching of an ostracod was recorded during the second week of incubation after hydration of the sediments. A total of 12 ostracod species hatched, belonging to the families Cyprididae and Candonidae. The above three hypotheses were corroborated. The time between inundation and first hatching was mostly similar for congeneric species in the genus Chlamydotheca, but was different between some species of Strandesia, which might be owing to differences in functional traits. The species composition and functional trait composition of the hatched ostracods were significantly different over the 14 weeks of incubation due to the different hatching phenology of different species. Furthermore, our results show that both taxonomic distance and functional traits can influence the hatching time of ostracod resting eggs from temporary floodplain lakes. Thus, future studies addressing the hatching phenology of ostracod resting eggs (and resting stages from other invertebrates) should also emphasize the use of functional traits.

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Community structure and concordance patterns among zooplankton life stages in subtropical temporary ponds

Cited by 15 publications

References 63 publications

Ecological correlates of the alpha and beta diversity of zooplankton hatchling communities in seasonal subtropical ponds

Ecological correlates of the alpha and beta diversity of zooplankton hatchling communities in seasonal subtropical ponds

Using topsoil translocation from natural wetlands to restore rice field systems

Species' traits and taxonomic distance can predict the hatching phenology of ostracod (Crustacea) resting eggs from tropical floodplain lakes

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