Land use changes disrupt streams and affect the functional feeding groups of aquatic insects in the Amazon

Lima, Myllena; Firmino, Viviane Caetano; Paiva, Carina Kaory Sasahara de; Juen, Leandro; Brasil, Leandro Schlemmer

doi:10.1007/s10841-022-00375-6

Cited by 26 publications

(10 citation statements)

References 68 publications

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“…Land use can transform landscapes and alter species composition, ultimately changing the trophic structure of freshwater environments [38,60], however, here, the forest cover (a proxy for land use) did not change the composition of zooplankton functional guilds, as expected. On the other hand, the distribution of zooplankton functional guilds in Amazon streams was determined by local environmental variables related to the feeding strategies (canopy cover, suspended solids, and phosphorus), corroborating our second hypothesis.…”

Section: Discussionsupporting

confidence: 62%

“…Also, small-bodied cladocerans such as scraper feeders can substitute algae for organic particles (1-15 μm) as a food source, when algal production is low, giving them an advantage in this scenario [28]. Some studies with macroinvertebrates' trophic structure have also reported similar findings, where there is a predominance of organisms that feed on small organic particulate matter in streams under greater riparian forest and canopy cover [38,60,69,70].…”

Section: Plos Onementioning

confidence: 81%

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How are zooplankton’s functional guilds influenced by land use in Amazon streams?

Bomfim,

Deosti,

Louback-Franco

et al. 2023

PLoS ONE

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Amazon streams present great biodiversity and offer several ecosystem services, but these systems are threatened by multiple land uses. The changes created by land use are expected to drive the composition of species, ultimately changing the trophic relationships of several biological groups, including zooplankton. We investigated if land use changes the composition of zooplankton functional guilds in Amazon streams and which are the local (physical-chemical) variables driving the zooplankton functional guilds in the land-use gradient. Zooplankton and physical-chemical variables were sampled in 17 water bodies in the municipality of Barcarena, Pará, Brazil in 2018 and 2019, five sampling sites were in the Pará River and 12 in streams. Forest cover (a proxy for land use) was determined through digital image processing and converted in percentage. Zooplankton species were classified into five functional guilds (filter, raptorial, scraper, suctor, and predator feeders). We recorded 98 zooplankton taxa and filters were the most abundant functional guild. The composition of zooplankton functional guilds did not change in the land use gradient. However, the distribution of zooplankton functional guilds in Amazon streams was determined by local environmental variables related to the feeding strategies. Scraper-feeders (cladocerans) were positively related to greater canopy cover, suctor-feeders and predator-feeders (both rotifers) were related to greater total phosphorus, whereas filter-feeders (rotifers, cladocerans, and copepods) and raptorial (copepods) were related to total suspended solids. This study brings new information about zooplankton in Amazon streams that are under-studied. The functional approach clarifies the patterns observed and reflects the trophic relationships in which the zooplankton community is involved in streams under a degree of land use, i.e., scraper-cladocerans can represent more preserved streams under greater canopy cover, whereas the other functional guilds were related to variables that can represent more altered streams.

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Section: Discussionsupporting

confidence: 62%

Section: Plos Onementioning

confidence: 81%

How are zooplankton’s functional guilds influenced by land use in Amazon streams?

Bomfim,

Deosti,

Louback-Franco

et al. 2023

PLoS ONE

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“…Despite these discrepancies with other states and regions of Brazil, there are very positive initiatives happening in the Amazon, such as, for instance, a faunal inventories study of Ephemeroptera in the municipality of Santarém, Pará, which has brought considerable advances in the knowledge of species diversity in the region, with 13 new records for the state and the description of a new species (de Oliveira et al, 2023). Although the number of ecological studies on the order Ephemeroptera in the Northern region has increased significantly (Cardoso et al, 2015; Enríquez‐Espinosa et al, 2020; Lima et al, 2022; Rivera‐Pérez et al, 2023; Shimano & Juen, 2016; Shimano et al, 2021), most of these studies use the aquatic immature phase and restrict taxonomic identification to the genus level. This is due to limitations in nymph identification, such as a lack of trained taxonomists, a high number of unknown species, small body size and different instars in the nymphs, making it challenging to accurately distinguish species (Cardoso et al, 2023; Gomes et al, 2022), especially when conducted by non‐specialists.…”

Section: Discussionmentioning

confidence: 99%

Linnean and Wallacean shortfalls of Leptophlebiidae (Ephemeroptera: Insecta) in the Brazilian Amazon

Lima,

Salles,

de Andrade

et al. 2024

Aquatic Conservation

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One of the primary challenges in biodiversity conservation is the limited knowledge of the taxonomy and geographical distribution of species, particularly in megadiverse regions such as the Amazon In this context, the present study aimed to mitigate the Linnean and Wallacean shortfalls within the Family Leptophlebiidae (Ephemeroptera: Insecta) in the Brazilian Amazon, identify priority areas for conducting faunal inventories and enhance taxonomic knowledge of this group. Utilizing both primary Leptophlebiidae data collected in the state of Pará, and secondary data compiled from the literature on species occurring in the Amazon, we employed Species Distribution Modelling to identify areas with higher potential species richness and priority areas for faunal inventories in the Brazilian Amazon of the family. For the primary data, 2,120 specimens were identified, representing 16 genera and 28 species. Among the 28 species analysed, 7 constitute new records for the state of Pará. Additionally, two new genera, five new species and six morphospecies were identified, significantly expanding the taxonomic landscape of the family in the state. Maps depicting potential species richness and priority areas for faunal inventories in the Brazilian Amazon generated from the Modelling indicated that the states of Pará and the western region of Maranhão exhibit high potential species richness, with overlapping areas identified as priorities for Leptophlebiidae faunal inventories. In this context, this study represents a substantial advancement in the taxonomic knowledge of Leptophlebiidae in the state of Pará and the Amazon, underscoring the urgency of research and biodiversity conservation efforts for the group in the region. Furthermore, the identification of new taxa emphasizes the need for ongoing collaborative efforts to mitigate Linnean and Wallacean shortfalls.

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“…The Adolpho Ducke Forest Reserve is a neighbor to the city of Manaus, which may be a driver of water characteristics of streams. As Lima et al (2022) showed, water temperature and other environmental variables affect functional feeding groups of aquatic insects. The streams of the Cerrado were most influenced by altitude, pH, turbidity, DO, and current velocity.…”

Section: Influence Of the Biome On Species Distributionmentioning

confidence: 99%

Diversity of cellulolytic and xylanolytic fungi associated with the digestive tract of aquatic insect larvae in streams of the Amazon Forest and Cerrado in Brazil

2022

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The study of the relationship between fungi and insects brings important contributions to the knowledge of fungal biodiversity and to the understanding of mutualistic ecological interactions. This study reports the occurrence of a community of filamentous fungi in the digestive tract (DT) of mining insect larvae belonging to genus Stenochironomus in streams of two Brazilian biomes. Fungi were obtained from the digestive tract of larvae found on trunks and leaves of low-order streams in the Amazon Forest and Cerrado in the north of Brazil. The fungal community was screened for xylanolytic and cellulolytic activities. The diversity of fungal species in the DT of larvae is possibly related to the diversity of diets of species of that genus and the diversity of substrates in the ecosystems. The diversity and richness of fungal species were influenced by ecological differences between locations more than by the types of substrates in which they were collected (trunk and leaf). Most fungi in the DT of Stenochironomus larvae sampled in leaves exhibited cellulolytic enzyme activity. Such results stress that the mycobiomes of the DT of Stenochiromonus larvae produce enzymes that contribute to the process of breaking down plant remains in their hosts.

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Land use changes disrupt streams and affect the functional feeding groups of aquatic insects in the Amazon

Cited by 26 publications

References 68 publications

How are zooplankton’s functional guilds influenced by land use in Amazon streams?

How are zooplankton’s functional guilds influenced by land use in Amazon streams?

Linnean and Wallacean shortfalls of Leptophlebiidae (Ephemeroptera: Insecta) in the Brazilian Amazon

Diversity of cellulolytic and xylanolytic fungi associated with the digestive tract of aquatic insect larvae in streams of the Amazon Forest and Cerrado in Brazil

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