Abstract
Anthropogenic activities have decimated the Atlantic Forest domain (AF) and increased the pressure on freshwater biota, such as Trichoptera, which is the most affected order by the current insect decline. Adult mobility is crucial for the colonisation of new environments unconnected by water sources. In this article, we describe the assemblage of caddisflies in a preserved AF fragment related to their functional feeding group and provide empirical data on the patterns of horizontal and vertical flight. Adults were collected using white sheet and light attraction traps, placed at different distances and heights from a stream in Pernambuco, Brazil. A total of 2934 specimens of 15 species from five families were collected, mostly collector-filterers. Horizontal flight was limited, with 80% of the abundance concentrated up to 20 m. Vertical stratification was also concentrated at lower heights. A female-biased proportion was observed at higher strata. The richness and abundance of species decreased with increasing distances and heights from the stream. Overall, Chimarra sp. and Macrostemum scharfi were the dominant species. Trichoptera is a key taxon used as a biological indicator of water quality, and here, knowledge on the diversity and flight patterns of adults is expanded. At the risk of intensive pollution of rivers in Atlantic forests, data on the adult dispersal can be incorporated in the assessment of endangerment status and in conservation strategies.
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Data Availability
The specimens are deposited in the Museum of Natural History of Bahia of the Federal University of Bahia (UFBA) and in the Entomological Collection of the Department of Zoology of the Federal University of Pernambuco (CEUFPE).
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Acknowledgements
We thank the Instituto Chico Mendes de Conservação da Biodiversidade (ICMBio) for collecting permits. ARC and SDV acknowledge the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) (under Grants 307794/2015-6 and 303623/2015-2, respectively). RP acknowledges CNPq and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) for the Master Scholarship (under Grant 134201/2018-3 GM). Thanks are also due to the Programa de Apoio a Pós-Graduação (PROAP-CAPES). This study was partly financed by the CAPES–Finance Code 001.
Funding
ARC and SDV acknowledge the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) (Grants 307794/2015–6 and 303623/2015–2, respectively). RP is grateful to CNPq and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) for the Master Scholarship. Thanks are also due to the Programa de Apoio a Pós-Graduação (PROAP-CAPES). This study was partially financed by CAPES–Finance Code 001 and was part of the M.Sc. dissertation of the first author.
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Substantial contributions to the conception or design of the work; or interpretation of data: RP, ARC, GGR, SDV. Substantial contributions to the acquisition, analysis or interpretation of data for the work: RP. Drafting the work or reviewing it critically for important intellectual content: RP, ARC, GGR, SDV. Final approval of the version to be published: RP, ARC, GGR, SDV. Agreement to be accountable for all aspects of the work: RP, ARC, GGR, SDV.
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Author SDV is an Associate Editor for Neotropical Entomology and the peer-review process for this article was independently handled by another member of the journal editorial board.
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Pereira, R., Rodrigues, G.G., Calor, A.R. et al. Diversity and Flight Patterns of Caddisflies (Trichoptera) in an Atlantic Forest Fragment: Implications for Species Conservation in Threatened Ecosystems. Neotrop Entomol 53, 596–607 (2024). https://doi.org/10.1007/s13744-024-01149-2
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DOI: https://doi.org/10.1007/s13744-024-01149-2