Diversity and Flight Patterns of Caddisflies (Trichoptera) in an Atlantic Forest Fragment: Implications for Species Conservation in Threatened Ecosystems

IF 1.4 3区 农林科学 Q2 ENTOMOLOGY Neotropical Entomology Pub Date : 2024-04-30 DOI:10.1007/s13744-024-01149-2
Rafael Pereira, Gilberto Gonçalves Rodrigues, Adolfo Ricardo Calor, Simão Dias Vasconcelos
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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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大西洋森林片断中蝌蚪(蓟马)的多样性和飞行模式:对受威胁生态系统中物种保护的影响
人类活动已使大西洋林区(AF)锐减,并增加了淡水生物群的压力,例如鞘翅目,它是受当前昆虫减少影响最大的目。成虫的流动性对于在没有水源连接的新环境中定居至关重要。在这篇文章中,我们描述了一个保存下来的 AF 片段中与蝶形目功能性食性相关的蝶形目群落,并提供了有关水平和垂直飞行模式的经验数据。我们在巴西伯南布哥州的一条溪流中使用白片诱捕器和光诱捕器在不同距离和高度收集成虫。共收集到 5 个科 15 个物种的 2934 个标本,其中大部分是集滤器。水平飞行受到限制,80%的丰度集中在 20 米以下。在较高的地层观察到雌性比例偏高。物种的丰富度和丰度随着距离溪流的距离和高度的增加而降低。总体而言,Chimarra sp.和 Macrostemum scharfi 是优势物种。鞘翅目昆虫是作为水质生物指标的一个关键分类群,在这里,有关成虫的多样性和飞行模式的知识得到了扩展。在大西洋森林河流面临严重污染的情况下,成虫扩散数据可被纳入濒危状况评估和保护战略中。
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来源期刊
Neotropical Entomology
Neotropical Entomology 生物-昆虫学
CiteScore
3.30
自引率
5.60%
发文量
69
审稿时长
6-12 weeks
期刊介绍: Neotropical Entomology is a bimonthly journal, edited by the Sociedade Entomológica do Brasil (Entomological Society of Brazil) that publishes original articles produced by Brazilian and international experts in several subspecialties of entomology. These include bionomics, systematics, morphology, physiology, behavior, ecology, biological control, crop protection and acarology.
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