Itacaiúnas河支流大型无脊椎动物生物指数的适应性

IF 2 4区 环境科学与生态学 Q2 LIMNOLOGY
J.S. Oliveira , M.E.C. Liberal , C.P. Leão , M. Cruz , J. Martins , R.M. Siqueira , B.S. Godoy
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引用次数: 0

摘要

亚马逊地区的河流在维持生物多样性和提供生态系统服务方面发挥着关键作用,但它们很容易受到一系列人为影响。这项研究的目的是建立一个基于大型无脊椎动物群落的生物指数,以评估受到采矿和畜牧活动威胁的tapirapapm - aquiri国家森林地区溪流的生态完整性。在2022年和2023年两个旱季期间,对16条受到不同程度影响的河流进行了采样。大型无脊椎动物是用踢网收集器从落叶生境中收集的。通过适应生境完整性方案和综合干扰指数的计算,对环境条件进行了评价。最终指数由属丰富度、掠食者百分比和掠食者百分比组成。没有河流被列为“保存”,有七条河流被评为“可接受”,八条河流被评为“受影响”,一条河流被评为“严重受影响”。分析表明,采矿和畜牧业等活动与亚马逊河高海拔河流的环境退化密切相关。虽然该指数在交叉验证中显示出中等的准确性,但它被证明是一个有前途的热带地区环境质量监测工具。未来的研究应考虑纳入生境连通性和水文动态等其他因素,以提高该指数的敏感性,为保护政策提供支持。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Adaptation of the biotic index for macroinvertebrates in tributaries of the Itacaiúnas River
The streams in the Amazon region play a pivotal role in maintaining biodiversity and providing ecosystem services, but they are vulnerable to a range of anthropogenic impacts. The objective of this study is to develop a biotic index based on macroinvertebrate communities for the purpose of assessing the ecological integrity of streams in the Tapirapé-Aquiri National Forest, an area that is threatened by mining and livestock activities. Sampling was conducted in 16 streams with varying degrees of impact over the course of two dry seasons in years of 2022 and 2023. Macroinvertebrates were collected from leaf litter habitats using a kick-net collector. Environmental conditions were evaluated through the adapted habitat integrity protocol and the calculation of integrated disturbance indices. The final index was composed of: genus richness, percentage of predators, and percentage of scrapers. No stream was classified as "preserved", with seven streams rated as "acceptable", eight as "impacted", and one as "severely impacted". The analysis indicated that activities such as mining and livestock farming are strongly associated with environmental degradation of high-altitude streams in the Amazon. Although the index showed moderate accuracy in cross-validation, it proved to be a promising tool for monitoring environmental quality in tropical regions. Future studies should consider integrating additional factors, such as habitat connectivity and hydrological dynamics, to enhance the index's sensitivity and support conservation policies.
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来源期刊
Limnologica
Limnologica 环境科学-湖沼学
CiteScore
3.70
自引率
5.90%
发文量
64
审稿时长
3 months
期刊介绍: Limnologica is a primary journal for limnologists, aquatic ecologists, freshwater biologists, restoration ecologists and ecotoxicologists working with freshwater habitats.
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