两种采样方法的大型无脊椎动物组合相似地区分了德克萨斯州南部不同生态系统状况的淡水湿地

IF 0.8 4区 环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES Aquatic Ecosystem Health & Management Pub Date : 2019-01-02 DOI:10.1080/14634988.2018.1505142
Leah M. Mcintosh, Alejandro Fierro-Cabo, Jude A. Benavides
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引用次数: 2

摘要

格兰德河下游的Resacas(次级河道、支流、牛轭湖)是受强烈人为压力的重要淡水湿地。许多湿地的水位得到了严格的管理,有些正在恢复。需要可靠的生物评价方法来有效区分不同生态状况的白蚁。水生生态系统生物评价的常见组成部分包括生物群落调查,其中大型无脊椎动物通常被认为是最准确的。大型无脊椎动物群落几乎没有文献记载,各种采样方法从未并行使用过。在这里,我们使用了两种流行的采样技术(底栖覆盖和浸网),同时制作了居住在resacas的大型无脊椎动物群落的第一幅肖像。尽管采样不同的无脊椎动物组合子集,但两种方法在研究的resacas中以相似的方式进行区分;然而,该覆盖具有几个优点,包括:1)更高的精度(基于变异系数),2)更充分地代表指示物种(入侵腹足动物),以及3)更清晰的功能摄食组差异,这构成了额外的指示度量。
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Macroinvertebrate assemblages from two sampling methods similarly discriminated freshwater wetlands with different ecosystem status in south Texas
Resacas of the lower Rio Grande River (secondary channels, distributaries, oxbow lakes) are vital freshwater wetlands under intense anthropogenic pressure. Many of these wetlands have their water levels tightly managed and some are being restored. Reliable bioassessment methods to effectively discriminate among resacas of differing ecological status are needed. Common components of bioassessments for aquatic ecosystems include surveys of biological communities, among which the macroinvertebrates are generally considered the most accurate. The macroinvertebrate community of resacas is virtually undocumented and various sampling methods have never been used in parallel. Here we used two popular sampling techniques (benthic corer and dip net), while producing the first portrait of the macroinvertebrate community inhabiting resacas. Despite sampling different invertebrate assemblage subsets, both methods discriminated among studied resacas in a similar manner; however, the corer presents several advantages including: 1) a much higher precision (based on coefficients of variation), 2) more adequate representation of an indicator species (invasive gastropod), and 3) clearer differences in functional feeding groups among resacas which constitutes an additional indicator metric.
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来源期刊
Aquatic Ecosystem Health & Management
Aquatic Ecosystem Health & Management 环境科学-海洋与淡水生物学
CiteScore
1.70
自引率
0.00%
发文量
1
审稿时长
18-36 weeks
期刊介绍: The journal publishes articles on the following themes and topics: • Original articles focusing on ecosystem-based sciences, ecosystem health and management of marine and aquatic ecosystems • Reviews, invited perspectives and keynote contributions from conferences • Special issues on important emerging topics, themes, and ecosystems (climate change, invasive species, HABs, risk assessment, models)
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