旧金山河跨流域调水水库的鱼类区系

IF 1 4区 环境科学与生态学 Q3 BIODIVERSITY CONSERVATION
Silvia Maria Millan Gutierre, Augusto Luís Bentinho Silva, Giancarlo Arraes Galvão, Luanny Rainy de Almeida Silva, Luiz Cezar Machado Pereira, Patricia Avello Nicola
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引用次数: 0

摘要

在巴西Caatinga地区等干旱地区,人们经常建造人工蓄水池来缓解水资源短缺。旧金山跨流域调水(SF-IWT)大型工程为此目的建造了许多人工水库。根据8年的监测样本,提供了一份SF-IWT水库的鱼类清单。收集工作每半年在28个水库进行一次,这些水库分为三组:东轴、北轴和格里斯特分支。SF-IWT水库共有47种,其中北轴46种,东轴27种,格里斯特支仅有7种。主要种类为麻属和慈属。3组水库呈现出不同的群落特征,水库年龄、丰富度和丰度是影响鱼类组成的相关变量。SF-IWT储层具有多样性和非均质性,具有典型的生态环境。SF-IWT水库的主要殖民者是来自旧金山供体盆地的鱼类,在这些地点人为释放的入侵物种,以及周围接收盆地的最终物种。正如积累曲线所显示的那样,持续的努力可以揭示额外的物种,长期定殖的模式,并有助于水库未来稳定阶段的数据。由于大多数水库中都存在入侵物种,以及有可能分散到接收盆地的原生物种,因此持续和详细的监测是管理规划和可能的影响评估的关键。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fish fauna of the São Francisco River Interbasin Water Transfer reservoirs
Abstract Artificial impoundments are frequently built to mitigate the water scarcity in the drylands such as the Caatinga region in Brazil. The São Francisco Interbasin Water Transfer (SF-IWT) megaproject implemented many artificial reservoirs for that purpose. A checklist of fish species from the SF-IWT reservoirs is provided based on samples from eight years of monitoring. The collections were conducted semiannually at 28 reservoirs divided into three groups: the East Axis, North Axis, and Agreste Branch. The SF-IWT reservoirs presented a total of 47 species, 46 were recorded in the North Axis, 27 in the East Axis, and only seven in the Agreste Branch. Characids and cichlids represented most of the species. The three analyzed groups of reservoirs presented distinct communities and the reservoirs’ age, richness and abundance were relevant variables responsible for fish composition. The SF-IWT reservoirs present a diverse and heterogeneous ichthyofauna, typical of lentic environments. The main colonizers of the SF-IWT reservoirs were fish from the São Francisco donor basin, invasive species anthropically released in those sites, and eventual species from the surrounding receiving basins. As the accumulation curves suggested, a continuous effort could reveal additional species, patterns in long-term colonization, and contribute to data on the reservoirs’ future stabilization phase. Since invasive species were present in most reservoirs, along with donor-basin native species with potential to disperse to the receiving basins, a continuous and detailed monitoring is key for management planning and possible impacts assessment.
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来源期刊
Biota Neotropica
Biota Neotropica BIODIVERSITY CONSERVATION-
CiteScore
2.90
自引率
16.70%
发文量
0
审稿时长
4-8 weeks
期刊介绍: BIOTA NEOTROPICA is an electronic, peer-reviewed journal edited by the Program BIOTA/FAPESP: The Virtual Institute of Biodiversity. This journal"s aim is to disseminate the results of original research work, associated or not to the program, concerned with characterization, conservation and sustainable use of biodiversity within the Neotropical region. Manuscripts are considered on the understanding that their content has not appeared, or will not be submitted, elsewhere in substantially the same form, because once published their copyrights are transferred to BIOTA NEOTROPICA as established in the Copyright Transfer Agreement signed by the author(s).
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