亚热带洪泛平原湖泊古湖泊记录中硅藻功能特征的简化与替换

IF 1.4 4区 环境科学与生态学 Q3 LIMNOLOGY
Ruwer, Daiane Trevisan, Rodrigues, Liliana
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引用次数: 1

摘要

利用功能性状是获取生态群落和生态系统过程的有效途径;因此,硅藻的功能特征在古湖泊学研究中的应用越来越广泛。本研究以garas湖和Patos湖为研究对象,分析了受水坝影响程度不同的亚热带洪泛平原两个湖泊沉积硅藻功能特征丰度的变化。计算硅藻群落功能多样性和功能β分解。从每个环境中收集了一个岩心,并使用了大约50年的样本。从功能多样性结果来看,两个湖泊表现出不同的格局,其中加尔帕拉斯湖的功能差异较大。通过功能β多样性结果,湖泊显示出相似的结果。加尔帕拉达斯湖和帕托斯湖的功能多样性值和性状替代值在1980年代以后和2008年以后均呈下降趋势。在这些时期,两种环境都表现出与高湍流和低水位相关的相同功能类别的优势。研究结果表明,这两个湖泊的水文变化可能是由靠近洪泛区的水坝造成的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Simplification and replacement of diatom functional traits from a subtropical floodplain lakes paleolimnological records

An effective way to access processes of ecological communities and ecosystems is the use of functional traits; therefore, the use of the functional characteristics of diatoms in paleolimnological works has been growing. In this study, the variations in the abundance of functional traits of sedimentary diatoms were evaluated in two lakes (Garças Lake and Patos Lake), from a subtropical floodplain, which present different intensities of influence of dams. Diatom community functional diversity and functional beta decomposed were calculated. A core from each environment was collected and samples of approximately 50 years were used. According to the functional diversity results, the two lakes showed different patterns, with a greater functional variation in Garças Lake. Through functional beta diversity results, the lakes showed similar results. Both showed a reduction in the functional diversity values and substitution of traits, after the 1980s in Garças Lake, and after ~ 2008 in Patos Lake. In these periods, both environments showed dominance of the same functional categories related to high turbulence and lower waters. The results suggest hydrological changes in the two lakes, which may have been driven by dams close to the floodplain.

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来源期刊
Limnology
Limnology 地学-湖沼学
CiteScore
4.30
自引率
6.20%
发文量
15
审稿时长
>12 weeks
期刊介绍: Limnology is a scientific journal published three times a year, in January, April, and August, by Springer in association with the Japanese Society of Limnology. The editors welcome original scientific contributions on physical, chemical, biological, or related research, including environmental issues, on any aspect of basic, theoretical, or applied limnology that present significant findings for the community of scholars. The journal publishes Rapid communications, Research papers, Review articles, Asia/Oceania reports, and Comments. The aims and scope of Limnology are to publish scientific and/or technical papers in limnological sciences, to serve as a platform for information dissemination among scientists and practitioners, to enhance international links, and to contribute to the development of limnology.
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