干旱区生态环境知识资源中心(Arid): Functional threshold responses of benthic macroinvertebrates to environmental stressors in reservoirs

Arid

DOI	10.1016/j.jenvman.2022.116970
	Functional threshold responses of benthic macroinvertebrates to environmental stressors in reservoirs
	Paiva, Franciely Ferreira; Melo, Dalescka Barbosa de; Dolbeth, Marina; Molozzi, Joseline
通讯作者	Paiva, FF
来源期刊	JOURNAL OF ENVIRONMENTAL MANAGEMENT
ISSN	0301-4797
EISSN	1095-8630
出版年	2023
卷号	329
英文摘要	Reservoirs are aquatic ecosystems created by humans to supply water needs. They can impair aquatic diversity due to the lack of connectivity, reduced water volume, and pressures exerted by surrounding human activities. These changes are expected to produce abrupt fluctuations in the reservoirs' environment, thus influencing the structure and functioning of aquatic communities. Therefore, this study aimed to understand the impact of a range of environmental stressors in reservoirs on benthic macroinvertebrates by analyzing their functional threshold response. Biological data were collected in six reservoirs from the semi-arid region of Northeast Brazil, as case study. A total of 37.874 benthic macroinvertebrates belonging to 35 taxa were collected. Nevertheless, almost 90% of this abundance belonged to three species alone, considered generalists, with multivoltine reproduction and from the gatherer-collectors feeding group. Increases in environmental stressors such as salinity, nitrate, ammonia, and dissolved solids led to the selection of macroinvertebrates with specific traits (e. g., protected body, gill respiration, and large body size). These functional traits showed differences in their threshold response depending on the stressors and are indicators of the effects of these stressors on the reservoirs. Some of the potential sensitive traits (with a negative threshold response to the stressor) could also associate with other stressors, demonstrating that tolerance of benthic macroinvertebrates is defined by a set of functional characteristics. Overall, the increase in stressor' gradients selected functionally tolerant organisms with high resistance capacity, but these were represented by dominant species. This resulted in low diversity in the res-ervoirs, which may compromise ecosystem functioning, and raises concerns about adequate management of the systems.
英文关键词	Benthic macrofauna Bioindicators Semiarid Impact gradients Traits
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000906585700001
WOS关键词	COMMUNITY RESPONSES ; LAND-USE ; TRAITS ; BIODIVERSITY ; DISTURBANCE ; CHIRONOMIDAE ; MANAGEMENT ; DIVERSITY ; PATTERNS ; IMPACTS
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397276
推荐引用方式 GB/T 7714	Paiva, Franciely Ferreira,Melo, Dalescka Barbosa de,Dolbeth, Marina,et al. Functional threshold responses of benthic macroinvertebrates to environmental stressors in reservoirs[J],2023,329.
APA	Paiva, Franciely Ferreira,Melo, Dalescka Barbosa de,Dolbeth, Marina,&Molozzi, Joseline.(2023).Functional threshold responses of benthic macroinvertebrates to environmental stressors in reservoirs.JOURNAL OF ENVIRONMENTAL MANAGEMENT,329.
MLA	Paiva, Franciely Ferreira,et al."Functional threshold responses of benthic macroinvertebrates to environmental stressors in reservoirs".JOURNAL OF ENVIRONMENTAL MANAGEMENT 329(2023).