NDLI: Effects of Physical Habitat Degradation on the Stream Fish Assemblage Structure in a Pasture Region

Content Provider	Springer Nature Link
Author	Casatti, Lilian Langeani, Francisco Ferreira, Cristiane P.
Copyright Year	2006
Abstract	We compared the fish assemblage structure from streams with different intensities of physical habitat degradation and chemical water pollution by domestic sewage in southeastern Brazil. Eight streams (R1–R8) showing less disturbed or more disturbed conditions of chemical water quality and of physical habitat quality were selected. Cumulative abundance and biomass, combined in ABC plots, revealed (i) biomass curves above the abundance curves, represented by the streams R1–R2 (water and habitat less disturbed) and R5–R6 (water more disturbed and habitat less disturbed), and (ii) biomass curves below the abundance curves, represented by the streams R3–R4 (water less disturbed and habitat more disturbed) and R7–R8 (water and habitat more disturbed). The quantitative structure of the ichthyofauna showed significant correspondence with physical habitat condition but not with chemical water quality. The most significant species to cause the dissimilarity between less disturbed and more disturbed physical habitats was the exotic Poecilia reticulata. Such results indicate that in the focused region—with little influence of industrial pollution, noncritical domestic sewage discharge, and soil predominantly used for pasture—streams with high physical habitat integrity possess a differently structured ichthyofauna than streams with relatively low physical habitat integrity, reinforcing the importance of the physical habitat quality and riparian conservation along these water courses, warranting the conservation of these systems. Indeed, our results also reinforce the importance of including biotic descriptors, particularly of the ichthyo-fauna, in water-monitoring programs designed to reveal signs of human interference.
Starting Page	974
Ending Page	982
Page Count	9
File Format	PDF
ISSN	0364152X
Journal	Environmental Management
Volume Number	38
Issue Number	6
e-ISSN	14321009
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-09-21
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	ABC plots Monitoring Diversity Stream fishes Upper Rio Paraná Ecology Forestry Management Atmospheric Protection/Air Quality Control/Air Pollution Environmental Management Nature Conservation Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution
Content Type	Text
Resource Type	Article
Subject	Ecology Pollution Global and Planetary Change

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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