Fish Ecology and Responses to Environmental Variation in Streams

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Biodiversity and Functionality of Aquatic Ecosystems".

Deadline for manuscript submissions: closed (31 October 2023) | Viewed by 1357

Special Issue Editors


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Guest Editor
Ecology and Conservation Laboratory (LABECO), Biological Sciences Institute, Federal University of Pará, Belém, Brazil
Interests: ecology; freshwater; fish; landscape; community ecology; feed ecology; reproduction ecology

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Guest Editor
Department of Biological Sciences, University of Toronto-Scarborough, Toronto, ON, Canada
Interests: fish ecology; community ecology; freshwaters

Special Issue Information

Dear Colleagues,

Environmental conditions are important factors in the maintenance and conservation of biodiversity. In recent years, we have seen advances in anthropic changes in natural ecosystems, which have resulted in a decrease in environmental variation and a loss of biodiversity. These impacts are of even greater concern in more sensitive systems such as small streams because of their connection with and dependence on their drainage basin, where changes made to the terrestrial system leach into the aquatic system. Therefore, it is of global concern that in many regions, it is only possible to find streams that are still of good environmental quality in areas of forest remnants that are situated within altered landscapes with different land use practices, such as agriculture, pasture, logging, and urbanization.

Streams are major contributors to the biodiversity of river ecosystems, but are among the ecosystems most threatened by human activities arising from land use practices, chemical and physical pollution, and the introduction of exotic or invasive species. Because of their dependence on riparian forest and their proximity to urban centers, streams are substantially affected by deforestation, which changes the banks, causing instability in the riparian zone and changing the energy input system. What was once sustained by an allochthonous system, with the input of branches, leaves, and fruits of the marginal vegetation, is now supported by an autochthonous system, with the input of algae and macrophytes. This change in the energy input can cause changes in the proportions of the functional groups, or even local extinction. Concomitantly to this, terrestrial inputs such as sediments and pesticides are leached into the stream channel, which changes the substrate and decreases microhabitat variability, causing a loss of species. In addition, these changes impact the entire drainage basin, directly affecting small-order streams, which may eventually manifest in large rivers. Although recent studies have shown the importance of maintaining environmental variation to ensure the preservation of stream biodiversity, these environments are often neglected in conservation plans.

This Special Issue invites authors to submit original research papers or review articles covering the latest discoveries and developments in this field. We seek contributions reporting fishes’ ecological responses to different local- and landscape-scale environmental variations in small-order streams. Contributions may be based on populations and stream fish communities, with approaches based on taxonomic, functional, and phylogenetic diversity.

Prof. Dr. Luciano Fogaça de Assis Montag
Dr. Bruno Eleres Soares
Guest Editors

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Water is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • community ecology
  • population ecology
  • food webs
  • landscape
  • freshwater
  • stream ecology

Published Papers (1 paper)

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Research

14 pages, 3861 KiB  
Article
Ecology Health Evaluation System Based on Fish Movement Behavior Response
by Yuequn Huang, Rongcong Pang, Xiangtong Li, Wenjing Li, Zhanpeng Yang, Dunqiu Wang and Kun Dong
Water 2023, 15(23), 4066; https://doi.org/10.3390/w15234066 - 23 Nov 2023
Viewed by 1030
Abstract
Using fish as indicator organisms to monitor water quality can accurately reflect the pollution status of aquatic environments in real time. Currently, there are limited quantitative and empirical studies on fish movement behavior. An experimental study on the fish movement behavior response during [...] Read more.
Using fish as indicator organisms to monitor water quality can accurately reflect the pollution status of aquatic environments in real time. Currently, there are limited quantitative and empirical studies on fish movement behavior. An experimental study on the fish movement behavior response during water quality change was conducted using an aquatic environment model. Advanced acoustic tag monitoring technology was used to qualitatively and quantitatively assess fish movement. Using the temporal and spatial distributions of fish motion behavioral trajectories during water quality change, the fish behavior response indicators were the distance between the fish and the source of pollution, the distance between the fish and the water surface, and fish swimming speed. The fish were sensitive to water quality factors, including dissolved oxygen (DO) content, microcystin aeruginosa toxin (MC-LR), and non-ionic ammonia (NH3). The correlations between indicator pairs were analyzed. A new water ecological health evaluation system based on these indicators was constructed, and aquatic ecological health in the field was evaluated using the new system. The evaluation showed a sub-healthy state in spring and a slightly morbid to morbid state in summer, which was consistent with the results based on water quality indices. The accuracy of the proposed assessment system was verified. This showed that the assessment method and grade division of the assessment system were reasonable and feasible and could reflect the health status of the aquatic ecological environment in real time. This study provides a basis for the assessment of the health and restoration effects of the aquatic ecological environment. Full article
(This article belongs to the Special Issue Fish Ecology and Responses to Environmental Variation in Streams)
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