Article: Damming and seasonality as modulators of fish community structure in a small tributary
Ecology of freshwater fish. 2019 Oct., v. 28, no. 4
2019
Abstract: River damming alters the physical–chemical variables of water and often causes compartmentalisation of aquatic habitats. Seasonality can add complexity to the longitudinal compartmentalisation. The spatial and temporal effects of these two phenomena on ... ...
| Abstract | River damming alters the physical–chemical variables of water and often causes compartmentalisation of aquatic habitats. Seasonality can add complexity to the longitudinal compartmentalisation. The spatial and temporal effects of these two phenomena on the structure of ichthyofauna from a tributary under the influence of damming were evaluated, based on the following hypotheses: (1) transition habitats have the greatest species richness; (2) community similarity decreases with increasing distance between sites; (3) conservation of free‐flowing areas upstream reservoir contributes to the maintenance of migratory species. To evaluate the effects of these two phenomena, twelve monthly fish samples (September/12 to August/13) were performed with gillnets in three sample areas distributed longitudinally in the tributary. Limnological variables were measured in the same sample areas to confirm compartmentalisation. We observed three distinct limnological compartments (lotic, transition and lentic), with increase differentiation during the rainy season. This compartmentalisation influenced fish fauna where localised communities exhibited different compositions among the three sampled habitats. During the rainy season, these differences become pronounced, with transition habitat showing greater species richness than the others. More pronounced differences in species composition and structure in extremes sampling sites were also observed. Migratory fish presented higher proportion of fish composition in lotic habitat. In conclusion, damming and seasonality acted concomitantly as modulators of fish fauna in a tributary influenced by damming. However, compartmentalisation of habitats was the primary driver of ichthyofauna community structure with the rainy season increasing differences in community composition. |
|---|---|
| Keywords | aquatic habitat ; community structure ; dams (hydrology) ; fauna ; fish ; fish communities ; gillnets ; lentic systems ; lotic systems ; migratory behavior ; migratory species ; rivers ; species richness ; wet season |
| Language | English |
| Dates of publication | 2019-10 |
| Size | p. 563-572. |
| Publishing place | John Wiley & Sons, Ltd |
| Document type | Article |
| Note | JOURNAL ARTICLE |
| ZDB-ID | 913011-1 |
| ISSN | 0906-6691 |
| ISSN | 0906-6691 |
| DOI | 10.1111/eff.12475 |
| Database | NAL-Catalogue (AGRICOLA) |
More links
Kategorien
In stock of ZB MED Bonn / Germany
| Z 5359: Show issues |
Order via subito
This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.
Inter-library loan at ZB MED
Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.