Survival under anthropogenic impact: the response of dragonflies (Odonata), beetles (Coleoptera) and caddisflies (Trichoptera) to environmental disturbances in a two-way industrial canal system (central Poland)
- Published
- Accepted
- Subject Areas
- Biodiversity, Entomology, Freshwater Biology, Environmental Impacts
- Keywords
- cooling water, Coleoptera, Trichoptera, dredging, canals, Odonata, environmental factors, insect assemblages
- Copyright
- © 2018 Buczyńska et al.
- Licence
- This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ Preprints) and either DOI or URL of the article must be cited.
- Cite this article
- 2018. Survival under anthropogenic impact: the response of dragonflies (Odonata), beetles (Coleoptera) and caddisflies (Trichoptera) to environmental disturbances in a two-way industrial canal system (central Poland) PeerJ Preprints 6:e27404v1 https://doi.org/10.7287/peerj.preprints.27404v1
Abstract
Ecological metrics and assemblages of three orders of aquatic insects (Odonata, Coleoptera and Trichoptera – OCT) in an industrial canal system affected by dredging were studied. Five sites (a river as a control site and canals) along the Vistula River in Central Poland were sampled during six sampling periods (2011 and 2013). CCA was used to assess the influence of environmental variables on the distribution of 54 insect species in the following system of habitats – a river feeding the canals, river-fed inlet canals and outlet canals with cooling waters. Additionally, BACI was used to test for the impact of canal dredging in 2011 on the insect response metrics. NMDS analysis differentiated insect assemblages of the three habitats and SIMPER indicated the species most responsible for the faunistic dissimilarities. Temperature was found to be a key factor governing the presence of insects in the outlet canals with cooling water. CCAs revealed that electrolytic conductivity and salinity had the greatest influence on the OCT fauna in the river and the inlet canals, whilst it was the dissolved oxygen and the level of development of aquatic plants that proved most important in the outlet canals. Modified ANOVAs showed that dredging significantly affected the mean species richness and the dominance in the canals. The changes in OCT species composition were highly informative. The comparison between tolerance patterns of the OCT orders against the five parameters (temperature, electrolytic conductivity, total dissolved solids, pH and current) revealed that caddisflies are the most sensitive group, followed by Coleoptera while Odonata proved the most resistant. Dragonflies have the greatest potential to serve as bioindicators of industrially heated waters. The OCT fauna responded specifically to different environmental factors and stressors, it is strongly recommended to track the responses on different levels, not only metrics, but above all, species.
Author Comment
This is a submission to PeerJ for review.
Supplemental Information
Database: species and environmental variables
A. Sample. B. Subsample. C. Species. D. Species code. E. Insect order. F. Site. G. Year. H. Month. I. Number of species. J. Temperature. K. pH. L. Dissolved oxygen. M. Electrolytic conductivity. N. Total dissolved solids. O. Salinity. P. Current. Q. Aquatic plants. R. Riparian plants.