Species in Diatom Communities Shift as a Consequence of Water Quality Changes
A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Water Quality and Contamination".
Deadline for manuscript submissions: closed (31 July 2022) | Viewed by 302
Special Issue Editor
Interests: water quality; macroinvetebrates; ecosystem services; eutrophication
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Dear Colleagues,
Diatoms represent the main group within the phytobenthos (Rovira et al., 2012), with a large taxonomic diversity especially in lotic ecosystems (Morais et al., 2009). Today, there is still a low number of studies that relate the changes of diatom indices in response to water quality variations, by taking into account the time required for diatom communities to respond to water quality.
Different test experiments where substrate changes from one aquatic environment to another, with different water quality, have demonstrated the phenomenon of ecological succession of diatom species to water quality changes (Ivorra., 2000; Tolcach and Gómez., 2002).
Another experiment, carried out by Remit et al. (2009), made it possible to study changes in diatom species composition by transferring synthetic substrates with diatom communities, from a polluted to an unpolluted river. The result was the gradual replacement of species that were dominant in the polluted river (Gomphonema parvulum, Eolimna minoma, Nitzschia palea, Mayamaea atomus var. permitis), by pollution-sensitive species previously identified in the reference site – unpolluted river (Achnanthidium biasolettianum, Achnanthidium minutissimum,
A pediculus and Gomphonema pumilum). These results were similar to the results obtained in the abovementioned experiments (although for different forms of pollution), the distinguishing feature of each of these experiments being the time it took for each transferred diatom co9mmunity to become similar to the reference site.
It is clear that these naturally occurring processes of changes in the chemical and physical composition of water would have slower reaction times. In the meantime, the results of these experimental studies enable water managers to begin to address this issue of ecological succession and functioning structures of these organisms, as they are closer to the ecological status designation given in the Water Framework Directive, and giving greater importance to the changes in these benthic diatom communities with changes in water quality.
Dr. Natividade Vieira
Guest Editor
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Keywords
- diversity
- water quality
- contamination
- biotic index
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