Unexpected consequences of bombing. Community level response of epiphytic diatoms to environmental stress in a saline bomb crater pond area.

Autor: Földi A; MTA Centre for Ecological Research, Sustainable Ecosystems Group, Tihany, Hungary.; Doctoral School of Environmental Sciences, Eötvös Loránd University, Budapest, Hungary., Ács É; MTA Centre for Ecological Research, Danube Research Institute, Budapest, Hungary., Grigorszky I; MTA Centre for Ecological Research, Danube Research Institute, Budapest, Hungary.; University of Debrecen, Department of Hydrobiology, Debrecen, Hungary., Ector L; Environmental Research and Innovation Department (ERIN), Luxembourg Institute of Science and Technology (LIST), Belvaux, Luxembourg., Wetzel CE; Environmental Research and Innovation Department (ERIN), Luxembourg Institute of Science and Technology (LIST), Belvaux, Luxembourg., Várbíró G; MTA Centre for Ecological Research, Sustainable Ecosystems Group, Tihany, Hungary.; MTA Centre for Ecological Research, Danube Research Institute, Department of Tisza River Research, Debrecen, Hungary., Kiss KT; MTA Centre for Ecological Research, Danube Research Institute, Budapest, Hungary., Dobosy P; MTA Centre for Ecological Research, Danube Research Institute, Budapest, Hungary., Trábert Z; MTA Centre for Ecological Research, Danube Research Institute, Budapest, Hungary., Borsodi AK; MTA Centre for Ecological Research, Danube Research Institute, Budapest, Hungary.; Eötvös Loránd University, Department of Microbiology, Budapest, Hungary., Duleba M; MTA Centre for Ecological Research, Danube Research Institute, Budapest, Hungary.
Jazyk: angličtina
Zdroj: PloS one [PLoS One] 2018 Oct 25; Vol. 13 (10), pp. e0205343. Date of Electronic Publication: 2018 Oct 25 (Print Publication: 2018).
DOI: 10.1371/journal.pone.0205343
Abstrakt: The spatial response of epiphytic diatom communities to environmental stress was studied in a moderately saline wetland area located in the plain of Danube-Tisza Interfluve, Hungary. The area is characterised by World War II bomb crater ponds and can be regarded as an excellent ecological model system where the dispersion of species is slightly limited by distance. To study the effect of environmental variables on the communities, canonical correspondence analysis was applied. Salinity, pH, total suspended solids, total phosphorous and depth proved to be significant environmental drivers in this analysis. The ecological status of the ponds was assessed with Ziemann's halobity index, as the trophity-depending metric cannot be applied to these habitats (due to the naturally high phosphorus content). Ponds in "good" ecological status significantly differed from those appertaining to water quality category of "not-good" ecological status considering characteristic of natural astatic soda pans (e.g. salinity, pH, ammonium, total phosphorous concentration, nitrogen:phosphorous ratio and turbidity). The differences between epiphytic diatom communities inhabiting the ponds were detected using non-parametric multidimensional scaling. The samples formed three groups according to the types of ponds ("transparent", "transitional" and "turbid") based on the width of the macrophyte belt around them. Indicator species related to the ecological status of the ponds and diatom communities contributing to the separation of groups of ponds were identified. One of the indicator species differed from species already described. Light and scanning electron microscopy features and phylogenetic analyses based on three genes (18S and 28S rRNA genes, rbcL) proved that it was a new species of Nitzschia genus, closely related to Nitzschia frustulum and Nitzschia inconspicua. Therefore, description of a new species, Nitzschia reskoi Ács, Duleba, C.E.Wetzel & Ector is proposed. We concluded that the increasing abundance of Nitzschia reskoi was a signal of the degradation of the intermittent saline wetlands.
Competing Interests: The authors have declared that no competing interests exist.
Databáze: MEDLINE
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