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Open AccessArticle

Effect of Land Use on the Benthic Diatom Community of the Danube River in the Region of Budapest

1
Danube Research Institute, MTA Centre for Ecological Research, Karolina út 29, H-1113 Budapest, Hungary
2
Sustainable Ecosystems Group, MTA Centre for Ecological Research, Klebelsberg Kuno u. 3, H-8237 Tihany, Hungary
3
Faculty of Water Sciences, National University of Public Service, Bajcsy-Zsilinszky utca 12-14, H-6500 Baja, Hungary
4
Doctoral School of Environmental Sciences, Eötvös Loránd University, Pázmány P. s. 1/A, H-1113 Budapest, Hungary
5
Department of Tisza Research, Danube Research Institute, MTA Centre for Ecological Research, Bem tér 18/c, H-4026 Debrecen, Hungary
*
Author to whom correspondence should be addressed.
Equal contribution.
Water 2020, 12(2), 479; https://doi.org/10.3390/w12020479
Received: 13 January 2020 / Revised: 4 February 2020 / Accepted: 6 February 2020 / Published: 11 February 2020
(1) Urbanization significantly influences the ecosystems of rivers in various ways, including the so-called loading effect of wastewater production. Benthic diatoms are used in ecological status assessments of waters. Beside species composition, traits can be used as indicators. We aimed to evaluate how the loading of the large city of Budapest manifests in the physico-chemical variables of the River Danube and what species composition and trait response this loading results in for the benthic diatom communities. (2) Weekly samplings were performed at points upstream and downstream of Budapest on both riverbanks. Samples were compared, based on general physical-chemical variables and the concentration of thirty-four elements, as well as species composition and seven traits of species of diatom communities. Ecological status was assessed using the Specific Pollution Sensitivity Index (IPS). (3) Only a few measured environmental variables showed differences between the sampling points, suggesting that the nutrient loading has significantly decreased due to the installation of several efficiently working wastewater treatment plants since the introduction of the European Union Water Framework Directive. In contrast, the species composition and traits of species showed the effect of land use. Benthic diatoms indicate the environmental changes caused by land use in the longer-term, while chemical measurements reflect instantaneous status.
Keywords: urbanization; River Danube; diatom; traits urbanization; River Danube; diatom; traits
MDPI and ACS Style

Trábert, Z.; Duleba, M.; Bíró, T.; Dobosy, P.; Földi, A.; Hidas, A.; Kiss, K.T.; Óvári, M.; Takács, A.; Várbíró, G.; Záray, G.; Ács, É. Effect of Land Use on the Benthic Diatom Community of the Danube River in the Region of Budapest. Water 2020, 12, 479.

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