Water quality and diatom communities in two catalan rivers (N.E. Spain) |
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| Authors: | Sergi Sabater Francesc Sabater Xavier Tomas |
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| Affiliation: | 1. From the Divsion of Endocrinology and Metabolism, Department of Medicine, University of Virginia School of Medicine, Charlottesville, Virginia;2. Division of Internal Medicine, Grady Memorial Hospital, Atlanta, Georgia;3. Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, University of Chicago, Chicago, Illinois;4. Division of Translational Research and Applied Statistics, Department of Public Health Sciences, University of Virginia, Charlottesville, Virginia;5. Division of General Medicine and Geriatrics, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia;6. Division of General Internal Medicine, Palliative Medicine, and Medical Education, Department of Medicine, University of Louisville, Louisville, Kentucky;7. Division of General Internal Medicine and Hypertension, Department of Medicine, University of Mississippi Medical Center, Jackson, Mississippi.;1. Institute of Biology and Soil Science, Far Eastern Branch, Russian Academy of Sciences, pr. 100-letiya Vladivostoka, 159, Vladivostok, 690022, Russia;2. Far East Geological Institute, Far Eastern Branch, Russian Academy of Sciences, pr. 100-letiya Vladivostoka, 159, Vladivostok, 690022, Russia;3. Far Eastern Federal University, ul. Sukhanova 8, Vladivostok, 690091, Russia;4. Institute of Chemistry, Far Eastern Branch, Russian Academy of Sciences, pr. 100-letiya Vladivostoka 159, 690022, Vladivostok, Russia;1. Laboratório de Estudos Palinológicos, Departamento de Educação–Campus VII, Universidade do Estado da Bahia (UNEB), Senhor do Bonfim, Bahia, 48970-000, Brazil;2. Laboratório de Micromorfologia Vegetal, Departamento de Ciências Biológicas, Universidade Estadual de Feira de Santana (UEFS), Feira de Santana, Bahia, 44036-900, Brazil;1. Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, 29 Zhongguancun East Road, Beijing 100190, China;2. Beijing Key Laboratory of Thermal Science and Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, 29 Zhongguancun East Road, Beijing 100190, China;3. University of Chinese Academy of Sciences, No. 19A Yuquan Road, 100049, Beijing, China |
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| Abstract: | Benthic diatom assemblages have been used to evaluate the water quality of two rivers subjected to marked human influences. These rivers, the Llobregat and the Ter, are located in N.E. Spain, and supply water for industrial, agricultural and urban requirements of roughly three million people. The diatom communities in the headwaters are similar in both rivers (Achnanthes minutissima, Cymbella ventricosa, Gomphonema anguslatum). Species of Navicula, Nitzschia and Gomphonema develop in the middle reaches of both rivers when not disrupted by extraneous factors. In the river Ter significant pollution modifies this community and Nitzschia palea, Nitzschia gandersheimiensis and Gomphonema parvulum appear as the most tolerant species. In the Llobregat, the pollution from the salt mine operations also modifies the diatom assemblage and Nitzschia frustulum, Surirella ovata, Navicula atomus are the most abundant species. Reservoirs in the river Ter improve the quality of water and a community of Fragilaria sp. pl. becomes dominant downstream. |
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| Keywords: | diatoms community analysis river ordination pollution nutrients reservoirs |
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