caa a22 4500 475784154 CHVBK 20180406123653.0 cr unu---uuuuu 170329e20000301xx s 000 0 eng 10.1023/A:1008197411815 doi (NATIONALLICENCE)springer-10.1023/A:1008197411815 Sabater Sergi Departament d'Ecologia, Facultat de Biologia, Universitat de Barcelona, Avgda. Diagonal 645, 08028, Barcelona, Spain aut Diatom communities as indicators of environmental stress in the Guadiamar River, S-W. Spain, following a major mine tailings spill [Elektronische Daten] [Sergi Sabater] An accident in a mine tailings dam caused the outflowof mud and water rich in heavy metals in April 1998that flooded the Guadiamar River and its floodplain,in the vicinity of Doñana National Park. Theimpact on the periphytic communities was evaluated byanalyzing the evolution of the diatom communitiesafter seven (November 1998) and fourteen months (June1999) of the accident. The comparison between thereference and affected sites showed a shift from adiatom community dominated by Fragilariaconstruens, Achnanthes minutisssima and Amphora pediculus to another dominated by Nitzschia palea and Gomphonema parvulum. Thevalues for Shannon-Wiener diversity strongly decreasedin the affected area; changes between survey periodsfailed to show a marked recovery. However, evennesswas slightly higher for the June 1999 period,suggesting a slight improvement in the diatomcommunity. Diatom indices (IPS-IDG, Descy, CEE,Lange-Bertalot) were applied to the data. Values forthese also showed a marked decrease in water qualityat sites closest to the mine tailings spill, as wellas a progressive recovery downstream. Correlationanalyses between the diatom descriptors and theenvironmental variables confirmed that heavy metals inthe water and sediment had a marked and lasting effecton the diatom communities of the Guadiamar. Otherpollution events (e.g. 'salpechin' sewage) probablyhindered recovery of the periphytic communities. Kluwer Academic Publishers, 2000 diatom communities nationallicence diatom indices nationallicence diversity nationallicence Doñana nationallicence evenness nationallicence Guadiamar nationallicence heavy metals nationallicence mine tailings nationallicence Journal of Applied Phycology Kluwer Academic Publishers 12/2(2000-03-01), 113-124 0921-8971 12:2<113 2000 12 10811 https://doi.org/10.1023/A:1008197411815 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1008197411815 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Sabater Sergi Departament d'Ecologia, Facultat de Biologia, Universitat de Barcelona, Avgda. Diagonal 645, 08028, Barcelona, Spain aut NATIONALLICENCE 773 0- Journal of Applied Phycology Kluwer Academic Publishers 12/2(2000-03-01), 113-124 0921-8971 12:2<113 2000 12 10811 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer