Publicação
Impacts on aquatic ecosystem integrity of Portelo stream (Douro basin, NE Portugal) after a large spill of mining wastes
| dc.contributor.author | Teixeira, Amílcar | |
| dc.contributor.author | Fernandes, Conceição | |
| dc.contributor.author | Geraldes, Ana Maria | |
| dc.date.accessioned | 2018-03-01T13:56:52Z | |
| dc.date.available | 2018-03-01T13:56:52Z | |
| dc.date.issued | 2014 | |
| dc.description.abstract | During December 2009, after a period of intense precipitation, several millions of cubic meters of wastes from an abandoned mine were spilled into Portelo stream, a tributary of Rio Sabor (Douro basin) in the northeastern Montesinho Natural Park (NE Portugal). The large amount of wastes covered the riverbed with a layer of fine sediments, reaching more than half a meter in areas close to the mine. Both riparian and agricultural areas were also affected by these sediments from the mine. Wastes were spilled downstream until the main watercourse, River Sabor, by several strong rain events. This study, developed from 2010 to 2013, evaluated the impact of this event on ecosystem integrity, namely in the water chemistry, channel and riparian habitats and on macroinvertebrate communities. Samples were collected from eight different stations distributed along the hydric system. Toxicity experiments were developed in laboratory for one fish species, the barbel (Luciobarbus bocagei), an endemic cyprinid present in River Sabor. The results showed a substantial increase of conductivity (>300 µS.cm-1), total suspended solids (> 100 mg.L) and a decrease of pH (<5) in the water analyses. From the 52 elements analyzed, including different heavy metals, it was detected a higher concentration of copper, aluminium and cobalt in the water. Aquatic habitats were severely disturbed and important changes occurred in riparian zone. Temporal and spatial differences were found and several metrics (e.g. taxonomic richness, diversity, evenness) confirming the disturbance detected on macroinvertebrate assemblages. As expected, the stations located near the mine showed the highest levels of contamination and disturbance. Biochemical indicators (Na+ and K+ plasmatic concentrations) used in laboratory tests were sensitive, under acute copper exposure of barbel populations (different copper concentrations, 0.06-0.48 ppm were used), and can help to justify the disappearance and or reduction of fish species in the affected area. | pt_PT |
| dc.description.version | info:eu-repo/semantics/publishedVersion | pt_PT |
| dc.identifier.citation | Teixeira, Amílcar; Fernandes, Conceição; Geraldes, Ana Maria (2014). Impacts on aquatic ecosystem integrity of Portelo stream (Douro basin, NE Portugal) after a large spill of mining wastes. In XVII Congresso of Iberian Association of Limnolog. Santander | pt_PT |
| dc.identifier.uri | http://hdl.handle.net/10198/16079 | |
| dc.language.iso | eng | pt_PT |
| dc.peerreviewed | yes | pt_PT |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | pt_PT |
| dc.title | Impacts on aquatic ecosystem integrity of Portelo stream (Douro basin, NE Portugal) after a large spill of mining wastes | pt_PT |
| dc.type | conference object | |
| dspace.entity.type | Publication | |
| oaire.citation.conferencePlace | Santander | pt_PT |
| oaire.citation.title | XVII Congresso of Iberian Association of Limnology University of Cantabria, Santander | pt_PT |
| person.familyName | Teixeira | |
| person.familyName | Fernandes | |
| person.familyName | Geraldes | |
| person.givenName | Amilcar | |
| person.givenName | Conceição | |
| person.givenName | Ana Maria | |
| person.identifier | 2153193 | |
| person.identifier | 15483 | |
| person.identifier.ciencia-id | 9510-3CF3-0393 | |
| person.identifier.ciencia-id | 6514-3D41-4534 | |
| person.identifier.ciencia-id | 7D13-2CED-D6C5 | |
| person.identifier.orcid | 0000-0001-5336-1174 | |
| person.identifier.orcid | 0000-0003-2873-501X | |
| person.identifier.orcid | 0000-0003-4966-2227 | |
| person.identifier.rid | J-8566-2014 | |
| person.identifier.scopus-author-id | 7202385393 | |
| person.identifier.scopus-author-id | 23018336600 | |
| person.identifier.scopus-author-id | 57204313331 | |
| rcaap.rights | openAccess | pt_PT |
| rcaap.type | conferenceObject | pt_PT |
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