title: Response of microcrustacean communities from the surface-groundwater interface to water contamination in urban river system of the Jarama basin (central Spain).
abstract: In order to evaluate the water quality at the surface/groundwater interface (hyporheic zone), the pattern of microcrustacean assemblages in response to environmental stress caused by urban industrial contamination was studied in the Jarama River basin (central Spain) during high water discharges (March and April 2011). The clustering of biological variables and the concentration of urban contaminants in hyporheic waters showed that pristine hyporheic waters have moderate species diversity (two to seven species) and dominance of k strategist stygobites, whereas excessively contaminated sites are devoid by crustaceans. An intermediate level of disturbance in hyporheic waters is associated with a peak of species taxonomic diversity (four to nine species) and proliferation of r strategist more tolerant species. Typical species found in hyporheic zone, e.g., Paracyclops imminutus (Copepoda, Cyclopoida), Cryptocandona vavrai (Ostracoda) and Herpetocypris chevreuxi (Ostracoda), were good indicators of high concentrations of Cr, Mn, Ni, Cd, Pb and VOCs; whereas the stygobites do not show any significant correlation. The effectiveness of hyporheic crustaceans as efficient bioindicators for assessing the current ecological status of river ecosystems is emphasised.
authors.affiliation: IMDEA-Water (Madrid Institute for Advanced Studies), Calle Punto Net 1, Edificio ZYE 2, Parque Cientifico Tecnológico de la Universidad de Alcalá, 28805, Alcalá de Henares, Madrid, Spain. sanda.iepure@imdea.org
authors.forename: Sanda
authors.initials: S
authors.lastname: Iepure
authors.forename: Virtudes
authors.initials: V
authors.lastname: Martinez-Hernandez
authors.forename: Sonia
authors.initials: S
authors.lastname: Herrera
authors.forename: Ruben
authors.initials: R
authors.lastname: Rasines-Ladero
authors.forename: Irene
authors.initials: I
authors.lastname: de Bustamante
mesh_terms: D000818:Animals; D044822:Biodiversity; D002947:Cities; D003445:Crustacea / Q000145:classification*; D004784:Environmental Monitoring; D060587:Groundwater; D019216:Metals, Heavy / Q000032:analysis; D009566:Nitrates / Q000032:analysis; D011156:Population Density; D000644:Quaternary Ammonium Compounds / Q000032:analysis; D045483:Rivers; D013030:Spain; D055549:Volatile Organic Compounds / Q000032:analysis; D014865:Waste Disposal, Fluid; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D019216:Metals, Heavy; D009566:Nitrates; D000644:Quaternary Ammonium Compounds; D055549:Volatile Organic Compounds; D014874:Water Pollutants, Chemical