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Millan A.,University of Murcia | Picazo F.,University of Murcia | Fery H.,Rauschstr. 73 | Moreno J.L.,Centro Regional Of Estudios Del Agua Crea | And 2 more authors.
Zootaxa | Year: 2013

Stictonectes abellani sp. n. is described from the Iberian Peninsula. On average, the new species is larger and the colouration of the upper surface darker than in most other species of the genus. Seemingly the species has been confounded with others in the past, particularly S. optatus (Seidlitz, 1887). Males can be separated from externally similar species by studying the shape of the parameres. Additionally, the anterior margin of the clypeus is provided with a distinct rim in both sexes, which is absent or only weakly present in other species. The habitus and the male genitalia of the new species are illustrated, and compared with those of S. optatus. External morphological differences from other members of the genus are discussed. According to studies of the molecular phylogeny, based on fragments of four mitochondrial genes, S. abellani sp. n. is clearly separated from previously described species of Stictonectes Brinck, 1943, apparently being relatively basal within the genus. The new species is rather widely distributed in the south-western part of the Iberian Peninsula, inhabiting pools in small temporary siliceous streams. We provide distributional maps for all eight Iberian Stictonectes and estimate the potential distributional areas of the new species and the other two endemic Iberian species S. occidentalis Fresneda & Fery, 1990 and S. rebeccae Bilton, 2011, based on environmental niche modelling. © 2013 Magnolia Press.

Castro E.,Centro Regional Of Estudios Del Agua Crea | Manas P.,Centro Regional Of Estudios Del Agua Crea | De Las Heras J.,University of Castilla - La Mancha
Journal of Plant Nutrition | Year: 2013

Wastewater reuse can pose risks due to the presence of heavy metals or pathogen microorganisms. The objective of this paper is to assess the possible environmental and human health risks of treated wastewater when applied to horticultural crops. Results show a high influence of treated wastewater in some soil parameters, such as sodium. Results on growth parameters (dry and fresh weight, average height and diameter) show higher values for plants irrigated with treated wastewater than the control. The contribution of nutrients and organic matter from treated wastewater from the Alcázar de San Juan wastewater treatment plant with no additional mineral fertilizer was not sufficient for the normal development of the lettuce plants throughout the three crop seasons. The presence of pathogen microorganisms in two plots was detected in plants and soil. © 2013 Copyright Taylor and Francis Group, LLC.

Laguna C.,Institute Investigacion en Recursos Cinegeticos IREC | Laguna C.,Centro Regional Of Estudios Del Agua Crea | Lopez-Perea J.J.,Institute Investigacion en Recursos Cinegeticos IREC | Vinuela J.,Institute Investigacion en Recursos Cinegeticos IREC | And 5 more authors.
Science of the Total Environment | Year: 2016

Floodplains are among the most threatened ecosystems world-wide because of multiple stressors, i.e., invasive species, pollution and aquifer overexploitation; the Tablas de Daimiel National Park (Spain) is a clear example of these kinds of impact. This work aims to test whether invasive fish and/or the water and sediment quality are significant drivers of the decline of stonewort (Chara spp.) meadows in the Tablas de Daimiel, investigating how this could explain changes observed in the waterbird community. Bird surveys performed monthly between June 2010 and April 2014 have shown that herbivorous species like the red-crested pochard (Netta rufina) reached historical records between September 2010 and June 2011, but have decreased since then. Piscivorous waterbirds like the great cormorant (Phalacrocorax carbo) and herons increased in population after 2011, however. These changes may be due to the decline of Chara spp. meadows, connected to overexploitation by herbivores, or to changes in water and sediment quality. To test this hypothesis, we studied the growth of Chara spp. biomass in ten sites of the Tablas de Daimiel, where experimental exclosures were set up to exclude herbivory by birds, and bioturbation and herbivory by fish. Our results have shown that the absence of Chara spp. in the Tablas de Daimiel is mostly explained by presence of invasive fish (i.e. common carp). Moreover, the physicochemical characteristics of the water (lower values of conductivity and higher values of inorganic carbon and organic nitrogen), as well as of the sediment (lower values of inorganic and organic phosphorus), favour the increase of Chara spp., in the absence of the fish effect. These results led the National Park managers to begin the control of invasive fish as an urgent measure to assure the ecological conservation of this Mediterranean wetland. © 2016 Elsevier B.V.

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