Hydropsyche

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Narcís Prat - One of the best experts on this subject based on the ideXlab platform.

  • Higher β‐ and γ‐diversity at species and genetic levels in headwaters than in mid‐order streams in Hydropsyche (Trichoptera)
    Freshwater Biology, 2013
    Co-Authors: Cesc Murria, Núria Bonada, Narcís Prat, Miquel A. Arnedo, Alfried P. Vogler
    Abstract:

    Summary The influence of local habitat characteristics and landscape barriers on the distribution of species and genetic diversity remains poorly known. We tested for differences in turnover and total diversity in aquatic insect assemblages among headwater and mid-order reaches, two habitats presumably differing in their connectivity between catchments. The genus Hydropsyche (Trichoptera) includes 17 species in the eastern Iberian Peninsula and northern Morocco. Cytochrome c oxidase subunit I (cox1) gene was sequenced for Hydropsyche assemblages at 38 headwater sites and 12 mid-order sites. Local species and intraspecific genetic diversity and differentiation among populations were measured. A total of 231 cox1 sequences resulted in 83 unique haplotypes that clustered into 19 genetic species entities. We find that α-diversity did not differ between headwater and mid-order habitats at species and genetic levels, but total species numbers and intraspecific genetic diversity (γ-diversity) were higher for headwater than for mid-order or lowland clades, due to greater turnover among sites (β-diversity). The study revealed lineage-specific evolutionary responses to different river zones, presumably because of differences in the strength of landscape barriers. The multispecies community genetic approach provides a comprehensive picture of diversity patterns in Hydropsyche, as it links habitat heterogeneity and dispersal limitations to genetic structure and lineage diversification.

  • higher β and γ diversity at species and genetic levels in headwaters than in mid order streams in Hydropsyche trichoptera
    Freshwater Biology, 2013
    Co-Authors: Cesc Murria, Núria Bonada, Narcís Prat, Miquel A. Arnedo, Alfried P. Vogler
    Abstract:

    Summary The influence of local habitat characteristics and landscape barriers on the distribution of species and genetic diversity remains poorly known. We tested for differences in turnover and total diversity in aquatic insect assemblages among headwater and mid-order reaches, two habitats presumably differing in their connectivity between catchments. The genus Hydropsyche (Trichoptera) includes 17 species in the eastern Iberian Peninsula and northern Morocco. Cytochrome c oxidase subunit I (cox1) gene was sequenced for Hydropsyche assemblages at 38 headwater sites and 12 mid-order sites. Local species and intraspecific genetic diversity and differentiation among populations were measured. A total of 231 cox1 sequences resulted in 83 unique haplotypes that clustered into 19 genetic species entities. We find that α-diversity did not differ between headwater and mid-order habitats at species and genetic levels, but total species numbers and intraspecific genetic diversity (γ-diversity) were higher for headwater than for mid-order or lowland clades, due to greater turnover among sites (β-diversity). The study revealed lineage-specific evolutionary responses to different river zones, presumably because of differences in the strength of landscape barriers. The multispecies community genetic approach provides a comprehensive picture of diversity patterns in Hydropsyche, as it links habitat heterogeneity and dispersal limitations to genetic structure and lineage diversification.

  • genetic and morphological approaches to the problematic presence of three Hydropsyche species of the pellucidula group trichoptera hydropsychidae in the westernmost mediterranean basin
    Aquatic Insects, 2010
    Co-Authors: Cesc Murria, Carmen Zamoramunoz, Carles Ribera, Núria Bonada, Narcís Prat
    Abstract:

    Hydropsyche pellucidula and Hydropsyche incognita (Trichoptera, Hydropsychidae) are common and distinguishable species in central Europe. After a review of adult material, the existence of H. pellucidula in the westernmost Mediterranean Basin was considered doubtful and determined that only H. incognita and another close species, Hydropsyche iberomaroccana, were present. Larvae of these three species are indistinguishable when applying traditional morphological keys. Using molecular analyses (cox1 gene sequences), we investigated larvae–adult associations in order to find morphological characteristics to distinguish and identify larvae. Genetic analyses detected the presence of these three species in the westernmost Mediterranean. H. pellucidula was found to be widespread along the Iberian Peninsula while H. incognita was only found in basins draining from high mountain ranges. H. iberomaroccana was distributed in the south of the Iberian Peninsula and North Africa. Using genetically identified material, ...

  • monitoring metal and metalloid bioaccumulation in Hydropsyche trichoptera hydropsychidae to evaluate metal pollution in a mining river whole body versus tissue content
    Science of The Total Environment, 2006
    Co-Authors: Carolina Sola, Narcís Prat
    Abstract:

    Abstract Whole body metal concentration is easier to analyse than concentration in tissues, but is often not an accurate measure of the potential toxicity of the metal. We tested if whole body metal and metalloid concentrations in the caddisfly Hydropsyche (Trichoptera, Hydropsychidae), common in a mine-polluted river (Guadiamar River, SW Spain), were a useful measure to extrapolate environmental degradation. Our results confirmed that metal and metalloid accumulation by Hydropsyche strongly correlated with metal and metalloid concentration both in the water and the sediment, and also correlated with macroinvertebrate community parameters such as total richness and abundance, as well as the richness of some taxonomic groups (EPT and OCH). Seven elements were analysed, Zn, Cu, Pb, As, Cd, Tl and Sb; only As did not show significant correlations. In addition, after leaving live organisms in clean water for 24 or 48 h, we found that 24 h were sufficient to clean the gut content and that between 33% and 75% of the whole body metal content were concentrated in this organ. Although concentration in tissues also discriminated between control and affected stations, we found better results with whole body concentrations when evaluating environmental quality.

Saini, Malkiat S. - One of the best experts on this subject based on the ideXlab platform.

Martijs J Jonker - One of the best experts on this subject based on the ideXlab platform.

  • caddisflies trichoptera hydropsychidae used for evaluating water quality of large european rivers
    Archives of Environmental Contamination and Toxicology, 1999
    Co-Authors: S C Stuijfzand, E Van Ammelrooy, Stefan Engels, Martijs J Jonker
    Abstract:

    In many European rivers, biodiversity has declined dramatically, and especially riverine insects have disappeared during the past decades. It remains unclear whether poor water quality or deteriorated habitats are limiting the distribution of sensitive aquatic insects in these rivers. The aim of this study, therefore, was to find out if water quality alone is limiting the distribution of these insects in rivers that have suffered from anthropogenic disturbances. To this purpose, caddisflies of the genus Hydropsyche, which are representative riverine insect species, were incubated in two large European rivers, the Rhine and the Meuse. Survival of caddisflies in the River Rhine was fairly high, while there was almost no survival in the River Meuse in three out of five field experiments. The incubations of Hydropsyche in the River Meuse provide evidence that even adequate structural habitat would be insufficient for the reestablishment of Hydropsyche species. The factors limiting the distribution of Hydropsyche species change with the changing constitution of the water; there is not one (group of) compound(s) responsible for the poor water quality. Besides chemical factors, physical factors (like oxygen and current velocity) may be limiting in the River Meuse for Hydropsyche species.

Cesc Murria - One of the best experts on this subject based on the ideXlab platform.

  • higher β and γ diversity at species and genetic levels in headwaters than in mid order streams in Hydropsyche trichoptera
    Freshwater Biology, 2013
    Co-Authors: Cesc Murria, Núria Bonada, Narcís Prat, Miquel A. Arnedo, Alfried P. Vogler
    Abstract:

    Summary The influence of local habitat characteristics and landscape barriers on the distribution of species and genetic diversity remains poorly known. We tested for differences in turnover and total diversity in aquatic insect assemblages among headwater and mid-order reaches, two habitats presumably differing in their connectivity between catchments. The genus Hydropsyche (Trichoptera) includes 17 species in the eastern Iberian Peninsula and northern Morocco. Cytochrome c oxidase subunit I (cox1) gene was sequenced for Hydropsyche assemblages at 38 headwater sites and 12 mid-order sites. Local species and intraspecific genetic diversity and differentiation among populations were measured. A total of 231 cox1 sequences resulted in 83 unique haplotypes that clustered into 19 genetic species entities. We find that α-diversity did not differ between headwater and mid-order habitats at species and genetic levels, but total species numbers and intraspecific genetic diversity (γ-diversity) were higher for headwater than for mid-order or lowland clades, due to greater turnover among sites (β-diversity). The study revealed lineage-specific evolutionary responses to different river zones, presumably because of differences in the strength of landscape barriers. The multispecies community genetic approach provides a comprehensive picture of diversity patterns in Hydropsyche, as it links habitat heterogeneity and dispersal limitations to genetic structure and lineage diversification.

  • Higher β‐ and γ‐diversity at species and genetic levels in headwaters than in mid‐order streams in Hydropsyche (Trichoptera)
    Freshwater Biology, 2013
    Co-Authors: Cesc Murria, Núria Bonada, Narcís Prat, Miquel A. Arnedo, Alfried P. Vogler
    Abstract:

    Summary The influence of local habitat characteristics and landscape barriers on the distribution of species and genetic diversity remains poorly known. We tested for differences in turnover and total diversity in aquatic insect assemblages among headwater and mid-order reaches, two habitats presumably differing in their connectivity between catchments. The genus Hydropsyche (Trichoptera) includes 17 species in the eastern Iberian Peninsula and northern Morocco. Cytochrome c oxidase subunit I (cox1) gene was sequenced for Hydropsyche assemblages at 38 headwater sites and 12 mid-order sites. Local species and intraspecific genetic diversity and differentiation among populations were measured. A total of 231 cox1 sequences resulted in 83 unique haplotypes that clustered into 19 genetic species entities. We find that α-diversity did not differ between headwater and mid-order habitats at species and genetic levels, but total species numbers and intraspecific genetic diversity (γ-diversity) were higher for headwater than for mid-order or lowland clades, due to greater turnover among sites (β-diversity). The study revealed lineage-specific evolutionary responses to different river zones, presumably because of differences in the strength of landscape barriers. The multispecies community genetic approach provides a comprehensive picture of diversity patterns in Hydropsyche, as it links habitat heterogeneity and dispersal limitations to genetic structure and lineage diversification.

  • genetic and morphological approaches to the problematic presence of three Hydropsyche species of the pellucidula group trichoptera hydropsychidae in the westernmost mediterranean basin
    Aquatic Insects, 2010
    Co-Authors: Cesc Murria, Carmen Zamoramunoz, Carles Ribera, Núria Bonada, Narcís Prat
    Abstract:

    Hydropsyche pellucidula and Hydropsyche incognita (Trichoptera, Hydropsychidae) are common and distinguishable species in central Europe. After a review of adult material, the existence of H. pellucidula in the westernmost Mediterranean Basin was considered doubtful and determined that only H. incognita and another close species, Hydropsyche iberomaroccana, were present. Larvae of these three species are indistinguishable when applying traditional morphological keys. Using molecular analyses (cox1 gene sequences), we investigated larvae–adult associations in order to find morphological characteristics to distinguish and identify larvae. Genetic analyses detected the presence of these three species in the westernmost Mediterranean. H. pellucidula was found to be widespread along the Iberian Peninsula while H. incognita was only found in basins draining from high mountain ranges. H. iberomaroccana was distributed in the south of the Iberian Peninsula and North Africa. Using genetically identified material, ...

Pandher, Manpreet S. - One of the best experts on this subject based on the ideXlab platform.

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