caa a22 4500 605509328 CHVBK 20210128100640.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s10452-015-9538-z doi (NATIONALLICENCE)springer-10.1007/s10452-015-9538-z Functional diversity of algal communities from headwater grassland streams: How does it change following afforestation? [Elektronische Daten] [Luciana Cibils, Romina Principe, Javier Márquez, Noemí Gari, Ricardo Albariño] Pine afforestation of grassland streams may lead to changes in species traits and therefore functional diversity of epilithic algal community. Here, we studied trait-based responses in three grassland and three afforested streams in a mountain watershed of Córdoba, Argentina. We hypothesized that afforestation would reduce functional diversity through a simplification of periphyton architecture resulting from reduction in light availability, and that changes in hydrological periods would influence community responses. Algal samples were collected at each stream during two different hydrological periods (high flow and low flow), and physicochemical variables were recorded. Selected traits included strategies and morphological characters related to resource access and disturbance resistance (size, morphological guild, resource requirement, attachment mechanism and life-form). We calculated two indices of functional diversity: Rao's quadratic entropy (FD Q ) and functional variance. Most trait categories showed a significant effect of one or both factors; 26% discriminated between vegetation types, 26% reflect the changes between hydrological periods, and 47% were sensitive to both of them. Our results revealed some categories of traits that can be used to distinguish changes in riparian vegetation, such as unicellular life-form and high-profile guild. Functional diversity of single traits was affected differently by pine afforestation. However, the most integrative index, the FD Q mean, partially supported our hypotheses. Afforestation reduced FD Q mean by 50%, but only during low-flow period. FD Q mean was high and similar between streams at high flow, when environmental factors, such as discharge and temperature, could prevail on differences in riparian vegetation. Springer Science+Business Media Dordrecht, 2015 Exotic pines nationallicence Functional traits nationallicence Hydrological period nationallicence Periphyton nationallicence Riparian vegetation nationallicence Cibils Luciana Departamento de Ciencias Naturales, Universidad Nacional de Río Cuarto (UNRC), Córdoba, Argentina aut Principe Romina Departamento de Ciencias Naturales, Universidad Nacional de Río Cuarto (UNRC), Córdoba, Argentina aut Márquez Javier Departamento de Ciencias Naturales, Universidad Nacional de Río Cuarto (UNRC), Córdoba, Argentina aut Gari Noemí Departamento de Ciencias Naturales, Universidad Nacional de Río Cuarto (UNRC), Córdoba, Argentina aut Albariño Ricardo Laboratorio de Fotobiología, INIBIOMA, CONICET-Universidad Nacional del Comahue, Bariloche, Argentina aut Aquatic Ecology Springer Netherlands 49/4(2015-12-01), 453-466 1386-2588 49:4<453 2015 49 10452 https://doi.org/10.1007/s10452-015-9538-z text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10452-015-9538-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cibils Luciana Departamento de Ciencias Naturales, Universidad Nacional de Río Cuarto (UNRC), Córdoba, Argentina aut NATIONALLICENCE 700 1- Principe Romina Departamento de Ciencias Naturales, Universidad Nacional de Río Cuarto (UNRC), Córdoba, Argentina aut NATIONALLICENCE 700 1- Márquez Javier Departamento de Ciencias Naturales, Universidad Nacional de Río Cuarto (UNRC), Córdoba, Argentina aut NATIONALLICENCE 700 1- Gari Noemí Departamento de Ciencias Naturales, Universidad Nacional de Río Cuarto (UNRC), Córdoba, Argentina aut NATIONALLICENCE 700 1- Albariño Ricardo Laboratorio de Fotobiología, INIBIOMA, CONICET-Universidad Nacional del Comahue, Bariloche, Argentina aut NATIONALLICENCE 773 0- Aquatic Ecology Springer Netherlands 49/4(2015-12-01), 453-466 1386-2588 49:4<453 2015 49 10452