caa a22 4500 445894660 CHVBK 20180317145627.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s10750-010-0599-7 doi (NATIONALLICENCE)springer-10.1007/s10750-010-0599-7 Effects of macrophyte heterogeneity and food availability on structural parameters of the macroinvertebrate community in a Pampean stream [Elektronische Daten] [Nicolás Ferreiro, Claudia Feijoó, Adonis Giorgi, Leonardo Leggieri] Environmental heterogeneity in natural ecosystems influences several parameters at the population and community levels. In freshwater ecosystems, habitat heterogeneity can be provided by macrophyte species with different structural shapes. Previous studies suggest that aquatic plants with more complex architectures will support higher number, biomass, and taxon richness of macroinvertebrates than plants with simpler shape. We investigated the influence of macrophyte structural heterogeneity (quantified by fractal dimension) and food availability (represented by epiphytic biomass) on several parameters (number of individuals, biomass, body size distribution, taxon richness, and diversity) of the macroinvertebrate community in a Pampean stream. Four submerged macrophyte species (Egeria densa, Elodea ernstae, Ceratophyllum demersum, and Stuckenia striata) and associated macroinvertebrates were sampled in late spring, summer, and autumn. Plants were photographed and fractal dimension was estimated from the images by the box-counting method. Fractal dimension was independent of plant surface area per unit of macrophyte biomass and differed significantly among species. Mean fractal dimension varied between 1.29 and 1.62, and increased following the sequence E. densa→S. striata→E. ernstae→C. demersum. Macrophyte species with higher fractal dimension supported a greater abundance of macroinvertebrates, especially those of small body size (500-1,000μm); but fractal dimension was unrelated to macroinvertebrate biomass, richness, and diversity. However, overall animal biomass was significantly associated to the epiphytic abundance. Consequently, macrophyte heterogeneity influences macroinvertebrate density and body size distribution, while animal biomass depends on epiphytic food resources provided by plants. Springer Science+Business Media B.V., 2011 Macrophytes nationallicence Heterogeneity nationallicence Macroinvertebrates nationallicence Food availability nationallicence Ferreiro Nicolás Instituto de Ecología y Desarrollo Sustentables (INEDES) and Departamento de Ciencias Básicas, Universidad Nacional de Luján, Ruta 5 y Avenida Constitución, B6700APJ, Buenos Aires, Ciudad de Luján, Argentina aut Feijoó Claudia Instituto de Ecología y Desarrollo Sustentables (INEDES) and Departamento de Ciencias Básicas, Universidad Nacional de Luján, Ruta 5 y Avenida Constitución, B6700APJ, Buenos Aires, Ciudad de Luján, Argentina aut Giorgi Adonis Instituto de Ecología y Desarrollo Sustentables (INEDES) and Departamento de Ciencias Básicas, Universidad Nacional de Luján, Ruta 5 y Avenida Constitución, B6700APJ, Buenos Aires, Ciudad de Luján, Argentina aut Leggieri Leonardo Instituto de Ecología y Desarrollo Sustentables (INEDES) and Departamento de Ciencias Básicas, Universidad Nacional de Luján, Ruta 5 y Avenida Constitución, B6700APJ, Buenos Aires, Ciudad de Luján, Argentina aut Hydrobiologia Springer Netherlands 664/1(2011-04-01), 199-211 0018-8158 664:1<199 2011 664 10750 https://doi.org/10.1007/s10750-010-0599-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-010-0599-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ferreiro Nicolás Instituto de Ecología y Desarrollo Sustentables (INEDES) and Departamento de Ciencias Básicas, Universidad Nacional de Luján, Ruta 5 y Avenida Constitución, B6700APJ, Buenos Aires, Ciudad de Luján, Argentina aut NATIONALLICENCE 700 1- Feijoó Claudia Instituto de Ecología y Desarrollo Sustentables (INEDES) and Departamento de Ciencias Básicas, Universidad Nacional de Luján, Ruta 5 y Avenida Constitución, B6700APJ, Buenos Aires, Ciudad de Luján, Argentina aut NATIONALLICENCE 700 1- Giorgi Adonis Instituto de Ecología y Desarrollo Sustentables (INEDES) and Departamento de Ciencias Básicas, Universidad Nacional de Luján, Ruta 5 y Avenida Constitución, B6700APJ, Buenos Aires, Ciudad de Luján, Argentina aut NATIONALLICENCE 700 1- Leggieri Leonardo Instituto de Ecología y Desarrollo Sustentables (INEDES) and Departamento de Ciencias Básicas, Universidad Nacional de Luján, Ruta 5 y Avenida Constitución, B6700APJ, Buenos Aires, Ciudad de Luján, Argentina aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 664/1(2011-04-01), 199-211 0018-8158 664:1<199 2011 664 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer