Producción CyT
Artículo
Autoría
PAZ, LAURA ESTEFANIA
;
Rodriguez, Marianela
;
RODRIGUES CAPITULO, ALBERTO
;
SPACCESI, FERNANDO GUSTAVO
;
Armendáriz, Laura Cecilia
;
CORTELEZZI, AGUSTINA
Fecha
2023
Editorial y Lugar de Edición
JOHN WILEY & SONS LTD
Revista
RIVER RESEARCH AND APPLICATIONS,
vol. 39
(pp. 1590-1601)
JOHN WILEY & SONS LTD
Resumen
Información suministrada por el agente en
SIGEVA
Most studies exploring land use impacts have focused on taxonomic metrics, but interest in the functional approach has increased because it helps to understand the relationships between community structure and functioning of aquatic ecosystems. We evaluated how functional and taxonomic approaches, and the association between them, contribute to assessing the effects of land use on macroinvertebrate assemblages of lowland streams. We sampled benthic macroinvertebrates in 17 sites with different ...
Most studies exploring land use impacts have focused on taxonomic metrics, but interest in the functional approach has increased because it helps to understand the relationships between community structure and functioning of aquatic ecosystems. We evaluated how functional and taxonomic approaches, and the association between them, contribute to assessing the effects of land use on macroinvertebrate assemblages of lowland streams. We sampled benthic macroinvertebrates in 17 sites with different land uses (agricultural, peri-urban, and extensive livestock) in Buenos Aires, Argentina. We computed the taxonomic metrics and biotic indexes as well as functional richness (FRic), divergence (FDiv), dispersion (FDis), and Rao diversity indexes for each site. We performed general linear mixed models to compare land-uses, a redundancy analysis, and also performed correlation analysis between taxonomic and functional indexes. Taxonomic richness was significantly higher in extensive livestock than in the other two land uses, while Shannon diversity was significantly different between land uses (extensive livestock > peri-urban > agriculture). FRic and FDiv were significantly lower in peri-urban land use than in agricultural and extensive livestock sites. Only taxonomic richness showed a significant and positive relationship with FRic, FDis, and Rao, but they fit better to a logarithmic function. Therefore, an increase in taxonomic richness and Shannon diversity did not necessarily imply an increase in the functional aspects of the macroinvertebrate assemblage. Using only one of these approaches could lead to partial evaluations and loss of information. Combining them could improve bioindication and predictive potential and help assess the effects of multiple stressors on freshwater ecosystems to improve biomonitoring.
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Palabras Clave
FUNCTIONAL DIVERSITYBIOTIC INDEXESBIOMONITORINGLOWLAND STREAMS
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