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Agriculture and livestock impacts on river floodplain wetlands: a study case from the lower Uruguay river Boletín de la Sociedad
Bena,María Julia; Sirolli,Horacio; Kalesnik,Fabio.
Even though wetlands are very valuable environments, they suffer heavy exploitation and transformation processes that affect their biodiversity. The main goal of this study was to characterize the herbaceous plant communities associated with the southern Uruguay River flood plain. We focused on lowlands of two farms, one of which is surrounded by an embankment to prevent flooding. A random stratified sampling was performed in 72 plots. To detect distribution patterns and plant species associations we performed a Detrended Correspondence Analysis (DCA) and a Two-Way indicator species analysis (TWINSPAN). We could identify six groups of plots whose ordination patterns are related to the flooding preferences of dominant species. Herbaceous plant groups that...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Uruguay river; Dyking; Grazing; Herbaceous communities; Floodable lowlands.
Ano: 2016 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722016000200010
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Seed bank composition in a secondary forest in the Lower Delta of the Paraná River (Argentina) Acta Botanica
Kalesnik,Fábio; Sirolli,Horacio; Collantes,Marta.
The native forests once occupying the coastal levees of the Lower Delta islands of the Paraná River (in Argentina) have been replaced by commercial forests. Many of those forests have been abandoned, resulting in secondary forest formation that is subject to numerous invasive exotic species. A priori observations suggest that successional trends do not lead to recovery of the original forest. The aim of the present study was to analyze the role of invasive exotic species in these environments and the likelihood of recovery of the original forest cover. Therefore, we examined the composition of the seed bank and of the standing vegetation, as well as the population structure of tree species. Secondary forests are described as being in an intermediate...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chinese privet (Ligustrum sinense); Invasive species; Post-abandonment regeneration; Riparian forest; Seedling emergence.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000100006
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