Forest fragmentation in the Argentine Chaco: recruitment and population patterns of dominant tree species
| Autor: | Rubén Ginzburg, Sebastián Andrés Torrella, Leonardo Galetto |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
geography
education.field_of_study geography.geographical_feature_category Ecology biology Population size Population Biodiversity Temperate forest Plant Science Bioquímica y Biología Molecular Old-growth forest biology.organism_classification Ciencias Biológicas Schinopsis Secondary forest Dominance (ecology) TREES FRAGMENTATION education POPULATION CIENCIAS NATURALES Y EXACTAS |
| DOI: | 10.1007/s11258-015-0532-2 |
| Popis: | The forest in the Central Argentine Chacohas been dramatically fragmented and persists only asisolated patches in an agricultural matrix. In this study,we evaluated the effects of fragmentation on totaldensity, recruitment, and size-class structure of itsdominant tree species, a key issue, although littleexplored, for forest conservation in the region. Weparticularly analyzed the effects of fragment size andforest cover at landscape level on seven of the mostimportant tree species of the forest. Our results suggestthat forest cover at landscape level is more importantthan fragment size to explain the population patternsof the main tree species. Fragment size was relevant inonly one species, Cordia americana, whereas forestcover resulted relevant in five species. The size-classstructure of Schinopsis balansae, one of the dominantspecies of the upper stratum, appeared to be affected inlandscapes with less forest cover, showing lowerdensities of the smaller classes. Our results show thatfor the conservation of the forest it would be importantto increase their protection degree against the expansionof agriculture, attempting to preserve as much ofthe forest as possible, to promote the forest cover atlandscape level and give relevance even to thesmallest fragments. Fil: Torrella, Sebastián Andrés. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Grupo de Estudios de Sistemas Ecológicos en Ambientes Agrícolas; Argentina Fil: Guizburg, Rubén. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Grupo de Estudios de Sistemas Ecológicos en Ambientes Agrícolas; Argentina Fil: Galetto, Leonardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto Multidisciplinario de Biología Vegetal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto Multidisciplinario de Biología Vegetal; Argentina |
| Databáze: | OpenAIRE |
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