Plant species diversity in remnant grasslands on arable soils in the cropping Pampa

In order to provide a baseline for management decisions, we evaluated vegetation heterogeneity among 38 remnant grasslands located on high agronomic potential soils along a five degree-east-west transect in the cropping Pampa. This extensive region has been cultivated for well over a century, small-...

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Detalles Bibliográficos
Otros Autores: Burkart, Silvia Elena, León, Rolando Juan Carlos, Conde, María Cecilia, Perelman, Susana Beatríz
Formato: Artículo
Lenguaje:Inglés
Materias:
AGRICULTURAL LANDSCAPE
ENVIRONMENTAL VARIABLES
EXOTICS
INVASIBILITY
NATIVE GRASSES
PLANT FUNCTIONAL GROUPS
AGRONOMY
ARABLE LAND
BASELINE CONDITIONS
BIODIVERSITY
CANONICAL ANALYSIS
CONSERVATION MANAGEMENT
DECISION MAKING
FUNCTIONAL GROUP
GRASS
GRASSLAND
HETEROGENEITY
INVASIVE SPECIES
NATIVE SPECIES
RESTORATION ECOLOGY
WATER AVAILABILITY
ARGENTINA
PAMPAS
POACEAE
Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2011Burkart.pdf
LINK AL EDITOR
Aporte de:Registro referencial: Solicitar el recurso aquí
Biblioteca Central (FAUBA) de Universidad de Buenos Aires
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520 |a In order to provide a baseline for management decisions, we evaluated vegetation heterogeneity among 38 remnant grasslands located on high agronomic potential soils along a five degree-east-west transect in the cropping Pampa. This extensive region has been cultivated for well over a century, small-scale traditional forms of agriculture were progressively replaced with large-scale industrial forms and its cropped area has more than doubled in the last 25 years, threatening the maintenance of biodiversity associated to productive soils. We characterized the diversity of this grassland patches, identified its main environmental drivers and searched for factors that favor their invasion by exotic plant species. Vegetation samples were analysed through Canonical Correspondence Analysis, proportional distribution of functional groups was compared and regression models were estimated to identify variables associated with exotic species importance. Water availability, determined by climate and soil characteristics, was the main driving factor of floristic heterogeneity in these grasslands. Exotic richness, mostly of Eurasian species, increases toward the east, related to proximity to the entrance port. The functional group of C4 native grasses seems to be responsible for biotic resistance to invasion. More than 80 percent of the species recorded during the first vegetation registers in 1930 are still present, while the number of exotics was seven-fold increased. Despite covering small areas as isolated stands, these are hot spots of native biodiversity and must be the object of increasing attention for conservation and restoration in order to protect the biodiversity of an extensive agricultural landscape. 
653 0 |a AGRICULTURAL LANDSCAPE 
653 0 |a ENVIRONMENTAL VARIABLES 
653 0 |a EXOTICS 
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653 0 |a NATIVE GRASSES 
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653 0 |a WATER AVAILABILITY 
653 0 |a ARGENTINA 
653 0 |a PAMPAS 
653 0 |a POACEAE 
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773 |t Plant Ecology  |g Vol.212, no.6 (2011), p.1009-1024 
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900 |a ^aBurkart^bS.E.^tIFEVA-Facultad de Agronomía, UBA/CONICET, Buenos Aires, Argentina 
900 |a ^aLeón^bR.J.C.^tDepartamento Recursos Naturales y Ambiente, Facultad de Agronomía, UBA, Av. San Martín 4453, C1417DSE Buenos Aires, Argentina 
900 |a ^aConde^bM.C.^tDepartamento Métodos Cuantitativos y Sistemas de Información, Facultad de Agronomía, UBA, Av. San Martín 4453, C1417DSE Buenos Aires, Argentina 
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900 |a AGRICULTURAL LANDSCAPE 
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900 |a EXOTICS 
900 |a INVASIBILITY 
900 |a NATIVE GRASSES 
900 |a PLANT FUNCTIONAL GROUPS 
900 |a AGRONOMY 
900 |a ARABLE LAND 
900 |a BASELINE CONDITIONS 
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