Artículo

Resumen:

La regeneración de la comunidad vegetal, luego de sufrir algún tipo de disturbio, depende de la disponibilidad de propágulos cuya fuente primaria la constituye el banco de semillas del suelo. El objetivo de este trabajo fue analizar la composición florística, abundancia, riqueza y diversidad del banco de semillas y de la comunidad vegetal, y evaluar la relación entre ambos, en un lote agrícola de la llanura pampeana donde se desarrolló una sucesión secundaria a lo largo de 20 años. En la vegetación se registraron 13 especies, entre las cuales predominaron especies perennes y Sorghum halepense fue la dominante. En el banco de semillas se identificaron 12 especies, con predominio de especies anuales. Tres especies: Sorghum halepense, Carduus acanthoides y Verbena bonariensis estuvieron presentes en el banco de semillas y en la vegetación, pero sólo S. halepense mostró una correlación significativa y positiva. Esta escasa relación entre la vegetación y el banco de semillas sugiere que el banco de semillas puede ser de limitada importancia en el reclutamiento, estructura y composición de la comunidad vegetal.

Abstract:

The regeneration of plant community after disturbance depends on the availability of propagules. In grasslands, soil bank is the primary source of propagules, although propagule arrival from neighbouring areas may be important as well. There is evidence that in several grasslands there is a low similarity in floristic composition and in the relative abundance of plant species between the standing vegetation and their soil seed banks. The objective of this study was to evaluate the floristic composition, abundance, richness and diversity of the soil seed bank and the standing vegetation and to assess their relationship, in a closed field of the pampean prairie where a secondary succession has developed after 20 years. Thirty-six samples of vegetation and soil were analysed, classified and ordered with multivariate methods. In the standing vegetation, we recorded a total of 13 species, most of them perennials. The dominant species was Sorghum halepense. In the seed bank, we identified 12 species, most of them annuals, and Portulaca oleracea was the most abundant one. The floristic groups of the standing vegetation were more clearly defined than those groups of the soil seed bank. Three species (Sorghum halepense, Carduus acanthoides and Verbena bonariensis) were present in both the seed bank and the standing vegetation, but only for S. halepense showed a positive correlation between both the seed bank and the standing vegetation. The low similarity between the standing vegetation and the soil seed bank shows that, except for Sorghum halepense, the dominant species of the standing vegetation contribute very little to the development of the soil seed bank.

Registro:

Documento:Publicación periódica
Título:Análisis del banco de semillas y su relación con la vegetación emergente en una clausura de la llanura pampeana
Título alt:Seed bank analysis and its relation to the standing vegetation in an abandoned field of the pampean prairie
Autor:Etchepare, Mariana A.; Boccanelli, Silvia I.
Fecha:2007-06
Titulo revista:Ecología Austral
Editor:Asociación Argentina de Ecología; Argentina.
Handle: http://hdl.handle.net/20.500.12110/ecologiaaustral_v017_n01_p159
Idioma:Español
Palabras clave:Argentina; Pampa; densidad de semillas; disturbio; Sorghum halepense; comunidad vegetal
keywords:Argentina; Pampa; seed density; disturbance; Sorghum halepens; plant community
Año:2007
Volumen:017
Número:01
Página de inicio:159
Página de fin:166
Formato:application/pdf
PDF:https://bibliotecadigital.exactas.uba.ar/download/ecologiaaustral/ecologiaaustral_v017_n01_p159.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/ecologiaaustral/document/ecologiaaustral_v017_n01_p159

Citas:

---------- APA ----------
Etchepare, M.A. & Boccanelli, S.I. (2007) . Seed bank analysis and its relation to the standing vegetation in an abandoned field of the pampean prairie. Ecología Austral, 017 (01) , 159-166.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/ecologiaaustral/document/ecologiaaustral_v017_n01_p159 [ ]
---------- CHICAGO ----------
Etchepare, M.A., Boccanelli, S.I. "Seed bank analysis and its relation to the standing vegetation in an abandoned field of the pampean prairie" . Ecología Austral 017, no. 01 (2007) : 159-166.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/ecologiaaustral/document/ecologiaaustral_v017_n01_p159 [ ]
---------- MLA ----------
Etchepare, M.A., Boccanelli, S.I. "Seed bank analysis and its relation to the standing vegetation in an abandoned field of the pampean prairie" . Ecología Austral, vol. 017, no. 01, 2007, pp. 159-166.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/ecologiaaustral/document/ecologiaaustral_v017_n01_p159 [ ]
---------- VANCOUVER ----------
Etchepare, M.A., Boccanelli, S.I. Seed bank analysis and its relation to the standing vegetation in an abandoned field of the pampean prairie. 2007;017(01):159-166.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/ecologiaaustral/document/ecologiaaustral_v017_n01_p159 [ ]