Vegetation changes after 15 years of abandonment of crop fields in the Pampas region (Argentina)

Agriculture has been practised in the Argentine Pampa region for more than a century. This long history of disturbance has strongly modified the native vegetation of the region. Some original species have disappeared or its area has been remarkably reduced. The objective was to evalúate vegetation c...

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Autores principales:	Boccanelli,Silvia, Pire,Eduardo, Lewis,Juan
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal 2010
Materias:	Abandoned field agriculture disturbance secondary succession weeds
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202010000200005
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spelling	oai:scielo:S0718-162020100002000052010-10-14Vegetation changes after 15 years of abandonment of crop fields in the Pampas region (Argentina)Boccanelli,SilviaPire,EduardoLewis,Juan Abandoned field agriculture disturbance secondary succession weeds Agriculture has been practised in the Argentine Pampa region for more than a century. This long history of disturbance has strongly modified the native vegetation of the region. Some original species have disappeared or its area has been remarkably reduced. The objective was to evalúate vegetation changes over time after the abandonment of agriculture practice. Our hypothesis was that over time vegetation in this region will evolve towards a "flechillar" (Stipa spp. community) similar to the original vegetation. The experiment was conducted at Zavalla (Santa Fe) Argentina (33° 01' S, 60° 53' W and 50 m.a.s.1.). Vegetation evolution was studied during 15 years (1982-1997) after abandonment, considering four initial crop situations (i.e. wheat, soybean, pasture and tillage). Periodically, we measured species cover and abundance in 60 subplots. Data was analyzed using multivariate methods. We identified several groups corresponding to two very well defined successional stages. The first group was very small, and showed predominance of annual species; the second group showed a reduction or almost disappearance of annuals and an increase in perennials such as Baccharis salicifolia (Ruiz & Pav.) Pers. and Sorghum halepense (L.) Pers. accompanied by Carduus acanthoides L. Therefore, a secondary succession was developed, with a first stage of annual species dominance followed by long life cycle species. However, even after 15 years there was no reversión of the vegetation to the original community.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería ForestalCiencia e investigación agraria v.37 n.2 20102010-08-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202010000200005en10.4067/S0718-16202010000200005
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Abandoned field agriculture disturbance secondary succession weeds
spellingShingle	Abandoned field agriculture disturbance secondary succession weeds Boccanelli,Silvia Pire,Eduardo Lewis,Juan Vegetation changes after 15 years of abandonment of crop fields in the Pampas region (Argentina)
description	Agriculture has been practised in the Argentine Pampa region for more than a century. This long history of disturbance has strongly modified the native vegetation of the region. Some original species have disappeared or its area has been remarkably reduced. The objective was to evalúate vegetation changes over time after the abandonment of agriculture practice. Our hypothesis was that over time vegetation in this region will evolve towards a "flechillar" (Stipa spp. community) similar to the original vegetation. The experiment was conducted at Zavalla (Santa Fe) Argentina (33° 01' S, 60° 53' W and 50 m.a.s.1.). Vegetation evolution was studied during 15 years (1982-1997) after abandonment, considering four initial crop situations (i.e. wheat, soybean, pasture and tillage). Periodically, we measured species cover and abundance in 60 subplots. Data was analyzed using multivariate methods. We identified several groups corresponding to two very well defined successional stages. The first group was very small, and showed predominance of annual species; the second group showed a reduction or almost disappearance of annuals and an increase in perennials such as Baccharis salicifolia (Ruiz & Pav.) Pers. and Sorghum halepense (L.) Pers. accompanied by Carduus acanthoides L. Therefore, a secondary succession was developed, with a first stage of annual species dominance followed by long life cycle species. However, even after 15 years there was no reversión of the vegetation to the original community.
author	Boccanelli,Silvia Pire,Eduardo Lewis,Juan
author_facet	Boccanelli,Silvia Pire,Eduardo Lewis,Juan
author_sort	Boccanelli,Silvia
title	Vegetation changes after 15 years of abandonment of crop fields in the Pampas region (Argentina)
title_short	Vegetation changes after 15 years of abandonment of crop fields in the Pampas region (Argentina)
title_full	Vegetation changes after 15 years of abandonment of crop fields in the Pampas region (Argentina)
title_fullStr	Vegetation changes after 15 years of abandonment of crop fields in the Pampas region (Argentina)
title_full_unstemmed	Vegetation changes after 15 years of abandonment of crop fields in the Pampas region (Argentina)
title_sort	vegetation changes after 15 years of abandonment of crop fields in the pampas region (argentina)
publisher	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal
publishDate	2010
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202010000200005
work_keys_str_mv	AT boccanellisilvia vegetationchangesafter15yearsofabandonmentofcropfieldsinthepampasregionargentina AT pireeduardo vegetationchangesafter15yearsofabandonmentofcropfieldsinthepampasregionargentina AT lewisjuan vegetationchangesafter15yearsofabandonmentofcropfieldsinthepampasregionargentina
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Vegetation changes after 15 years of abandonment of crop fields in the Pampas region (Argentina)

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