Restoration ability of seasonal exclosures under different woodland degradation stages in semiarid Chaco rangelands of Argentina

Exclosures are widely used for rangeland restoration in semiarid woodlands. However, grass recovery could be hampered if degradation exceeded certain thresholds. In this study we assessed four years effects of seasonally grazed exclosures –vs. open rangelands– on understory cover (grasses, low shrub...

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Detalles Bibliográficos
Otros Autores: Cotroneo, Santiago Miguel, Jacobo, Elizabeth Juliana, Brassiolo, Miguel M., Golluscio, Rodolfo Angel
Formato: Artículo
Lenguaje:Inglés
Materias:
XEROPHILOUS FOREST
REHABILITATION
EL NIÑO SOUTHERN OSCILLATION (ENSO)
Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2018cotroneo.pdf
LINK AL EDITOR
Aporte de:Registro referencial: Solicitar el recurso aquí
Biblioteca Central (FAUBA) de Universidad de Buenos Aires
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245 1 0 |a Restoration ability of seasonal exclosures under different woodland degradation stages in semiarid Chaco rangelands of Argentina 
520 |a Exclosures are widely used for rangeland restoration in semiarid woodlands. However, grass recovery could be hampered if degradation exceeded certain thresholds. In this study we assessed four years effects of seasonally grazed exclosures –vs. open rangelands– on understory cover (grasses, low shrubs and litter) and peak standing biomass in three increasing degradation stages –mature forests, secondary forests and shrublands – in semiarid Chaco woodlands. We found that grass cover and biomass increased tenfold in four years in mature and secondary forests but remained virtually null in shrublands. In rested forests, the grass cover increments remained relatively constant regardless the annual rainfall amount, both in the driest year 2013 (531 mm) and the wettest year 2015 (924 mm). Only in an extraordinarily wet year (2015) did grass biomass increased in rested shrublands. In that wet year, low shrubs cover –higher at higher overstory degradation– decreased in all woodlands. Our results suggest that shrublands may constitute a new steady state unable to recover by grazing exclusion itself, but probably by its combination with wet periods. 
650 |2 Agrovoc  |9 26 
653 |a XEROPHILOUS FOREST 
653 |a REHABILITATION 
653 |a EL NIÑO SOUTHERN OSCILLATION (ENSO) 
700 1 |a Cotroneo, Santiago Miguel  |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Animal. Cátedra de Forrajicultura. Buenos Aires, Argentina.  |9 32151 
700 1 |a Jacobo, Elizabeth Juliana  |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Animal. Cátedra de Forrajicultura. Buenos Aires, Argentina.  |9 23652 
700 1 |a Brassiolo, Miguel M.  |u Universidad Nacional de Santiago del Estero. Facultad de Ciencias Forestales. Instituto de Silvicultura y Manejo de Bosques. Cátedra de Agrosilvicultura. Santiago del Estero, Argentina.  |9 40487 
700 1 |a Golluscio, Rodolfo Angel  |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Animal. Cátedra de Forrajicultura. Buenos Aires, Argentina.  |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |9 729 
773 0 |t Journal of Arid Environments  |w SECS000553  |g vol.158 (2018), p.28-34, tbls., grafs. 
856 |f 2018cotroneo  |i en reservorio  |q application/pdf  |u http://ri.agro.uba.ar/files/intranet/articulo/2018cotroneo.pdf  |x ARTI201902 
856 |z LINK AL EDITOR  |u http://www.elsevier.com 
942 1 |c ARTICULO 
942 1 |c ENLINEA 
976 |a AAG 

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