Publication Date

1993

Description

Arid rangelands of northern Chile consist of open shrub formations associated with a seasonal herbaceous stratum. Small pastoralists (comuneros) use the available fodder fer goat raising, by managing individual flocks under continuous grazing. Since each flock spends nights in a corral, a piosphere effect has evolved around it. Through radial transects and quadrals starling from the corral, cover, density, diversity and yield were determined for herbaceous and woody species. Except for shrub diversity and herbage yield, all other total variables showed significant increments with distance. When individual species were considered, different response trends were observed. Some species decreased, others increased, abruptly or progressively, with corral distance; others disappeared or grew better at middle distances. Grass yields, and the frequency of palatable shrubs, increased with distance, contrary to most forbs and non-palatable or toxic shrubs. This spatial degradation near corrals could be prevented through fencing, rest-rotational grazing, shepherding and collective management,

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The Piosphere effect of a Goat Corral on the Productivity of Arid Mediterranean-type Rangelands in Northern Chile

Arid rangelands of northern Chile consist of open shrub formations associated with a seasonal herbaceous stratum. Small pastoralists (comuneros) use the available fodder fer goat raising, by managing individual flocks under continuous grazing. Since each flock spends nights in a corral, a piosphere effect has evolved around it. Through radial transects and quadrals starling from the corral, cover, density, diversity and yield were determined for herbaceous and woody species. Except for shrub diversity and herbage yield, all other total variables showed significant increments with distance. When individual species were considered, different response trends were observed. Some species decreased, others increased, abruptly or progressively, with corral distance; others disappeared or grew better at middle distances. Grass yields, and the frequency of palatable shrubs, increased with distance, contrary to most forbs and non-palatable or toxic shrubs. This spatial degradation near corrals could be prevented through fencing, rest-rotational grazing, shepherding and collective management,