Catastrophic vegetation shifts and soil degradation in terrestrial grazing systems
نویسندگان
چکیده
منابع مشابه
Abandonment in grazing systems: Consequences for vegetation and soil
Many dehesa zones in marginal areas are suffering from the abandonment of traditional farming practices. Herbivore grazing affects grassland dynamics, changing the species colonisation and extinction relationships via consumption, mechanical disturbance, seed dispersal and altered soil fertility due to dung-borne nutrient input. This paper analyses changes to floristic composition, species rich...
متن کاملSpatial heterogeneity and irreversible vegetation change in semiarid grazing systems.
Recent theoretical studies have shown that spatial redistribution of surface water may explain the occurrence of patterns of alternating vegetated and degraded patches in semiarid grasslands. These results implied, however, that spatial redistribution processes cannot explain the collapse of production on coarser scales observed in these systems. We present a spatially explicit vegetation model...
متن کاملGrazing impact on vegetation cover and some soil factors (Case study: Houz-e-Soltan Lake, Qom)
Grazing effect on vegetation cover and soil factors in natural environments is inevitable. The present study was conducted to investigate the effect of grazing on soil factors and distribution of plant species in grazed and non-grazed areas in rangelands of western parts of Hoz-e-Soltan Lake, Qom. Systematic-randomized sampling method was used alongside of 4 transects. Adjacent to the transects...
متن کاملPredicting catastrophic shifts.
Catastrophic shifts are known to pose a serious threat to ecology, and a reliable set of early warning indicators is desperately needed. However, the tools suggested so far have two problems. First, they cannot discriminate between a smooth transition and an imminent irreversible shift. Second, they aimed at predicting the tipping point where a state loses its stability, but in noisy spatial sy...
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ژورنال
عنوان ژورنال: Trends in Ecology & Evolution
سال: 1997
ISSN: 0169-5347
DOI: 10.1016/s0169-5347(97)01133-6