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- W4283378697 abstract "Abstract Question Plant communities are structured by both equilibrium and non‐equilibrium dynamics, which interact at different spatiotemporal scales. The influence of external factors on internal regulation processes might depend on ecological state, and thus, on system resilience. We asked if well‐conserved (reference) states have higher resilience to external factors than degraded states, considering the greater capacity for self‐regulation expected of reference states. Location Graminous–subshrubby steppes of northern Patagonia, Argentina. Methods During four years, we assessed the influence of an external factor (rainfall variability) on internal regulation processes (seedling recruitment, growth of main perennial species, and three resilience proxies) in two alternative states (one reference and another degraded) of graminous–subshrubby steppes of northern Patagonia (Argentina). Specifically, we assessed the response of alternative states to simulated high rainfall events (irrigation). Results The degraded state was more sensitive to rainfall variability than the reference state. Specifically, in the degraded state the density of surviving seedlings, the growth of shrubs and Papostipa speciosa ’s relative tiller production and cover increased in response to irrigation; whereas seedling emergence and survival, and grass growth were low or even null without irrigation. Finally, resistance and elasticity were lower whereas malleability was greater in degraded than in reference states. Conclusions The degraded state was less resilient (low resistance and elasticity; high malleability) to stochastic weather events (in response to either increases or decreases in water availability. In contrast, the reference state had a great capacity to respond to rainfall variability. However, demographic processes such as seedling recruitment and vegetative growth were compensated by competition and mortality, suggesting a lower sensitivity to external drivers, and thus, a greater stability. By influencing the balance between equilibrium and non‐equilibrium dynamics, degradation might affect the resilience and stability of the ecosystem. Thus, to prevent rangeland degradation, management plans should anticipate climatically favorable and unfavorable periods." @default.
- W4283378697 created "2022-06-25" @default.
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- W4283378697 date "2022-07-01" @default.
- W4283378697 modified "2023-09-26" @default.
- W4283378697 title "Degradation influences equilibrium and non‐equilibrium dynamics in rangelands: implications in resilience and stability" @default.
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- W4283378697 doi "https://doi.org/10.1111/avsc.12670" @default.
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