Degradation influences equilibrium and non-equilibrium dynamics in rangelands: implications in resilience and stability
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.
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Wiley
2022-09
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Subjects: | Amplitud, Pastoreo, Lluvia, Degradación, Grazing, Amplitude, Rain, Degradation, Rangelands, Tierras de Pastos, |
Online Access: | http://hdl.handle.net/20.500.12123/14283 https://onlinelibrary.wiley.com/doi/abs/10.1111/avsc.12670 https://doi.org/10.1111/avsc.12670 |
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Amplitud Pastoreo Lluvia Degradación Grazing Amplitude Rain Degradation Rangelands Tierras de Pastos Amplitud Pastoreo Lluvia Degradación Grazing Amplitude Rain Degradation Rangelands Tierras de Pastos |
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Amplitud Pastoreo Lluvia Degradación Grazing Amplitude Rain Degradation Rangelands Tierras de Pastos Amplitud Pastoreo Lluvia Degradación Grazing Amplitude Rain Degradation Rangelands Tierras de Pastos Lopez, Dardo Ruben Cavallero, Laura Willems, Priscila Mabel Bestelmeyer, Brandon Thomas Brizuela, Miguel Angel Degradation influences equilibrium and non-equilibrium dynamics in rangelands: implications in resilience and stability |
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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. |
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Amplitud Pastoreo Lluvia Degradación Grazing Amplitude Rain Degradation Rangelands Tierras de Pastos |
author |
Lopez, Dardo Ruben Cavallero, Laura Willems, Priscila Mabel Bestelmeyer, Brandon Thomas Brizuela, Miguel Angel |
author_facet |
Lopez, Dardo Ruben Cavallero, Laura Willems, Priscila Mabel Bestelmeyer, Brandon Thomas Brizuela, Miguel Angel |
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Lopez, Dardo Ruben |
title |
Degradation influences equilibrium and non-equilibrium dynamics in rangelands: implications in resilience and stability |
title_short |
Degradation influences equilibrium and non-equilibrium dynamics in rangelands: implications in resilience and stability |
title_full |
Degradation influences equilibrium and non-equilibrium dynamics in rangelands: implications in resilience and stability |
title_fullStr |
Degradation influences equilibrium and non-equilibrium dynamics in rangelands: implications in resilience and stability |
title_full_unstemmed |
Degradation influences equilibrium and non-equilibrium dynamics in rangelands: implications in resilience and stability |
title_sort |
degradation influences equilibrium and non-equilibrium dynamics in rangelands: implications in resilience and stability |
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Wiley |
publishDate |
2022-09 |
url |
http://hdl.handle.net/20.500.12123/14283 https://onlinelibrary.wiley.com/doi/abs/10.1111/avsc.12670 https://doi.org/10.1111/avsc.12670 |
work_keys_str_mv |
AT lopezdardoruben degradationinfluencesequilibriumandnonequilibriumdynamicsinrangelandsimplicationsinresilienceandstability AT cavallerolaura degradationinfluencesequilibriumandnonequilibriumdynamicsinrangelandsimplicationsinresilienceandstability AT willemspriscilamabel degradationinfluencesequilibriumandnonequilibriumdynamicsinrangelandsimplicationsinresilienceandstability AT bestelmeyerbrandonthomas degradationinfluencesequilibriumandnonequilibriumdynamicsinrangelandsimplicationsinresilienceandstability AT brizuelamiguelangel degradationinfluencesequilibriumandnonequilibriumdynamicsinrangelandsimplicationsinresilienceandstability |
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oai:localhost:20.500.12123-142832023-03-21T10:22:13Z Degradation influences equilibrium and non-equilibrium dynamics in rangelands: implications in resilience and stability Lopez, Dardo Ruben Cavallero, Laura Willems, Priscila Mabel Bestelmeyer, Brandon Thomas Brizuela, Miguel Angel Amplitud Pastoreo Lluvia Degradación Grazing Amplitude Rain Degradation Rangelands Tierras de Pastos 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. EEA Manfredi Fil: López, Dardo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Agencia de Extensión Rural Villa Dolores; Argentina Fil: Cavallero, Laura. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Agencia de Extensión Rural Villa Dolores; Argentina Fil: Willems, Priscila. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; Argentina Fil: Bestelmeyer, Brandon Thomas. USDA-ARS. Jornada Experimental Range; Estados Unidos Fil: Brizuela, Miguel Ángel. Universidad Nacional de Mar del Plata; Argentina 2023-03-21T10:08:08Z 2023-03-21T10:08:08Z 2022-09 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/14283 https://onlinelibrary.wiley.com/doi/abs/10.1111/avsc.12670 1654-109X https://doi.org/10.1111/avsc.12670 eng info:eu-repograntAgreement/INTA/PATNOR-1281101/AR./Aportes para el desarrollo de cordillera y precordillera. info:eu-repograntAgreement/INTA/PNPA-1126074/AR./Desarrollo, Integración y transferencia de tecnologías para manejo sustentable de servicios de la vegetación natural para fines ganaderos. info:eu-repograntAgreement/INTA/PNBIO-1131044/AR./Genómica aplicada a estudios de ecología molecular y diversidad genética. info:eu-repograntAgreement/INTA/PNNAT-1128051/AR./Gestión de biodiversidad, servicios ecosistémicos, impactos y resiliencia socio agroambiental en sistemas productivos. info:eu-repograntAgreement/INTA/CORDO-1262204/AR./Gestión de la innovación en el territorio del arco noroeste de la provincia de Córdoba. info:eu-repograntAgreement/INTA/PNAGUA-1133023/AR./Tecnologías para la gestión del agua en cuencas rurales. info:eu-repo/semantics/restrictedAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf Wiley Applied Vegetation Science 25 (3) : e12670. (July/September 2022) |