Magnitude Shifts in Aeolian Sediment Transport Associated With Degradation and Restoration Thresholds in Drylands DOI Creative Commons
Nicholas P. Webb, Brandi Wheeler, Brandon L. Edwards

et al.

Journal of Geophysical Research Biogeosciences, Journal Year: 2025, Volume and Issue: 130(3)

Published: March 1, 2025

Abstract Vegetation change in drylands can influence wind erosion and sand dust storms (SDS) with far‐reaching consequences for Earth systems society. Although vegetation is recognized as an important control on SDS, the interactions are not well described at landscape level or context of dryland ecosystem change. The transition sites from one ecological state to another (e.g., grassland shrubland) typically associated changes composition, cover, structure vegetation, which drag partitioning shear velocities that drive aeolian sediment transport. Here, we quantify magnitude direction transport responses northern Chihuahuan Desert identify thresholds transitions. Our results show mass flux ( Q ) increased ∼1 10 g m −1 d historical scattered shrubs ∼10–100 following shrub invasion decline perennial grass cover ∼100–10,000 shrubland complete loss. shifts were critical governing nonlinear increases across Grass recovery reduced rates similar those grasslands—a multiple order reduction. crossing degradation restoration between alternative states have a profound effect spatiotemporal variability primacy determining patterns emissions vegetated drylands.

Language: Английский

Magnitude Shifts in Aeolian Sediment Transport Associated With Degradation and Restoration Thresholds in Drylands DOI Creative Commons
Nicholas P. Webb, Brandi Wheeler, Brandon L. Edwards

et al.

Journal of Geophysical Research Biogeosciences, Journal Year: 2025, Volume and Issue: 130(3)

Published: March 1, 2025

Abstract Vegetation change in drylands can influence wind erosion and sand dust storms (SDS) with far‐reaching consequences for Earth systems society. Although vegetation is recognized as an important control on SDS, the interactions are not well described at landscape level or context of dryland ecosystem change. The transition sites from one ecological state to another (e.g., grassland shrubland) typically associated changes composition, cover, structure vegetation, which drag partitioning shear velocities that drive aeolian sediment transport. Here, we quantify magnitude direction transport responses northern Chihuahuan Desert identify thresholds transitions. Our results show mass flux ( Q ) increased ∼1 10 g m −1 d historical scattered shrubs ∼10–100 following shrub invasion decline perennial grass cover ∼100–10,000 shrubland complete loss. shifts were critical governing nonlinear increases across Grass recovery reduced rates similar those grasslands—a multiple order reduction. crossing degradation restoration between alternative states have a profound effect spatiotemporal variability primacy determining patterns emissions vegetated drylands.

Language: Английский

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