Interactive effects of grazing and burning on wind- and water-driven sediment fluxes: Rangeland management implications

Jason P. Field, David D Breshears, Jeffrey J. Whicker, Chris B. Zou

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Rangelands are globally extensive, provide fundamental ecosystem services, and are tightly coupled human-ecological systems. Rangeland sustainability depends largely on the implementation and utilization of various grazing and burning practices optimized to protect against soil erosion and transport. In many cases, however, land management practices lead to increased soil erosion and sediment fluxes for reasons that are poorly understood. Because few studies have directly measured both wind and water erosion and transport, an assessment of how they may differentially respond to grazing and burning practices is lacking. Here, we report simultaneous, co-located estimates of wind- and water-driven sediment transport in a semiarid grassland in Arizona, USA, over three years for four land management treatments: control, grazed, burned, and burned grazed. For all treatments and most years, annual rates of wind-driven sediment transport exceeded that of water due to a combination of ongoing small but nontrivial wind events and larger, less frequent, wind events that generally preceded the monsoon season. Sediment fluxes by both wind and water differed consistently by treatment: burned + grazed > burned > grazed ≥ control, with effects immediately apparent after burning but delayed after grazing until the following growing season. Notably, the wind : water sediment transport ratio decreased following burning but increased following grazing. Our results show how rangeland practices disproportionally alter sediment fluxes driven by wind and water, differences that could potentially help explain divergence between rangeland sustainability and degradataion.

Original languageEnglish (US)
Pages (from-to)22-32
Number of pages11
JournalEcological Applications
Volume21
Issue number1
DOIs
StatePublished - Jan 2011

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rangeland
grazing
sediment
sediment transport
water
land management
soil erosion
sustainability
water erosion
wind erosion
effect
ecosystem service
management practice
monsoon
growing season
divergence
grassland

Keywords

  • Aeolian transport
  • Erosion
  • Fire
  • Fluvial transport
  • Grassland
  • Livestock
  • Resource redistribution
  • Sediment transport
  • Soil

ASJC Scopus subject areas

  • Ecology

Cite this

Interactive effects of grazing and burning on wind- and water-driven sediment fluxes : Rangeland management implications. / Field, Jason P.; Breshears, David D; Whicker, Jeffrey J.; Zou, Chris B.

In: Ecological Applications, Vol. 21, No. 1, 01.2011, p. 22-32.

Research output: Contribution to journalArticle

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