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- Havstad, K. M., et al. Show all 7 Authors
- Rangeland ecology & management 2012 v.65 no.6 pp. 553
- forage; grasses; grasslands; intensive farming; land cover; land use change; livestock; livestock feeds; rangelands; ruminants; rural communities; shrubs; woody plants
- ... Much of the world's rangelands are dominated by woody species. Competing land uses and continued encroachment of woody species into non-woody dominated rangelands have reduced grasslands in many parts of the world. Land use conversions to fuel and feed global populations, especially for increasing numbers of middle class people seeking broader, meat-based diets, will certainly continue. Halting an ...
- Havstad, K., et al. Show all 4 Authors
- Journal of arid environments 2005 v.60 no.3 pp. 423
- deserts; arid zones; grasslands; Bouteloua eriopoda; C4 plants; carbon dioxide; gas exchange; evapotranspiration; precipitation; temporal variation; New Mexico
- ... We measured CO₂ and evapotranspiration (ET) fluxes above a Chihuahuan desert grassland from 1996 through 2001. Averaged across six years, this ecosystem was a source (positive flux) of CO₂ in every month. Over that period, sustained periods of carbon uptake (negative flux) were rare. Averaged across all months, we estimated that CO₂ was being released into the atmosphere at a rate of +1.5 g CO₂ m⁻ ...
- Havstad, K., et al. Show all 6 Authors
- Remote sensing of environment 2000 v.74 no.1 pp. 26
- grasslands; vegetation structure; spatial data; remote sensing; lidar; shrublands; shrubs; rangelands; multispectral imagery; Prosopis; dunes; deserts; New Mexico
- ... Since the 1880s rangeland vegetation in southern New Mexico has changed dramatically over widespread areas, typically with shrublands displacing native grasslands. Coincident with these changes in vegetation dominance are increases in soil erosion, stream channel cutting, and shrub coppice dune formation on sandy soils. Where marked transitions in vegetation type from grassland to honey mesquite s ...