24 terms

Biogeomorphology

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Naylor et al., 2002
Bioprotection, bioconstruction, bioerosion
Gowell et al., 2015
Rock-protecting seaweed in intertidal zones
Corenblit et al., 2008
'Ecosystem engineers'
Okin et al., 2013
Large scale vegetation change = global production of dust
Abrahams et al., 2005
Vegetation changes cause increased runoff and erosion by decreasing resistance to overland flow.
Wolfe & Nickling, 1993
Gaps between vegetation are affected by increased shear stress therefore increased erosion
Bailey, 2011
CA model to explore spatial/temporal dynamics of vegetation cover
Suter-Burri et al., 2013
Redistribution of entrained sediment in grass canopies with coloured sand.
Sed mass flux and PM10 conc decreasing with increasing canopy density.
Grass also causes erosion through mvt at the base
Zhang et al., 2011
Development of fertile islands in Steppe Deserts in Inner Mongolia, through sediment being trapped by bushes.
Wagenbrenner et al., 2013
Impacts of fire: stable land turns to dust source
Chepil & Woodruff, 1963
Can affect speeds in the boundary displacement of Z0
Reid et al., 1999
Runoff: short continguous plots versus one long plot. 310mm-90mm
Ludwig et al., 2005
Patches catch water, improve vegetation, interpatches = runoff
Whitford, 1998
Goanna-pit +ve feedback: act as traps for seeds which germinate
Eldridge & Kwok, 2008
Burrowing habits are different among species, habitats and communities depending on which scale the disturbances are examined
Eldridge et al., 2012
Small mammals create voids and depressions that trap organic matter.
Estimate up to 3t/ha soil removal for med-sized vertebrates in E Austr and 7.2t/ha for heteromyid rodents in Chihuahuan Desert
Gabet et al., 2014
Mima mound construction - built by gophers.
Largest amount of soil moved by a mammal relative to body weight.
Rare eg of evolutionary coupling
Chamizo et al., 2015
Crusts are strong and penetration resistant depending on conditions
Viles, 2008
Crusts provide the link between a/biotic
Williams et al., 2012
Crusts are formed in different ways - stabilisation, mineral deposition, wetting and drying.
Crusts trap water and provide a source of nutrients to the surface
Belnap & Gilette, 1998
Crusts have their own microclimates, can change surface stability, hydrology etc.
Lalley & Viles, 2006
Crusts are sensitive to human disturbance - take 10s/100s of years to repair
Lalley & Viles, 2008
Community of moss/lichen making up the crust changes after disturbance
Zhang et al., 2006
Influence of microbiotic crusts on wind erosion in the Garbantunggut Desert, NW China
Threshold friction velocity for 10% disturbance with wind speed 16.04m/s