干旱区生态环境知识资源中心(Arid): Biocrust and the soil surface: Influence of climate, disturbance, and biocrust recovery on soil surface roughness

Arid

DOI	10.1016/j.geoderma.2021.115369
	Biocrust and the soil surface: Influence of climate, disturbance, and biocrust recovery on soil surface roughness
	Caster, Joshua; Sankey, Temuulen Ts; Sankey, Joel B.; Bowker, Matthew A.; Buscombe, Daniel; Duniway, Michael C.; Barger, Nichole; Faist, Akasha; Joyal, Taylor
通讯作者	Caster, J (corresponding author), US Geol Survey, Southwest Biol Sci Ctr, Grand Canyon Monitoring & Res Ctr, 2255 N Gemini Rd, Flagstaff, AZ 86001 USA.
来源期刊	GEODERMA
ISSN	0016-7061
EISSN	1872-6259
出版年	2021
卷号	403
英文摘要	Biocrust communities promote soil surface roughness, a key functional characteristic for soil ecology. However, the spatial scales at which biocrust communities contribute to surface roughness are not well understood. To refine our understanding of the spatial dynamics between biocrust and soil surface roughness, we used mm-resolution terrestrial LiDAR to measure micro-topographic roughness at seven sub-meter, 3-dimensional kernels (spatial scales) for undisturbed and disturbed biocrusts within the cool Great Basin and the hot Chihuahuan Deserts of western North America. This multi-scalar approach applied within the different desert regions allowed us to explore two objectives: 1) assess the relative importance of climate and disturbance on biocrust roughness, and 2) evaluate how soil surface roughness evolves with biocrust recovery. For objective 1, we found that undisturbed cool desert biocrust was up to three times rougher than hot desert biocrust. Much of the difference in roughness between the two desert biocrust communities appeared to be from climate or other regional factors. However, positive correlations between roughness and biocrust indicators, including soil chlorophyll-a and the field-based Level of Development (LOD) index, suggested that differences in roughness at spatial scales <= 10 cm are directly related to biocrust development. Mechanical disturbance aimed at removing biocrust resulted in significant reductions in roughness and removed much of the observed differences in roughness between cool and hot desert soils. We evaluated biocrust recovery within the cool desert study area two years after mechanical disturbance and found that the disturbed soil increased in roughness up-to 300%. The increased surface roughness at spatial scales <= 10 cm were positively correlated with increased aggregate stability and indicators of biocrust reestablishment. We found that topographic change area was also an important contributor to roughness at all spatial scales, particularly at spatial scales >= 20 cm where it was the most important factor evaluated. These results provide insight into how biocrust interacts with other biophysical processes to influence soil surface roughness and how soil surfaces evolve at time scales relevant to soil restoration activities.
英文关键词	Biological soil crust LiDAR Remote sensing Soil restoration Surface processes Change detection
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000700885400003
WOS关键词	AGGREGATE STABILITY ; CRUST DEVELOPMENT ; WIND EROSION ; DESERT ; RUNOFF ; TOPOGRAPHY ; REHABILITATION ; REFLECTANCE ; ERODIBILITY ; SAND
WOS类目	Soil Science
WOS研究方向	Agriculture
来源机构	United States Geological Survey ; New Mexico State University
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368154
作者单位	[Caster, Joshua; Sankey, Joel B.] US Geol Survey, Southwest Biol Sci Ctr, Grand Canyon Monitoring & Res Ctr, 2255 N Gemini Rd, Flagstaff, AZ 86001 USA; [Sankey, Temuulen Ts] No Arizona Univ, Sch Informat Comp & Cyber Syst, Flagstaff, AZ USA; [Bowker, Matthew A.] No Arizona Univ, Sch Forestry, Flagstaff, AZ 86011 USA; [Buscombe, Daniel] Marda Sci LLC, Flagstaff, AZ USA; [Duniway, Michael C.] US Geol Survey, Southwest Biol Sci Ctr, Moab, UT USA; [Barger, Nichole] Univ Colorado, Boulder, CO 80309 USA; [Faist, Akasha] New Mexico State Univ, Las Cruces, NM 88003 USA; [Caster, Joshua; Joyal, Taylor] No Arizona Univ, Sch Earth & Sustainabil, Flagstaff, AZ USA
推荐引用方式 GB/T 7714	Caster, Joshua,Sankey, Temuulen Ts,Sankey, Joel B.,et al. Biocrust and the soil surface: Influence of climate, disturbance, and biocrust recovery on soil surface roughness[J]. United States Geological Survey, New Mexico State University,2021,403.
APA	Caster, Joshua.,Sankey, Temuulen Ts.,Sankey, Joel B..,Bowker, Matthew A..,Buscombe, Daniel.,...&Joyal, Taylor.(2021).Biocrust and the soil surface: Influence of climate, disturbance, and biocrust recovery on soil surface roughness.GEODERMA,403.
MLA	Caster, Joshua,et al."Biocrust and the soil surface: Influence of climate, disturbance, and biocrust recovery on soil surface roughness".GEODERMA 403(2021).