Quantifying climate and landscape position controls on soil development in semiarid ecosystems

Rebecca A. Lybrand, Craig Rasmussen

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Soils require study across semiarid ecosystems to better understand soil organic C storage and landscape evolution in water-limited environments. The objective of this research was to quantify soil morphologic development in contrasting climate-vegetation zones and landscape positions along a semiarid environmental gradient. Five ecosystems were examined across The Santa Catalina Mountains, Arizona, that exhibit variation in precipitation (45-95 cm yr-1), temperature (18-9°C), and vegetation (desert scrub to mixed conifer). Granitic soil, saprock, and parent rock were sampled from divergent summit and convergent footslope positions within each ecosystem. Laser particle size analysis was combined with elemental analysis to determine particle size distribution and total C for all soils. Harden's profile development index was applied to explore changes in soil development with climate and landscape position. Soil organic C increased significantly from 0.37 to 1.1 kg m-3 in The transition from desert scrub to mixed conifer convergent soils. Silt concentrations also increased significantly between The two convergent field sites, with values increasing from 4.6 to 23 kg m-3. Profile development indices more than doubled from The desert scrub to mixed conifer sites. At The hillslope scale, indices were similar between desert scrub divergent and convergent landscape positions. However, profile development indices in mixed conifer convergent positions were twofold higher than those of divergent sites, suggesting a stronger topographic control on soil development in The se forests. The results demonstrate links between water availability and soil organic C accumulation, both regionally across climate-vegetation zones and locally at The hillslope scale of study.

Original languageEnglish (US)
Pages (from-to)104-116
Number of pages13
JournalSoil Science Society of America Journal
Volume79
Issue number1
DOIs
StatePublished - Jan 13 2015

Fingerprint

landscape position
climate
scrub
ecosystems
ecosystem
shrublands
conifers
coniferous tree
deserts
desert
soil
organic soils
organic soil
hillslope
vegetation
particle size
landscape evolution
environmental gradient
particle size distribution
water availability

ASJC Scopus subject areas

  • Soil Science

Cite this

Quantifying climate and landscape position controls on soil development in semiarid ecosystems. / Lybrand, Rebecca A.; Rasmussen, Craig.

In: Soil Science Society of America Journal, Vol. 79, No. 1, 13.01.2015, p. 104-116.

Research output: Contribution to journalArticle

@article{86e6d37136824d029105d12791092c5a,
title = "Quantifying climate and landscape position controls on soil development in semiarid ecosystems",
abstract = "Soils require study across semiarid ecosystems to better understand soil organic C storage and landscape evolution in water-limited environments. The objective of this research was to quantify soil morphologic development in contrasting climate-vegetation zones and landscape positions along a semiarid environmental gradient. Five ecosystems were examined across The Santa Catalina Mountains, Arizona, that exhibit variation in precipitation (45-95 cm yr-1), temperature (18-9°C), and vegetation (desert scrub to mixed conifer). Granitic soil, saprock, and parent rock were sampled from divergent summit and convergent footslope positions within each ecosystem. Laser particle size analysis was combined with elemental analysis to determine particle size distribution and total C for all soils. Harden's profile development index was applied to explore changes in soil development with climate and landscape position. Soil organic C increased significantly from 0.37 to 1.1 kg m-3 in The transition from desert scrub to mixed conifer convergent soils. Silt concentrations also increased significantly between The two convergent field sites, with values increasing from 4.6 to 23 kg m-3. Profile development indices more than doubled from The desert scrub to mixed conifer sites. At The hillslope scale, indices were similar between desert scrub divergent and convergent landscape positions. However, profile development indices in mixed conifer convergent positions were twofold higher than those of divergent sites, suggesting a stronger topographic control on soil development in The se forests. The results demonstrate links between water availability and soil organic C accumulation, both regionally across climate-vegetation zones and locally at The hillslope scale of study.",
author = "Lybrand, {Rebecca A.} and Craig Rasmussen",
year = "2015",
month = "1",
day = "13",
doi = "10.2136/sssaj2014.06.0242",
language = "English (US)",
volume = "79",
pages = "104--116",
journal = "Soil Science Society of America Journal",
issn = "0361-5995",
publisher = "Soil Science Society of America",
number = "1",

}

TY - JOUR

T1 - Quantifying climate and landscape position controls on soil development in semiarid ecosystems

AU - Lybrand, Rebecca A.

AU - Rasmussen, Craig

PY - 2015/1/13

Y1 - 2015/1/13

N2 - Soils require study across semiarid ecosystems to better understand soil organic C storage and landscape evolution in water-limited environments. The objective of this research was to quantify soil morphologic development in contrasting climate-vegetation zones and landscape positions along a semiarid environmental gradient. Five ecosystems were examined across The Santa Catalina Mountains, Arizona, that exhibit variation in precipitation (45-95 cm yr-1), temperature (18-9°C), and vegetation (desert scrub to mixed conifer). Granitic soil, saprock, and parent rock were sampled from divergent summit and convergent footslope positions within each ecosystem. Laser particle size analysis was combined with elemental analysis to determine particle size distribution and total C for all soils. Harden's profile development index was applied to explore changes in soil development with climate and landscape position. Soil organic C increased significantly from 0.37 to 1.1 kg m-3 in The transition from desert scrub to mixed conifer convergent soils. Silt concentrations also increased significantly between The two convergent field sites, with values increasing from 4.6 to 23 kg m-3. Profile development indices more than doubled from The desert scrub to mixed conifer sites. At The hillslope scale, indices were similar between desert scrub divergent and convergent landscape positions. However, profile development indices in mixed conifer convergent positions were twofold higher than those of divergent sites, suggesting a stronger topographic control on soil development in The se forests. The results demonstrate links between water availability and soil organic C accumulation, both regionally across climate-vegetation zones and locally at The hillslope scale of study.

AB - Soils require study across semiarid ecosystems to better understand soil organic C storage and landscape evolution in water-limited environments. The objective of this research was to quantify soil morphologic development in contrasting climate-vegetation zones and landscape positions along a semiarid environmental gradient. Five ecosystems were examined across The Santa Catalina Mountains, Arizona, that exhibit variation in precipitation (45-95 cm yr-1), temperature (18-9°C), and vegetation (desert scrub to mixed conifer). Granitic soil, saprock, and parent rock were sampled from divergent summit and convergent footslope positions within each ecosystem. Laser particle size analysis was combined with elemental analysis to determine particle size distribution and total C for all soils. Harden's profile development index was applied to explore changes in soil development with climate and landscape position. Soil organic C increased significantly from 0.37 to 1.1 kg m-3 in The transition from desert scrub to mixed conifer convergent soils. Silt concentrations also increased significantly between The two convergent field sites, with values increasing from 4.6 to 23 kg m-3. Profile development indices more than doubled from The desert scrub to mixed conifer sites. At The hillslope scale, indices were similar between desert scrub divergent and convergent landscape positions. However, profile development indices in mixed conifer convergent positions were twofold higher than those of divergent sites, suggesting a stronger topographic control on soil development in The se forests. The results demonstrate links between water availability and soil organic C accumulation, both regionally across climate-vegetation zones and locally at The hillslope scale of study.

UR - http://www.scopus.com/inward/record.url?scp=84920989596&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84920989596&partnerID=8YFLogxK

U2 - 10.2136/sssaj2014.06.0242

DO - 10.2136/sssaj2014.06.0242

M3 - Article

VL - 79

SP - 104

EP - 116

JO - Soil Science Society of America Journal

JF - Soil Science Society of America Journal

SN - 0361-5995

IS - 1

ER -