Describing Surface Soil Properties Their Seasonal Changes and Implications for Management

Grossman, Robert B.; Pringle, Fred B.

doi:10.2136/sssaspecpub20.c6

Cited by 6 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additional soil samples were obtained for 0‐ to 5‐cm depth on small‐plot microsites and were analysed gravimetrically for soil water content. Bulk density was measured at 0‐ to 5‐cm soil depth at random locations across the site using the compliant cavity method (Grossman and Pringle, ). The detachment resistance of surface soil particles was evaluated on all small rainfall plots using an aggregate stability test described by Herrick et al .…”

Section: Methodsmentioning

confidence: 99%

Can wildfire serve as an ecohydrologic threshold‐reversal mechanism on juniper‐encroached shrublands

et al. 2013

View full text Add to dashboard Cite

Woody plant encroachment on water-limited lands can induce a shift from biotic (plant)-controlled resource retention to abiotic (physical)-driven losses of critical soil resources. The biotic-to-abiotic shift occurs where encroachment propagates connectivity of runoff processes and amplified cross-scale erosion that, in-turn, promote ecohydrologic resilience of the post-encroachment community. We investigated these relationships for woodland-encroached sagebrush steppe in the Great Basin, USA, and evaluated wildfire as a mechanism to reverse the post-encroachment soil erosion feedback. We measured vegetation, soil properties, and runoff/ erosion from experimental plots on burned and unburned areas of a late-succession woodland 1 and 2 years post-fire. Our findings suggest that the biotic-to-abiotic shift and amplified cross-scale erosion occur where encroachment-induced bare ground exceeds 50-60% and bare gaps between plant bases frequently extend beyond 1 m. The trigger for amplified cross-scale erosion is formation of concentrated flow within the degraded intercanopy between trees. Burning in this study decreased ecohydrologic resilience of the latesuccession woodland through herbaceous recruitment 2 years post-fire. Increased intercanopy herbaceous productivity decreased connectivity of bare ground, improved infiltration, and reduced erosion, but the study site remained vulnerable to runoff and erosion from high-intensity rainfall. We conclude that burning can reduce woodland ecohydrologic resilience and that woodland encroachment-induced structural and functional ecohydrologic attributes may persist during high-intensity storms for an undetermined period post-fire. We cannot conclude whether wildfire reverses the woodland-induced soil erosion feedback on sagebrush rangelands. However, our results suggest that wildfire may provide a restoration pathway for sagebrush steppe by reducing woodland ecohydrologic resilience over time. Published 2013. This article is a U.S. Government work and is in the public domain in the USA.

show abstract

Section: Methodsmentioning

confidence: 99%

Can wildfire serve as an ecohydrologic threshold‐reversal mechanism on juniper‐encroached shrublands

et al. 2013

View full text Add to dashboard Cite

show abstract

“…Random soil samples were obtained for 0-5 cm depth and were analyzed gravimetrically for soil water content. Bulk density (0-5 cm depth) was measured at multiple locations across the site using the compliant cavity method (Grossman and Pringle 1987). Surface soil aggregate stability for each small plot was determined using a modified sieve test described by Herrick et al (2001Herrick et al ( , 2005.…”

Section: Vegetation and Soils Samplingmentioning

confidence: 99%

Hydrologic and Erosion Responses of Sagebrush Steppe Following Juniper Encroachment, Wildfire, and Tree Cutting

Pierson

Williams

Hardegree

et al. 2013

Rangeland Ecology & Management

191

View full text Add to dashboard Cite

Hamdan. 2013. Hydrologic and erosion responses of sagebrush steppe following juniper encroachment, wildfire, and tree-cutting. Rangeland Ecology and Management 66:274-289. AbstractExtensive woodland expansion in the Great Basin has generated concern regarding ecological impacts of tree encroachment on sagebrush rangelands and strategies for restoring sagebrush steppe. This study used rainfall (0.5 m 2 and 13 m 2 scales) and concentrated flow simulations and measures of vegetation, ground cover, and soils to investigate hydrologic and erosion impacts of western juniper (Juniperus occidentalis Hook.) encroachment into sagebrush steppe and to evaluate short-term effects of burning and tree cutting on runoff and erosion responses. The overall effects of tree encroachment were a reduction in understory vegetation and formation of highly erodible, bare intercanopy between trees. Runoff and erosion from high-intensity rainfall (102 mm Á h À1 , 13 m 2 plots) were generally low from unburned areas underneath tree canopies (13 mm and 48 g Á m À2 ) and were higher from the unburned intercanopy (43 mm and 272 g Á m À2 ). Intercanopy erosion increased linearly with runoff and exponentially where bare ground exceeded 60%. Erosion from simulated concentrated flow was 15-to 25-fold greater from the unburned intercanopy than unburned tree canopy areas. Severe burning amplified erosion from tree canopy plots by a factor of 20 but had a favorable effect on concentrated flow erosion from the intercanopy. Two years postfire, erosion remained 20-fold greater on burned than unburned tree plots, but concentrated flow erosion from the intercanopy (76% of study area) was reduced by herbaceous recruitment. The results indicate burning may amplify runoff and erosion immediately postfire. However, we infer burning that sustains residual understory cover and stimulates vegetation productivity may provide long-term reduction of soil loss relative to woodland persistence. Simply placing cut-downed trees into the unburned intercanopy had minimal immediate impact on infiltration and soil loss. Results suggest cut-tree treatments should focus on establishing tree debris contact with the soil surface if treatments are expected to reduce short-term soil loss during the postcut understory recruitment period.

show abstract

“…Numerous studies link aggregate stability with physical and textural properties (Grossman and Pringle, 1987;Skidmore and Layton, 1992;Wischmeier and Mannering, 1969). Other studies link decreased aggregate stability to cycles of freezing and thawing (Chamberlain and Gow, 1979) and increased aggregation with cycles of wetting and drying (Shiel et al, 1988;Utomo and Dexter, 1982).…”

Section: General Introductionmentioning

confidence: 99%

Fungal Contributions to Soil Aggregation and Soil Quality

Eash

Karlen

Parkin³

2015

SSSA Special Publications

View full text Add to dashboard Cite

Explanation of Dissertation Format 3 PAPER I. ERGOSTEROL AS AN ESTIMATOR OF SOIL FUNGAL BIOMASS 5 INTRODUCTION 6 MATERIALS AND METHODS 13 Ergosterol Extraction 13 Alternative Extraction Method 14 Analytical Method 14 Fungal Cultures 15 Ergosterol Recovery Study ........ 15 RESULTS AND DISCUSSION 16 CONCLUSIONS 22 REFERENCES 25 PAPER II. THE CONTRIBUTIONS OF CHAETOMIUM SP. , RESIDUE ADDITIONS, AND CYCLES OF FREEZE/THAW AND WET/DRY TO SOIL AGGREGATION 30 INTRODUCTION 31 MATERIALS AND METHODS 39 Inoculum 41 Aggregation Measurements 41 Ergosterol and Hyphal Length 43 RESULTS AND DISCUSSION 45 CONCLUSIONS 54 REFERENCES 70 iv PAPER III.

show abstract

Describing Surface Soil Properties Their Seasonal Changes and Implications for Management

Cited by 6 publications

References 6 publications

Can wildfire serve as an ecohydrologic threshold‐reversal mechanism on juniper‐encroached shrublands

Can wildfire serve as an ecohydrologic threshold‐reversal mechanism on juniper‐encroached shrublands

Hydrologic and Erosion Responses of Sagebrush Steppe Following Juniper Encroachment, Wildfire, and Tree Cutting

Fungal Contributions to Soil Aggregation and Soil Quality

Contact Info

Product

Resources

About