Soil Carbon and Nutrients in a Coastal Oregon Douglas‐Fir Plantation with Red Alder

Cromack, Kermit; Miller, R Eric; Anderson, Harry W.; Helgerson, Ole T.; Smith, Robert B.

doi:10.2136/sssaj1999.03615995006300010034x

Cited by 61 publications

(42 citation statements)

References 28 publications

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“…found that nitrogen-fixing species can significantly increase soil N while others found no correlation between the nitrogen-fixing species and total N accumulation in the surface soil (Cromack et al, 1999;Chen and Li, 2003). The TN content of the soils showed variation between the land use types.…”

Section: Effect Of Land Use On Soil Nutrientsmentioning

confidence: 97%

Effect of land use on soil nutrients in the loess hilly area of the Loess Plateau, China

Gong

Chen

et al. 2005

Land Degrad Dev

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Understanding the effects of land use change on soil properties is important for soil quality improvement and sustainable land use. In this study, six land use types including wasteland (WLD), cropland (CLD), abandoned land (ABD), artificial grassland (AGD), shrubland (SLD) and woodland (WOD) were selected to analyse the effects of land use types on soil nutrient in the Anjiapo catchment in the western part of the Loess Plateau in China. Significant differences were found in soil organic matter (SOM), total nitrogen (TN) and nitrate nitrogen (NON) (P < 0.01) between the six land use types. Our study also showed that land use types have different effects on soil nutrient storage, and vegetation restoration may improve soil nutrients and soil quality. While crop plantation can significantly decrease soil fertility, the trend can be reversed by cropland abandonment and afforestation. It is recommended that more C input, alternative cultivation practices, vegetation restoration and education and techniques training of local farmers could be used to improve soil conditions and to advance the sustainable land use and local development in the loess hilly area in the Loess Plateau of China.

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Section: Effect Of Land Use On Soil Nutrientsmentioning

confidence: 97%

Effect of land use on soil nutrients in the loess hilly area of the Loess Plateau, China

Gong

Chen

et al. 2005

Land Degrad Dev

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“…Initial losses may be related to increased rates of decomposition and litter inputs to soil (e.g., Covington 1981, Peltoniemi et al 2004, Stoffel et al 2010, Forrester et al 2012, but see Yanai et al 2003). Although, belowground C pools may recover over time (Cromack et al 1999, McLaughlin and Phillips 2006, Powers et al 2012, all treatments (thinned and unthinned) have most likely incurred a carbon debt as a result of clearcutting ;60-80 years ago (Rhemtulla et al 2009). Thus, carbon pools in fully stocked untreated controls likely remain below the upper bound of on-site carbon storage for these sites (Smithwick et al 2002, Peltoniemi et al 2004).…”

Section: Effects Of Thinning On C Storagementioning

confidence: 99%

Management trade‐off between aboveground carbon storage and understory plant species richness in temperate forests

Burton

Ares

Olson

et al. 2013

Ecological Applications

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Abstract. Because forest ecosystems have the capacity to store large quantities of carbon (C), there is interest in managing forests to mitigate elevated CO 2 concentrations and associated effects on the global climate. However, some mitigation techniques may contrast with management strategies for other goals, such as maintaining and restoring biodiversity. Forest thinning reduces C storage in the overstory and recruitment of detrital C. These C stores can affect environmental conditions and resource availability in the understory, driving patterns in the distribution of early and late-seral species. We examined the effects of replicated (N ¼ 7) thinning experiments on aboveground C and understory vascular plant species richness, and we contrasted relationships between aboveground C and early-vs. lateseral species richness. Finally, we used structural equation modeling (SEM) to examine relationships among early-and late-seral species richness and live and detrital aboveground C stores.Six years following thinning, aboveground C was greater in the high-density treatment and untreated control than in moderate-(MD) and variable-density (VD) treatments as a result of reductions in live overstory C. In contrast, all thinning treatments increased species richness relative to controls. Between the growing seasons of years 6 and 11 following treatments, the live overstory C increment tended to increase with residual density, while richness decreased in MD and VD treatments. The richness of early-seral species was negatively related to aboveground C in MD and VD, while late-seral species richness was positively (albeit weakly) related to aboveground C. Structural equation modeling analysis revealed strong negative effects of live overstory C on early-seral species richness balanced against weaker positive effects on late-seral species richness, as well as positive effects of detrital C stocks. A trade-off between carbon and plant species richness thus emerges as a net result of these relationships among species traits, thinning treatments, and live and detrital C storage. Integrating C storage with traditional conservation objectives may require managing this trade-off within stands and landscapes (e.g., maintain early-seral habitat and species within dense, C-rich forests and, conversely, live and detrital C stores in early-seral habitats) or separating these goals across scales and species groupings.

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“…2c), a pattern that has also been observed in previous studies. Assuming C is 45% of loss-on-ignition, forest floor C ranged from 6 to 27 Mg C ha-' in hundred-year-old Douglas-fir forests in the Oregon Coast Range (Youngberg, 1966), and averaged 35 Mg C ha-' in duff mull and 62 Mg C ha-' in rnor forest floors of old-growth of Cromack et al (1999), who examined an Oregon forests in western Washington (Gessel and Balci, 1965). The mineral soil contained ~2 0 % of the TEC (Table 2), more than half of which was below 20 cm depth.…”

Section: Old-growth C Poolsmentioning

confidence: 99%

What the soil reveals: Potential total ecosystem C stores of the Pacific Northwest region, USA

Homann

Harmon

Remillard

et al. 2005

Forest Ecology and Management

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How much organic C can a region naturally store in its ecosystems? How can this be determined, when land management has altered the vegetation of the landscape substantially? The answers may lie in the soil: this study synthesized the spatial distribution of soil properties derived from the state soils geographic database with empirical measurements of old-growth forest ecosystem C to yield a regional distribution of potential maximum total-ecosystem organic C stores. The region under consideration is 179,000 square kilometers extending from the southern Oregon border to the northern Washington border, and from the Pacific Ocean to the east side of the Cascade Mountains. Total ecosystem organic C (TEC) was measured in 16 diverse old-growth forests encompassing 35 stands and 79 pedons to a depth of 100 cm. The TEC ranged between 185 and 1200 Mg C ha-'. On an average, 63% of TEC was in the vegetation, 13% in woody detritus, 3% in the forest floor, 7% in the 0-20 cm mineral soil, and 13% in 20-100 cm mineral soil. The TEC was strongly related to soil organic C (SOC) in the 0-20 cm mineral soil, yielding a monotonically increasing, curvilinear relation. To apply this relation to estimate the TEC distribution throughout the region, 21 1 map units of the state soils geographic database (STATSGO) were used. The SOC in the 0-20 cm mineral soil of the map units was consistent with values from previously measured pedons distributed throughout the region. Resampling of 13 second-growth forests 25 years after initial sampling indicated no regional change in mineral SOC, and supported the use of a static state soils map. The SOC spatial distribution combined with the quantitative old-growth TEC-SOC relation yielded an estimate of potential TEC storage throughout the region under the hypothetical condition of old-growth forest coverage. The area-weighted TEC was 760 Mg C ha-'. This is -100 Mg C ha-' more than a previous estimate based on a coarser resolution of six physiographic provinces, and -400 Mg C ha-' more than current regional stores. The map of potential . TEC may be useful in forecasting regional C dynamics and in iand-management decisions related to C sequestration.

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Soil Carbon and Nutrients in a Coastal Oregon Douglas‐Fir Plantation with Red Alder

Cited by 61 publications

References 28 publications

Effect of land use on soil nutrients in the loess hilly area of the Loess Plateau, China

Effect of land use on soil nutrients in the loess hilly area of the Loess Plateau, China

Management trade‐off between aboveground carbon storage and understory plant species richness in temperate forests

What the soil reveals: Potential total ecosystem C stores of the Pacific Northwest region, USA

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