Subalpine forest carbon cycling: Short-and long-term influence of climate and species

Article Abstract:

An elevational climate and tree species composition gradient in Rocky Mountain subalpine forest that was used to quantify the sensitivity of all major ecosystem carbon stocks and fluxes is described. Over the long term the carbon stock results suggest that the regional warming and drying, Rocky Mountain subalpine forest would be a net source of carbon to the atmosphere.

Science & research, Climatic changes, Climate change, Climate feedbacks

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Dynamic simulation of tree-grass interactions for global change studies

Article Abstract:

The effects of different root systems on vegetation communities are assessed. Shallow-rooted trees enhanced grass productivity, while deep-rooted trees lowered grass productivity and lengthened fire return intervals; shallow-rooted grasses created smaller soil carbon pools, while deep-rooted grasses enhanced nitrogen uptake and the growth of soil organic matter pools.

South Dakota, Forest dynamics, Vegetation dynamics, Wind Cave National Park, South Dakota

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Effects of free-air CO(2) enrichment (FACE) on belowground processes in a Pinus taeda forest

Article Abstract:

Research indicates that free-air carbon dioxide enrichment (FACE) enhances organic matter inputs to soil carbon pools, but may also encourage belowground carbon losses due to increased soil respiration. Data were obtained from a loblolly pine forest, which also demonstrated increased fine root increment and litterfall mass after FACE.

Evaluation, Carbon dioxide, Environmental policy, Soils, Pine, Pines, Soil carbon, Loblolly-pine, Loblolly pine

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