The potential of retention trees to mitigate post-harvest soil carbon loss through reduction of root and soil organic matter decomposition mediated by the fungal community

滞留树通过减少真菌群落介导的根部和土壤有机质分解来减轻收获后土壤碳损失的潜力

• 批准号: 430189-2012
• 负责人: Grayston, Susan
• 金额: $ 8.34万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Strategic Projects - Group
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=516445
• 关键词: potential; retention; trees; mitigate; post

This project will investigate whether retention of living 'green-trees' on harvested sites may mitigate postharvest carbon losses from forest ecosystems, and help conserve soil biodiversity and functioning. Among the concerns associated with clearcut-harvesting of forests is enhanced loss of soil C due to altered environmental conditions and changes in soil organisms and rates of degradation processes. Retention of living trees and their associated mycorrhizal fungal partners may retard litter decay in harvested forests, perhaps by competing with, or antagonizing, saprophytic, free-living fungi, or by drying the soil through water uptake. We will use a chronosequence of harvested sites, at the STEMS long-term research installation on Vancouver Island, B.C., to identify the effect of retaining trees on the diversity and activity of soil fungi that are responsible for decomposition processes. The effect of harvesting on soil organisms and associated functions is a critical knowledge gap that precludes certainty about the sustainability of current and proposed forestry practices. The decisive knowledge achieved through this research will allow BC forest managers to develop and use practices that are based on sound, defensible science. B.C.'s Forest Practices Act, Canada's National Forest Strategy and

该项目将调查在采伐现场保留活的“绿树”是否可以减轻森林生态系统采伐后的碳损失，并有助于保护土壤生物多样性和功能。与森林皆伐相关的担忧之一是，由于环境条件的改变以及土壤生物和退化过程速度的变化，土壤碳的流失会增加。保留活的树木及其相关的菌根真菌合作伙伴可能会延迟凋落物腐烂收获的森林，也许是通过竞争，或拮抗，腐殖酸，自由生活的真菌，或通过水分吸收干燥土壤。我们将在不列颠哥伦比亚省温哥华岛的STEMS长期研究设施中使用采集地点的时间序列，确定保留树木对负责分解过程的土壤真菌的多样性和活性的影响。采伐对土壤生物和相关功能的影响是一个重要的知识空白，使人们无法确定目前和拟议的林业做法是否可持续。通过这项研究获得的决定性知识将使BC森林管理人员能够开发和使用基于合理，可辩护的科学的做法。公元前《森林实践法》、加拿大国家森林战略和