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

该项目将调查在采伐地点保留活的“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。与砍伐森林有关的关切之一是，由于环境条件的改变和土壤有机体的变化以及退化过程的速度，土壤C的流失加剧。活树及其相关菌根真菌伴侣的保留可能通过与腐生、自由生长的真菌竞争或拮抗，或通过吸收水分使土壤干燥，延缓采伐森林中的凋落物腐烂。我们将在不列颠哥伦比亚省温哥华岛的stem长期研究设施中使用采伐地点的时间顺序，以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关键的知识缺口，使人们无法确定当前和拟议的林业做法的可持续性。通过这项研究获得的决定性知识将使不列颠哥伦比亚省森林管理者能够开发和使用基于可靠的、可辩护的科学的实践。公元前美国的《森林实践法》、加拿大的《国家森林战略》和

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