Post-Fire Re-Colonization of Ectomycorrhizal Fungi

火灾后外生菌根真菌的重新定植

• 批准号: 9628852
• 负责人: Thomas Bruns
• 金额: $ 26.5万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-08-15 至 2000-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9628852&HistoricalAwards=false
• 关键词: Post; Fire; Re; Colonization; Ectomycorrhizal

The primary objective of this proposal is to determine how mycorrhizal fungi recolonize the roots of host pine species following fire. The fungi are essential to the health and growth of all trees in the pine family, yet little is currently know about how they survive and re-establish themselves after fire. Most of the research will be conducted at Pt. Reyes National Seashore in naturally regenerating Bishop pine forests. Study sites were selected to take advantage of the recent 5100 hectare wildfire which included several areas where the pre-fire symbiotic fungal community was know in detail. Specific questions to be addressed include: 1) What is the dominant source of post-fire fungi? 2) How is fungal species composition affected by differences in ash deposition, tree mortality, and litter removal? and 3) What effect does fungal inoculum level have on successful seedling establishment? An increased understanding of the dynamics of mycorrhizal populations should have important implications for our understanding of forest dynamics and reforestation practices.

这项建议的主要目标是确定菌根真菌如何在火灾后重新定植寄主松树的根部。这种真菌对松科所有树木的健康和生长都是必不可少的，但目前人们对它们如何在火灾后存活并重新站稳脚跟知之甚少。大部分研究将在PT进行。雷耶斯国家海滨自然更新的毕晓普松林。选择研究地点是为了利用最近5100公顷的野火，其中包括几个详细了解火灾前共生真菌群落的地区。要解决的具体问题包括：1)火灾后真菌的主要来源是什么？2)灰烬沉积、树木死亡率和凋落物清除的差异如何影响真菌种类组成？3)真菌接种量对成苗有什么影响？加强对菌根种群动态的了解，对于我们理解森林动态和植树造林实践具有重要意义。