2011 Fiscal Year Final Research Report

Changes in plant nitrogen sources during boreal forest succession

Research Project

Project/Area Number	22770020
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Single-year Grants
Research Field	Ecology/Environment
Research Institution	Okayama University
Principal Investigator	HYODO Fujio 岡山大学, 異分野融合先端研究コア, 助教 (70435535)
Project Period (FY)	2010 – 2011
Keywords	寒帯林 / 窒素循環 / 安定同位体 / 遷移 / 野火
Research Abstract	To examine whether plants change nitrogen sources during boreal forest succession, I measured nitrogen isotopic signatures of plants and soil nitrogen across two chronosequences of time frame of approximately 400 years and 5000 years in northern Sweden. I found that the nitrogen isotopic signatures significantly changed along the forest succession. Based on the preliminary results on nitrogen isotope ratios of dissolved nitrogen sources in soil, these results suggest that the importance of dissolved organic nitrogen, biological nitrogen fixation by mosses, and nitrogen derived from mycorrhizal fungi as plant nitrogen source change along the forest succession.

(3 results)