Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13483 |
Multiyear fate of a N-15 tracer in a mixed deciduous forest: retention, redistribution, and differences by mycorrhizal association | |
Goodale, Christine L. | |
2017-02-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY
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ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The impact of atmospheric nitrogen deposition on forest ecosystems depends in large part on its fate. Past tracer studies show that litter and soils dominate the short-term fate of added N-15, yet few have examined its longer term dynamics or differences among forest types. This study examined the fate of a N-15- tracer over 5-6years in a mixed deciduous stand that was evenly composed of trees with ectomycorrhizal and arbuscular mycorrhizal associations. The tracer was expected to slowly mineralize from its main initial fate in litter and surface soil, with some N-15 moving to trees, some to deeper soil, and some net losses. Recovery of added N-15 in trees and litterfall totaled 11.3% both 1 and 5-6years after the tracer addition, as N-15 redistributed from fine and especially coarse roots into cumulative litterfall and small accumulations in woody tissues. Estimates of potential carbon sequestration from tree N-15 recovery amounted to 12-14kg C per kg of N deposition. Tree N-15 acquisition occurred within the first year after the tracer addition, with no subsequent additional net transfer of N-15 from detrital to plant pools. In both years, ectomycorrhizal trees gained 50% more of the tracer than did trees with arbuscular mycorrhizae. Much of the N-15 recovered in wood occurred in tree rings formed prior to the N-15 addition, demonstrating the mobility of N in wood. Tracer recovery rapidly decreased over time in surface litter material and accumulated in both shallow and deep soil, perhaps through mixing by earthworms. Overall, results showed redistribution of tracer N-15 through trees and surface soils without any losses, as whole-ecosystem recovery remained constant between 1 and 5-6years at 70% of the N-15 addition. These results demonstrate the persistent ecosystem retention of N deposition even as it redistributes, without additional plant uptake over this timescale. |
英文关键词 | N-15 tracer arbuscular mycorrhizae ectomycorrhizae nitrogen deposition nitrogen fate nitrogen retention nitrogen uptake |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000394343300035 |
WOS关键词 | SCOTS PINE FOREST ; NITROGEN DEPOSITION ; SOIL CARBON ; TEMPERATE FOREST ; TERRESTRIAL ECOSYSTEMS ; LODGEPOLE PINE ; NITRATE ; LITTER ; GROWTH ; IMMOBILIZATION |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/17536 |
专题 | 气候变化 资源环境科学 |
作者单位 | Cornell Univ, Dept Ecol & Evolutionary Biol, Ithaca, NY 14853 USA |
推荐引用方式 GB/T 7714 | Goodale, Christine L.. Multiyear fate of a N-15 tracer in a mixed deciduous forest: retention, redistribution, and differences by mycorrhizal association[J]. GLOBAL CHANGE BIOLOGY,2017,23(2). |
APA | Goodale, Christine L..(2017).Multiyear fate of a N-15 tracer in a mixed deciduous forest: retention, redistribution, and differences by mycorrhizal association.GLOBAL CHANGE BIOLOGY,23(2). |
MLA | Goodale, Christine L.."Multiyear fate of a N-15 tracer in a mixed deciduous forest: retention, redistribution, and differences by mycorrhizal association".GLOBAL CHANGE BIOLOGY 23.2(2017). |
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