预告|GeoInsider在线讲座系列第21期：植物在长期高氮环境的氮沉降适应性假说-热带森林

2020-05-20 21:59 作者:GeoInsider 0人读过 | 我要投稿

活动简介

GeoInsider Webinar

在线讲座系列第21期

题目：Plant acclimation to long-term high nitrogen deposition in an N-rich tropical forest, PNAS paper

报告人：Dr. Xiankai Lu, South China Botanical Garden, Chinese Academy of Sciences/Stanford University
鲁显楷研究员中科院华南植物园/斯坦福大学访问学者期间成果

时间：北京时间 5月22日（周五）上午10:00

加州时间5月21日（周四）晚上7:00

悉尼时间5月22日（周五）中午12:00

参与方式：B站“GeoInsider”直播间平台，直播间可现场留言提问，进入方式如下二选一：

(a) B站直播间链接：https://live.bilibili.com/22243531
(b) B站直播间二维码:

Presentation Abstract

Anthropogenic nitrogen (N) deposition has accelerated terrestrial N cycling at regional and global scales, causing nutrient imbalance in many natural and seminatural ecosystems. How added N affects ecosystems where N is already abundant, and how Plants acclimate to chronic N deposition in such circumstances, remains poorly understood. Here, we conducted an experiment employing a decade of N additions to examine ecosystem responses and Plant acclimation to added N in an N-rich tropical forest. We found that N additions accelerated soil acidification and reduced biologically available cations (especially Ca and Mg) in soils, but Plants maintained foliar nutrient supply at least in part by increasing transpiration while decreasing soil water leaching below the rooting zone. We suggest a hypothesis that cation-deficient Plants can adjust to elevated N deposition by increasing transpiration and thereby maintaining nutrient balance. This result suggests that long-term elevated N deposition can alter hydrological cycling in N-rich forest ecosystems.

Linkage：

PNAS文章链接：https://www.pnas.org/content/115/20/5187.short

GeoInsider简介

GeoInsider是一个最初由旧金山湾区的GeoScience同行自发形成的公益性交流平台，定位在顶级的产学研交叉，包括PNS级讲座、产业应用转化、留学Intern教职申请等交流，迄今已邀请发表过Science、Nature等高水平文章，以及来自Harvard、Berkeley等顶级机构的Webinar报告交流，是一个扩大学术影响力的平台。

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