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活動(dòng)簡(jiǎn)介

GeoInsider Webinar

在線(xiàn)講座系列第29期

題目：Nitrogen and phosphorus limitation in global terrestrial ecosystems: Mechanisms, methodology and spatial patterns

報(bào)告人：Dr. Enzai Du, Faculty of Geographical Science, Beijing Normal University

　　　　杜恩在 副教授，北京師范大學(xué) 地理科學(xué)學(xué)部

時(shí)間：北京時(shí)間 7月17日（周五）上午10:00

　　　加州時(shí)間 7月16日（周四）晚上7:00

　　　悉尼時(shí)間 7月17日（周五）中午12:00

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Presentation Abstract

The story of nutrient limitation originated from 1840s, when the famous German chemist Justus Freiherr von Liebig first proposed the Liebig’s Law of the Minimum based on experiments that added essential nutrients to improve crop productivity. One hundred years later, Chapin III et al. investigated the concept of nutrient limitation in natural plant communities and proposed several differences from that in agriculture, especially the diverse nutrient use strategies for different plant species. In 1991, Vitousek and Howarth concluded that “there is substantial evidence that nitrogen limits net primary production much of the time in most terrestrial biomes and many marine ecosystems”. Since the 2000s, numerous ecologists assessed nitrogen and phosphorus limitation based on meta-analyses of global nutrient addition experiments and they concluded a global distribution of nitrogen and phosphorus limitation in terrestrial ecosystems. Meanwhile, many others have also estimated nitrogen and phosphorus limitation via indirect indicators, the widely used one of which is leaf N:P ratio. Although these efforts have greatly improved our understanding of nutrient limitation, global maps of terrestrial nitrogen and phosphorus limitation are still lacking and remain a fundamental question for the fields of terrestrial ecology and biogeochemistry. This talk will tell the story of terrestrial nitrogen and phosphorus limitation from mechanisms, methodology to the spatial patterns.

Linkage:

Nature Geoscience論文鏈接：https://www.nature.com/articles/s41561-019-0530-4

故事背景：https://natureecoevocommunity.nature.com/posts/58039-a-story-of

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作者：GeoInsider