全球陆地磷限制的纬度格局。

Latitudinal patterns of terrestrial phosphorus limitation over the globe.

机构信息

Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, USA.

Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China.

出版信息

Ecol Lett. 2021 Jul;24(7):1420-1431. doi: 10.1111/ele.13761. Epub 2021 Apr 24.

Abstract

Phosphorus limitation on terrestrial plant growth is being incorporated into Earth system models. The global pattern of terrestrial phosphorus limitation, however, remains unstudied. Here, we examined the global-scale latitudinal pattern of terrestrial phosphorus limitation by analysing a total of 1068 observations of aboveground plant production response to phosphorus additions at 351 forest, grassland or tundra sites that are distributed globally. The observed phosphorus-addition effect varied greatly (either positive or negative), depending significantly upon fertilisation regime and production measure, but did not change significantly with latitude. In contrast, phosphorus-addition effect standardised by fertilisation regime and production measure was consistently positive and decreased significantly with latitude. Latitudinal gradient in the standardised phosphorus-addition effect was explained by several mechanisms involving substrate age, climate, vegetation type, edaphic properties and biochemical machinery. This study suggests that latitudinal pattern of terrestrial phosphorus limitation is jointly shaped by macro-scale driving forces and the fundamental structure of life.

摘要

陆地植物生长的磷限制正被纳入地球系统模型。然而,陆地磷限制的全球格局仍未得到研究。在这里,我们通过分析全球范围内 351 个森林、草原或苔原地点的地上植物生产力对磷添加的 1068 次观测,研究了全球尺度上陆地磷限制的纬度格局。观察到的磷添加效应变化很大(正面或负面),这取决于施肥制度和产量测量,但与纬度没有显著变化。相比之下,通过施肥制度和产量测量标准化的磷添加效应始终是积极的,并且随着纬度的增加而显著降低。标准化磷添加效应的纬度梯度可以用几种机制来解释,这些机制涉及基质年龄、气候、植被类型、土壤特性和生化机制。本研究表明,陆地磷限制的纬度格局是由宏观尺度驱动力和生命的基本结构共同塑造的。

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