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Leaf Nitrogen and Phosphorus Stoichiometry and Its Response to Geographical and Climatic Factors in a Tropical Region: Evidence from Hainan Island

文献类型： 外文期刊

作者： Wang, Jingjing 1 ; Liang, Yongyi 1 ; Wang, Guoan 4 ; Lin, Xiaoyan 1 ; Liu, Jiexi 1 ; Wang, Hao 1 ; Chen, Zixun 4 ; Wu, Bingsun 2 ;

作者机构： 1.Hainan Univ, Sch Forestry, Haikou 570228, Peoples R China

2.Opening Project Fund Key Lab Biol & Genet Resource, State Key Lab Breeding Base Cultivat & Physiol Tro, Danzhou Invest & Expt Stn Trop Crops, Minist Agr & Rural Affairs, Danzhou 571737, Peoples R China

3.Rubber Res Inst, Chinese Acad Trop Agr Sci, Haikou 571101, Peoples R China

4.China Agr Univ, Coll Resources & Environm Sci, Dept Environm Sci & Engn, Beijing Key Lab Farmland Soil Pollut Prevent & Rem, Beijing 100193, Peoples R China

5.Inst Plant Physiol & Ecol, CAS Ctr Excellence Mol Plant Sci, Natl Key Lab Plant Mol Genet, Shanghai 200032, Peoples R China

6.Yangzhou Univ, Coll Int Studies, Yangzhou 225009, Peoples R China

关键词： leaf stoichiometry; climate; geography; life form; Hainan Island

期刊名称：AGRONOMY-BASEL （ 影响因子：3.7； 五年影响因子：4.0 ）

ISSN：

年卷期： 2023 年 13 卷 2 期

页码：

收录情况： SCI

摘要： Leaf stoichiometry effectively indicates the response and adaptation of plants to environmental changes. Although numerous studies on leaf stoichiometry patterns have focused on the mid-latitudes and specific species of plants, these patterns and the effect of the climate change on them across a broad range of plants have remained poorly characterized in hot and humid regions at low latitudes. In the present study, leaf N, P, N:P, C:N, and C:P ratios, were determined from 345 plant leaf samples of 268 species at four forest sites in Hainan Island, China. For all plants, leaf N (3.80 +/- 0.20 mg g(-1)) and P (1.82 +/- 0.07 mg g(-1)) were negatively correlated with latitude and mean annual temperature (MAT) but were positively correlated with longitude. Leaf N was found to be positively correlated with altitude (ALT), and leaf P was positively correlated with mean annual precipitation (MAP). The leaf C:N ratio (278.77 +/- 15.86) was significantly correlated with longitude and ALT, leaf C:P ratio (390.69 +/- 15.15) was significantly correlated with all factors except ALT, and leaf N:P ratio (2.25 +/- 0.10) was significantly correlated with ALT, MAT, and MAP. Comparable results were observed for woody plants. The results suggest that leaf stoichiometry on Hainan Island is affected by changes in geographical and climatic factors. In addition, the low N:P ratio indicates that plant growth may be limited by N availability. Moreover, the significant correlation between leaf N and P implies a possible synergistic relationship between N and P uptake efficiency in the plants of this region. This study helps to reveal the spatial patterns of leaf stoichiometry and their response to global climate change in a variety of plants in tropical regions with hot and humid environments, which may provide an insight in nutrient management in tropical rainforest.

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