Seed mass of angiosperm woody plants better explained by life history traits than climate across China.
Seed mass of angiosperm woody plants better explained by life history traits than climate across China.
复制标题
中国被子植物木本植物的种子质量可以通过生活史特征比气候更好地解释
DOI：
10.1038/s41598-017-03076-2
复制
发表时间：
2017-06-02
影响因子：
4.6
通讯作者：
Wang X
中科院分区：
文献类型：
--
作者：
Zheng J;Guo Z;Wang X
种子质量是功能生态学研究中的一个基本性状。研究种子质量如何受到生物和非生物因素的影响，可以提高我们对植物生态策略的理解。本文根据中国地区1265种木本被子植物的种子质量数据，分析了种子质量与13个气候变量和7个生活史性状的关系，并划分了生活史性状与气候的相对效应。结果表明，种子质量随纬度的增加而减小，大多数气候变量与种子质量呈正相关。地理种子质量格局受生长季能量和水分供应的共同影响，但能量供应的影响更为重要。种子质量与生长形态、果实类型、散布方式、繁育系统、叶片习性、果实发育时间、最小幼龄等其他性状也存在显著相关，其中生长形态和散布方式的相关最大。我们的结果表明，气候对种子质量变化的解释比生活史特征要小得多，而系统发育在形成种子质量的大规模格局中起着重要作用。
Seed mass is a basic trait in studies of functional ecology. Examining how seed mass is affected by biotic and abiotic factors could improve our understanding of ecological strategies in plants. Here we examined the relationships of seed mass with 13 climate variables and seven life history traits, and partitioned the relative effects of life history traits vs. climate, based on seed mass data for 1265 woody angiosperm species in China. Our results showed that seed mass decreased with latitude, and most climate variables were positively correlated with seed mass. Geographic seed mass pattern was affected by both energy and water availability in the growing season, but the effect of energy availability was more important. Seed mass was also significantly related to other traits such as growth form, fruit type, dispersal mode, breeding system, leaf habit, fruit development time, and minimum juvenile period, with growth form and dispersal mode being the most closely related traits. Our results showed that climate explained much less variation in seed mass than life history traits, and that phylogeny played an important role in shaping the large-scale patterns of seed mass.