Advantages of Small-Seeded Species in Forests: Win-Win for Temporal and Spatial Dispersal among Seeds in Rhododendron

IF 0.4 4区 环境科学与生态学 Q4 ECOLOGY Polish Journal of Ecology Pub Date : 2019-06-21 DOI:10.3161/15052249PJE2019.67.1.002
Haiyang Wang, X. Lai, Yanru Zhang, Hong Chen
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引用次数: 1

Abstract

There is little consistent evidence for evolutionary associations from seed production to seedling fitness. In this study, 20 species of Rhododendron genus were selected from subtropical forests of southwest China; the life-history functional traits such as the seed size, seed number per twig, germination traits, dispersal and seedling survival were investigated, the ecological relationships among them were tested and the advantages of small-seeded species were discussed. The results show that the quantitative parameters of germination, such as the germination rate, potential, and index are positively correlated with seed number produced per stem, while temporal parameters, such as germination peak timing and duration are positively correlated with seed size. The two results indicate that different Rhododendron species with different seed sizes and relative seed number can deal with varying environments according to spatial dispersal or time dispersal, respectively, and the advantages of smaller seeds in the aspect of sprouting vigour, dispersal ability and seedling survival may lay the foundation for the establishment of small-seeded plants in the forest.
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小种子物种在森林中的优势:杜鹃花种子间时空传播的双赢
从种子生产到幼苗适应性的进化关联几乎没有一致的证据。本研究从中国西南亚热带森林中筛选出20种杜鹃属植物;研究了种子大小、每枝种子数、发芽特性、扩散特性和幼苗存活等生活史功能特性,并对它们之间的生态关系进行了测试,探讨了小种子种的优势。结果表明,发芽的定量参数,如发芽率、潜力和指数,与每茎产生的种子数量呈正相关,而发芽高峰时间和持续时间等时间参数与种子大小呈正相关。两个结果表明,不同种子大小和相对种子数的杜鹃品种可以分别根据空间扩散或时间扩散处理不同的环境,扩散能力和幼苗存活率可为在森林中建立小种子植物奠定基础。
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来源期刊
Polish Journal of Ecology
Polish Journal of Ecology 环境科学-生态学
CiteScore
1.10
自引率
0.00%
发文量
9
审稿时长
18-36 weeks
期刊介绍: POLISH JOURNAL OF ECOLOGY (formerly Ekologia polska) publishes original scientific research papers dealing with all aspects of ecology: both fundamental and applied, physiological ecology, evolutionary ecology, ecology of population, community, ecosystem, landscape as well as global ecology. There is no bias regarding taxons, ecosystems or geographical regions.
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