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首页> 外文期刊>Ecological engineering: The Journal of Ecotechnology >The determinants of seed germination in an alpine/subalpine community on the Eastern Qinghai-Tibetan Plateau
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The determinants of seed germination in an alpine/subalpine community on the Eastern Qinghai-Tibetan Plateau

机译：青藏高原东方高山/亚马尔斯群落中种子萌发的决定因素

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摘要

Variation in germination behavior in combination with environmental variability is thought to play an important role in promoting species coexistence within communities. In this study, we attempt to examine the relative importance of species attributes (e.g. phylogeny, life history, seed size, dispersal) and abiotic factors (e.g. temperature, habitat, altitude) on germination of 202 common species from an alpine/subalpine meadow on the eastern Qinghai-Tibetan Plateau. Mean germination percentage (GP) and mean germination time (GT) differed significantly among phylogenetic, life history, temperature treatment and habitat groups. Both mean GT and GP of annuals were lower than those of perennials. The adhesion-dispersed seeds had the highest mean GP and ant-dispersed seeds had the lowest mean GT. Seeds dispersed early had higher mean GP than those dispersed late. Seeds from south slope had relatively higher mean GP and lower mean GT than those from other habitats. Our results also suggested that temperature rise was likely to be beneficial for both earlier germination and higher germination percentage in alpine/subalpine meadow. Contrary to the hypothesis, species with a wide geographic distribution did not germinate preferentially under more various germination conditions. We conclude that temperature and phylogeny appear to be the most important factors in regulating germination in alpine/subalpine meadow on the eastern Qinghai-Tibetan Plateau. (C) 2016 Elsevier B.V. All rights reserved.
机译：萌发行为与环境变异相结合的变化被认为在促进社区内的物种共存方面发挥着重要作用。在这项研究中，我们试图研究物种属性（例如文学，生命历史，种子大小，分散）和非生物因子（例如温度，栖息地，高度）对来自高山/亚高山草甸的202种常见物种的萌发（例如温度，栖息地，高度）的相对重要性青海东部高原。平均发芽率（GP）和平均发芽时间（GT）在系统发育，寿命，温度处理和栖息地组中显着不同。均均为GT和GP的年龄均低于多年生的GT。粘附分散的种子具有最高的平均GP和蚂蚁分散的种子具有最低的平均GT。分散早期的种子比分散的均线更高。来自南坡的种子相对较高，平均GP和低于其他栖息地的平均值。我们的研究结果还表明，在高山/亚高山草地上的早期发芽和更高的发芽率，温度升高可能是有益的。与假设相反，具有宽地理分布的物种在更加各种萌发条件下没有优先发芽。我们得出结论，温度和系统发育似乎是在青藏高原东方高山/亚马林草甸中调节萌发的最重要因素。 （c）2016年Elsevier B.v.保留所有权利。

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