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Nature:在一起能够生长更好的植物

标签:植物群落
摘要 : 更加多样化的植物群落经常更稳定和更高产,这是一个会随时间推移而增强的效应。在这篇论文中,Debra Zuppinger-Dingley 等人对演化在这一生态现象中所起作用进行了研究。他们利用具有不同的最近演化历史、在混合物种群落中或单一栽培状态下生长的植物(包括禾草、草药和豆科植物)来建立新的生态群落。

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 更加多样化的植物群落经常更稳定和更高产,这是一个会随时间推移而增强的效应。在这篇论文中,Debra Zuppinger-Dingley 等人对演化在这一生态现象中所起作用进行了研究。他们利用具有不同的最近演化历史、在混合物种群落中或单一栽培状态下生长的植物(包括禾草、草药和豆科植物)来建立新的生态群落。

生态系统功能和形态特征多样性在由混合生长的植物组成的群落中比在由单作生长的植物组成的群落中更大,说明自然群落中的生物多样性效应会随种群适应它们的生物环境而增强。关于小规模演化对生态关系有重要意义的发现,将关于自然群落中物种共存的不同观点统一了起来。

原文摘要:

Selection for niche differentiation in plant communities increases biodiversity effects

Debra Zuppinger-Dingley, Bernhard Schmid, Jana S. Petermann, Varuna Yadav, Gerlinde B. De Deyn & Dan F. B. Flynn

In experimental plant communities, relationships between biodiversity and ecosystem functioning have been found to strengthen over time1, 2, a fact often attributed to increased resource complementarity between species in mixtures3 and negative plant–soil feedbacks in monocultures4. Here we show that selection for niche differentiation between species can drive this increasing biodiversity effect. Growing 12 grassland species in test monocultures and mixtures, we found character displacement between species and increased biodiversity effects when plants had been selected over 8 years in species mixtures rather than in monocultures. When grown in mixtures, relative differences in height and specific leaf area between plant species selected in mixtures (mixture types) were greater than between species selected in monocultures (monoculture types). Furthermore, net biodiversity and complementarity effects1, 2 were greater in mixtures of mixture types than in mixtures of monoculture types. Our study demonstrates a novel mechanism for the increase in biodiversity effects: selection for increased niche differentiation through character displacement. Selection in diverse mixtures may therefore increase species coexistence and ecosystem functioning in natural communities and may also allow increased mixture yields in agriculture or forestry. However, loss of biodiversity and prolonged selection of crops in monoculture may compromise this potential for selection in the longer term.(doi: 10.1038/nature13869 & doi: 10.1038/nature13929

对应Nature杂志: 2014年11月06日Nature杂志精选

来源: Nature中文 浏览次数:213

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