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首页> 外文期刊>Scientific reports. >Strong positively diversity–productivity relationships in the natural sub-alpine meadow communities across time are up to superior performers
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Strong positively diversity–productivity relationships in the natural sub-alpine meadow communities across time are up to superior performers

机译：跨时间的自然亚高山草甸社区中的强大积极多样性 - 生产力关系取决于优越的表演者

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In experiments that test plant diversity–productivity relationships, the common practice of weeding unsown species and disallowing species colonization may have the unintended consequence of favoring priority effects that maintain niche complementarity in determining productivity. However, in naturally assembled communities where colonization occurs, resource competition may favor dominant traits, which eventually have the greatest influence on productivity. Here, in naturally developed long-term subalpine meadows (from 4-year to at least 40?years meadows) in the Qinghai-Tibetan Plateau, we investigated the relationships between species richness and productivity to testify whether positive diversity–productivity relationships can still exist in naturally developed long-term communities. We also measured five functional traits (specific leaf area, photosynthesis rate, leaf proline content, seed mass and seed germination rate) to calculate two functional diversity indices: community-weighted mean trait values (CWM) and Rao’s quadratic entropy (RaoQ) which are highly correlated to functional traits of dominating species and variety of functional trait among all species. Finally, we quantified the relative contribution of species diversity, functional traits of dominating species and functional diversity among all species to productivity along the succession. We demonstrated strong positively diversity–productivity relationships in the natural sub-alpine meadow communities across time. The five traits of dominating species explained a large proportion (54–80%) of the variation in productivity during succession, whereas species diversity and functional diversity (FD) for each of the five traits explained much less (24–48% for species richness and 0–40% for FD for each of the five traits respectively). We found unequivocal evidence that significantly positive diversity–productivity relationships in the natural sub-alpine meadow communities across time are up to superior performers (dominant traits) in naturally developed communities where colonization occurs. As a result, understanding diversity–productivity relationships under the full range of community assembly processes therefore merits further investigation.
机译：在测试植物多样性 - 生产率关系的实验中，杂草未经遗产和禁止物种殖民化的常见做法可能具有有意义的优先效应，使得维持利基互补性在确定生产力方面的效果。然而，在发生殖民化的自然组装的社区中，资源竞争可能有利于主导特征，这最终对生产力产生了最大的影响。在这里，在青藏高原的自然开发的长期亚高级草甸（从4年到至少40年），我们调查了物种丰富性和生产力之间的关系，以证明潜积 - 生产力关系是否仍然存在在自然开发的长期社区。我们还测量了五种功能性状（特异性叶面积，光合速率，叶脯氨酸含量，种子质量和种子萌发率）来计算两个功能分析指数：社区加权平均特征价值（CWM）和RAO的二次熵（RAOQ）与所有物种中的主导物种和各种功能性状的功能性状高度相关。最后，我们量化了物种多样性的相对贡献，在所有物种中，所有物种之间的功能性状和功能多样性沿着继承的生产力。我们展示了跨时间的自然亚高山草甸社区的强烈肯定的多样性生产力关系。主导物种的五种特征在继承期间解释了生产率的大部分（54-80％），而五种特征的物种多样性和功能多样性（FD）解释得多（物种丰富的物种24-48％）对于5个特征中的每一个的FD分别为0-40％）。我们发现明确的证据表明，在当时，天然次高山草甸社区中的天然次高山草甸社区的积极多样性 - 生产力关系在自然开发的社区中发生了优越的表演者（显性性状）。因此，了解全系列社区装配过程下的多样性 - 生产力关系，因此进一步调查。

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