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Individualistic responses of forest herb traits to environmental change.
Plant Biology ( IF 4.2 ) Pub Date : 2020-02-28 , DOI: 10.1111/plb.13103 H Blondeel 1 , M P Perring 1, 2 , E De Lombaerde 1 , L Depauw 1 , D Landuyt 1 , S Govaert 1 , S L Maes 1 , P Vangansbeke 1 , P De Frenne 1 , K Verheyen 1
中文翻译：
森林草本性状对环境变化的个体化反应。
更新日期：2020-02-28
Plant Biology ( IF 4.2 ) Pub Date : 2020-02-28 , DOI: 10.1111/plb.13103 H Blondeel 1 , M P Perring 1, 2 , E De Lombaerde 1 , L Depauw 1 , D Landuyt 1 , S Govaert 1 , S L Maes 1 , P Vangansbeke 1 , P De Frenne 1 , K Verheyen 1
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- Intraspecific trait variation (ITV; i.e. variability in mean and/or distribution of plant attribute values within species) can occur in response to multiple drivers. Environmental change and land‐use legacies could directly alter trait values within species but could also affect them indirectly through changes in vegetation cover. Increasing variability in environmental conditions could lead to more ITV, but responses might differ among species. Disentangling these drivers on ITV is necessary to accurately predict plant community responses to global change.
- We planted herb communities into forest soils with and without a recent history of agriculture. Soils were collected across temperate European regions, while the 15 selected herb species had different colonizing abilities and affinities to forest habitat. These mesocosms (384) were exposed to two‐level full‐factorial treatments of warming, nitrogen addition and illumination. We measured plant height and specific leaf area (SLA).
- For the majority of species, mean plant height increased as vegetation cover increased in response to light addition, warming and agricultural legacy. The coefficient of variation (CV) for height was larger in fast‐colonizing species. Mean SLA for vernal species increased with warming, while light addition generally decreased mean SLA for shade‐tolerant species. Interactions between treatments were not important predictors.
- Environmental change treatments influenced ITV, either via increasing vegetation cover or by affecting trait values directly. Species’ ITV was individualistic, i.e. species responded to different single resource and condition manipulations that benefited their growth in the short term. These individual responses could be important for altered community organization after a prolonged period.
中文翻译：
森林草本性状对环境变化的个体化反应。
- 种内性状变异（ITV；即物种内植物属性值的均值和/或分布的变异）可响应多种驱动因素而发生。环境变化和土地利用的遗留力可能直接改变物种内的性状价值，但也可能通过植被覆盖的变化而间接影响它们。环境条件中可变性的增加可能导致更多的ITV，但是不同物种之间的反应可能有所不同。要准确预测植物群落对全球变化的反应，有必要在ITV上解开这些驱动因素。
- 我们将有药草群落种植到有或没有近代农业史的森林土壤中。在欧洲温带地区收集了土壤，而选定的15种草本植物具有不同的定植能力和对森林栖息地的亲和力。这些中观世界（384）经历了变暖，氮添加和光照的二级全要素处理。我们测量了植物高度和比叶面积（SLA）。
- 对于大多数物种，随着光的增加，变暖和农业遗产的增加，平均植被高度随着植被覆盖的增加而增加。在快速定殖物种中，高度的变异系数（CV）较大。春季物种的平均SLA随着变暖而增加，而光添加通常会降低耐荫物种的SLA。治疗之间的相互作用不是重要的预测指标。
- 环境变化处理通过增加植被覆盖率或直接影响特征值来影响ITV 。物种的ITV是个人主义的，即物种对不同的单一资源和条件操纵做出了响应，这在短期内有利于其生长。这些个人的回应对于延长社区的组织结构可能很重要。
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