The importance of hydraulic architecture to the distribution patterns of trees in a central Amazonian forest
The importance of hydraulic architecture to the distribution patterns of trees in a central Amazonian forest
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DOI：
10.1111/nph.14508
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发表时间：
2017-07-01
期刊：
影响因子：
9.4
通讯作者：
Oliveira, Rafael S.
中科院分区：
文献类型：
--
作者：
Cosme, Luiza H. M.;Schietti, Juliana;Oliveira, Rafael S.
物种分布和组合组成可能是通过环境过滤器进行性状选择的结果。在这里，我们问是否过滤的物种在当地的规模可以归因于他们的水力结构特征，揭示了水文微生境划分的基础上，在亚马逊河流域中部森林。（解剖性状，木材比重（WSG）），器官（叶面积，比叶面积（SLA），叶面积：边材面积比）和全株（高）水平，在高原，物种有较高的WSG，但较低的平均导管面积，平均导管水力直径，边材面积和SLA比在山谷中，性状通常与水力安全。平均导管水力直径和平均导管面积增加与高度的两个栖息地，但叶面积和叶面积：边材面积比投资与树高在山谷与高原物种下降。[2017年3月29日在线发布后添加的更正：前一句已重新措辞。效率或安全的两种策略进行检测，根据船舶大小或分配到saplight.In结论，对比水文条件作为环境过滤器，在当地规模的物种组成产生差异。这对未来气候变化情景下物种分布的预测具有重要意义。
Species distributions and assemblage composition may be the result of trait selection through environmental filters. Here, we ask whether filtering of species at the local scale could be attributed to their hydraulic architectural traits, revealing the basis of hydrological micro-habitat partitioning in a Central Amazonian forest.We analyzed the hydraulic characteristics at tissue (anatomical traits, wood specific gravity (WSG)), organ (leaf area, specific leaf area (SLA), leaf area : sapwood area ratio) and whole-plant (height) levels for 28 pairs of congeneric species from 14 genera restricted to either valleys or plateaus of a terra-firme forest in Central Amazonia.On plateaus, species had higher WSG, but lower mean vessel area, mean vessel hydraulic diameter, sapwood area and SLA than in valleys; traits commonly associated with hydraulic safety. Mean vessel hydraulic diameter and mean vessel area increased with height for both habitats, but leaf area and leaf area : sapwood area ratio investments with tree height declined in valley vs plateau species. [Correction added after online publication 29 March 2017: the preceding sentence has been reworded.] Two strategies for either efficiency or safety were detected, based on vessel size or allocation to sapwood.In conclusion, contrasting hydrological conditions act as environmental filters, generating differences in species composition at the local scale. This has important implications for the prediction of species distributions under future climate change scenarios.