Suites of plant traits in species from different stages of a Mediterranean secondary succession
Suites of plant traits in species from different stages of a Mediterranean secondary succession
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DOI：
10.1111/j.1438-8677.2009.00208.x
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发表时间：
2010-01-01
期刊：
影响因子：
3.9
通讯作者：
Garnier, E.
中科院分区：
文献类型：
--
作者：
Navas, M. -L.;Roumet, C.;Garnier, E.
本研究的目的是检测套件的性状有关的整个植物和种子形态，物候和资源利用-包括水-在不同的物种演替状态。20个性状进行了测量，在地中海南部法国，包括8个有关物候和5个水经济的5个演替阶段的55种代表。成套的性状改变沿着继承协议的收购/保护权衡完成了物候的持续变化。早期演替的物种有一个高比叶面积的叶，生产和失去了整个生长季节不断。后期演替的物种更高，寿命长，高三角洲13 C叶在短时间内，他们中的大多数坚持在夏季，并产生大的种子需要一个长的成熟期。更换发生的物种与干旱生存的策略的变化：早期演替的物种逃脱干旱死亡前的夏天，后来草本植物物种保持有利的水分状况在夏季落叶;后期演替的树木与一个大的机构允许访问一个大的资源池，产生密集的叶子，可以容忍干燥。这些变化发生伴随着企业社会责任战略的转变，利用与资源利用，植物大小和开花物候特征：杂草草本植物取代了更耐胁迫的草本植物和灌木整个继承，有竞争力的树木占主导地位的最新演替阶段。这些结果表明，在自然界中发现的功能变异的广度是不能预测的CSR框架，并要求一个更综合的观点，整个工厂的运作。
The aim of this study was to detect suites of traits related to whole plant and seed morphology, phenology and resource use - including water - in species differing in successional status. Twenty traits were measured on 55 species representative of 5 successional stages in Mediterranean southern France, including eight pertaining to phenology and five to water economy. Suites of traits that changed along succession in agreement with the acquisition/conservation trade-off were completed by continuous changes in phenology. Early successional species had leaves with a high specific leaf area that were produced and lost continuously through the growing season. Late-successional species were taller with long-lived, high delta 13C leaves produced during short periods, most of them persisting during summer, and produced large seeds requiring a long ripening period. Replacement of species occurred with change in strategies of drought survival: early successional species escaped drought by dying before summer; later herbaceous species maintained favourable water status in relation to leaf shedding during summer; late successional trees with a large body allowing access to a large pool of resources, produced dense leaves that could tolerate desiccation. These changes occurred concomitantly with a shift in CSR strategies, using traits related to resource use, plant size and flowering phenology: ruderal herbs were replaced by more stress-tolerant herbs and shrubs throughout the succession, with competitive trees dominating the latest successional stage. These results suggest that the breadth of functional variability found in natura is not predicted by the CSR framework, and calls for a more integrated view of whole plant functioning.