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首页> 外文期刊>Functional Ecology >Co-variations in litter decomposition, leaf traits and plant growth in species from a Mediterranean old-field succession
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Co-variations in litter decomposition, leaf traits and plant growth in species from a Mediterranean old-field succession

机译：地中海老场演替物种的凋落物分解，叶片性状和植物生长的共变

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A growing consensus is developing that the impact of species on ecosystem properties is mediated, at least partially, by the traits of their component species. A previous study demonstrated that the field decomposition of complex litters produced by different communities of a Mediterranean successional sere was related to the average trait value of these communities. Here we scale down to the species level, to test whether similar relationships are found for selected species from these communities. We also test whether litter decomposability can be considered as part of the suite of traits characterizing the fast-slow growth continuum in plants. 2. We chose 12 of the most abundant herbaceous species characteristics of three stages of the old-field succession mentioned above. We investigated trait variation and covariation for the eight following traits: specific leaf area (SLA), leaf phosphorus (LPC), nitrogen (LNC) and carbon (LCC) concentrations, leaf dry matter content (LDMC) and leaf total phenols (TPh), all on material collected in the field; and litter decomposability (Kpot) and maximum relative growth rate (RGRmax), obtained under standardized conditions in the laboratory. 3. Five of these traits were significantly lower in species from theadvanced successional stage. These trends were similar when comparisons were conducted either with the 12 species, or on a subset incorporating taxonomic information. LDMC was the single trait best correlated with species RGRmax and Kpot; the two lattertraits were also significantly correlated with one another. 4. These results provide clear evidence of functional links between plant growth, leaf traits and litter decomposability. LDMC appears as a pivotal trait of living leaves related to their structural properties. It influences the quality of the litter produced, and hence species' potential 'after-life effects' on ecosystem properties.
机译：人们日益达成共识，即物种对生态系统特性的影响至少部分地由其组成物种的特性来介导。先前的研究表明，地中海演替的不同群落产生的复杂凋落物的野外分解与这些群落的平均性状价值有关。在这里，我们按比例缩小到物种级别，以测试是否从这些群落中选择的物种找到相似的关系。我们还测试了凋落物可分解性是否可以被视为表征植物快速-缓慢生长连续体的一系列特征的一部分。 2.我们选择了上述旧田地演替的三个阶段中最丰富的草本物种特征中的12个。我们调查了以下八个性状的性状变异和协变：比叶面积（SLA），叶磷（LPC），氮（LNC）和碳（LCC）浓度，叶干物质含量（LDMC）和叶总酚（TPh） ，全部关于在实地收集的材料;在实验室标准条件下获得的凋落物可分解性（Kpot）和最大相对增长率（RGRmax）。 3.这些性状中的五个在高级演替阶段的物种中明显较低。当与12个物种进行比较时，或在结合了分类学信息的子集上进行比较时，这些趋势相似。 LDMC是与RGRmax和Kpot物种最相关的单一性状。这两个特征之间也存在显着的相关性。 4.这些结果清楚地证明了植物生长，叶片性状和凋落物可分解性之间的功能联系。 LDMC似乎是活叶与其结构特性相关的关键特征。它影响所产垃圾的质量，从而影响物种对生态系统特性的潜在“来世影响”。

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