Phenotypic plasticity to light and nutrient availability alters functional trait ranking across eight perennial grassland species
Phenotypic plasticity to light and nutrient availability alters functional trait ranking across eight perennial grassland species
复制标题
八个多年生草原物种对光和养分可用性的表型可塑性年龄功能性状排名
DOI：
10.1093/aobpla/plv029
复制
发表时间：
2015
期刊：
影响因子：
2.9
通讯作者：
Roscher C
中科院分区：
文献类型：
--
作者：
Siebenkäs A;Schumacher J;Roscher C
在比较植物生态学或基于特征的生态系统过程预测中，功能性状通常被用作物种特定的平均特征值，假设种间差异大于种内性状变异，并且基于特征的物种排序在不同环境中是一致的。尽管这一假设受到越来越多的挑战，但缺乏关于种内性状对不同环境条件的反应程度在多大程度上取决于所考虑的性状和所研究物种的特征来评估基于性状的物种排名的结果的知识。在一个普通的庭园试验中，我们研究了8种多年生草地植物的功能特性，这些植物被分成不同的功能群(杂草和草)，并且它们的内在生长高度(高和小)不同，在4个月的处理应用中，在不同的环境中跨越了三个养分有效性水平和三个光照有效性水平。杂草和杂草在地上和地下几乎所有的性状上都不同，而与生长身高有关的性状差异一般很小。表现出对资源可获得性的最强烈反应的性状类似于草和杂草，它们与分配和资源吸收有关。在许多地上性状中，不同功能类群(草类)和不同生长高度的物种(小个子和高个子种)的性状变异强度不同，但地下部分性状的变异程度较低。这些差异反应改变了许多地上部分性状的基于性状的物种排序，如比叶面积、组织氮和碳浓度以及地上部分分配(叶面积比和根冠比)，而基于性状的物种排序在地下部分更为一致。我们的研究表明，按功能性状进行物种分类是有效的，但基于特征的物种排序依赖于环境条件，从而限制了物种特定平均特征值在生态学研究中的适用性。
Functional traits are often used as species-specific mean trait values in comparative plant ecology or trait-based predictions of ecosystem processes, assuming that interspecific differences are greater than intraspecific trait variation and that trait-based ranking of species is consistent across environments. Although this assumption is increasingly challenged, there is a lack of knowledge regarding to what degree the extent of intraspecific trait variation in response to varying environmental conditions depends on the considered traits and the characteristics of the studied species to evaluate the consequences for trait-based species ranking. We studied functional traits of eight perennial grassland species classified into different functional groups (forbs vs. grasses) and varying in their inherent growth stature (tall vs. small) in a common garden experiment with different environments crossing three levels of nutrient availability and three levels of light availability over 4 months of treatment applications. Grasses and forbs differed in almost all above- and belowground traits, while trait differences related to growth stature were generally small. The traits showing the strongest responses to resource availability were similarly for grasses and forbs those associated with allocation and resource uptake. The strength of trait variation in response to varying resource availability differed among functional groups (grasses > forbs) and species of varying growth stature (small-statured > tall-statured species) in many aboveground traits, but only to a lower extent in belowground traits. These differential responses altered trait-based species ranking in many aboveground traits, such as specific leaf area, tissue nitrogen and carbon concentrations and above-belowground allocation (leaf area ratio and root : shoot ratio) at varying resource supply, while trait-based species ranking was more consistent in belowground traits. Our study shows that species grouping according to functional traits is valid, but trait-based species ranking depends on environmental conditions, thus limiting the applicability of species-specific mean trait values in ecological studies.
盆栽植物的性状测量是否能代表自然群落中的性状
影响因子：
2.7
作者：
K. Mokany;J. Ash
通讯作者：
J. Ash
DOI：
--
发表时间：
2015-10
期刊：
--
影响因子：
--
作者：
Douglas M. Bates;M. Maechler;Ben Bolker;Steven C. Walker
通讯作者：
Douglas M. Bates;M. Maechler;Ben Bolker;Steven C. Walker
对来自不同养分有效性生境的八种草种的生长和形态的比较研究。
影响因子：
5.2
作者：
W. Elberse;F. Berendse
通讯作者：
F. Berendse