地衣的生长形态类别是否由连续的功能特征支持:保水能力和特定的铊质量?

Q2 Agricultural and Biological Sciences
S. Wan, C. Ellis
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引用次数: 9

摘要

群落生态学的研究重点已经从分类组成的描述转向基于物种“功能特征”的群落组合的理解。功能性状方法在维管植物中得到了很好的发展,利用影响生态适应性的连续表型特征的变异性,如比叶面积、组织氮浓度或种子质量,来解释群落结构。相比之下,对异千水隐生植物和真菌(如地衣)的群落组装研究仍然集中在广泛的分类特征上,如生长形式差异:果状、卵叶状或壳状。本研究考察了影响地衣生理和生态适应性的两个极具前景的连续表型测量的种内和种间变异性:持水能力(WHC)和特定菌体质量(STM)。比较了物种内和物种间,以及关键的大地衣生长形式(水藻、绿藻和藻青苔藓)内和物种间的WHC和STM值,询问这些广泛使用的类别是否能够充分区分连续变量(WHC和STM)。我们展示了大的种内和种间变异,不能令人满意地映射到生长形式类别,并在此基础上提出了未来使用地衣功能性状的建议和警告。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
ARE LICHEN GROWTH FORM CATEGORIES SUPPORTED BY CONTINUOUS FUNCTIONAL TRAITS: WATER-HOLDING CAPACITY AND SPECIFIC THALLUS MASS?
The focus of community ecology has shifted from the description of taxonomic composition towards an understanding of community assembly based on species’ ‘functional traits’. The functional trait approach is well developed for vascular plants, utilising variability of continuous phenotypic characters that affect ecological fitness, such as specific leaf area, tissue nitrogen concentration or seed mass, to explain community structure. In contrast, community assembly studies for poikilohydric cryptogamic plants and fungi, such as lichens, remain focused on broad categorical traits such as growth form difference: fruticose, foliose or crustose. This study examined intra- and interspecific variability for two highly promising continuous phenotypic measurements that affect lichen physiology and ecological fitness: water-holding capacity (WHC) and specific thallus mass (STM). Values for WHC and STM were compared within and among species, and within and among key macrolichen growth forms (fruticose and green-algal and cyanolichen foliose species), asking whether these widely used categories adequately differentiate the continuous variables (WHC and STM). We show large intra- and interspecific variability that does not map satisfactorily onto growth form categories, and on this basis provide recommendations and caveats in the future use of lichen functional traits.
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来源期刊
Edinburgh Journal of Botany
Edinburgh Journal of Botany Agricultural and Biological Sciences-Plant Science
自引率
0.00%
发文量
22
期刊介绍: Edinburgh Journal of Botany is an international journal of plant systematics covering related aspects of biodiversity, conservation science and phytogeography for plants and fungi. The journal is a particularly valued forum for research on South East and South West Asian, Sino-Himalayan and Brazilian biodiversity. The journal also publishes important work on European, Central American and African biodiversity and encourages submissions from throughout the world. Commissioned book reviews are also included. All papers are peer reviewed and an international editorial board provides a body of expertise to reflect the wide range of work published and the geographical spread of the journal’s authors and readers. Published on behalf of the Royal Botanic Garden Edinburgh
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