Bagella Simonetta
Dipartimento di Scienze della Natura e del Territorio and Nucleo di Ricerca sulla Desertificazione (NRD) University of Sassari, Via Piandanna 4, 07100 Sassari, Italy.
C R Biol. 2014 Apr;337(4):276-82. doi: 10.1016/j.crvi.2014.01.003. Epub 2014 Mar 6.
The objective of this study was to clarify the taxon surrogacy hypothesis relative to vascular plants and bryophytes. A literature review was conducted to obtain papers that met the following criteria: (i) they examined species richness values; or (ii) they evaluated the species richness within the same study sites, or under the same spatial variation conditions. Twenty-seven papers were accessed. The richness of the two taxa, compared in 32 cases, positively co-varied in about half of the comparisons. The response to the spatial variation in environmental or human-induced factors of the two taxa in terms of species richness was rather variable. Based on current knowledge, the main documented findings regard forest habitats and nival gradients. In forest habitats, co-variation in species richness is likely when similar environments are analysed and seems to be strengthened for boreal forests. Along the nival gradient, a different response in terms of richness of the two taxa suggests that vascular plants cannot be considered good surrogates for bryophytes.
本研究的目的是阐明与维管植物和苔藓植物相关的分类群替代假说。进行了文献综述以获取符合以下标准的论文：（i）研究了物种丰富度值；或（ii）在同一研究地点或相同空间变异条件下评估了物种丰富度。共查阅了27篇论文。在32个案例中对这两个分类群的丰富度进行了比较，约一半的比较中呈现出正协变关系。这两个分类群在物种丰富度方面对环境或人为因素空间变异的响应差异较大。基于目前的知识，主要的记录发现涉及森林栖息地和雪线梯度。在森林栖息地中，当分析相似环境时，物种丰富度可能会出现协变，并且对于北方森林来说这种协变似乎会增强。沿着雪线梯度，两个分类群在丰富度方面的不同响应表明维管植物不能被视为苔藓植物的良好替代物。
