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首页> 外文期刊>Tropical Conservation Science >Interspecific and Intraspecific Variation in Functional Traits of Subtropical Evergreen and Deciduous Broadleaved Mixed Forests in Karst Topography, Guilin, Southwest China
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Interspecific and Intraspecific Variation in Functional Traits of Subtropical Evergreen and Deciduous Broadleaved Mixed Forests in Karst Topography, Guilin, Southwest China

机译：桂林喀斯特地貌上亚热带常绿和落叶阔叶混交林功能性状的种间和种内变异

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Interspecific variation in plant functional traits is the basis of species coexistence in natural ecosystems. However, intraspecific variation is extremely important to community assemblage as well. Here, we quantify leaf trait variation within and across 32 dominant shrub species within two different leaf forms (16 evergreen species and 16 deciduous species) in subtropical evergreen and deciduous broadleaf mixed forest in the Karst topography of Guilin, southwest China. Results showed that leaf area (LA) and leaf thickness (LT) of evergreen species were significantly lower than those of deciduous species, whereas specific leaf areas (SLA) and leaf dry matter content (LDMC) showed the opposite pattern. For SLA and LA, the majority variance was found among species (50.82% vs. 65.01%) and little was found within species (22.98% vs. 27.89%), whereas the largest variation was within species (44.87% vs. 48.2%) with little among species (40.73% vs. 43%) for LDMC and LT. The large variability of LDMC and LT within species may reflect niche differentiation and the importance of intraspecific variation on species coexistence. Our results will help design conservation strategies for this unique subtropical evergreen-deciduous broadleaved forest ecosystem.
机译：植物功能性状的种间变异是自然生态系统中物种共存的基础。但是，种内变异对于群落的聚集也极为重要。在这里，我们量化了桂林喀斯特地貌的亚热带常绿和落叶阔叶混交林中两种不同叶型（16种常绿物种和16种落叶物种）内的32种优势灌木物种内部及其间的叶片性状变化。结果表明，常绿树种的叶面积（LA）和叶厚（LT）明显低于落叶树种，而比叶面积（SLA）和叶干物质含量（LDMC）则呈现相反的格局。对于SLA和LA，物种间的差异最大（50.82％对65.01％），物种内的差异很小（22.98％对27.89％），而物种间的差异最大（44.87％对48.2％）。 LDMC和LT的物种很少（40.73％比43％）。物种内部LDMC和LT的大变异性可能反映了生态位分化和种内变异对物种共存的重要性。我们的结果将有助于为这种独特的亚热带常绿落叶阔叶森林生态系统设计保护策略。

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