The effects of temporal continuities of grasslands on the diversity and species composition of plants
The effects of temporal continuities of grasslands on the diversity and species composition of plants
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草原时间连续性对植物多样性和物种组成的影响
DOI：
10.1101/2020.04.21.050013
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
Tanaka Kenta
中科院分区：
文献类型：
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作者：
Taiki Inoue;Yuki Yaida A.;Yuki Uehara;Koki Katsuhara R.;Jun Kawai;Keiko Takashima;Atushi Ushimaru;Tanaka Kenta
半自然草原是生物多样性丰富的生态系统。然而，它们在世界范围内都有减少的报道，迫切需要确定高度保护的草地。近年来，越来越多的研究报道了过去的植被历史对当前生物群落的影响。为了评价草地的时间连续性是否促进了生物多样性，从而可以作为保护优先度的指标，我们研究了日本中部杉田高原旧草地（160 - 1000年）和新草地（毁林后52-70年）以及森林中的维管植物群落。植物种类以老草原最多，其次是新草原和森林。这种模式在依赖草原的原生物种和依赖草原的濒危物种的数量上更为明显，表明了旧草原作为这些物种的避难所的作用。新旧草地的物种组成存在差异。新草地的物种组成介于旧草地和森林之间，表明新草地的植物群落在毁林后保留了过去造林的影响超过52年。在旧草地中检测到11种指示物种，而在新草地中没有，表明旧草地植物群落的独特性。草地的时间连续性增加了植物多样性，可以作为优先保护草地的一个指标。
Semi-natural grasslands are ecosystems rich in biodiversity. However, their decline has been reported worldwide, and identification of grasslands with high conservation priority is urgently required. Recently, an increasing number of studies have reported that past vegetation history affects current biological communities. To evaluate whether the temporal continuity of grasslands promotes biodiversity, and thus can be an indicator of conservation priority, we studied vascular plant communities in old (160– 1000s years) and new (52–70 years after deforestation) grasslands, as well as in forests, of Sugadaira Highland in central Japan. The number of plant species was highest in old grasslands, followed by new grasslands and forests. This pattern was much clearer in the number of grassland-dependent native and grassland-dependent endangered species, indicating the role of old grasslands as refugia for those species. The species composition differed between old and new grasslands. New grasslands had species compositions in between those of old grasslands and forests, suggesting that the plant community in new grasslands retains the influence of past forestation for more than 52 years after deforestation. Eleven indicator species were detected in old grasslands, but none in new grasslands, suggesting the uniqueness of the plant community in old grasslands. We conclude that the temporal continuity of grasslands increases plant diversity and can be an indicator of grasslands with high conservation priority.