Is the herb-shrub composition of veredas (Brazilian palm swamps) distinguishable?
Is the herb-shrub composition of veredas (Brazilian palm swamps) distinguishable?
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DOI：
10.1590/0102-33062017abb0209
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发表时间：
2018-03-01
影响因子：
1.1
通讯作者：
Munhoz, Cássia Beatriz R.
中科院分区：
文献类型：
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作者：
Silva, Diogo Pereira da;Amaral, Aryanne G.;Munhoz, Cássia Beatriz R.
Vereda（巴西棕榈沼泽）是一种鲜为人知的稀树草原植物地貌，发生在草本-灌木植物区系丰富的潮湿土壤上。本研究的目的是记录Estacao ecserra Geral do Tocantins - EESGTO的veredas草本灌木种类，并将其与巴西其他veredas进行比较。此外，我们还评估了研究的veredas的草本灌木植物区系与其他稀树草原和草原的相似性，以评估veredas是否具有专属的植物区系。通过排序分析来了解这些地区的区系关系。在EESGTO共记录到49科105属213种，其中塞拉多州新记录5种，托坎廷斯州新记录78种。与其他样地的植物区系相似性较低。所有样地共记录到1324种植物，其中veredas特有物种342种，湿润草地（campos limpos umidos）特有物种187种。通过对数据库的分析，14.3%的物种仍然只存在于沼泽和湿润草原。排序分析表明，植物区系组成具有从湿型到干型的梯度。总之，我们认识到一个将veredas与其他塞拉多植物地貌区分开来的植物群。
Vereda (Brazilian palm swamp) is a poorly known savannic phytophysiognomy that occurs on moist soils with high herb-shrub floristic richness. This study aimed to document the herb-shrub species of veredas of the Estacao Ecologica Serra Geral do Tocantins - EESGTO, and compare this fl ora with other veredas in Brazil. Furthermore, we assessed the similarity of the herb-shrub flora of the studied veredas with that of inventories of other savannas and grasslands in order to evaluate whether veredas possess an exclusive fl ora. Ordination analysis was performed to understand the floristic relationship among these areas. We recorded 213 species, 105 genera and 49 families at EESGTO, including five new fl oral records for the Cerrado and 78 for the state of Tocantins. The floristic similarity among veredas at EESGTO and the other sites was low. For all sites, a total of 1,324 species were recorded, of which 342 were unique to veredas and 187 unique to moist grasslands (campos limpos umidos). After reviewing databases, 14.3 % of these species remained exclusive to veredas and moist grasslands. The ordination analysis indicated a gradient in floristic composition from wet to dry phytophysiognomies. In conclusion, we recognize a fl ora that distinguishes veredas from other Cerrado phytophysiognomies.