Angiosperm diversity in a Lowland Semideciduous Seasonal Forest in Pernambuco State, Brazil

Abstract: Angiosperm species growing in a fragment of Lowland Semideciduous Seasonal Forest in the Tapacurá Ecological Station (TES) in Pernambuco State (Brazil) were surveyed. Botanical collections to compose a species list were undertaken and these species identified by comparisons with specimens deposited in the HST, PEUFR and IPA herbaria, in addition to online database queries. A total of 479 species were identified, belonging to 81 families and 285 genera. The families with the largest numbers of species were Fabaceae (68), Rubiaceae (25), Malvaceae (20), Myrtaceae (20), Cyperaceae (19), Poaceae (19), Bromeliaceae (18), Euphorbiaceae (17), Asteraceae (16), and Sapindaceae (14), which together accounted for 49.27% of the total number of species. Great similarity was observed between our results and surveys of other lowland forests in northeastern Brazil, with the families Fabaceae, Rubiaceae, and Myrtaceae having the greatest species richness. This study added 44 new occurrences for Pernambuco State, demonstrating the richness and abundance of TES taxa and the importance of their conservation to the regional flora.

摘要：针对巴西伯南布哥州塔帕库拉生态站（Tapacurá Ecological Station, TES）内一片低地半落叶季节性森林片段中的被子植物（Angiosperm）物种开展了调查。研究通过采集植物标本以构建物种名录，并对照存放于HST、PEUFR及IPA标本馆的馆藏标本，结合在线数据库查询完成物种鉴定。本研究共鉴定出479种植物，隶属于81科285属。物种数量位居前列的科依次为豆科（Fabaceae，68种）、茜草科（Rubiaceae，25种）、锦葵科（Malvaceae，20种）、桃金娘科（Myrtaceae，20种）、莎草科（Cyperaceae，19种）、禾本科（Poaceae，19种）、凤梨科（Bromeliaceae，18种）、大戟科（Euphorbiaceae，17种）、菊科（Asteraceae，16种）以及无患子科（Sapindaceae，14种），上述类群合计占总物种数的49.27%。本研究结果与巴西东北部其他低地森林的调查结果具有高度相似性，其中豆科、茜草科和桃金娘科的物种丰富度最高。本研究为伯南布哥州新增了44个物种分布记录，彰显了塔帕库拉生态站的物种丰富度与类群丰度，以及其对区域植物区系保护的重要价值。