海南岛腔轮科种类组成与区系分布

Species diversity and distribution of Lecanidae on Hainan Island,China

为系统分析海南岛腔轮虫的种类组成及其地理分布特征,我们于2010年11月、2011年5月和8月用35μm孔径的浮游动物网采集了海南岛134个水体的腔轮虫样品。采集的水体类型包括水库、河流、池塘、小溪、水稻田和小型临时水体。共检出腔轮虫42种和1个亚种。其中,中国新记录种9种,即马氏腔轮虫(Lecane margalefi)、唐纳腔轮虫(L.donneri)、优美腔轮虫(L.elegans)、坤杜里腔轮虫(L.kunthuleensis)、侧生腔轮虫(L.lateralis)、暗小腔轮虫(L.pusilla)、褶皱腔轮虫(L.rhytida)、柔弱腔轮虫(L.subtilis)和波纹腔轮虫(L.undulata);东洋界新记录种4种,即尖爪腔轮虫(L.cornuta)、玫瑰腔轮虫(L.rugosa)、柔弱腔轮虫和马氏腔轮虫;东洋界特有种1种:坤杜里腔轮虫。囊形腔轮虫(L.bulla)、尖角腔轮虫(L.hamata)、尾片腔轮虫(L.leontina)、月形腔轮虫(L.luna)、新月腔轮虫(L.lunaris)、凹顶腔轮虫(L.papuana)、梨形腔轮虫(L.pyriformis)和四齿腔轮虫(L.quadridentata)最为常见。海南岛腔轮虫呈现高的多样性,并主要由广生性种类、泛热带种类、全热带种类和一些间断分布种类和东洋界特有种类组成。种类多样性高于我国华南地区,但低于同处东洋界的泰国;海南岛与泰国的种类组成的Jaccard和S?rensen相似性系数(0.44和0.61)均高于与华南地区的相似性系数(0.20和0.46)。没有特有种发现。

We sampled 134 localities on Hainan Island and investigated rotifer fauna from 2010 to 2011, which to analyze the species composition and geographical distribution. The water types include reservoir, river, pond, brook, rice field and temporary pond. Forty-two species and one subspecies of the genera Lecane were identified. Lecane margalefi, L. donneri, L. elegans, L. kunthuleensis, L. lateralis, L. pusilla, L. rhytida, L. subtilis and L. undulata were identified as new to China, and L. cornuta, L. rugosa, L. subtilis and L. mar- galefi were new to the Oriental Zone. Lecane bulla, L. hamata, L. leontina, L. luna, L. lunaris, L. papuana, L. pyriformis and L. quadridentata were the most common species in this genus. The diversity of Lecane was high on Hainan Island, which was composed of cosmopolitan taxa, tropicopolitan taxa, pantropical taxa, dis- junctive distributed taxa and one endemic Lecane in the Oriental Zone： L. kunthuleensis. Diversity of Lecane was much higher on Hainan Island than in southern China, but lower than Thailand. The composition of Lecane was more similar to Thailand than to southern China.