摘要
于2016年5月对浙江省仙居国家公园进行藻类多样性调查时,发现了中国淡水硅藻的1个新记录种--偏肿内丝藻兴凯变种[Encyonema ventricosum var.hankensis(Skvortzov) Rodionova&Pomazkina]。该文采用光镜和扫描电镜对偏肿内丝藻兴凯变种浙江种群的形态特征进行了观察和描述,并将其与该种的其他地理种群及内丝藻属其他相似物种的形态特征进行比较,同时讨论了该物种的生境特征。结果表明:(1)偏肿内丝藻兴凯变种壳面均具明显背腹之分,背缘明显拱起,腹缘轻微波曲;端部呈头状至喙状。(2)偏肿内丝藻兴凯变种浙江地理种群在背部中央区域具一孤点,而其兴凯种群对孤点这一特征未有描述。(3)偏肿内丝藻兴凯变种在俄罗斯的兴凯湖和贝加尔湖等地有分布,该种在中国是首次报道。
During a survey of freshwater diatoms from Shibadukeng stream in the Xianju National Park, Zhejiang Province, China, a newly recorded diatom, Encyonema ventricosum var. hankensis(Skvortzov) Rodionova & Pomazkina was recorded. Based on the application of light microscope(LM) and scanning electron microscope(SEM), E. ventricosum var. hankensis was identified and described here in details. The morphological differences between Zhejiang population and two Russia populations and other similar Encyonema species were compared. In addition, the habitat characteristics of Encyonema ventricosum var. hankensis in Shibadukeng stream were supplied in our paper. The results show that:(1) E. ventricosum var. hankensis valves strongly dorsiventral, dorsal margin broadly arched, ventral margin moderately undulant, apices capitate, deflected to the ventral margins.(2) E. ventricosum var. hankensis Zhengjiang population has a stigma on the dorsal side of the center area, while the Lake Khanka population and Lake Baikal population are no recorded.(3) E. ventricosum var. hankensis is found in Lake Khanka and Lake Baikal, and this is the first report from the freshwater in China.
作者
王婷
鲍明艳
卢剑轲
王先云
王振方
张瑞雷
张玮
WANG Ting;BAO Mingyan;LU Jianke;WANG Xianyun;WANG Zhenfang;ZHANG Ruilei;ZHANG Wei(Centre for Research on Environmental Ecology and Fish Nutrient of the Ministry of Agriculture,Shanghai Ocean University,Shanghai 201306,China;Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources,Ministry of Education,Shanghai Ocean University,Shanghai 201306,China;National Demonstration Center for Experimental Fisheries Science Education,Shanghai Ocean University,Shanghai 201306,China;Nation Engineering Research Center of Urban Water Resources,Shanghai 200082,China)
出处
《西北植物学报》
CAS
CSCD
北大核心
2019年第10期1884-1891,共8页
Acta Botanica Boreali-Occidentalia Sinica
基金
中国博士后面上基金(2018M641982)
崇明世界级生态岛水生生物资源资产台帐的建立(19050501900)
关键词
内丝藻
新记录种
偏肿内丝藻兴凯变种
仙居国家公园
淡水硅藻
Encyonema
newly recorded species
Encyonema ventricosum var. hankensis
Xianju National Park
fresh water diatom
