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引用本文:陈纯,李思嘉,胡韧,韩博平.四种浮游植物生物量计算方法的比较分析.湖泊科学,2013,25(6):927-935. DOI:10.18307/2013.0617
CHEN Chun,LI Sijia,HU Ren,HAN Boping.Comparative analysis of four methods for calculating biomass of phytoplankton community. J. Lake Sci.2013,25(6):927-935. DOI:10.18307/2013.0617
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四种浮游植物生物量计算方法的比较分析
陈纯1, 李思嘉1, 胡韧1,2, 韩博平1,2
1.暨南大学生态学系, 广州 510632;2.水体富营养化与赤潮防治广东普通高校重点实验室, 广州 510632
摘要:
浮游植物是水生生态系统中重要的初级生产者,其生物量是反映其现存量的关键指标.本文利用具有3个处理组的围隔实验中的浮游植物数据,对文献中常见的计算浮游植物种群生物量和群落生物量的4种方法:标准法、细分法、粗分法和资料法进行比较,并分析采用这4种不同方法得到的浮游植物生物量与叶绿素a浓度的相关性.结果表明:粗分法是计算浮游植物生物量的高效方法,能够保证准确度和节省时间;提高浮游植物生物量计算准确度不是影响浮游植物生物量与叶绿素a浓度相关性显著程度的关键.通过比较剔除稀有种(生物量不超过群落生物量5%的种类)前后浮游植物生物量的差异,发现忽略稀有种会导致种类均匀度较高的浮游植物群落生物量严重偏低,建议浮游植物生物量的计算不能一概忽略稀有种.
关键词:  浮游植物  生物量  计算方法  叶绿素a  稀有种
DOI:10.18307/2013.0617
分类号:
基金项目:广东省水利厅科技创新项目(2009-22);国家自然科学基金重点项目(U0733007)联合资助
Comparative analysis of four methods for calculating biomass of phytoplankton community
CHEN Chun1, LI Sijia1, HU Ren1,2, HAN Boping1,2
1.Department of Ecology, Jinan University, Guangzhou 510632, P. R. China;2.Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institutes, Guangzhou 510632, P. R. China
Abstract:
Phytoplankton is the main primary producer in pelagic water.The biomass of phytoplankton community represents phytoplankton standing stock in water where they are collected.However,the error of different methods for calculating the community biomass is unclear.Based on a data set of phytoplankton from an enclosure experiment with three treatments covering a series of phytoplankton communities,we compared phytoplankton community biomass and phytoplankton species population biomass by four calculating methods which are widely applied in China,i.e.,standard method,fine-group method,coarse-group method and reference method,and then investigated the correlation between chlorophyll-a concentration and the phytoplankton biomass calculated by the four methods.The results showed that the coarse-group method is high-efficiency to calculate phytoplankton biomass and suggested to apply.The positive correlation between phytoplankton biomass and chlorophyll-a is not always significant and can not be largely promoted by improving calculation of phytoplankton biomass.We refer rare species to the species with a population less than 5% of community in biomass,and checked the effect of removal the rare species on the phytoplankton community biomass, and found that ignoring rare species resulted in a significant reduction of total phytoplankton biomass.Therefore,whether the rare species can be ignored depends on the structure of phytoplankton community.
Key words:  Phytoplankton  biomass  calculation method  chlorophyll-a  rare species
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