standing adj. 1.直立的;站着的。 2.【林业】未伐的。 3.【农业】尚未收割的。 4.停伫的;停滞的,不再运转的,不流动的。 5.持续的,长期有效的,标准的,不退的(颜色)。 6.常备的,常设的。 7.【印刷】已排好的。 8.有垫脚的,有脚的(杯子等)。 9.(由法律习惯)确立的,永久的。 a standing tree 立木。 a standing factory 停工的工厂。 a standing order 长期订单。 a standing committee 常务委员会。 n. 1.起立,站立;站立处。 2.持续时间,存在时间。 3.立场;地位,身分。 social standing社会地位。 a man of high standing 身分高的人。 an illness of long standing 长期疾病。 be in good standing身分相当好。
Standing crop the total weight of all the living organisms present in an ecosystem at a given moment , usually expressed as dry weight per unit area 现存量:某一给定时刻,生态系统中所有活的有机体的总重量。通常的表述是单位区域的干重。
4 . the community structure and standing crops of periphyton in chinese reservoir were first reported . thirty - five genra of periphytic algae were collected using hanging plastic slices 8 .青梢帕culter由bryi鳞片的年轮从4月份开始形成,大部分年轮形成时间在7月。
For the relationships between zoobenthos and environmental factors , results showed that zoobenthic standing crops were positively correlated with submersed aquatic macrophytes , total phosphorus and total nitrogen contents but were negatively correlated with depths and secchi disk transparencies 环境分析表明底栖动物总的现存量与水草生物量、总磷总氮含量均正相关,与水深、透明度均负相关。
There were few reports about zoobenthic functional feeding groups in china so far , a detailed study of functional feeding groups species numbers , species percentages and standing crops in four lakes was done . results showed that functional feeding groups in the four lakes had their own characteristics . shredder percentage was highest in longgan lake than other three lakes 结果表明各个湖泊中功能摄食类群各有其特点,撕食者的比例以龙感湖最高,收集者的比例以黄湖最高,刮食者的比例以牛山湖最高,捕食者的比例以东汤孙湖最高。
To examine the effects of different lake uses on lacustrine zoobenthic community , zoobenthos were sampled in 1998 - 1999 from four shallow lakes of middle and lower basins of changjiang river , viz . fish stocking and touring lake , east tangsun lake ; fish - stocking - lake , niushan lake ; natural - fishing - lake , longgan lake and crab - overstocking - lake , huang lake . species composition , standing crops , functional feeding groups of benthic animals in every lake were studied 1998年4月1999年7月对长江中下游四个浅水湖泊即东汤孙湖、牛山湖、龙感湖和黄湖的底栖动物分别进行了四次采集,研究各个湖泊底栖动物在种类组成、现存量、功能摄食类群、生产显和渔产潜力上的差异;结合各个湖泊理化生物因子综合分析了湖泊不同利用方式对底栖动物群落的影响。