生物量

Benthic mollusk was mainly distributed in lake bends, among which, Alocinma longicornis and Bellamya were dominant in density, while Corbicula fluminea and Bellamya were dominant in biomass.

软体动物主要分布在湖湾，在密度方面，长角涵螺和环棱螺占优势，在生物量方面，河蚬和环棱螺占优势。

Persistence of grazing mixed pasture has been a key issue in environment conservation and sustainable utilizing of resources in karst region. Under moderate grazing with Corriedale sheep, the productivity and botanical composition of Trifolium pratense mixtures were studied over a 20-year period in karst region of southwest China. Four mixtures consisted of Trifolium pr...

用考力代绵羊轮牧，在牧前和牧后草地现存量(干物质，DM，drymatter)分别为1800~2500(草层高15~18cm)和900~1200kg·hm-2(草层高3~5cm)的适度放牧利用条件下，对亚热带最常见的豆科牧草红三叶与禾本科牧草的两两混播草地的群落生产力和持久性开展长期研究。20年的结果表明：适度放牧利用下，群落地上总生物量长期稳定，各组合间差异不显著，总盖度20a后仍高达97%以上；适度放牧有利于牧草的生产力持久性，红三叶、鸭茅、多年生黑麦草和黑穗画眉草都在群落中长期存在；群落净产量和持久性是尺度依赖的，群落长期净生产力以红三叶+鸭茅的最高(DM产量353.3g·m-2·a-1)(P.05)，对杂草侵入的抵抗力最强，而前10a红三叶+多年生黑麦草有很高的净生产力DM产量449.8g·m-2·a。。。

Cryptomeria fortunei plantations ; biomass ; soil organic carbon ; carbon sink

人工柳杉林；生物量；土壤有机碳；碳汇

The Geo-RS model of biomass is not only considered the vegetation spectral ,but also the other relative information, the accuracy of this model is better than the cubic curve fitting, but workload is large and the model is complex .

生物量的遥感地学模型由于不仅仅考虑到了植被的光谱信息，也考虑到了其他的相关信息而反演精度高于三次拟合曲线，但是工作量大，建模复杂。

The type, amount and biomass of decomposer and its action in decomposing were also studied preliminarily in this paper.

对分解者的种类、数量、生物量及其在分解过程中的作用也进行了初步研究。

All defoliation treatments resulted in significant lower total biomass production than in the control clones. The pattern of leaf removal affected clone dry weight.

所有的去叶处理与对照组相比，导致了明显低的总生物量的产生，影响了无性系的干重。

A pot experiment was conducted to study the biomass allocation and morphological characteristics of Dichondra repens under different levels of shading (100%, 66%, 205%, and 9% transparency).

通过盆栽试验研究了透光率在100％、66％、20.5％和9％的4个光照梯度下，马蹄金的生物量分配及形态特征。

With principal component analysis of the specific relationships between small mammal community and habitat structure, dicotyledon biomass and horizonal structure heterogeneity of the vegetations were major factor to influence the distributions and community structures of small mammals.

小哺乳动物群落与栖息地关系的PCA分析表明，植被的双子叶植物生物量和植被水平结构异质性是影响小哺乳动物分布和群落结构的主要因素。

BMac was found to be the important factor regulating diversity and standing crops of epiphytic gastropods. Accordingly, a series of predictive models were generated.

2确定沉水植物生物量是附草螺类多样性和现存量的重要调控因子，相应地构建了系列预测模型。

The phytoplankton diversity was restricted by environment factor such as water temperature, salinity, COD, biomass, species.

浮游植物多样性主要受水温、盐度、COD、生物量、物种数等环境因子的制约。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。