查询词典 zoobenthos

The main results are given as follows: Up to now,West Lake is eutrophic based on physical and chemical factors and zoobenthos after ecological treatment engineering; The ecological engeering has a little effect on zoobenthos community strcture, and most of zoobenthos belong to eutrophic species and mollusca species was absent,surprisedly, two exotic species Nephthys oligobranchia and Limnoperna sp.

研究中主要的成果为：不论是理化指标还是底栖动物指标显示，实施生态治理工程后西湖仍属于富营养化湖泊，西湖属于V类甚至劣V类水体。

Based the structure and function of Yangtze River Estuary Ecosystem, the energy expenditure of shorebird community staging at Yangtze River Estuary and the production of macro zoobenthos community were studied in this dissertation.

本文以长江河口湿地生态系统的结构和功能为基础，对鸻鹬群落在长江口地区中途停歇期间的能量需求和栖息地选择和利用进行了研究，探讨了底栖动物作为鸻鹬群落饵料的状况，并根据鸻鹬群落和底栖动物群落能量流动特点，构建了Stella计算模型，对鸻鹬群落中途停歇长江口期间所需要的栖息地面积进行了估算和探讨，以期为区域发展和鸻鹬栖息地保护提供依据。

In this paper, the species, amounts and distribution situation of phytoplankton, zooplankton and zoobenthos in Shenzhen Bay are studied.

对深圳湾浮游植物、浮游动物和底栖动物的种类、数量及分布现状进行了研究。

Major contents of this paper were: the community structure of zoobenthos, species diversity and production of zoobenthos and so on.

主要结果如下： 1、军山湖计有底栖动物37种，其中瓣鳃纲3科10种；腹足纲7科11种；多毛纲1种；寡毛纲6种；水生昆虫7种；其他2种。

Zoobenthos are also used as biological monitors of the environmental health of lakes and rivers. Theories and methods of the secondary production of zoobenthos were reviewed with emphasis on the calculation of secondary production, P/B coefficient and factors to affect secondary production. In addition, this paper also ...

本文综述了国外在底栖动物次级生产力研究中的理论和方法，重点阐述了底栖动物次级生产力的计算方法、P/B系数、生产量以及影响次级生产力的因素，并总结了目前该领域的一些新进展，以期为国内相关研究提供参考和借鉴。

The studies of relationship between zoobenthos and environmental factors were conducted in this paper,and how to protect and utilize zoobenthos has been suggested. zoobenthos ; environment factors ; effect ; protect and utilize

底栖动物的生长繁殖、种类组成和现存量在不同水体和区域间存在着明显的差异，环境因子对底栖动物的影响相当复杂，不仅因子众多，而且各个因子对底栖动物中不同类群的作用并不完全一致，因此对这方面进行研究具有重要的意义，以下从理化因子和生物因子对底栖动物影响来加以概述。1理化因子对底栖动物的影响1.1水质对

In order to study the impact of rice-duck farming ecosystem on zoobenthos biodiversity in paddy waters, surface soil samples taken from rice-duck farming ecosystem and conventional paddy fields were analyzed for zoobenthos biodiversity.

在水稻不同生育时期对稻鸭共作稻田和常规稻田的土壤取样，研究不同稻田生态系统水体底栖动物的生物多样性。

Through field observations and sampling, by referencing to other documents and information, with correlation analysis and principal component analysis as mathematical tools, we know that: the distribution of the number of birds has close relations with density of zoobenthos and ratio of water area, the correlation coefficient of the distribution and the two factors are 0.916 and 0.745, the density of zoobenthos is the most direct reflection; Vegetation types , the coverage and water level may have relations with the distribution of the kind of birds, normally, middle and large volume birds need high vegetation and high coverage as their habitats, and waterfowl like deep water as their habitats; Human activities have low impact on the the distribution of the number of birds, but the activities have relations with all the other environmental factors.

通过实地的观测、采样，并结合其他文献的资料，以相关分析和主成分分析作为数学工具，得知：鸟类的数量分布和底栖生物密度、水域面积比例有着密切关系，鸟类数量分布与两者的相关系数分别为0.916和0.745，其中，底栖生物密度是鸟类数量分布的最直接反映；植被类型、植被盖度和水位可能与鸟类的种类分布有一定关系，通常体积中、大型的鸟类需要较高的植被高度，来作为自己的栖息场所，水禽需要水位较深的区域作为自己的栖息场所；人为活动对鸟类数量分布的影响不大，但对所有自然环境因子都有一定影响。

A where enhanced some what through putting in two kinds of zoobenthos as Bellamya purificata and Misgurnus anguillicaudatus in plant cultivated channels of water purification system of hydroponic biofilter method compared with not putting in zoobenthos channel.

在水耕植物过滤法净水系统中的植物栽培廊道中，通过投放2种底栖动物螺蛳和泥鳅延长食物链后，TN、TP、TOC、Chl.a的去除效果均比未投放底栖动物的廊道有所提高。

Cage culture of the mandarin fish also decreased the dissolved oxygen concentrations, the species number and biomass of the zoobenthos around the cage area, but had no significant effects on the water temperature, pH, transparency, species composition of phytoplankton and zoobenthos, and the species composition and biomass of rotifers, cladecerans and copepods.

网箱养鳜同时减少了网箱周围的溶氧、底栖动物的种类数和生物量，但对水温、pH值、透明度、浮游植物种类、原生动物种类以及轮虫、枝角类和桡足类的种类和生物量影响较小。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。