查询词典 biota

This, coupled with the use of limited marine biota data, may result in a higher-than-normal degree of uncertainty associated with the dietary exposure estimates and the overall marine mammal risk calculations.

这一点，再加上利用有限的海洋生物的数据，可能会导致高于正常程度的不确定性与食物暴露估计值和海洋哺乳动物的整体风险的计算结果。

The three-dimensional preservation of putative phosphatized animal microfossil's with cellular structures provides valuable insight into the origin and early evolution of metazoans. Here we report experimental and statistical inv estigations on the fossil abundance of the Weng' an Biota.

本文以贵州瓮福磷矿陡山沱组上磷矿段灰白色球粒状白云质磷块岩为研究对象，在总结瓮安生物群中不同生物化石的鉴别特征基础上，定量统计采自该层位的两组岩石样品的酸处理砂样中的所有化石。

The Lower/Upper Cretaceous boundary in Songliao Basin is,therefore,between the Quantou and Denglouku formations,instead of between the Quantou and Qingshankou formations.2.The dark mudstones and shales in the Member 1 of Qingshankou Formation are of high organic carbon and low diasteranes contents.Organic geochemical characters are illustrated by biomarkers of 28,30-bisnorhopane and gammacerane,and positive excursion of kerogen isotopes.It is suggested that the dark mudstones and shales in the Member 1 of Qingshankou Formation are the products of lake anoxic period.It corresponds to the oceanic anoxic event at Cenomanian-Turonian boundary in Cretaceous.3.Based on the study of biostratigraphy,chronostratigraphy,magnetostratigraphy and event stratigraphy,a correlation of the lacustrine sequence to marine standard has been proposed,i.e.,the Quantou Formation corresponds to Cenomanian stage,Qingshankou Formation correlates to Later Cenomanian-Early Turonian,Yaojia Formation to Later Turonian-Coniacian,Nenjiang Formation to Santonian-Campanian.Sifangtai and Minshui Formations to Maastrichtian. 4.Analysis of lithology,lithofacies and microfossils of Cretaceous in Songliao Basin, shows that shore and shallow lake facies yield the most abundant microfossil groups,and the predelta and deltaic distributary plain facies rich in fossils as well.In the shore and shallow lake areas during the high level periods(such as Qingshankou and Nenjiang sedimentary periods),the lacustrine biota are of high diversity and high abundance.

因此，松辽盆地上、下白垩统的界线应在泉头组的底界，即泉头组与登娄库组之间，而不是泉头组的顶界。2、青山口组一段黑色泥岩、页岩具有有机碳含量高、重排甾烷含量低，生物标志物出现28，30—双降藿烷和伽马蜡烷，干酷根碳同位素具有正向偏移等有机地球化学特征，表征为青山口组一段黑色页岩、油页岩是古湖泊缺氧事件的产物，它对应于白垩纪古海洋Cenomanian—Turonian期界线附近缺氧事件，二者具同步性。3、通过生物地层学、年代地层学、磁性地层学和事件地层学研究，认为泉头阶大体相当于Cenomanian阶，青山口阶相当于晚Cenomanian—早Turonian阶，姚家阶对应于晚Turonian—Coniacian阶，嫩江阶对应于Santonian—Campanian阶，四方台阶和明水阶相当于Maastrichtian阶。4、通过对松辽盆地上白垩统的岩性、岩相及微体化石分析，认为滨浅湖相是微体生物群最为发育的相带，其次为三角洲前缘相和三角洲分流平原相。

The lowest addition of mercury so far, 0.1μg/L Hg, was used in CEEs for the study of mercury flux, speciation and budget since it was much closer to the marine environment and at the noneffective level on the biota of lower trophic levels in CEEs.

在海洋围隔生态系实验中加入迄今最低浓度的无机汞，以研究汞的迁移通量、形态分布和收支。

The terrestrial expansion of an extensive, simple land biota indicated by the isotope data may thus have been a critical step in the transition from the Precambrian to the Phanerozoic world.

大量简单陆地生物的暴发显示同位素数据也同步发生着改变，这种改变从前寒武纪开始并且延续到显生宙的世界。

However the polar cold water biota can be recognized either by a uniformitarian approach or by a palepbiogeographic approach.

但是极区冷水生物群除了藉助於「均变说」外，亦可利用重建古生物地理之方法来确认。

In the ecological water use,it include two aspects:azonal landscape water use and water used by the aquatic biota and riverine vegetation.

在实验研究中，利用试验结果，探索了植物的生态用水规律，并建立了其与常规气象因子的多元回归方程。

According to the ecologic and sedimentary features, the Late Permian biota and strata of south Guizhou can be grouped into the "shallow platform type"and "sub byssal aulacogen type".

根据生态环境和沉积环境的差异，黔南晚二叠世生物群和地层可分出两种类型：&浅海台地型&和&次深海裂陷槽型&，后者为深水型。

Microbial community biota monitoring-PFU was used to investigate the miniature biological population- Ciliata , as the main research object in the aeration tank in Yan'erwan Wastewater Treatment Plant in Lanzhou.

在兰州雁儿湾污水处理厂采用微型生物群落监测方法——PFU法，以曝气池微型生物种群——纤毛虫类为研究对象，通过PFU监测及同期BOD5检测，发现污水处理厂曝气池纤毛虫物种丰富，以钟虫等固着缘毛目类为优势类群。

Is found to have a close relationship with the living Delesseria according to detailed morphological study between the fossil and modern Delesseria. These new findings show that the Chengjiang Biota is high in species diversity of fossil algae and might offer new evidence for a better understanding of the Cambrian explosive biological evolution and its paleoenvironment.

Nov。。通过比较形态学研究，探讨了该宏观化石藻类的分类归属与亲缘关系，进一步丰富了澄江生物群生物物种多样性的认识，并为研究早寒武世生物演化及其古环境提供了新的化石证据。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。