生物地理学

MacArthur and Wilson's theory of island biogeography states that the number of species found on an island is determined by a dynamic equilibrium between the immigration of new colonizing species and the extinction of previously established ones.

麦克阿瑟和威尔逊的岛屿生物地理学理论指出，岛屿上物种的数目是由新移殖来的物种和以前存在物种的灭绝之间的动态平衡决定的。

The development of earthworm ecology was constrained by the complex feature of soil, the scarce knowledge of natural history and biogeography of earthworms, and the low efficiency of approaches in field manipulation of earthworm community.

土壤本身的复杂性，蚯蚓自然历史和生物地理学知识的缺乏，野外控制蚯蚓群落方法的滞后等都限制了蚯蚓生态学的发展。

The research scopes include plant taxonomy, floristics and biogeography, the origins and phylogenies of higher plants, population biology and conservation genetics, Evo-Devo and evolutionary genomics.

主要研究内容包括：植物分类、区系和生物地理学，植物大类群的起源和系统发育重建，居群生物学和保护遗传学，进化发育生物学和进化基因组学等。

The mission of the center is to discover and transmit knowledge in basic plant biology, especially in plant taxonomy, floristics, biogeography, phylogeny, population biology and evolution, conservation biology, evolutionary genomics, and Evo-Devo.

该中心主要研究方向为：植物分类-区系-生物地理学、植物的起源和系统发育、居群生物学和保护遗传学、进化发育生物学和进化基因组学等。

Speculating on the origin of Gaultheria, two different hypotheses were suggested, one of Gondwanan origin, and the other of Laurasian origin.

本文概述了近年来白珠树属的分子系统学和生物地理学研究进展，并对该属尚存的一些问题进行了讨论。

Speculating on the origin of Gaultheria, two different hypotheses were suggested, one of Gondwanan origin, and the other of Laurasian origin In the present paper, recent advances in molecular phylogenetics and biogeography of Gaultheria are summarized and some problematical issues within the genus discussed.

关於白珠树属的起源问题存在两种不同的推测：一种观点认为该属起源於南半球的冈瓦纳古陆；另一种观点则认为其起源於北半球的劳亚古大陆。本文概述了近年来白珠树属的分子系统学和生物地理学研究进展，并对该属尚存的一些问题进行了讨论。

SeamountsOnline is a NSF-funded project designed to gather information on species found in seamount habitats, and to provide a freely-available online resource for searching, downloading, mapping, and analyzing patterns of biogeography in these data.

"海山生物学信息数据库"是美国国家科学基金会资助建立的，收集了海山生境中的大量物种信息，并且可以在线检索和下载，利用这些数据可以进行生物地理学分析或制图。

Results There are 23 species,4 genera of the subfamily in Qinghai-Xizang Plateau.

目的 对我国青藏高原圆蝇亚科昆虫进行生物地理学方面的调查。

Resolving the higher-level relationships among ostariophysan and related fishes will aid in resolving basal teleostean divergence and provide basis to historical biogeographic analysis of major freshwater fish groups.

解决骨鳔鱼类及其相关类群的高阶系统发育关系有助于解决基部真骨鱼的分化，而且为主要的淡水类群——世界性分布的耳鳔系鱼类的历史生物地理学分析奠定基础。

The site also provides biogeographic evidence of the evolution of the island.

这个保护区也提供了这个岛进化的生物地理学证据。

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。