对人类种群起源和分布的研究曾是基于考古和化石证据。
Study of the origins and distribution of human populations used to be based on archaeological and fossil evidence.
谁不想加入名为“松鼠计划”(为松鼠观测募捐)或者“寻找丢失的瓢虫”(了解瓢虫种群的分布)的行动呢？
Who wouldn't want to join a mission called "Project squirrel" - inviting you to contribute squirrel observations, or "The Lost ladybug Project" - to understand ladybug species distribution.
研究人员发现了大约1000个种群，而且从个体到个体间分布一致；原来人们的鼻子里、背上都住的房客都大同小异。
The researchers found about 1000 species total, which were fairly consistent from person to person; it turns out we all have similar tenants in our noses and on our backs.
它们的数量仍然巨大，而且它们的超级种群在一个地区仍然分布广泛。
Their numbers are too large, and their supercolony spans too broad of an area.
有些地方动物种群是水平分布的，比如在索尔兹伯里平原，这块冰碛沉积三角洲密集分布着王企鹅、软毛海豹、象海豹和黑背海鸥。
Sometimes the animal multitudes are horizontal, as on Salisbury Plain, a glacial outwash delta densely colonized by king penguins, fur and elephant seals, and kelp gulls.
这个种群被认为是呈垂直地带分布的，也就是说，它们的分布和山区环境相关，但不限于此。
it is found associated to, but not restricted to, mountain environments.It is possible that they migrate altitudinally with season.
对东昌湖轮虫群落结构、种群分布和丰度进行了初步研究。
The community structure and population distribution of rotifera in Dongchang Lake was studied.
本研究采用计盒维数刻画了延龄草不同生境下的种群空间分布格局。
This study depicts the population space distribution under different living circumstances using Box counting dimension.
本研究利用生物监测方法，探明了京杭运河徐州段大型底栖无脊椎动物的生物种群及其分布。
The biolocial population and distribution of benthic macro-invertebrates in Xuzhou region of Jinghang Great Canal have been ascertained bybioassay method.
讨论了一类具终端观测且与年龄相关的非线性时变种群扩散系统的最优分布控制问题。
In this paper, the optimal distributed control problems for a class of age-dependent non-linear population diffusion system with final state observation are studied.
种群分布格局总体上呈聚集型，随年龄增加聚集强度增加。
The population pattern was of clustered distribution, with the aggregating intensity increased with age.
我们利用三阶抽样法，查清了东北地区猞猁种群的分布及数量情况。
The distribution and quantity of Felis lynx population in the northeast have been found out by the three-stage sampling method.
采用何种方法进行种群分布格局的分析研究一直是一个争论性问题。
Following conclusions were obtained from comparison of various methods used in spruce population spatial distribution pattern on sandy sites.
对福建省建阳市书坊乡贵溪村的天然檫树种群结构和空间分布格局进行研究。
The population structure and spatial distribution patten of Sassafras tzumu have been studied in this paper.
分株种群集聚分布格局的规模、强度和纹理在水平空间上与放牧强度的变化表现出一致性的关系。
There were identical changes between seale, intensity, grain of ramet population distribution pattern and the stocking intensity in horizontal space.
讨论了一类时变种群扩散系统的最优分布控制问题，利用J。
This paper discusses the optimal distributed control problem for time-varying population system with spatial diffusion. By J.
地理信息系统的应用，不但提高了格局分析的效率，也可以直观地反映种群的分布格局。
The results indicate GIS can not only improve the efficiency of pattern analysis but also visually display the distribution pattern.
分析了梭梭种群的径级结构、高度结构、密度和空间分布格局变化等。
The diameter structure, the height structure, the density and the distribution pattern were worked out.
比较了不同方法对厦门海区潮间带游动放线菌的分离效果和分析游动放线菌在不同材料中的种群数量分布。
The isolation methods for the actinoplanetes are compared and the ecological distribution of the actinoplanetes in the intertidal zone of Xiamen sea area is studied.
目的掌握苏州市城区室内蜚蠊种群及其分布，为城市蜚蠊防制提供依据。
Objective to investigate the populations and the distribution of the indoor cockroaches in Suzhou urban districts, and to offer the data for controlling these pest insects.
休眠孢子的形成对于赤潮藻种群的保存、延续以及分布扩散等均具有重要的意义。
The formation of resting spores plays an important role in population succession, conservation, distribution and dispersal of red tide-causing alga.
近几十年来，由于栖息地受到严重破坏，以及滥捕猎杀等原因，黑麂野生种群的分布范围和数量逐渐缩小。
In the last several decades, due to destruction of habitat and hunting pressure, the distribution range and population size of this muntjac have been continued declining.
种群格局信息维数能够刻划格局强度的尺度变化程度，揭示出种群个体分布的非均匀性状况。
The information dimension of population patterns quantifies the scale variation degree of pattern intensity, and discloses the unevenness of individual distribution.
介绍了鸢尾科植物的种群分布，各个品种的生长特征，观赏特性以及它们在园林绿化、水土保持中的应用。
It introduces the distribution of iridaceous plants, the growing feature of every variety, and the seeing and enjoying specific.
在自然种群中，个体往往分布不连续，从而形成或多或少的聚居点，相邻或邻近的聚居点之间有一定的个体交流。
In natural populations, individuals often are distributed more or less discontinuously to form numerous colonies, and individuals may be exchanged between adjacent or nearby colonies.
棘头虫种群在宿主不同体长组的分布类型为聚集分布，且聚集强度随棘头虫的种群平均丰度增加而增加。
The over-dispersion of the acanthocephalan population in host different body length groups was found, and the degree of the aggregation increases with the increases of mean abundance.
由于长期缺乏有效的科学调查，目前对其分布、种群及动态、行为、猎物现状等基础信息不清。
The basic ecological data of the leopard, such as the distribution, population and it's dynamic, behavior, prey, is least known for lacking of a long-term study.
从斑块信息的角度分析了四川冶勒的红豆杉种群分布格局与坡度的关系。
The distribution pattern of Taxus chinensis distributed in Yele, Sichuan Province is closely related to the slope patches of their habitation.
这与种群的叶面积分布特征密切相关。
This is closely related to the distribution of leaf area of population.
种群的垂直空间分布格局呈随机型或集群型。
The distribution of a species individuals in the vertical space is random or contagious.
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