Because complex species interactions may be involved, identifying a keystone species by removing the species and observing changes in the ecosystem is problematic.
由于其中可能涉及复杂的物种相互作用，通过移除一个关键物种并观察生态系统的变化来确定该物种是有问题的。
The complex interplay of species in symbiotic relationships highlights an important point about communities: Their structure depends on a web of diverse connections among organisms.
物种在共生关系中复杂的相互作用突出了群落的一个重要特点：它们的结构取决于生物之间多样的联系网络。
Support for this idea came from the observation that long-lasting climax communities usually have more complex food webs and more species diversity than pioneer communities.
支持这一观点的是，长期存在的顶极群落通常比先锋群落有更复杂的食物网和更多的物种多样性。
The authors say it's one of the most complex and rapid patterns of cultural evolution across a region ever observed in a nonhuman species.
作者认为，这是迄今为止在非人类物种领域发现的最复杂、最快捷的跨区域文化演变模式。
Moreover, the more a species prefers the forest, the more irregular the pattern it sports, and the more complex. (Size and direction have no effect.) Even among forest-dwellers there are differences.
并且，如果一个物种越是喜欢丛林生活，图案就越是不规则，越加复杂（对大小和图案生长位置没有影响）。
The natural world is vastly complex web of competing interests with no allegiance to any species or philosophy.
自然世界是一个各种利益互相竞争的巨大而复杂的网络，它并不忠于任何一个物种或思想。
In order to answer that question, Lewison is studying the complex interactions between fishers, Marine species, and the ocean landscape.
为了解决这个问题，刘易森正着手研究鱼类、海洋生物和海洋环境之间复杂的关系。
These ancient fish may have been among the earliest animals to evolve more complex, camera-like eyes as opposed to the strictly photosensitive vision possessed by more primitive species.
与更原始的物种相比，他们照相机似地眼睛已经已经不仅仅只具有光敏视觉了，或许这种古老的鱼类是最早一批想要进化的更复杂的物种之一。
Laboratories also need to use a rapid and affordable method of species identification to differentiate between Mycobacterium tuberculosis complex and nontuberculous mycobacteria.
同时，实验室还需要快速而廉价的样本确认方法用以区分结核分枝杆菌复合菌群和非结核分枝杆菌。
Both species form complex societies, hunt cooperatively, solve sophisticated cognitive problems, live for decades and invest years in rearing their offspring.
两个物种都形成了复杂的社会体系，合作捕猎，解决复杂的认知问题，存活数十年之久并且花费很多年来抚养它们的孩子。
Gene network structures start to resemble the Linux call graph as species become more complex, according to Sergei Maslov, a Brookhaven National Laboratory systems biologist not involved in the study.
根据布鲁克海文国家实验室系统生物学家、并未参与该研究的谢尔盖·马斯洛夫的说法，基因网络结构随着物种趋于复杂益发类似于Linux调用图。
This is a healthy, robust species that sits near the top of the complex Antarctic food web.
这个健康、强大的物种位于复杂的南极食物链的顶端。
In our cover story, "Twilight of the Neandertals," staff writer Kate Wong relates the subtle and complex factors that may have caused the species' ultimate collapse.
在我们的封面故事“尼安德特人的黎明”中，工作人员即作家KateWong讲到了可能造成该物种最终崩溃的微妙和复杂的因素。
Using complex statistics, Worm and colleagues used the number of genera, families, and so on to predict Earth's number of unknown species, and their calculations gave them a number: 8.7 million.
通过运用复杂的统计数据，沃姆（Worm）和同事们用属、科等的数量预测出地球上未知生物的数量，计算结果为：870万。
Such a complex association between creatures of four species has the hallmark of an ecologic happy family.
四种动物之间这种复杂的结合是生态学幸福家庭的标志。
But boron also exhibits rapid and significant phloem mobility in species for which sorbitol, mannitol, or dulcitol are the primary photosynthates since these polyols can effectively complex boron.
而对于以山梨醇、甘露醇、半乳糖醇等多元醇为光合作用初级运输物的植物中，硼可以与多元醇形成络合物而在韧皮部中自由运输。
Hence, this method provides useful informations for identification of plant species and verification of new species. It is a development for application of GC in sample analysis of complex components.
因此，本文认为该法可以为植物品种的鉴定以及为新种的确立提供有益的信息，并为GC在分析复杂组分的样品方面开拓了新的应用。
Those species with the most elaborate plumage also have the most diverse and reliable diet: a variety of insects, and fruits rich in complex nutrients.
那些拥有绚丽羽毛的种类总是吃那些多样及可靠的食物：各种昆虫及拥有复合营养的水果。
The method has also been confirmed for the rapid identification of genetically modified species, is expected to replace the existing complex gene detection method.
该方法还被证实可用于快速鉴定转基因物种，有望代替现有的复杂的基因检测方法。
We argue that the species aggregate ( or species complex) concept should better be adopted when identifying some plants documented in ancient Chinese literature .
我们认为在确定中国古籍文献中记载植物的学名时， 对部分植物宜采用集合种（或复合种） 的概念。
That is how a 34-year-old female Asian elephant in the Bronx Zoo showed researchers that pachyderms can recognize themselves in a mirror - complex behaviour observed in only a few other species.
这就是布朗克斯动物园中34岁的亚洲雌象“快乐”向研究者们展示厚皮类动物能在镜子中认出自己的方式。这种复杂行为仅在少数几个物种身上能观察到。
Nitrite Therapy After Cardiac Arrest Reduces Reactive Oxygen Species Generation, Improves Cardiac and Neurological Function, and Enhances Survival via Reversible Inhibition of Mitochondrial Complex I.
心脏骤停后使用亚硝酸盐治疗能够减少活性氧生成、改善心脏和神经功能并且通过对线粒体复合物i的可逆性阻滞提高生存率。
The new findings also suggest that birds have had a complex evolutionary history after an early explosion of species.
这些新的发现也暗示了，鸟类在最初的物种大爆发后有着一段复杂的进化历程。
The effects of exotic plants on soil properties are complex. The effects of one same species are different at different environment.
植物外来种对土壤特性的影响是十分复杂的，在不同的环境里同一植物外来种可产生不同的影响。
The research aims to try and investigate more complex co-evolution between species, where two different animals evolve complimentary behaviours.
这项调查意在尝试调查种群间更复杂的协同进化关系——那种两种动物进化出互惠互利的举动。
As a kind of complicated rotational flow with chemical reaction, fire whirl has complex dynamical behaviors under different conditions of fuel species, physical parameters, and environmental flow.
作为一种复杂的包含化学反应的有旋流动，火旋风在不同的可燃物种类和物理条件，以及不同的环境流场条件下，会表现出复杂的动力学特征。
The smell is intense to mature red fruits, cherries and plums altogether with species aromas as well as leather that make the wine an elegant and complex element.
香气浓郁，带有成熟水果，小浆果、李子以及皮革的品种香气，使得这款酒的香气优雅而馥郁。
Guizhou species richness and the complex and diverse fauna, making Guizhou has a unique sub-tropical vegetation in the nature, which accounts rich occurrence of epiphyllous liverworts in this region.
贵州物种的丰富性和区系的复杂多样，使得贵州植被具有独特的亚热带性质，并在这样的气候条件下孕育了丰富的叶附生苔种类。
Within this ectoparasite complex, 17 species have previously been reported to be vectors of human disease agents.
其中17种以前已经被证明是人类疾病的主要媒介。
Within this ectoparasite complex, 17 species have previously been reported to be vectors of human disease agents.
其中17种以前已经被证明是人类疾病的主要媒介。
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