From log interval 0 to log interval 9, the mite species number shows a gradual descending.
从0对数区间到第9对数区间，革螨种类数显示逐渐下降的趋势。
The difference of species number of protected birds occurred in different stages of vegetation succession.
植被演替不同阶段的保护鸟类物种数有差异。
The results showed that rotifer species number differed significantly in the five lakes with different eutrophication levels (P<0.01).
不同营养水平湖泊中出现的轮虫种类数有明显的差异（P<0.01）。
The macrofaunal species number, density and biomass have increased after banning the aquaculture activities in Xiamen Western bay in 2002.
2002年西海域禁止水产养殖后，宝珠屿附近海域大型底栖动物种数、密度和生物量有所增加。
The results indicated that the individual number of the community and its dominant, species number and sharing degree decreased as highness classes raised;
结果表明：丝栗栲群落及其优势种群个体数、群落物种数和种对级的分享度随高度级增加都呈下降趋势；
The result shows that there are obvious difference in the colonization rate, density and species number of AMF when the inocula are soil from the different plant community.
结果表明：用不同植物群落的土样作为接种物，三叶草菌根侵染率和根际AMF种类和密度有很大差异，但菌根真菌种类数目较多；
This often increases the number of individuals collected and attracts species that are otherwise elusive.
这通常会使收集到的个体数量增加，并吸引其他难以捕捉的物种。
If the population of these other species were increased, the number of ticks acquiring the bacterium and hence the number of people contracting Lyme disease would likely decline.
如果这些其他物种的种群数量增加，蜱类捕获细菌的数量就会减少，因此感染莱姆病的人数就会减少。
A number of scientists question the assumption that the presence of alien species can never be acceptable in a natural ecosystem.
一些科学家质疑这样的假设，即在自然生态系统中，外来物种的出现是绝对不会被接受的。
The aim is to reverse the decline in the number of tree species or at least to preserve the "genetic material" of all of them.
其目的是扭转树种数量下降的趋势，或至少保存所有树种的“遗传物质”。
This is very special and has a large number of endangered species, and as it's at the far corner of the Sea Life Centre, it often gets overlooked.
这是一个非常特殊的地方，有很多濒临灭绝的物种，而由于它位于海洋生物中心的偏远角落，所以经常被忽视。
In that study, each of eight different trilobite species was observed to undergo a gradual change in the number of segments.
在这项研究中，观察到八种不同的三叶虫，每一种都经历了身体节数的逐渐变化。
I am sure you're all aware of the worrying situation with a large number of species facing extinction.
我相信你们都意识到了大量物种面临灭绝这个令人担忧的情况。
An alarming number of Mediterranean monk seals, an endangered species, have recently died.
最近，濒临灭绝的地中海僧海豹出现了惊人数量的死亡。
The Amazon rain forest is home to the highest number of plant and animal species (种类) on Earth.
亚马逊雨林是地球上动植物种类最多的地方。
The population of this fish species has also declined, even though the annual number caught for human consumption has not increased.
尽管供人类食用的年捕鱼量没有增加，但这种鱼的数量也在下降。
The results suggested that obvious difference of chromosome number appeared among theseAlnus species.
本次研究结果表明桤木属物种间染色体数目有明显的差异。
By contrast, the number of newly discovered species continues to rise sharply.
相比之下，新发现的物种数量持续急剧增长。
The Mediterranean has the largest number of invasive species – most of them having migrated through the Suez Canal from the Red Sea.
地中海拥有最多数量的入侵物种——其中大多数通过苏伊士运河从红海迁移过来。
The study team used a method called linear regression to calculate the number of Earth's species.
该研究团队用以计算地球物种数量的是一种叫线性回归的方法。
Although the number of species on the planet might seem an obvious figure to know, a way to calculate it with confidence has been elusive.
尽管生存在地球上的物种数量，我们可以估计个大概，但是我们一直找不到可信的方法来计算。
Autumn is usually a good time for immigrant species, but it's the sheer number and diversity this year that's special.
秋季通常都是物种迁入的好时机，但特别的是今年在数量和种类上的陡然增长。
Margalef put it this way: "From empirical evidence it seems that species that interact freely with others do so with a great number of other species."
马格·列夫这样说：“从观察结果看，物种似乎是自由的和别的物种相互作用，物种数量巨大时也是这样。”
Until now, some scientists havethought that many individuals of the same species with certain talentscould perform specific tasks better than the same number of individualsfrom different species.
此前，有些科学家认为具有某种特质的同种生物个体比起数量相同、不同种的生物个体在某项任务中的表现更好。
Since 1993 the number of known mammal species has increased 10 percent.
自1993年来，已知的哺乳动物物种数增加了10%。
In those areas that have had three or four periods of experimental burning only half the number of species of tree seedlings originally found are still there.
在进行过三到四次燃烧实验的地区，原本发现的树苗种类只有半数仍然存在。
Fruit flies from the same species differ in the number of bristles on their bellies; stalk-eyed flies differ in the lengths of their eye stalks.
同一种类的果蝇腹部的刚毛数量不等，杆状眼蝇的杆状眼长度不等。
Fruit flies from the same species differ in the number of bristles on their bellies; stalk-eyed flies differ in the lengths of their eye stalks.
同一种类的果蝇腹部的刚毛数量不等，杆状眼蝇的杆状眼长度不等。
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