For trees ( DBH> 2.5), species diversity and evenness indices increased from 1982 to 1994 in all the three forests.

1、

D and H ′ of species diversity indexes of identical layer are different, but it has basically the same tendency in different growth stages of Sophora davidii community. Species diversity indexes of shrub layer increase with increasing time.

同一层次的物种多样性指数D和H′虽然数值不同，但在不同阶段狼牙刺群落有基本一致的趋势，灌木层物种多样性指数基本上随恢复时间的增加而增加；

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2、

Study on the relationship between soil fertility properties and species diversity in grass layer showed that the main factor affecting species diversity was soil PH, then was the soil total phosphorus.

对防护林草本层物种多样性指数与土壤肥力因子的关系研究表明：影响草本层物种多样性的主要因子是土壤PH值，其次是土壤全磷含量。

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3、

While in winter, 56 species of 34,707 birds was observed in the same area, the density was 118.32 ind.

冬季越冬期56种，共34707只，密度为118.32只／ha。冬季鸟类群落的物种多样性和结构稳定性大于春季。

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4、

Dartmoor has 1,000 or so ponies, who play a critical role in creating the diversity of species in this area.

达特穆尔大约有1000匹马驹，它们为该地区的物种多样性作出了极大的贡献。

高考真题- 2015 湖北阅读A

5、

The mainly investigated contents were as follows: ( 1) Species diversity analysis: Species richness, Brillouin index of species diversity and even degree.

主要研究内容包括：①植物物种多样性：不同植被群落的物种丰富度（S）、多样性指数（H）和均匀度（J）；

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6、

In order to study the effects of enclosure on species diversity of degraded upland meadow, C.

为研究封育对不同退化山地草甸物种多样性的影响，以C。

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7、

For elevated temperature service, which material should he applied to support element or welded attachment.

对于高温工况, 哪种材料可用作管道支撑元件或焊接附件?

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8、

The elevated temperature strength and creep property of alloys can be improved by the Sr addition.

锶合金化可以改善镁合金的高温力学性能以及蠕变性能.

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9、

Deformation behavior at elevated temperature of AZ 31 B magnesium alloy was studied systematically by processing map theory.

采用加工图理论系统AZ31B镁合金在高温变形过程中的变形行为.

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10、

Secondly, the influence of solidification shrinkage was considered by increasing thermal expansion coefficients of elevated temperature.

其次, 通过加大材料的线膨胀系数,考虑了凝固收缩对熔池尾部应力应变场的影响,最终得到了各种条件下的焊接应力-应变场.

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11、

Newly developed fire resistant steels improve their elevated-temperature strength, thus reducing fire-resistant coating.

耐火钢提高了钢的高温强度, 从而减少了防火涂层.

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12、

A new method ( layer-by-layer rebound method ) is presented residual strength of concrete exposed to elevated temperature.

提出了逐层回弹法检测火灾后混凝土强度的方法.

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13、

The kinetic behaviour of the structural relaxation at temperature and the transformation elevated temperature was discussed.

考查了低温结构弛豫和高温转变的动力学行为.

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14、

Applications requiring strength at elevated temperature, e . g . engineering hardware, brake component.

用于在高温下需要保持强度的铸件, 如工程配件, 刹车组件.

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15、

AFLP Analysis on Genetic Diversity of Casuarina Equisetifolia Germplasm Resources

短枝木麻黄种质资源遗传多样性的AFLP分析

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16、

Genetic Diversity of Secale Based on RAMP Markers

应用RAMP标记研究黑麦属遗传多样性

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17、

Analysis of genetic diversity and affinity relationships among 13 species of Dendrobium Sw. by RAPD

利用RAPD分析13种石斛属植物的遗传多样性和亲缘关系

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18、

The genetic diversity of 238 cultivated rice and its difference between landraces and modern cultivars have been assayed using a multiple copy microsatellite DNA marker.

用一个多拷贝微卫星DNA标记分析了238份栽培水稻的遗传多样性及遗传多样性从农家品种到现代栽培品种的动态变化。

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19、

RAPD and ISSR Analysis of Genetic Diversity and Genetic Relationships of Tobacco

烟草遗传多样性与亲缘关系的RAPD和ISSR分析

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20、

Genetic diversity of D genome in 19 Aegilops species revealed by SSR Markers

利用SSR标记分析19份山羊草属种D基因组遗传多样性

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