群落

According to the investigation on the local situation of aquatic vegetation in Littoral Regions of Gonghu Lake and Meiliang Bay of the Wuxi Taihu Lake, the species of aquatic vegetation, community forms and biomass were acquired. Then a contrast of vegetation distribution characteristic between the two Littoral Regions was analyzed which induced to the analysis of impact factors. In the treatments designed as varying degree oxidation intimidate, the heavy metal cadmium and the ammonia nitrogen single and compound poisons, the COD sewage cultivate, the plant growth opsonin processes, the effect of the intimidate environment on the submerged plant growth and the physiological biochemistry characteristic was analyzed. The effective method to improve the resist adversity of submerged macrophyte was discussed. The results will give a suggestion to the restoration of the submerged macrophyte, the efficiency and reconstruction in Lake Ecosystem.

通过对无锡太湖两重要湖湾贡湖和梅梁湖湖滨带沿岸浅水区水生植被现状进行调查，了解了水生植物的种类、群落组成及生物量，对两湖湾湖滨带沿岸浅水区水生植被分布特征进行了对比，并进行了影响因素分析；通过不同程度的氧化胁迫、重金属镉与氨态氮单一和复合作用、高COD生活污水胁迫培养、植物生长调节素处理，分析胁迫环境和壳聚糖各自对沉水植物生长的影响及作用机理，探讨提高沉水植物逆境抗性的有效措施；探寻沉水植物修复的理论依据和有效途径，为急待进行水生植被恢复的湖泊提供依据和建议。

The statistical methods of classification and ordination allow community boundaries to be superimposed on this continuum.

分类和排序的统计方法允许群落的边界在这个连续体上重叠。

While addressing topics in community and ecosystem dynamics, evolution of sex and mating systems, organismal adaptation, and genetic aspects of evolution.

同时在群落，生态系统动力学，性和交配体系的进化，生物适应性，进化遗传学方面选择主题。

The edge effect of orthopteran communities were studied among three types of edge zones in this region.

本文还选定吴起最为常见和主要的三种边缘地带，分析了直翅目昆虫群落在边缘处的多样性变化、边缘效应强度和种群的边缘反应类型。

On the whole, the orthopteran communitiesdiversity in edge zone are higher than those in the interior of adjacent communities at the similar edges.

分析各边缘地带蝗虫群落多样性发现，所有边缘类型的边缘处直翅目昆虫多样性明显高于其相邻的生态系统。

The results of PCA analyzing the vegetation factors and orthopteran communities are ideal, the cumulative percent of two principal components reach respectively 95.299% and86.304%.

对各生境植被因素和直翅目昆虫群落所进行的主成分分析，结果理想，两维主成分的累计方差贡献率分别达到了95.299％和86.304％。

Therefore,the low stability of community was principally caused by chemical control and oversimplification of ecological environment.

因此，化学农药和生态环境是造成茶园昆虫、蜘蛛群落结构差异的主要因素。

The results showed that there are almost the same species composition in the overstory as in the understory at current stage, and the species composition would not be change on large scale in short-term time without a big disturbance.

结果显示，现阶段林分上层与下层群落几乎有共同的物种组成，若无大型干扰下，短期内物种组成不致产生明显改变。

The results showed that the diurnal changes of photosynthesis of S. chinensis in tile overstory took on "double-peak" curve with remarkable midday depression. The midday depression was mainly due to non-stomata1 limitations. On the contrary, the diurnal changes of photosynthesis of S. chinensis in the understory took on "one-peak" curve with low Pn. The maximal Pn was only half of that of S. chinensis in the overstory. The correlation analysis showed that the limiting factor for this low Pn might be light intensity (p=0.001). Compared with its accompanying plants, S. chinensis was in a disadvantaged status in the community with low photosynthetic capacity, water use efficiency, and the ratio of photosynthetic rate to respiration rate.

结果表明：夏蜡梅冠层的光合速率日进程呈"双峰"曲线，有明显的"午休"现象，经分析其"午休"的原因主要是由非气孔因素引起的；林下夏蜡梅则表现为"单峰"曲线，净光合速率较低，最大净光合速率不及冠层的1/2，相关分析结果表明其最重要的影响因子是光合有效辐射(p=0.001)；与其它伴生植物相比，夏蜡梅的日均光合速率、最大光合速率、水分利用效率和光合速率／呼吸速率都明显偏低，在群落竞争中处于不利地位。

The photosynthetic parameters of Sinocalycanthus chinensis in both overstory and understory, including the diurnal changes of net photosynthetic rate, intercellular CO2 concentration, dark respiration rate and stomatal resistance, were measured using a LCA4 Portable Photosynthesis System. The photosynthetic parameters of the accompanying plants such as Boehmeria platanifolia, Rhus chinensis and Weigela japonica var.

用LCA4型便携式全自动光合测定仪，在自然条件下，于7月下旬的晴朗天气测定了群落冠层和林下两种不同光环境下夏蜡梅的净光合速率、胞间CO2浓度、呼吸速率、气孔阻力的日进程，并与其伴生植物悬铃叶苎麻、盐肤木、水马桑Weigela japonica var。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。