陕西蟹蛛科蜘蛛三新种记述

本文记述陕西秦岭山区蟹蛛科Ｔｈｏｍｉｓｉｄａｅ蜘蛛三新种：高寒花蟹蛛,新种Ｘｙｓｔｉｃｕｓ ａｌｓｕｓ ｓｐ．ｎｏｖ．,太白峭腹蛛,新种Ｔｍａｒｕｓ ｔａｉｂａｉｅｎｓｉｓ ｓｐ．ｎｏｖ．,秦岭峭腹蛛,新种Ｔｍａｒｕｓ ｑｉｎｌｉｎｇｅｎｓｉｓ ｓｐ．ｎｏｖ,。     

中国蟹蛛科（蜘蛛目）新种记述

记述我国蟹蛛科花蟹蛛属６新种和蟹蛛属２新种,共计８新种,金林花蟹蛛Ｘｙｓｔｉｃｕｓｊｉｎｌｉｎ,玛纳斯花蟹蛛Ｘ．ｍａｎａｓ,林芝花蟹蛛Ｘ．ｎｙｉｎｇｃｈｉｅｎｓｉｓ,拟斑花蟹蛛Ｘ．ｐａｒａｐｕｎｃｔａｔｕｓ,似旋花蟹蛛Ｘ．ｔｏｒｓｉｖｏｉｄｅｓ,吴氏花蟹蛛Ｘ．ｗｕａｅ,广西蟹蛛Ｔｈｏｍｉｓｕｓｇｕａｎｇｘｉｃｕｓ和胡氏蟹蛛Ｔ．ｈｕｉ。     

我国南方近捕鸟蛛属一新种(蜘蛛目:捕鸟蛛科)

记述了我国南方近捕鸟蛛属一新种,定各为广西近捕鸟蛛,新种Ｐｌｅｓｉｏｐｈｒｉｃｔｕｓ ｇｕａｎｇｘｉｅｎｓｉｓ ｓｐ．ｎｏｖ．。     

香港跳蛛记述

本文报道采自香港的蜘蛛目跳蛛科４新种及香港的１新记录种：铜头菱头蛛;香港菱头蛛,亲种Ｂｉａｎｏｒ ｈｏｎｇｋｏｎｇ ｓｐ．ｎｏｖ．;香港伊蛛,新种ｋｉｕｓ ｈｏｎｇｋｏｎｇｓｐ．ｎｏｖ．;香港兰纳蛛,新种Ｌａｎｇｏｎａ ｈｏｎｇｋｏｎｇ ｓｐ．ｎｏｖ．;香港盘蛛,新种Ｐａｎｃｏｒｉｕｓ ｈｏｎｇｋｏｎｇ ｓｐ．ｎｏｖ．。迄今香港已知蛛２４种。     

我国类石蛛科蜘蛛两新种：蜘蛛目：类石蛛科

本文记述产于云南省、湖南省和福建省类石蛛两新种：黑色垣蛛，新种Ａｒｉａｄｎａ ｐｅｌｉｏｓ ｓｐ．ｎｏｖ．；敏捷垣蛛，新种Ａｒｉａｄｎａ ｅｌａｐｈｒｏｓ ｓｐ．ｎｏｖ. 。     

中国拟态蛛属一新种记述：蜘蛛目：拟态蛛科

本文记述采自湖北的拟态蛛科拟态蛛属一新种,定名为中华拟态蛛Ｍｉｍｅｔｕｓ ｓｉｎｉｃｕｓ ｓｐ．ｎｏｖ．     

陕西蟹蛛科蜘蛛三新种记述──(蜘蛛目)

本文记述陕西秦岭山区蟹蛛科Ｔｈｏｎｄｓｉｄａｅ蜘蛛三新种：高寒花蟹蛛,新种Ｘｙｓｔｉｃｕｓａｌｓｕｓｓｐ．ｎｏｖ,太白峭腹蛛,新种Ｔｍａｒｕｓｔａｉｂａｉｅｎｓｉｓｓｐ．ｎｏｖ．,秦岭峭腹蛛,新种Ｔｍａｒｕｓｑｉｎｌｉｎｇｅｎｓｉｓｓｐ．ｎｏｖ．．     

我国南方巨蟹蛛一新种（蜘蛛目：巨蟹蛛科）

记述了我国南方巨蟹蛛属一新种,命名为大庸巨蟹蛛,新种Ｈｅｔｅｒｏｐｏｄａ ｄａｙｏｎｇ ｓｐ．ｎｏｖ．     

我国弱蛛属（蜘蛛目：弱蛛科）2新种记述

记述产于贵州茂兰自然保护区２种弱蛛,命名为镰形弱蛛,新种Ｌｅｐｔｏｎｅｔａ ｆａｌｃａｔａ ｓｐ．ｎｏｖ．和徐氏弱蛛Ｌｅｐｔｏｎｅｔａ ｘｕｉ ｓｐ．ｎｏｖ。     

我国艾蛛属4新种（蜘蛛目：园蛛科）

记述了我国艾蛛属４新种,名称为,柱艾蛛Ｃｙｃｌｏｓａｃｙｌｉｎｄｒａｔａｓｐ．ｎｏｖ畸形艾蛛Ｃ．ｉｎｆｏｒｍｉｓｓｐ．ｎｏｖ．小艾蛛Ｃ．ｍｉｎｏｒｓｐ．ｎｏｖ．,五突艾蛛Ｃ．ｐｅｎｔａｔｕｂｅｒｃｕｌａｔａｓｐ．ｎｏｖ。     

新疆蝗总科区系研究

新疆现有蝗虫１５７种,它们分别隶属于８科６２属。在１５７种蝗虫中,古北种占绝对优势,有１２０种,其次为特有种,有３５种,广布种甚少,仅２种。在古北种中,中亚种最多,其次为泛古北种,而欧洲西伯利亚种、地中海种和东北种均很少。在８个科中,泛古北种在网翅蝗科中占优势,中亚种在班翅蝗科中占优势,斑腿蝗科在蝗总科中是相当大的一个科,在我国也占有很大优势,但在新疆其属种数量却很少。     

广西金钟山鸟类保护区鸟类多样性初步研究

本文共记录到金钟山鸟类274种,分别隶属于18目57科,其中陆生鸟类251种,水鸟23种;以留鸟为主,共157种;候鸟、旅鸟分别为104种、13种;东洋种为优势类群,共有171种,古北种和广布种分别为4种、27种。这些鸟类中有国家重点保护鸟类39种,中国特有种鸟类3种,列入世界自然保护联盟红皮书名录中的鸟类5种,列入中国濒危动物红皮书名录中的鸟类20种,列入CITES附录中的鸟类34种。本文还对金钟山鸟类保护区的5种不同生境类型的鸟类种类组成作了比较,结果表明灌丛＋农田的鸟种多样性指数最高,为3．04;水域的鸟种多样性指数最低,为2．14。     

Zebra stripes and tiger stripes: the spatial frequency distribution of the pattern compared to that of the background is significant in display and crypsis

Some striped animals are camouflaged in their natural environment, whereas others are conspicuous. Mammals are known to have spatial frequency analysers in their visual mechanism, and it is suggested that the spatial characteristics of a striped pattern are different in camouflaged and conspicuous animals. Fourier analysis of the stripes of the zebra shows spatial frequencies in the pattern that are unlikely to be present so strongly in their natural background scene. A similar analysis of the camouflaging stripes of a tiger show that the distribution of spatial frequencies are similar to that in the background scene.     

Endemism in the Flora of China—Studies on the Endemic Genera

China, under highly varied ecological conditions resulted from wide latitudinal and altitudinal ranges and from the adequate precipitation, has developed a very rich flora of great diversity. As far as flowering plants are concerned, there are 2980 genera, 214 of which, belonging to 64 families, are endemic. Among these endemic genera, there are 9 genera of taxads and conifers, 19 genera of monocots and others of dicots. Of the approximately 129 herbaceous endemic genera in the Chinese flora as a whole, about 22 (17%) are annual and 107 (83%) are biennial or perennial. In the present paper the ecological distribution, the nature of endemic genera and the centers of endemism are discussed. 1. Three types of endemic genera are distinguished, neoendemics, palaeoendemics and active epibiotics, The endemic genera in the flora of China are, for the most part, considered to be very old ones, and most of them are of temperate nature. 2. the degree of endemism in our 22 floristic regions is shown in Figure 1. The areas richest in endemic genera in the Chinese flora as a whole are the 13, 16 and 17 regions. The poorest are the 2, 4, 9 and 10 regions, and no one in the 1 and 3 regions These results on floristic richness are of general applicability. As shown in table 1, the difference in the degree of endemism among the seven Chinese floristic subkingdoms are most pronounced. 101 endemic genera are known to occur in one subkingdom, 72 to occur in two subkingdoms, and 3 to occur in four subkingdoms, only one genus widely distributed in five subkingdoms. However, there is no genus occurring in seven subkingdoms. The difference in the degree of endemism in each subkingdom reveals that the distribution of endemic genera is not well-distributed in the Chinese flora as a whole. Analysis of the vertical distribution of the 200 endemic genera of the Chinese flora bears out that there is no evident increase in endemism as a whole with altitude. 3. Three centers of endemism are found (Fig. 2). These are as follows: a). Eastern Sichuan-western Hubei center. b). Southeastern Yunnan-western Guangxi center. c). Western Sichuan-northwestern Yunnan center. The degree of endemism andcharacters of endemic genera in each center are discussed.     

桂西北典型喀斯特区生态服务价值的环境响应及其空间尺度特征

Study on ecosystem service values (ESVs) is the bridge of understanding ecosystem and economic decision-making. To investigate the response of ESVs to ambient environment and their spatial scales is an urgent work in the process of ecological restoration and sustainable development in southwest China. Based on the previous research results, the remote images, and weather data of 31 years (1975-2005), the response of ESVs to ambient environment and their spatial scales in a typical karst area of northwest Guangxi, China were evaluated with the method of empirical mode decomposition (EMD) in this paper. The results showed that ESVs had obvious variations with changes in elevation, rocky types and soil types, and had corresponding characteristics of spatial scales. The ESVs in middle and low elevation areas were higher, but they decreased due to human activities such as deforestation. The ESVs in peak-cluster depression areas were lower, and they would increase as influenced by policies such as returning farmland to forestland. The ESVs were influenced by rocky types, showing lower values but an increasing trend in the typical karst regions while higher values but a decreasing trend in non-karst regions. The average ESVs in the west part of the study region, which is not only the main nature reserve for rare wildlife species in Guangxi, but also one of the best preserved natural vegetation regions in China, were more than 15,000 RMB Yuan ha-1,. Comparatively, the ESVs were less than 10,000 Yuan ha-1 in the middle part of the region attributed to low vegetation coverage, serious peak-cluster depression and karst rocky desertification. After about 20 years, that is from 1985 to 2005, the ecosystem conditions had been improved and the ESVs had increased in the middle and eastern part of this study region. On the contrary, in most western part, which was dominated by subtropical evergreen broad-leaved forest, they had been worsened, and the balance values of ESVs were negative. As for the relationships of ESVs with rocky types and soil types, lime soil and red soil were the two main soil types that contributed to ESVs (The total contribution was above 60%, and it is 63.77%,64.37%,64.56%,64.91% respectively in the four years of 1985, 1990, 2000 and 2005.). The variance contribution of intrinsic mode function (IMF) and trend (R) showed that there were obvious special sales for ESVs in this study area, and the main spatial scales were about 2.7 km, 5.5 km, and 11.6 km. The variance contribution ratio was 12.29%, 11.26%, 11.49% respectively, and the trend (R) was high (17.74%). In conclusion, this study indicated that ecosystem conditions in the typical karst area were improved owing to the application of rocky desertification control policies, such as ecological migration and returning farmland to forestland. Besides, the main spatial scales of ESVs in the study area were the interactions of terrain, physiognomy, land use / land cover and human activities.     

Wood, bark and stem anatomy of New World species of Gnetum

Quantitative and qualitative data are presented for 11 collections of six species. The wide range of character states for the species is presented in the form of a key to emphasize their potential systematic correlations. Distinctive among these are phcllem characteristics. Fibre-tracheids are newly reported for lianoid Gnetum species. Cells previously thought to be like companion cells in secondary phloem are shown to be uniseriate rays, counterparts to uniseriate xylem rays. Laticifers are abundant in most of the species, and are newly described for secondary tissues of Gnetum. Presence of tyloses in laticifers of two species is apparently a new report for vascular plants. Tori are present in two New World Gnetum species, adding to the report in African species. Perforation plates are simple except near or in primary xylem, where they are simple or foraminate. Torus presence and foraminate perforation plate presence are features more reminiscent of Ephedra and other gymnosperms than of angiosperms. The bark of Gnetum is also very similar to that of Ephedra.     

中国罗汉松属叶角质层微形态结构及其分类意义

利用扫描电镜对罗汉松属8种2变种植物叶角质层内外表面进行了细致观察。发现罗汉松属植物叶角质层结构具有许多相似特征,表皮细胞较为规则,长方形或多边形,边缘波状弯曲;气孔器排列成带状,长轴均与叶脉一致,气孔器具较为明显的气孔塞和伏罗林环,气孔器保卫细胞极延伸明显,通常具有2~4个副卫细胞、不具极副卫细胞。但罗汉松属叶角质层结构也具有明显的种间差异,镰叶罗汉松和洛杉矶罗汉松同其它种类差异最大,这两种植物叶两面均具气孔器,角质层内表面垂周壁直,角质层凸缘不明显;贺氏罗汉松最为显著的特征是近轴面和远轴面表皮细胞的垂周壁角质层厚且凸缘均极其发达;小叶罗汉松近轴面表皮细胞排列较为规则,多数为方形,长轴与叶脉垂直,垂周壁之间的角质层突起较为显著,延伸到皮下层;兰屿罗汉松近轴面表皮细胞排列较不规则,多边形,细胞的角端比较钝,没有棱角;大理罗汉松气孔带间隔较小,有时两条气孔带挤在一起,使副卫细胞紧连,近轴面表皮细胞较短,方形或长方形,垂周壁之间的角质层较不发达;海南罗汉松角质层气孔带间隔较宽,气孔器形状为阔椭圆形,近轴面表皮细胞均为细长方形;变种短叶罗汉松和狭叶罗汉松与罗汉松也具有明显差异,短叶罗汉松近轴面表皮细胞排列不规则,垂周壁深波状弯曲,凸缘极为明显,但原种罗汉松近轴面表皮细胞排列较为规则,垂周壁浅波状弯曲,凸缘不明显,而狭叶罗汉松近轴面表皮细胞方形或长方形,比罗汉松的表皮细胞短,垂周壁直或略弯曲,角质层极厚。这些角质层微形态特征差异可以作为罗汉松属内种类分类鉴定的依据。     

离体草鱼肠道对亮氨酸和酪氨酸的吸收与利用

采用同位素示踪和肠道离体灌流方法,研究了草鱼离体肠道对亮氨酸(Leu)、酪氨酸(Tyr)的吸收转运与利用。实验结果表明:当Leu浓度从1.0mmol/L增加到5.0mmol/L、10mmol/L时,肠道吸收转运的速度表现出“高浓度抑制”效应,运输到肠道外的比例为83%、66%和35%;合成肠道蛋白质的比例为2%、5%和13%;肠道组织内游离形式的比例为9%、28%和49%;其他形式的比例为6%、1%和3%。Tyr浓度从0.5mmol/L增加到1.5mmol/L、2.5mmol/L时,肠道对Tyr的吸收转运速度也随之增加,运输到肠道外的比例为52%、55%和55%;合成肠道蛋白质的比例为17%、15%和16%:肠道组织内游离形式的比例为7%、10%和16%;其他形式的比例为24%、20%和13%。肠道在吸收转运Leu和Tyr的同时,也利用它们合成蛋白质的和其他方面,Leu的吸收利用受灌流试验氨基酸浓度影响较大、而Tyr受影响较小;随着肠道内灌流的试验氨基酸浓度增加,吸收转运到肠道外的比例下降、留存于肠道内的比例增加,肠道合成的蛋白质绝对量也增加。       

东北地区蒙古栎群落区系成分

根据吴征镒、王荷生区系分析方法, 分析了东北地区蒙古栎群落中２６１ 种维管植物的区系成分, 其中温带成分占４７－４７ ％ , 东亚成分占４２－０２ ％ , 中国特有成分占１０－５１ ％ （ 世界分布不统计在内） 。并分析了种所在属的分布区类型, 温带分布属占９０－３％ 。还分别分析了蒙古栎群落的乔木层、灌木层、草本层以及层间植物的区系成分。