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1.
本文描述采自湖北省恩施和咸宁地区的球蛛科圆腹蛛属一新种-湖北圆腹蛛Dipoena hubeiensis sp.nov.。 相似文献
2.
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,。 相似文献
3.
本文记述分布于我国陕西太白山的园蛛科Araneidae尖腹蛛属Aculeperia一新种,太白尖腹蛛Aculeperiataibaishanensissp.nov.,模式标本分别保存河北教育学院和西安师范学院。 相似文献
4.
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.. 相似文献
5.
本文记述采自我国吉林省长白山区的鞭蛛属一新种,即腹斑鞭突蛛Trichoncus maculatus sp.nov.本文测量单位为mm,模式标本均保存在白求恩医科大学生物教研室。 相似文献
6.
首次记述2种中国园蛛-类高居金蛛ArgiopeaeheroidesYinet.al.1989和双隆园蛛AraneusprominensYinetal.1989的雄蛛。 相似文献
7.
中国隙蛛属七新种(蜘蛛目:漏斗蛛科) 总被引:1,自引:3,他引:1
隙蛛属Coelotes隶属呈漏斗蛛科Agelenidae.本文记述隙蛛属蜘蛛七新种:双轮隙C.syzygiatus sp.nov.,月形隙蛛C.luniformis sp.nov.,似阴暗隙蛛C.subluctuosus sp.nov.,弯曲隙C.palinitropus sp.nov.。 相似文献
8.
本文记述了我国西南部武陵山地区球蛛科蜘蛛四新种:后弯齿螯蛛Enoplognatha lordosa sp.nov.,类刺丘腹蛛Episinus spinigeroides sp.nov.,盔肥腹蛛Steatoda craniformis sp.nov.和咸丰球蛛Theridion xianfengensis sp.nov.模式标本均保存在中国科学院动物研究所。 相似文献
9.
本文记述我国皿蛛科微蛛亚种蜘蛛的一新纪录属盾板蛛属PelecopsisSimon,1864,一新种黑突盾板蛛P.nigroglobasp.nvo.,及一新纪录种平行盾板蛛P.parallela(Wider,1834)。 相似文献
10.
本文记述管巢蛛属Clubiona6新种,即环管巢蛛Clubionacirculatasp.nov.,双齿管巢蛛Clubionadidentatasp.nov.,丝歧管巢蛛Clubionafiloramulasp.nov.,异管管巢蛛Clubionaheteroductasp.nov.,曲管巢蛛Clubionatortuosasp.nov.,横列管巢蛛Clubionatransversasp.nov.。 相似文献
11.
广西金钟山鸟类保护区鸟类多样性初步研究 总被引:7,自引:0,他引:7
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。 相似文献
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13.
D. GODFREY J. N. LYTHGOE† ‡ D. A. RUMBALL § 《Biological journal of the Linnean Society. Linnean Society of London》1987,32(4):427-433
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. 相似文献
14.
云南小孢发属地衣的分类 总被引:3,自引:0,他引:3
报道了云南小孢发属地衣13种,其中中国新记录种6个,它们是:喜马拉雅小孢发,尼泊尔小孢发,光滑小孢发,光亮小孢发,多叉小孢发,波氏小孢发,另外7种的形态及分布也在文中进行了讨论。 相似文献
15.
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 总被引:6,自引:0,他引:6
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. 相似文献
16.
江西木兰科植物的初步整理 总被引:3,自引:1,他引:2
通过野外采集及标本的整理鉴定, 确认江西产木兰科植物7 属22 种1 亚种, 其中3 种为江西特有种, 5 种为江西地理新分布。对各分类群进行了分类检索, 记载了其地理分布, 并列出凭证标本。 相似文献
17.
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. 相似文献
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中国罗汉松属叶角质层微形态结构及其分类意义 总被引:1,自引:0,他引:1
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。 相似文献
20.
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。
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