泉州市散白蚁的活动、分飞、危害及其防治

据平正明、何秀松 2 0 0 0年在《中国白蚁志》上发表的文章 ,已知我国目前有散白蚁 ( Retic-ulitermes) 1 1 1种 ,它分布在我国大江南北的广大地区 ,南起海南省的尖峰岭 (北纬 1 8.5°) ,北至辽宁省的丹东 (北纬 4 0 .1°)都有其活动危害的足迹。福建目前已知的散白蚁也有 1 9种 (黄复生89年 ) ,占全国散白蚁种类的 1 1 .1 2 %。泉州 (东经 1 1 7°35′- 1 1 9°0 5′、北纬 2 4°2 3′- 2 5°50′) ,在福建的东南沿海 ,依山面海 ,属海洋性季风气候 ,湿润多雨 ,四季常青 ,年平均气温为 1 8℃～ 2 1℃ ,年降雨量达 1 0 0 0 - 1 2 0 0 mm,非…     

厚体单脏吸虫Haplosplanchnus pachysomus (Eysenhardt, 1829) Looss, 1902 的宿主和地理新记录

报道检获于厦门附近海域 (2 4°2 5′2 4”～ 33′14”N ,118°0 3′5 8”～ 11′48”E)英氏鲻MugilengeliBleeker消化道的厚体单脏吸虫Haplosplanchnuspachysomus (Esyenhardt,182 9)Looss,190 2 .这在其地理分布和宿主上都属新记录 .共解剖英氏鲻 42尾 ,阳性 15尾 ,感染率为 34 .9% ,感染强度为 1～ 7枚 .对所得虫体进行描述 .     

原子特征参数δi′和连接性指数mL及其应用

原子特征参数 (δ′i)被定义为 :δ′i =Zi·Xpi2 · (ni- 1) - 1.由δ′i 建构无机分子的连接性指数 ( mL) ,其中 :0 L =Σ(δi′) 0 .5,1L =Σ(δi′·δj′) 0 .5.( 0 L) 2 与 33种过渡元素卤化物的ΔfH 的 R 为 0 .9692 ,( 1L) 0 .5与 2 0种碱金属卤化物的ln( 1/ U)的R 为 0 .994 8,均优于文献方法     

广西那坡县种子植物区系科属地理成分的分析

那坡县位于广西西南部 ,东经 10 5°31′～ 10 6°5′ ,北纬 2 2°5 5′～ 2 3°32′之间 ,处于滇、越、桂三地交接带 ,属古热带植物区北部湾地区的一部分 ,其地理位置特殊 ,植物种类极其丰富 ,有种子植物 174科 889属 2 2 0 1种。科、属的分布区类型分析表明 ,科的分布区类型以热带 -亚热带分布科所占比例最大 ,一些主产热带的科 ,如兰科、桑科、茜草科 ,荨麻科、番荔枝科等在本区系中有着丰富的属种 ;属的分析显示热带亚热带分布占70 9% ,其中又以热带亚洲分布最多 ,占 2 7 6 % ,其次是泛热带分布 18 8% ,热带分布远多于温带分布 (5 5 4∶2 15 ) ,显示出明显的热带北缘性质 ,具有热带向亚热带的过渡性。     

地球的潮汐力

在理论推理和数理分析的基础上 ,获得了地球产生周期性涨落变形的潮汐力表达式 .由潮汐力导致的潮汐 ,其波长和振幅随地球离黄道面的远近不同而变化 ,随着距离增加 ,波长与振幅逐渐减小 ,但同一环线上振幅各点一致 ,周期约 1 2 h.地球的胀缩特性和沿轨道径向的变化速度 ,是影响地球潮汐能量的决定因素之一 ,地球公转轨道的 2 68°1 5′处为潮汐能量最大处 .地球的潮汐力是由椭圆轨道运动产生的 ,由于月球的轨道运动是以地球为焦点 ,所以在月球上可以产生受地球影响的潮汐 ,而不可以产生相反的潮汐 ,因为海水或岩浆没有以月球为焦点的轨道运动     

原子特征参数δ_i~′和连接性指数~mL及其应用

原子特征参数 (δ′i)被定义为 :δ′i =Zi·Xpi2 · (ni- 1) - 1.由δ′i 建构无机分子的连接性指数 ( mL) ,其中 :0 L =Σ(δi′) 0 .5,1L =Σ(δi′·δj′) 0 .5.( 0 L) 2 与 33种过渡元素卤化物的ΔfH 的 R 为 0 .9692 ,( 1L) 0 .5与 2 0种碱金属卤化物的ln( 1/ U)的R 为 0 .994 8,均优于文献方法     

广西近海区棘皮动物的调查报告

本文根据1983月4月至1985年1月,在广西近海区(东经108°12′30″～109°41′、北纬20°53′45″～21°46′)进行底栖生物调查所获得的资料,主要阐述棘皮动物在广西近海区的组成、分布及季节变化: 1.本次调查共获棘皮动物标本10734个,共67种,分隶于5纲,11目,25科、44属。海参纲出现的种数最多。 2.棘皮动物的种数在平面分布上比较有规律,出现深水区高于浅水区的趋势。但其数量、生物量及栖息密度的分布很不规则,这主要与个别种出现量巨大有关。 3.棘皮动物在各季度总生物量平均值波动于2.83～6.35克/米~2之间,总平均为4.38克/米~2。总栖息密度平均值波动于26～145个/米~2之间,总平均为98个/米~2。 4.洼颚倍棘蛇尾(depressus)出现量最大,共获5976个,占棘皮动物总采获量的55.7％。     

Distribution Characteristics and Influencing Factors of Geological Hazards in Tibet

0IntroductionTibet is located at26°50′-36°33′Nand78°25′-99°06′Ein the southwest of China,which isbounded by Sichuan,Yunnan,Qinghai Provincesand Xinjiang Uygur Autonomous Region and coun-tries suchas Nepal,India,Bhutan,Sikki mand My-anmar[1].As main part of Qinghai-Tibet Plateau,Tibet has a special and complex geological condi-tion.Accordingtothe geotectonics,Tibet lies with-in the east of the huge Alps-Hi malayas mountainsystem.Because the Indian Plate continues divinginto no…     

不同纬度地区桐花树种群的遗传多样性研究

采用垂直板型聚丙烯酰胺凝胶电泳测定了不同纬度地区桐花树种群的遗传多样性和遗传分化 .桐花树种群维持有较高的遗传变异性 ,观察杂合度为 0 2 51,期望杂合度为 0 197.种群间遗传分化系数较小为GST=0 .2 15,表明总的遗传变异中有 2 1 5%来自种群间 .种群间遗传距离和遗传一致度均值分别为 0 0 93和 0 912 ,基因流较小 ,Nm =0 .887.研究还发现纬度为2 2°N的深圳福田种群、 2 1°N的广西英罗湾种群的遗传变异要高于纬度为 19°N的海南东寨港种群和 2 4°N的高纬度的福建浮宫种群 .     

早花金花茶地理分布及生态生物学特性研究

对一种最近在大新县发现的,目前已知最早开花的,暂定其中文名为早花金花茶的金花茶组植物,进行地理分布和生态生物学特性研究。结果发现,该种金花茶分布在广西西南部大新的榄圩乡和崇左市的左州、太平镇的20个村屯范围内,位于东经107°16′～107°22′,北纬22°30′～22°39′的岩溶区域,垂直分布海拔高220～450m,为岩溶山地季节性雨林灌木层组成种类,具有一定耐旱能力。现状群落为次生幼中龄林,区系组成是热带分布型科属占主导地位,与温带分布型科属分别呈9.0∶1.0和8.9∶1.1的组成格局;群落结构简单,乔木层和灌木层发育稍好,草本层发育很差。居群个体多以复茎形式存在,以萌生和实生苗更新方式实现其种群的延续。     

Cretaceous synfolding remagnetization components revealing tectonic rotation of the middle Yangtze fold belt

To reveal the deformation process of the middle Yangtze fold belt, we conducted a paleomagnetic study on Middle Triassic limestones and Middle to Late Jurassic sandstones from Wanzhou, Chongqing. Stepwise thermal and alternating field demagnetization were used to isolate the multi-component re-manent magnetizations. The Jurassic samples were overprinted by recent geomagnetic field, while three magnetization components were isolated from the Middle Triassic samples. A low temperature component (LTC) was isolated at temperatures below 200℃, an intermediate temperature component (ITC) at 200―360℃ and a high temperature component (HTC) at 400―460℃. The LTC is distributed around the present-day Earth magnetic field, probably a viscous component. Stepwise unfolding indi-cates that the maximum precision parameters of ITC and HTC components are achieved at 33±8% and 50±27% (with 95% confidence) unfolding, respectively. The best-clustered ITC mean direction, Dec = 11.2°, Inc = 45.2° (α₉₅ = 4.5°, N = 34), corresponding to a paleopole at 79.3°N, 219.5°E (d_p = 3.6°, d_m = 5.7°), is consistent with the Cretaceous reference direction of the South China Block (SCB). The best-clustered HTC mean direction (taking 70% unfolding), Dec = 24.2°, Inc =49.0° (α₉₅ = 3.6°, N = 23), corresponding to a paleopole at 69.2°N, 195.5°E (d_p =3.1°, d_m = 4.8°), suggests a clockwise rotation of 12.8°±3.5°. These synfolding remagnetization components clearly reveal that a clockwise rotation happened at the middle stage of folding, thus supporting that at least part of the variation in fold axis strikes is due to orocline rotation. Combined with published data, our analysis indicates that the Wan-zhou-Xiangxi segment of the middle Yangtze fold belt experienced oroclinal bending. Furthermore, a published post-folding component isolated from the Middle Triassic Puqi Formation suggests a 27.5°±5.8° clockwise rotation, confirming that at least 50% of the observed clockwise rotations in the eastern middle Yangtze fold belt can be attributed to oroclinal bending. The remagnetization data and geological evidence observed in the middle Yangtze fold belt suggest that collision between SCB and North China Block (NCB) probably lasted till the early period of Early Cretaceous.     

广西大明山昆虫区系考察初报

分析了大明山昆虫区系的特点,并提出以不同的昆虫种类组成作为环境评估的指征。     

广西农业区东方田鼠生物学及其生态地理特征

报道在广西农业区分布东方田鼠（Ｍｉｃｒｏｔｕｓｆｏｒｔｉｓ）的生物学及其分布生物小区的生态地理学特征。提出东方田鼠在农业区是呈间断式局部分布的，它的种群数量在分布区的鼠类群落中相对较低，主要栖息在岩溶—河谷—农田地带，其分布的南部界限约达北纬２３°３０     

Hydrogen isotopic compositions and their environmental significance for individual n-alkanes in typical plants from land in China

Hydrogen isotopes of n-alkanes in grasses, tree leaves and reeds from six regions with latitudes of 20° to 39°N in China are measured by GC-TC-IRMS analytical technique in order to understand their hydrogen isotopic compositions and environmental significance. The results show that a difference in ° D values (from −42.1‰ to −66.6‰) of n-alkanes exists among the same kinds of plants from various regions. Hydrogen isotopic compositions of most even carbon numbered n-alkanes in every plant are slightly heavier than that of the odd homologues. A trend toward D-enrichment with increasing chain length of n-alkanes in most plant samples is observed. Mean ° D values of n-alkanes in the studied plants range from −202.6‰ to −130.7‰ and the reed from a salt marsh has the largest value. The mean ° D values of individual n-alkanes among the same kinds of plants from various regions have the characteristics of leaf > reed > grass. The hydrogen isotopic compositions of n-alkanes are apparently distinct among various kinds of plants from the same region and the mean ° D values exhibit a distribution of tree leaf > reed > grass. It is observed that the mean ° D values of n-alkanes and ° D values of C₂₇ and C₂₉ n-alkanes in the grasses and tree leaves from these studied regions correlate clearly negatively with latitude and positively with temperature, indicating that these values can be used as excellent indicators of environment and climate. These results provide important basic data for understanding the distributional law of hydrogen isotopes of individual n-alkanes and their applied research. Supported by National Natural Science Foundation of China (Grant Nos. 40642007 and 40772069), National Basic Research Program of China (Grant No. 2005CB422105) and Special Project for Winners of CAS President Award     

Recent temperature increase recorded in an ice core in the source region of Yangtze River

Interests on climate change in the source region of Yangtze River have been raised since it is a region with the greatest warming over the Tibetan Plateau (TP). A 70-year history of precipitation δ~(18)O has been recovered using an ice core record retrieved in a plat portion of the firn area in the Guoqu Glacier (33°34′37.8″N, 91°10′35.3″E, 5720 m a.s.l.), Mt. Geladaindong (the source region of Yangtze River), in November, 2005. By using a significant positive relationship between ice core δ~(18)O record and summer air temperature (July to September) from the nearby meteorological stations, a history of summer air temperature has been reconstructed for the last 70 years. Summer temperature was relatively low in 1940s and high in 1950s to the middle of 1960s. The lowest temperature occurred in the middle of 1970s. Temperature was low in 1980s and dramatically increased since 1990s, keeping the trend to the begin-ning of the 21st century. The warming rate recorded in the ice core with 0.5℃/10 a since 1970s is much higher that that in the central TP and the Northern Hemisphere (NH), and it becomes 1.1℃/10 a since 1990s which is also higher than these from the central TP and the NH, reflecting an accelerated warm-ing and a more sensitive response to global warming in the high elevation region.     

Discovery of C<Subscript>4</Subscript> species at high altitude in Qinghai-Tibetan Plateau

Plant specimens are collected from the areas between latitude 27°?2′N and 40°57′N, and longitude 88°93°E and 103°24′E, with an altitudinal range from 2210 to 5050 m above the sea level in Qinghai-Tibetan Plateau. The stable carbon isotope analysis indicates that two of Chenopodiaceae and six of Poaceae in the samples are C4 plants. Four of the C4 plants are found in 11 spots with altitudes above 3800 m, and Pennisetum centrasiaticum, Arundinella yunnanensis and Orinus thoroldii are present in six spots above 4000 m, even up to 4520 m. At low CO2 partial pressure, that sufficient energy of high light improving C4 plant's tolerance of low temperature and precipitations concentrating in growing season probably are favorable for C4 plants growing at high altitude in Qinghai-Tibetan Plateau.     

南宁市大岭地区鸟类调查初报

南宁市地处北回归线以南,北纬22°77′——22°48′,东经108°22′——108°25′大岭地区位于该市的西北隅.南宁市的鸟类前人考察甚少,至今未见过报道。1982——1988年我们对该市大岭地区的鸟类作了调查.共记录到鸟类102种(另附10亚种),隶属12目32科,其中有林三趾■等7种或亚种为广西鸟类新纪录。大岭地区有繁殖鸟57种,其中留鸟47种,夏候鸟10种。经区系分析,在繁殖鸟中东洋种占80.7%,古北种占5.3%,余为广布种,此外,作者时如何保护近郊的鸟类提出了刍议。     

Latitude-dependence and dispersion of the westward drift in the geomagnetic field

The main geomagnetic field models of IGRF1900---2000 are used to study the latitude-dependence of the westward drift in the main field. The results show that the latitude-dependence exists in the magnetic components with different wavelengths (m=l-10). The globai-average westward drift rate of the component of m=l is 0.189°/a with the maximum of 0.295°/a at latitudes 40°-45°. The component of m=2 has an average drift rate of 0.411°/a with the maximum of 1.305°/a at latitude -60°. As for the components with further shorter wavelengths, the drift is generally restricted in a limited latitude range, and has many smaller drift rates. This latitude-dependence of westward drift can not be explained by rigid rotation of the earth's core. The results of this note also show that there is a negative dispersion in the westward drift, namely the components of long wavelengths drift faster than those of short wavelengths.This dispersion feature is not in agreement with Hide's MHD model. It is likely needed to find a new mechanism for explaining the observed feature of dispersion.     

Latitudinal shift and tilt of the ring current during magnetic storms

The equatorial ring current (ERC) theory suggested that the distribution of global disturbed horizontal geomagnetic field only depends on the cosine of station’s latitude. However, we always observe a larger ΔH at higher latitude stations than lower ones, implying that the ERC could tilt or/and shift with respect to the equatorial plane during intense storms. In this paper, we analyze 11 intense magnetic storms from 2000 to 2004, and introduce two configurational factors to characterize the topology of storm time ring current. The results show that ERC has occasionally deviated off equatorial plane with both tilt angle δ_t≈13°―25° and latitude shift δ_s≈0°―21.8°. The ground disturbed field distribution should be improved as ΔH_k = ΔH_maxcos(φ_k-δ ), which agree well with the geomagnetic observations.