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调查区     
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  survey area
     The cell abundance of phytoplankton in survey area is 5.28×104 cell/m3~31.20×104 cell/m3, the mean value is 12.94×104 cell/m3.Because of the tidewater,the high abundance of phytoplankton is occurred in No.
     调查区浮游植物细胞丰度为5.28×104cell/m3~31.20×104cell/m3,平均值为12.94×104cell/m3。
短句来源
     With a lot of rainfall and the well developed underground karst forms, there exist abundant karst underground water resources in southwest China. In the geological survey area of 430,000 km~2, the natural resources of underground water amount to some 1762.82×10~8 m~3/a, and the allowed exploiting quantity of underground water reaches 615.70×10~8 m~3/a.
     由于降水丰富、地下岩溶发育,西南岩溶地下水资源丰富,在43万km2调查区内,具有地下水天然资源量1762.82×108m3/a,岩溶地下水允许开采资源量615.70×108m3/a。
短句来源
     The average species richness(D)in survey area is 0.84,the average Shannon-wiener diversity index(H') is 2.30;
     调查区内浮游植物群落物种丰富度指数(D)平均值为0.84; 香农-威纳多样性指数(H′)平均值为2.30;
短句来源
     Cell abundance of planktonic diatoms in the survey area is relatively low, it is due to nutrient restriction, but there are two high concentration areas near northeast of Taiwan Island and 30°N, 127°E.
     调查区浮游硅藻的细胞数量偏低,主要受营养盐的限制,在台湾岛东北和30°N,127°E附近海域有两个密集区.
     The stock is estimated over 550t in the survey area.
     估算调查区内的资源量超过 550t。
短句来源
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  investigation area
     Analysis of the trace elements in the manganese nodules from the northern part of the Central Pacific Ocean shows that economically valuable elements such as Ni, Cu, Zn, Co, Pb, and Sr are quite rich in the investigation area.
     中太平洋北部锰结核中的微量元素分析表明,调查区具有经济价值的金属元素Cu,Ni,Co,Zn,Pb以及Sr含量很高。
短句来源
     The distribution of chlorophyll a in the areas adjacent to the Ryukyu-gunto is reported. The results are as follows :The concentration is lower, ranging from 0.022 to 0.823 mg/m3, and mean value is 0.105 mg/m3 in the investigation area. The horizontal distributions are related with the water masses.
     给出了1997年夏季在琉球群岛周围水域内叶绿素a含量的分布,结果如下:调查区内叶绿素a含量低,变化范围在0.022-0.823 mg/m3之间,平均值为0.105mg/m3.平面分布与水团相关,断面和垂直分布同水团和温跃层相关.
     On the basis of the investigation by remote senseing, the present situation of rocky desert of 2005 in Mabiehe catchment was basically revealed. The total area of rocky desert in the whole investigated region is approximately 1203.35 km2, accounting for 41% of the total investigation area and 54% of the karst mountain area.
     通过本次卫星遥感调查,基本查明了2005年马别河流域的石漠化现状,调查区石漠化总面积达到1203.35km~2,占调查区总面积的41%,占岩溶石山区的54%。
短句来源
     ConclusionFrom east to west the condition of panda habitat becomes from good to bad gradually, but the most investigation area is suitable for habitat of panda.
     结论 调查区内大熊猫栖息条件自东向西由好逐渐变差,但目前调查区内绝大部分区域是适宜大熊猫栖息的。
短句来源
     Standard of Soil Environment,with the result that it is not so polluted with heavy metals in the investigation area and Cr and Cd exceed the Standard only in KongJia District.
     研究结果表明,调查区内重金属元素污染较轻,只有孔家区Cr、Cd的含量超标。
短句来源
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  investigated area
     The investigated area (within the location of 85-86E, 43°12'-44N) was situated in the northern slope of Mount Yiliahabirga in the Tianshan Mountains.
     调查区位于E85°~86°,N43°12′~44°,属北天山伊连哈比尔尕山北坡。
短句来源
     On the whole, there are 191.566 2 hm~2 bare land, which accounts for 12.28% of the whole investigated area.
     全部开发建设造成裸露面积191.5662hm2,占调查区总面积的12.28%等。
短句来源
     The dominant species in the investigated area are Calanus propinquus,Calanoides acutus, Metrdia gerlachei and the larvae of antarctic krill.
     南极种挠足类 Calanus propinquus、Calanoidesacutus、Metrdia gerlachei和南极磷虾幼体为调查区的优势种。
短句来源
     The results showed that the quality of the seawater and sediment in the investigated area was fine and the environment in ths south of the area was better than in the north.
     结果表明,调查区环境质量良好.南部海域环境优于北部。
短句来源
     The on-the-spot investigations and experiments show that the soil in the investigated area is comparatively strong in maintaining the metals such as Hg, Cd, Cu etc.
     现场调查及试验表明,调查区土壤对Hg,Cd,Cu等金属有较强的滞留能力。
短句来源
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  “调查区”译为未确定词的双语例句
     The surveyed areas were situated in 40° 10-44° 43' N, 119° 51' -120° 25' E.
     本次调查区位于北纬40°10′~44°43′,东经119°51′~120°25′。
短句来源
     An investigation was carried out for presence of natural plague foci in the area (270 km2) between 75° 18 ' -75° 32' east longitude and 40° 22' -40° 32' north latitude.
     调查区位于E75°18′~ 75°32′,N40°22′~40°32′之间,面积约270平方公里。
短句来源
     Around the nuclear testing site in Xinjiang, the 90Sr and 137 Cs content of 17 kinds of main food respectively were 1.1 -72.3 and 0.3 -40.7×10-2Bq/kg in 9 investigation areas;
     本文报道了新疆核试验场周围地区9个调查区17种主要食品中~(90)Sr、~(137)Cs含量分别为1.1~72.3,0.3~40.7×10~(-2)B_q·Kg~(-1);
短句来源
     Among the gamasid fauna Hypoaspis gracilis Meledjaeva, 1963, Androlaelaps sardous Berlese, 1911, Pneumolaelaps hyatti Evans et Till, 1966 and Parasitus setosus Oudemans et Voigts, 1904 are recorded for the first time in this country, and a trombiculid species of the genus Cheladonta is recorded for first time in Xinjiang.
     到目前为止,调查区内共发现革螨17属35种,其中纤细下盾螨Hypoaspis gracilis Meledjaeva,1963、沙氏阳厉螨Androlaelaps sardous Berlese,1911、海氏肺厉螨Pneumolaelaps hyatti Evans et Till,1966和毛寄螨parasitus setosus Oudemans et Voigts,1904是国内新纪录。
短句来源
     Studies show that the 87 Sr/ 86 Sr ratios of phosphate samples vary from 0.70766 to 0.70842, corresponding to apparent ages of 21 to 39.5 Ma.
     研究表明 ,我国调查区磷酸盐的87Sr/ 86Sr比值变化于 0 .70 76 6至 0 .70 84 2之间 ,形成年代相当于距今 2 1Ma至 39.5Ma。
短句来源
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  enumeration district
(d) Tract and enumeration district social indicator rankings uniquely account for less than .50% of the explained variance of individual mental health scores when analyzed in a regression equation which includes socioeconomic status as a variable.
      
An additional random effect at the enumeration district level has also been added.
      
Consider again H1 and H2, the histories of the location of LS member P and of the boundary of enumeration district E in Section 4.4.
      
Each enumeration district is defined by the list of addresses contained within it.
      
Errors in postcode to enumeration district mapping and their effect on small area analyses of health data.
      
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  survey area
It was determined that in the survey area, the life span for Buccinum bayani bayani was nine years; for B.
      
The survey area covers 0.1 ster centered on the direction α=10h28m and δ=41°.
      
The technique called DHAF technique has been applied to several survey area and obtained good result where the coincidence rate for hydrocarbon detection is higher than other similar techniques.
      
The combination of the two different datasets can obtain the exact velocity structure upper 60 m depth in the survey area.
      
In 840 km2 survey area 150 Great Bustards were found.
      
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  investigation area
By means of modelling air and cambial temperature for any location, an investigation area is evaluated with respect to its thermal conditions for the development of Ips typographus (Coleoptera: Scolytidae).
      
Mesozooplankton dry mass (DM) integrated over the upper 1,500?m of the water column was surprisingly stable throughout the investigation area and measured 2.0±0.3?g DM m-2.
      
High grazing pressure at the ice edge of the investigation area is another factor eliminating ice algae released during melting.
      
thompsoni exhibited a relatively high grazing impact on primary production (72%) in the north of our investigation area.
      
Application of these results to the available sedimentological data allowed the main benthic communities in the investigation area to be mapped.
      
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  investigated area
Formation of the microbial community in bottom sediments of the investigated area is influenced by the Selenga River.
      
Contribution of the main sources of substance input in the precipitation on the investigated area is assessed.
      
The average contents of Chl-a and Pha-a in the sediment of the 0-8cm layer in the investigated area are 0.31-0.47μgg-1 and 1.28-1.40 μgg-1 sediment (dry weight), respectively.
      
Comparison of the palaeomagnetic results from the western Iberian Ranges and from the Iberian Massif indicates that the investigated area of the Iberian Ranges forms part of Stable Iberia.
      
The maximum horizontal offset reaches 20 cm on the investigated area at the level of the geoid.
      
更多          


The city of Lanehow lies in the central part of China in latitude approximate 36°03′north, longitude 103°57'east, at elevation 1,508.53 M. Kowlanshan, the area surveyed, being one of the many loess plateau hills surrounding Lanchow, situates on the southeastern suburb of the city. Physiographically, the area is a part of the dissected loess plateau with an altitude of 1,508-2100 M. Owing to the influences of the geographical condition and high elevation, the climate of this area is of continental climatic type....

The city of Lanehow lies in the central part of China in latitude approximate 36°03′north, longitude 103°57'east, at elevation 1,508.53 M. Kowlanshan, the area surveyed, being one of the many loess plateau hills surrounding Lanchow, situates on the southeastern suburb of the city. Physiographically, the area is a part of the dissected loess plateau with an altitude of 1,508-2100 M. Owing to the influences of the geographical condition and high elevation, the climate of this area is of continental climatic type. The mean annual precipitation is 338.6mm. with 61.1% of it falling in June, July and August, annual mean temperature, 6.9℃., relative humidity, 58%, annual total evaporation, 3,571mm. and annual mean wind velocity 5.8m/sec. The upper portion of the hill is entirely covered with a thick layer of loess and underneath lies the red earth of the tertiary period. As a result of that, soils in the area surveyed, which has been developed from the loess, is high in calcium content. It belongs to the chestnut soil type with a PH value between 7.6 and 8.1. The vegetation of this area shows the following ecological characteristics: 1) The specific composition of the plant is rather scanty with about. 124 speeies belonging to 93 genera and 41 families; 2) The vegetation bears a simple physiognomy. No natural growth arbor been found in the whole area during the period of investigation, though a few species of cultivated trees are found and the vegetation is mainly composed of semi-frutexes and herbages; 3) Most of the essential species distributing here express distinct xeromorphic structures and many of them are typical components of the vegetation of the steppe and semi-dessect, such as Caragana spp., Hololachne soongarica Ehrenb., Artemisia spp., Chrysanthemum neofruticulosum Ledeb., Stipa spp. Achnatherum splendens Ohwi. and so on. Four plant associations are found in this area. Three of them distribute on the Dorthern slope and one on the southern slope of the hill. They are described as follow: Ⅰ. Chenupodium album+Artemisia annua+Elymus dasystachys Association. The distribution of this association is limited to the erosion valleys situating on the piedmont belt of the northern slope at an elevation between 1, 510 and 1, 560 M., where the edaphic condition is marked by high soil moisture content. The climatic features are of low light intencity with short duration of daily sunshine, high relative humidity and low wind velocity. Three hygrophilous and shade-loving species are the main constituents of this association. They are chenopodium album L., Artemisia annua L., and Elymus dasystachys Trin. Other herbaceous plants are Chenopodium glaucum L.. Sonchus aler- aceus L., Xanthium strumarium L., Polygonum amphibium L., P. aviculare L. etc. A few shrubs are present in the association. They are Lycium chinensis Mill., Lonicera heteroloba Batal. and Lonicera ferdinandi Fr. Ⅱ. Artemisia pectinata Association. The Artemisia pectinata Association occurs on the piedmont belt of the northern slope at an elevation varying from 1510 to 1580 M. It occupies the open slope with gradients under 15°. The climatic conditions, in speaking of the northern slope, are rather high in temperature, strong light intencity, low relative humidity and low wind velocity. The projective total cover-degree is about 50% and Artemisia pectinata Pall. appears to be the dominant species in the association. Besides, there are species of thermophilous and heliophilous plants such as Salsola kali L., S. arachnoides‘Moq’. Kung, Cymbaria mongolica Maxim., Artemisia capillaris Thumb., Aster altaicus willd., chrysanthemum neofruticulosum Ledeb., which are frequently scattered among the dominant plants. Plants growing in this association, are all below 10 cm. in height. They give an appearence of open association. Ⅲ. Chrysanthemum neofruticulosum+Artemisia sacrorum var. latiloba—Polytrichum sp. Association. This association, being the largest one in the surveyed area, appears on the northern slope, where it occupies the space ranging from altitude 1,580M. to the top of the hill,2,100M, above the sea level. Soil is of chestnut soil type with a PH value of 8. 0—8. 1.The soil moisture content varies between 6.0 and 7.4%(layer above 60 cm.). In vertical structure, the association consists of two strata. They are described below: Stratum Ⅰ: This stratum includes all shrubs, semi-frutexes and herbages which are taller than 10 cm. in height. Among the plants found in this stratum, chrysanthemum neofruticulosum Ledeb. and Artemisia sacrorum var. latiloba Ledeb. are dominant species and Stipa Bungeana Trin. is the subdominant one. Other species one may frequently meet with are Allium subangulatum Rag., Saussurea nigrescens Maxim., Peganumharmala L., Astragalus dahuricus Dc., Potentilla multifida L., Linum perenne L., Car-agana frutex K. Koch. etc. They spread widely in almost all over the association. Stratum Ⅱ: This stratum is composed of those species less than 10 cm. in height, forming the ground flora of the association. Polytrichum sp. and Lichens are the essential plants in the stratum. One may occasionlly find species of Plantago Lessingii and Gentiana squarrosa Ledeb. growing among those main constituents. The underground stratification of the association has also been studied during the time of surveying. IV. Stipa Bungeana+Aster altaicus+Chrysanthemum neofruticulosum Association. This association distributes on the entire southern slope except the portions tilled for agriculture purposes. The striking local ecological conditions of this association are strong light intensity with long duration of daily sunshine, high temperature, low relative humidity and extremely low in soil moisture content which ranges between 2. 7 and 4. 0% (the layer above 60cm.). On account of the severe destruction of natural vegetation by man and cattle in the past years, the degree of soil erosion is serious throughout the slope where the association locates. The PH value of the soils is 7.4-76. The polydominant plants in this association are Stipa Bungeana Trin., Aster altaicus Willd. and Chrysanthemum neofruticulosum Ledeb. They are quite adaptable to the drought condition of the environment and distribute widely in the association. Besides, other xerophilous or drought resistant plants are frequently met, such as Hololachne soongarica Ehrenb., Linum perenne L., Astranalus dahuricus Dc., Peganum harmala L., Artemisia sacrorum var. latiloba Ledeb., Artemisia capillaris Thumb., Incarvillea Iutea Bur.&Franch., Kochia scoparia Schred. etc. They dispersely grow in the association. In addition to the frequent species mentioned above, Salsola ruthenica Iljin. and S. arachnoides‘Moq’. Kung form seperately micro-associations lying scatterly on the slope. No ground flora stratum may be found and the association shows no above ground stratification. The projective total cover-degree of this association is only about 25-30%. Owing to the difference in the aspects of the northern and sourthern slopes, the climatic and edaphic conditions vary remarkable. Therefore, the vegetation of the surveyed area shows distinctions in distribution, floristic composition, physiognomy, structure, condition in growth and development of plants in the association of different slopes. Taking the floristic composition for example, the following species are entirely absent in the association of the northern slope, yet they are main components on the southern one: Pappophorum brachystachyum Taub. et Spach, Thermopsis lanceolata R. Br., Caragana spinosa Dc., Stellera chamaejasme L., Hololachne soongarica Ehrenb., Nitraria schoberi L., Pennisetum flaccidum Griseb. Differences in elevation also induce striking changes in climatic and edaphic con-ditions especially in aspects of air temperature, relative humidity and soil moisture content. All these gives great influence to the alterations either in quantity or in quality of each species distributing along the northern slope of the area. Following the seasonal change, the physiognomy of the associations expresses sucession of seasonal aspect. Vernal, aestival and autumnal aspects have been observed and recorded.

兰州位于我国的中心,约占北纬36度03分,东经103度57分,拔海1508.53米。皋兰山是兰州四周环山中的最高峰,位居兰州市东南郊。在地形上,皋兰山属于分割黄土高原山岭的一部分,拔海高度约为2100米。由于地理位置及海拔的影响,兰州的气候属大陆性气候类型。年平均温度为6.9℃,年平均雨量为338.6毫米,而61.61%集中在6、7、8、三个月,全年各月平均相对湿度为58%,年蒸发量则达3,571毫米,风力为5.8米/秒。皋兰山山岭的顶部均为厚层的黄土所掩盖,其下则为第三纪红土层。因此,调查区的土壤,全由黄土母质发育而来,含多量钙质,属栗钙土类,PH值为7.6—8.1。调查区的植被,有如下的生志特点:(1)植物种属比较贫乏:全区植物只有41科,93属,124种;(2)群落外貌单纯:调查区内缺乏自然生长的乔木,植被主要由半灌木与草本植物所构成,属干燥草原区的灌木草本群落型;(3)植物具明显旱生形态:群落主要成分,很多是干燥草原区的代表种属,如锦鸡儿属、蒿属、菊属的小黄菊(Chrysanthemum neofruticulosum Ledeb.)、羽茅属、芨芨草等。它们都具有各...

兰州位于我国的中心,约占北纬36度03分,东经103度57分,拔海1508.53米。皋兰山是兰州四周环山中的最高峰,位居兰州市东南郊。在地形上,皋兰山属于分割黄土高原山岭的一部分,拔海高度约为2100米。由于地理位置及海拔的影响,兰州的气候属大陆性气候类型。年平均温度为6.9℃,年平均雨量为338.6毫米,而61.61%集中在6、7、8、三个月,全年各月平均相对湿度为58%,年蒸发量则达3,571毫米,风力为5.8米/秒。皋兰山山岭的顶部均为厚层的黄土所掩盖,其下则为第三纪红土层。因此,调查区的土壤,全由黄土母质发育而来,含多量钙质,属栗钙土类,PH值为7.6—8.1。调查区的植被,有如下的生志特点:(1)植物种属比较贫乏:全区植物只有41科,93属,124种;(2)群落外貌单纯:调查区内缺乏自然生长的乔木,植被主要由半灌木与草本植物所构成,属干燥草原区的灌木草本群落型;(3)植物具明显旱生形态:群落主要成分,很多是干燥草原区的代表种属,如锦鸡儿属、蒿属、菊属的小黄菊(Chrysanthemum neofruticulosum Ledeb.)、羽茅属、芨芨草等。它们都具有各种适应干旱环境的形态特征。调查区植物群落,可区分为下列的四个群丛: 1.白药+黄花蒿+厚穗滨草群丛(Chenopodium album+Artemisia annus+Elymus dasystachys Association) 本群丛分布于皋兰山山麓的侵蚀沟谷内,约占海拔1510至1560米的地段。所在地气候与土壤特点是光线弱、日照时间短、风力小、大气相对湿度大与土壤潮湿。群丛优势种有白藜、黄花蒿和厚穂滨草三种喜湿耐阴植物。此外,伴生有灰绿藜、苦苣菜、苍耳、两栖蓼、扁蓄等草本植物。灌木则可见枸杞(Lycuim chinensis Mill)、紫金银花(Lonicera heteroloba Batal.)、裴氏金银花(L.ferdinandi.Fr.)三种。 2.篦叶蒿群丛(Artemisia pectinata Association) 这一群丛占据皋兰山北坡山麓海拔1510—1580米,坡度在15°以下的开旷地段。其环境条件,在北坡来说,主要表现于阳光充沛,温度高,大气相对湿度低与土壤干燥。群丛总夏盖度约为50%,而以篦叶蒿最占优势。常见植物有钾猪毛菜、灰蓬(Salsola arachnoides‘moq’Kung)、蒙古芯芭(Cymbaria mongolica Maxim.)、茵陈蒿、阿尔泰紫菀、小黄菊等喜光喜温种类。 3.小黄菊+供蒿-藓群丛(Chrysanthemum neofruticulosum+Artemisia sacrorum var latiloba-Polytrichum sp. Association) 本群丛包括皋兰山北坡自海拔1580米以上一直至山顶(海拔2100米)的全部地段,为调查区内分布面积最广的群丛。其生态环境是阳光弱、日照时间短、蒸发量小、气温低;土镶为栗钙土,PH值在8.0—8.1左右,土壤风干含水量为5.2—5.6%。群丛在垂直结构上,可分为两层:第一层包括高度在10厘米以上的灌木、半灌木与草本植物,而以小黄菊和供蒿最占优势。本氏羽茅则为本属中的亚优势种。常见植物尚有野葱、青木香(Saussurea nigrescens Maxim.)、骆驼蓬、达乌里紫云英,多裂委陵菜、宿根亚麻、木锦鸡儿(Caragana frutex K. Koch.)等。第二层为地被层,主要由藓类和地衣所组成。此外,偶尔出现细叶车前(Plantago Lessingii)与鳞叶龙胆(Gentiana squarrosa Ledeb.)铺地生长。群丛总复盖度约为67%。 4.本氏羽茅+阿尔泰紫菀+小黄菊群丛(Stipa Bungeana+Aster altaicus+Chrysanthemum neofruticulosum Association) 这一群丛占皋兰山南坡除农田以外的全部地区。其气候与土壤条件,可归纳为下:日晒强烈、日照时间长、气温高;人为对自然植被破坏强烈,表土冲刷现象异常严重。土壤水分含量甚低,仅占风干重的1.88—3.41%,pH值为7.4—7.6。本氏羽茅、阿尔泰紫菀与小黄菊为群丛中的主要种类。它们对于干旱的环境均具有强大的适应力。其他常见植物有红砂、宿根亚麻、达乌里紫云英、骆驼蓬、供蒿、茵陈蒿、黄角蒿(Incarvillea lutea Bur.&Franch.)地肤等抗旱或耐旱种类。苏联猪毛菜(Salsola rutheniea Iljin)和灰蓬,常各成单纯小群丛,出现于山坡间。本群丛中缺地被层,无地上成层现象。群丛总复盖度仅为25—30%。由于南北坡取向不同所引起气候与土壤因子的变化,调查区植物群落,在分布、结构、外貌、种类成分及生长发育状况上,也随着发生很大的差异。海拔高度的改变,对气温、相对湿度,土温及土壤水分状况的影晌,也明显地反映在群落中各个种间的数量比例关系上。随着季节的更换,群落中的种类成分,表现出比较显著的季相演替关系。作者等曾作北坡群丛春、夏和秋三季季相的观察与纪录。

Since 1955 to date, we have been studying the various aspects of Longan (Euphoria longana) culture in Fukien province. [2,3] The present paper constituted a report of work done on the Longan orchard soil and its management of the following five main Longan pro-ducing districts namely, Tungan, Nanan, Chinchiang, Sian-yiu and Putien.

本文总结了福建东南部龙眼主产区的龙眼园土壤及土壤管理方法的研究结果。阐明了龙眼对闽东南滨海红壤丘陵的适应性;龙眼的生育状态和产量与土壤性质的关系;调查区龙眼园土壤管理体系的特征;讨论了龙眼丰产的土壤坏境;龙眼园土壤管理与其熟化特征的关系;提出调查区培育龙眼园土壤肥力的中心环节等问题。

In this paper a type of mossy forest that appears in the sclerophyllous evergreen broad-leaf forests is described. It was found by us in 1965 in the Sanyung mountain near Sanyingpan, the northern part of Luchuan district, Yunnan, occupying the altitude 2900-3100 m above sea level. The habitat that this vegetation occurs is a limestone mountain, where a mountainous cloudy belt is always around it, and below it in low altitude there is a canyon. Therefore, the habitat becomes so moist that has resulted in local...

In this paper a type of mossy forest that appears in the sclerophyllous evergreen broad-leaf forests is described. It was found by us in 1965 in the Sanyung mountain near Sanyingpan, the northern part of Luchuan district, Yunnan, occupying the altitude 2900-3100 m above sea level. The habitat that this vegetation occurs is a limestone mountain, where a mountainous cloudy belt is always around it, and below it in low altitude there is a canyon. Therefore, the habitat becomes so moist that has resulted in local climate and formed a modern environment for existence of this vegetation.

本文介绍一个出现于硬叶常绿阔叶林中的苔藓林。这是我们于1965年在云南禄劝县北部撒营盘附近撒永山海拔2900—3100米处发现的。植被所在地为石灰岩山地,绕山经常有一云雾带停留,山下低海拔有一峡谷。因此,生境湿润,致使形成局部气候,并成为此类植被存在的近代生境原因。 通过采用法—瑞地植物学派的研究方法,并与附近地区的群落类型进行比较分析,我们确定此类植被为一群丛,并定名为“黄背栎、云生兔儿风群丛”。综合了调查区的10个样地记录,排列成一个群丛表。表中包罗14种特征种和53种伴生种,它们是构成本群丛的基本植物。外来种55种另列一表(或种类名单)。 从形成历史原因看,本群丛是一类发源于第三纪的残遗植被,是由古地中海的亚热带植被经长期演变而来,并在新的生境下产生了新的适应。所以它应属于川西滇北一带普遍分布的硬叶常绿阔叶林的一个特殊类型。

 
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