昆虫

五大连池老黑山和火烧山两座新期火山被计划为猎奇目标。进入老黑山脚下,对山下零星的植物与地面进行仔细搜索没有找到什么新奇的昆虫。裸露的熔岩上几只直翅目蝗虫蹦蹦跳跳地活动着．大致能看到它们的落点却又不见踪影。仔细寻找,原来它们有很好的保护色．周身深灰黑色．与熔岩石极其相似真的让人很难想象．它们是通过什么样     

西藏苔藓新植物

本种与多蒴异齿藓R．orthostegius相似,但区别为蒴柄平滑,叶边有单细胞锐齿,中肋达于叶尖稍下处终止。     

这里有一方神奇之水

一道奇特的风景线 冬日的五大连池被茫茫冰雪包裹得严严实实心目中14座火山锥和五池碧水的壮观景象已被眼前的白色取代．天地一色树木、公路．就连老百姓的房顶也被单调的白色笼罩着,别样的心情别样的感受．我努力搜寻着别样的色彩…     

污损生物苔藓虫类新纪录

国家自然科学研究基金项目中,在进行浙江舟山群岛嵊泗列岛污损生物时注意三角藤壶、海葵等外,以苔藓虫类很显著,属外肛动物门(Ectoprocta)裸唇纲(Gymnolaemata),有40种,其中4种是中国新纪录,今将4种的形态特征、采集地及地理分布并附图记述之。1角形单节苔虫Crisidia cornuta geniculata Milne-Edwards(图,1)1.1形态特征群体树枝状,长在岩石等上,每一节间部只一个虫。个虫细管形,长0.27—0.36毫米,宽0.03毫米。初长一个虫,继生左右二个虫,再同式繁生。室口圆形,与个虫同宽。个虫表面散布细孔。该种属于节苔虫科(Crisiidae)。1.2采集地浙…     

五大连池火山会不会再次爆发

五大连池二百多年前的火山爆发说明,地下的岩浆还在活动,时机成熟,它会选择适当的地方喷溢出来。但是它的喷发方式不会造成大的危险,不必惊慌恐惧。     

把五大连池还给世界

在中国的北方,有一个以世界著名火山和矿泉水著称的地方——五大连池。2003年她被联合国教科文组织批准为世界生物圈保护区。2004年被联合国教科文组织批准为世界地质公园。同时地还是国家首批重点风景名胜区,中国旅游胜地四十佳．中国惟一的矿泉水之乡国家级自然保护区,国家地质公园。     

贵州梵净山山顶苔藓矮林初步研究

 梵净山山顶苔藓矮林具有下述特点：1．根据其分布高度,区系组成,常绿树种和落叶树种的比例、重要值,生活型谱,可认为它是常绿落叶阔叶混交林的变型,是一种地形顶极群落。2.其特点是：林木矮小,分枝低,主干不明显,枝干多弯曲,树冠平伏紧密,生长缓慢,林内苔藓植物发达,种类组成贫乏,层次简单,藤本植物稀少。3．用极点排序法可把它们分成六个类型,即杜鹃槭树矮林、山樱山矾矮林、械树矮林、黔稠矮林、花楸杜鹃矮林和黄杨矮林。4．其更新特点是萌蘖占有重要地位,种子更新能力较弱,两者互相补充保证了矮林能自我更新,成为稳定的群落。5．梵净山山顶苔藓矮林经营的方向是认真保护。     

五大连池新期火山的植被类型及群落特征的研究

五大连池新期火山的植被类型及群落特征的研究潘林刘士山吕洪彦（黑龙江省克山师范专科学校生物系克山１６１６０１）１引言五大连池为国家级自然保护区之一［１］,该地区共有十四座火山,其中老黑山和火烧山为新期火山,有东北地区独一无二的火山“自然博物馆”之称,其...     

游在五大连池

行黑龙江省会城市哈尔滨距五大连池风景区384公里,公路为202国道,夏季客运汽车,哈尔滨每天早七点、十二点三十分均有发往五大连池风景区的金龙、亚星客车,历时4小时30分。也可从黑龙江北安前往,北安距五大连池风景区62公里,全天候往返客运50分钟即达。 五大连池风景区距国家一类边境开放口岸黑河市270公里,有高等级公路相连(202国道),3小时30分即到五大连池风景区。     

Himalayan Moss Notes

Abstract

Studies of the relative and absolute lengths of mitotic chromosomes show that Pellia endiviifolia is cytologically distinct from the species P. megaspora, P. epiphylla and P. neesiana. This supports the recognition, on morphological grounds, of P. megaspora as a species distinct from P. endiviifolia.     

Determination of Prenylquinones in Green Photosynthetically Active Moss and Liver Moss Tissues

The prenylquinone composition of two species of mosses (Polytrichum formosum Hedw., Sphagnum acutifolium Ehrh.) and two species of liver mosses (Lunularia cruciata (L.) Dum., Pellia epiphylla (L.) Cord.) was determined and compared with the chlorophyll content and the photosynthetic activity of the intact moss and liver moss tissues.

• 1 Green moss and liver moss tissues possess in principle the same prenylquinone composition as higher plants with plastoquinone-9, α-tocopherol, α-tocoquinone and the phylloquinone K₁ as main components. On a chlorophyll basis the lipoquinone levels are lower than in higher plants. Differences among the individual mosses as well as within one species only occur in the quantitative levels of the chloroplast prenylquinones, but there are no differences between musci and liver mosses.
• 2 There are differences in the maximal fluorescence of liver mosses and mosses. The variable fluorescence in turn, which is a measure of in vivo photosynthetic activity, is very similar for all examined species of mosses and liver mosses (values from 0.7 to 1.0) but somewhat lower than in leaf pieces of higher plants. DCMU blocks the variable fluorescence and the concomitant oxygen evolution in all mosses and liver mosses.
• 3 From the lower prenylquinone levels and the low values for the variable fluorescence it is concluded that mosses and liver mosses exhibit on a chlorophyll basis fewer reaction centres and electron transport chains than chloroplasts of higher plants.

     

Studies on Moss Spores

At the beginning of germination in Polytrichum commune sporesa clear lag phase is observed in the synthesis of chlorophylls.This synthesis apparently does not start until chloroplast replicationbegins, being correlated with the increase of the number ofchloroplasts. The chlorophyll a to b ratio is 1.7 in the dryspores and it does not vary much during germination.