共查询到20条相似文献，搜索用时 984 毫秒
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沈琪 《浙江教育学院学报》2007,(6):105-109
采用实地调查和区系分析的方法研究了绍兴镜湖湿地的维管植物多样性.调查表明该地共有维管植物359种,物种多样性较为丰富,这与该地处于亚热带以及人为影响有关.该地的湿地植物有187种,占物种总体比例较低(52.1%),建议在今后的修复和建设中应多培育湿地环境和湿地植物. 相似文献
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为了解玉环漩门湾国家湿地公园的建设成效,通过总结分析该湿地公园的湿地资源现状,对其保护情况和面临的问题等进行了探讨。该湿地公园总面积为31.48 km2,湿地率达76.49%,共有4大类9个湿地型。包括浮游植物29种,维管植物547种,国家二级重点保护野生植物4种;植被结构可划分为2个植被型组3个植被型16个群系;浮游动物21种,底栖动物80种,鱼类106种,两栖动物12种,爬行动物16种,鸟类230种,哺乳动物13种;国家一级和二级重点保护野生动物分别为10种和48种。湿地水文景观和生物景观独特,具有重要的生态价值。本文的相关结果可为该湿地公园的后续建设和管理提供依据,也可为其他湿地公园的建设和发展提供参考。 相似文献
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《佳木斯教育学院学报》2015,(7)
目前在我们国家现有的城市湿地公园很多,不同的湿地公园有着自己不同的特点,这就决定了目前城市湿地公园植物种植设计的复杂性与多变性,由于湿地公园设计在我国起步比较晚,而湿地公园中植物景观规划设计的发展更是相对落后,仍然处于探索阶段。但是植物设计在整个湿地公园设计中又占了相当大的比重,起着至关重要的作用,因此这就要求我们必须要展开这方面的研究。随着现代社会人们对环境的高度重视,植物设计也越来越重要同时在教育教学中的地位也在不断的上升,本文通过对激发城市湿地公园植物设计学习兴趣的研究,提出了几点自己的观点,为大家提供一些参考。 相似文献
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豫东黄河故道湿地维管植物资源调查 总被引：2，自引：1，他引：2
王保业 《商丘职业技术学院学报》2003,2(3):50-52
采取样方调查结合普查的方法 ,对豫东黄河故道湿地的维管植物资源进行了调查 .通过调查发现共有维管植物 71科3 43种 ,并对其分类、分布等情况进行了分析总结 . 相似文献
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目的:通过对安徽省三汊河国家湿地公园轮虫群落特征进行研究,为当地生态文明建设提供科学的依据。方法:分别于2016年7月、10月和12月共3个水情期(即丰水期、平水期和枯水期),对三汊河国家湿地公园的轮虫群落结构特征进行调查。结果:共鉴定出轮虫7科24种,其中臂尾轮科13种,为该湿地公园的优势类群,萼花臂尾轮虫和多枝轮虫为该湿地公园的主要优势种。研究区轮虫总丰度变化范围为38.6 ind./L~1 984.8 ind./L,其中丰水期最高,枯水期最低。通过对轮虫多样性进行分析,ShannonWiener指数和Margalef指数的变化范围分别为1.68~2.85和1.76~3.02。结论:三汊河国家湿地公园水体污染程度总体处于寡污染至中污染之间。 相似文献
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马峦山郊野公园的植物资源及其可持续利用 总被引：1，自引：0，他引：1
马峦山郊野公园共有维管植物161科561属1048种,其中野生维管植物153科517属967种,包括蕨类植物22科35属60种;裸子植物4科4属6种;被子植物127科478属901种。对资源植物的分析表明,材用、食用、药用、淀粉、油脂、芳香、鞣料、纤维、观赏、染料、饲料等均十分丰富,蕴藏着巨大的经济和生态价值。 相似文献
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《南阳师范学院学报》2022,(3):34-38
对南阳市城区蒿属植物资源的多样性和分布进行调查,并对部分蒿属植物的叶表皮特征进行比较.结果表明：(1)南阳市白河湿地公园、梅城公园、人民公园、南阳师范学院和南阳医学高等专科学校区域共有6种野生蒿属植物分布,分别是蒙古蒿、野艾蒿、南毛蒿、艾、黄花蒿和矮蒿,其中以野艾蒿、黄花蒿和蒙古蒿分布较多,南毛蒿局部零星分布.(2)对野艾蒿、艾、蒙古蒿、南毛蒿4种蒿属植物的叶形态特征比较分析,发现4种蒿属植物叶上下表皮细胞主要为多边形和不规则形,气孔器主要分布在下表皮,垂周壁式样有波浪状、平直、波纹状三种类型,下表皮毛存在差异. 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
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Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities. 相似文献
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RUZBEHANI Mohsen 《重庆大学学报(英文版)》2004,3(1):20-25
1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec… 相似文献
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Rajesh Kanoi 《海外英语》2007,(1):52
Today, Sunday morning, I sit thinking and typing at my computer. My thoughts are in my homeland, India and my body is in China. The body is here and mind there for a good reason. Mr. Hu is president and I am resident and both are in each other's countries (what a difference the absence of one small letter makes!). Mr. Hu will return in a few days and I will stay on longer. 相似文献
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正A One day a pig went to the stable(马棚)to see his good friend,an oldhorse,and was going to stay there forthenight.Night came and it was time forsleep.The pig went into the straw heap(稻草堆)and lay comfortably.A longtime passed,but the horse was stillstanding there and did not move.Thepig asked the horse why he did not go tosleep."Standing like this is the begin-ning ofsleeping,"answered the horse. 相似文献
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《今日中学生》2014,(9)
正1.Any fool can count the seeds in an apple.Only God can count all the apples in one seed.2.Happy families are all alike;every unhappy family is unhappy in its own way.3.Memories are the key not to the past,but to the future.4.Sometimes in the dark you see what you want to see.5.There is a great difference between 相似文献
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《重庆大学学报(英文版)》2014,(2)
正Scope and Policy The Journal of Chongqing University-English Edition(JCQU-E)is a peerreviewed journal publishing research articles in multiple disciplines of science and technology,covering civil and environmental engineering,chemical engineering,biotechnology,mechanical and electrical engineering,computer and data processing,mining,metallurgy,materials science,and interdisciplines thereof. 相似文献