共查询到20条相似文献，搜索用时 93 毫秒
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浅谈我国红树林湿地生态系统 总被引：1，自引：0，他引：1
红树林是湿地生态系统类型之一，全球红树林湿地面积的急剧缩小引起了人们对红树林湿地生态重要性的关注，同时也加大了对红树林的研究和保护。本文从我国红树植物和半红树植物的种类和分布、红树林生境的特殊性和适应性、红树林的生态价值等方面，阐述了我国红树林湿地生态系统的概况。 相似文献
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王锋印 《泉州师范学院学报》2001,19(2):40-44
泉州市海域辽阔，海岸线长，海岸带开发在泉州占有极其重要的地位，本从海岸带综合开发角度，分析泉州市海岸带开发态势与存在主的主要问题，探讨海岸带可持续发展的对策，供决策参考。 相似文献
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依托湛江红树林乡土生物资源创设生态大课堂,引导学生走进红树林湿地,通过观察体验红树林独特的生态系统、开展红树林湿地生物多样性探究实践调查、参与宣传保护红树林活动等方式,把立德树人落到实处,为生物学学科核心素养在野外实践活动中落地探索了经验,为教师在学科核心素养背景下开展生物学野外实践教学活动提供参考。 相似文献
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东寨港国家级自然保护区水污染生物检测 总被引：1，自引：0，他引：1
于2003年8月对海南东寨港国家级红树林自然保护区水污染状况进行了初步调查和分析．结果表明，罗牛山养猪场排污水为东寨港红树林自然保护区的水污染主要来源；对保护区内不同时期不同水域水样水污染生物学检测表明，罗牛河水体污染严重，而红树林湿地生态系统具有较强的污染后恢复的能力，因而影响相对较小；同时针对红树林保护区存在的问题提出了相关管理对策。 相似文献
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海洋自然保护区是指为保护海洋自然资源和环境，在海域、海岛、海岸带以及河口区划出一定范围，加以保护的区域。 相似文献
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对福建、广东和广西等省区受到互花米草入侵的有代表性的红树林湿地进行实地调查.调查结果发现:互花米草主要以带状或斑块状分布在红树林的前缘;在红树林内,主要呈斑块状分布于红树林林间空隙处;在红树林密集的地方则难以侵入.互花米草与红树植物存在生态位的重叠,与红树植物竞争阳光和生长空间,容易对周围低矮的红树植物形成遮荫,特别是对红树林幼苗的生长带来不利影响.建议采用本土红树植物科学地营造红树林,以较快形成较高的郁闭度,达到防治互花米草的目的. 相似文献
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黄河三角洲海岸带高效生态农业发展模式及建议 总被引：1，自引：0，他引：1
简要分析了黄河三角洲海岸带的特点与面临的主要问题,构建了海岸带发展高效生态农业的暗管排碱模式、高效生态种植模式、农林牧复合型高效生态模式、高效生态牧畜业模式、高效生态渔业模式、高效生态设施农业模式、观光休闲型高效生态农业模式、种养加和贸工农一体化复合模式、生物修复与重建型模式计9类模式,并提出了海岸带开发利用的4条建议,以供政府和有关部门参考. 相似文献
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西洞庭湖湿地保护与开发利用调研报告 总被引：1，自引：0，他引：1
西洞庭湖是整个洞庭湖不可分割的重要组成部分,其湿地资源十分丰富,历年来一直是人们高强度开发的区域.西洞庭湖自然保护区在湿地保护和管理方面采取了开展退田还湖恢复湿地示范项目、加强湿地保护宣传教育、强化湿地保护管理职能、严厉打击野生动物违法犯罪行为、对湿地资源进行动态监测,并与当地渔民一起对湿地资源进行社区共管,开展有机渔业生产、发展生态旅游、合理利用湿地资源等保护管理模式,使西洞庭湖湿地生态系统得到了较好的恢复与保护. 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 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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唐芳 《读与写:教育教学刊》2008,5(6)
During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context. 相似文献