共查询到20条相似文献,搜索用时 31 毫秒
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西双版纳是世界生物学多样性保护的关键和热点地区,倍受国际学术界的关注。笔者依据30多年来对西双版纳植被的调查,结合植物群落生态学与植物区系地理学研究,并参考世界类似热带植被的研究成果,对西双版纳植被的分类、物种组成、群落生态表现和植物区系特征等作了系统探讨,还进一步分析比较了其与世界类似热带森林植被的关系。结果显示,西双版纳的森林植被共包括32个较为典型的群系,且分属于7个主要的植被型,即热带雨林、热带季节性湿润林、热带季雨林、热带山地(低山)常绿阔叶林、热带棕榈林、暖热性针叶林和竹林。本文对西双版纳植被进行的全面记录和系统归纳,可为科学研究、生物多样性保护和自然保护区的管理提供参考。 相似文献
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J. F. Jenkin 《Polar Biology》1997,18(4):260-272
The McDonald Islands (53°03′S, 72°36′E) are situated in the southern Indian Ocean, approximately 43 km west of Heard Island. These sub-Antarctic islands comprise
McDonald Island itself, measuring ca.1 × 2 km, and two much smaller rocky outcrops, Flat Island and Meyer Rock. Five species
of vascular plant occur on the islands. Only four species of moss were found, no hepatics, and eight species of lichen, together
with algal and fungal species. Phanerogamic vegetation, comprising grassland and cushion-carpet herbfield, covers about one-third
of the main island. Elsewhere, vegetation is absent or restricted to cryptogamic species. The distribution and occurrence
of vegetation are strongly influenced by salt deposition, exposure to wind, substrate stability and biotic influences, particularly
the very large assemblages of sea birds. The species-depauperate McDonald Islands are unique and have suffered negligible
human impact. A management plan has been prepared; its implementation will be assisted by the information in this paper. The
islands' protection will be further enhanced by an affirmative final decision on the current proposal for World Heritage Listing
of Heard and the McDonald Islands.
Received: 15 November 1996 / Accepted: 24 March 1997 相似文献
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Ikram Ilahi Chaudhri 《Plant Ecology》1961,10(3-4):229-246
Summary The vegetation of Greater Karachi can be divided into three edaphic types.The coastal vegetation consists of three main associations. In the protected creeks facing the mouth of the rivers in shallow water is found mangrove vegetation consisting of mainly Avicennia alba
Blume. In the muddy coastal swamps Arthroenemum indicum
Moq is the main species. On the coastal sand dunes the main species consist of Suaeda monoica
Forsk, Ipomaea pes-caprae
Roth, Aerua pseudo-tomentosa
Blatt and Hall, Calotropis procera
Br. and Tamarix troupii, Hole.The vegetation of the calcarious rocks consists of mainly Commiphora mukul
Engl., Grewia villosa
Willd., Grewia tenax (Forsk) Boiss., Euphorbia caudicifolia
Haines and Acacia senegal
Willd.In the valleys between the hills where alluvium has been deposited over the basic rock by various rivers, the vegetation consists of Capparis decidua (Forsk) Edgew, Prosopis spicigera L. and Salvadora oleoides
Dcne.
Résumé La végétation de la région de Karachi peut être divisée en trois types trés différents au point de vue édaphique.La végétation littorale se compose de trois associations principales. Dans les criques protégées, en face des embouchures des fleuves, la végétation de la mangrove s'avance dans l'eau peu profonde. Elle consiste principalement d'Avicennia alba Blume. Dans les marais tourbeux du littoral, Arthrocnemum indicum Moq. occupe la première place. Sur les dunes littorales, les espèces principales sont Suaeda monoica Forsk, Ipomaea pes-caprae Roth., Aerua pseudo-tomentosa Blatt et Hall, Calotropis procera Br. et Tamarix troupii Hole.La végétation des rochers calcaires se compose principalement de Commiphora mukul Engl., Grewia villosa Willd., Grewia tenax (Forsk) Boiss., Euphorbia caudicifolia Haines et Acacia senegal Willd.Sur les alluvions des fleuves on note une végétation comprenant Capparis decidua (Forsk) Edgew, Prosopis spicigera L. et Salvadora oleoides Dcne.La végétation climax de la région est dominée par Salvadora oleoides Dcne et Prosopis spicigera L.相似文献
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Josef Schmithüsen 《Plant Ecology》1970,20(1-4):210-213
Ohne ZusammenfassungVortrag in der Sendereihe Unsere Erde des Österreichischen Rundfunks am 10-3-1969. 相似文献
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