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世界建筑导报 2012年第4期27卷 10-11页

作者： Richard Leplastier lovett bay PSA事务所

家：这里没有路,只有船。这是个水上社区。大概在1974年,独自一人静静地坐在这破败的甲板上。远望着海湾,风吹在水面上,微微荡漾,波光粼粼。砂洲–这一时间和潮汐的时钟,展示着完美的力量。思绪慢慢游荡开来。一条姜黄色的博德牧羊犬的... 详细信息

家：这里没有路,只有船。这是个水上社区。大概在1974年,独自一人静静地坐在这破败的甲板上。远望着海湾,风吹在水面上,微微荡漾,波光粼粼。砂洲–这一时间和潮汐的时钟,展示着完美的力量。思绪慢慢游荡开来。一条姜黄色的博德牧羊犬的突然出现,

关键词：土地牧羊犬水面

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维普期刊数据库

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Demography of the threatened endemic shrub, Arbutus pavarii,in the Al-Akhdar mountainous landscape of Libya

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Journal of Forestry Research 2016年第6期27卷 1295-1303页

作者： Hanan F.Kabiel Ahmad K.Hegazy Lesley lovett-Doust Saud L.Al-Rowaily Abd EI-Nasser El Borki Department of Botany and Microbiology Faculty of ScienceCairo University Giza 12613 Egypt Department of Biology and Chemistry Nipissing UniversityNorth Bay ON Canada Department of Plant Production College of Food and Agricultural Sciences King Saud University Riyadh SaudiArabia Department of Botany Faculty of Science University of Benghazi Benghazi Libya

We sampled twenty populations of the vulnera- ble endemic shrub or tree, Arbutus pavarii Pampan., at different elevations and aspects within the A1-Akhdar mountainous region of Libya. Our sampling sites were at elevations ranging from 285 to 738 m above sea level, and several different habitats： vallies （locally known as wadis）, north- and south-facing slopes, and mountaintops. All individuals within each quadrat were studied. Population size and structure, and plant functional traits were assessed. None of the populations had a stable distribution of size classes. Some consisted mostly of small plants, with little or no fruit production; others consisted only of mid-sized and large plants, with high fruit production, but no juvenile recruitment. There was a significant increase in percent cover with increasing elevation; reproductive output （the number of fruits per branch and total number of fruits per individual） also generally increased with elevation. In some of these populations the lack of recruitment, and in others the failure to produce fruit, together constituted serious demographic threats. In light of these results, recommen- dations are made for conservation of this vulnerable endemic species.

关键词： Al-Akhdar mountains Conservation Demography Elevation Functional traits Vulnerable species

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维普期刊数据库

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Plant communities and reproductive phenology in mountainous regions of northern Libya

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Journal of Forestry Research 2017年第4期28卷 741-761页

作者： Ahmad K. Hegazy Hanan F. Kabiel Saud L. Al-Rowaily Lesley lovett-Doust Abd El-Nasser S. Al Borki Department of Botany and Microbiology Faculty of ScienceCairo UniversityGiza 12613Egypt Department of Plant Production College of Food and Agricultural SciencesKing Saud UniversityRiyadhSaudi Arabia Department of Biology and Chemistry Nipissing UniversityNorth BayONCanada Department of Botany Faculty of Sciences and ArtsUniversity of BenghaziAgdabiaLibya

Within the semi-desert landscape of northern Libya, two sub-humid escarpments occur: Al-Akhdar in the east and Nafusa (Jabal Al-Gharbi) in the west. This study compares plant communities in the two regions, which are along an elevation gradient, in terms of species composition and diversity, frequency of different Raunkiaer life forms, and reproductive phenology. The two regions differed in species composition and life-form frequency between regions and between elevation zones within each region. Patterns were associated with the lower rainfall and lower moisture-holding capacity of soils at Nafusa, resulting in more xeric conditions. Only 13% of species were shared between the two regional landscapes. Species diversity, life-form frequency, and duration of the flowering-fruiting phenophase were all affected by elevation above sea level. The duration of flowering and fruiting in spring and fall was associated with environmental conditions, although there were different thresholds in the two regions. There was both a spring and fall episode of flowering at Nafusa, but only spring flowering at Al-Akhdar. It is anticipated that there will be a gradual shift of plant communities to higher elevations and loss of certain sensitive species in response to ongoing climate change.

关键词： Altitudinal gradient Raunkiaer life forms Reproductive phenology Southern Mediterranean

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