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当前位置: 首页 > 文章 > 青藏高原东缘亚高寒草甸植物叶性状对微生境变化的响应 应用生态学报 2017,28 (1) 71-79
Position: Home > Articles > Response of plant leaf traits to microhabitat change in a subalpine meadow on the eastern edge of Qinghai-Tibetan Plateau,China Chinese Journal of Applied Ecology 2017,28 (1) 71-79

青藏高原东缘亚高寒草甸植物叶性状对微生境变化的响应

作  者：
侯媛;刘旻霞;孙辉荣
单  位：
西北师范大学地理与环境科学学院
关键词：
亚高寒草甸;植物叶性状;微生境;光合生理特征;坡向
摘  要：
研究甘南亚高寒草甸5个不同坡向植物叶性状对微生境变化的响应.结果表明:阳坡、半阳坡、西坡、半阴坡、阴坡植物种分别为25、36、42、47、49种.土壤水分、土壤养分、土壤温度、光照度、pH值在各坡向间差异显著.半阴坡的土壤水分含量最高;阳坡照度最大,日均土壤温度最大,土壤pH值最大.比叶面积、叶干物质量、叶片含水量、净光合速率、蒸腾速率、水分利用效率在各坡向间差异显著,表明植物在微生境中的光合策略不同.矮嵩草和蒲公英为阳坡优势种,矮嵩草、蒲公英、少花米口袋、圆穗蓼为半阳坡与西坡的优势种,金露梅、圆穗蓼、狼毒为半阴坡与阴坡的优势种.生境的优劣导致阳坡生物量低、半阴坡生物量高,但两者的多样性和丰富度均较低;西坡生物量为中等水平且多样性和丰富度最高.
译  名：
Response of plant leaf traits to microhabitat change in a subalpine meadow on the eastern edge of Qinghai-Tibetan Plateau,China
作  者：
HOU Yuan;LIU Min-xia;SUN Hui-rong;College of Geography and Environment Science,Northwest Normal University;
关键词：
subalpine meadow;;plant leaf trait;;microhabitat;;photosynthetic physiological characteristics;;slope aspect
摘  要：
The response of plant leaf traits in five different slope aspects to microhabitat changes was studied on subalpine meadow in Gannan. The number of plant species was 25,36,42,47 and 49 in the sunny slope,half-sunny slope,west slope,half-negative slope and shady slope,respectively. Soil water content,soil nutrients,soil temperature,illumination and soil p H were significantly different among the different slope aspects. Soil water content had the maximum value in the halfshady slope,and daylight illumination,daily soil temperature and soil p H had the maximum value in the sunny slope. Specific leaf area,leaf dry matter,leaf water content,net photosynthetic rate,transpiration rate and water use efficiency were significantly different among the different slope aspects,indicating plant photosynthesis strategy was different in the different microhabitats. Kobresia humilis and Taraxacum mongolicum were dominant species in the sunny slope. Kobresia humilis,Taraxacum mongolicum,Gueldenstaedtia verna and Polygonum macrophyllum were dominant species in the half-sunny slope and west slope. Potentilla fruticosa,Polygonum macrophyllum and Stellera chamaejasme were dominant species in the half-shady slope and shady slope. Habitat quality led to low biomass in the sunny slope and high biomass in the half-shady slope. Biodiversity and abundance were relatively low in the sunny slope and half-shady slope. Biomass was medium,and biodiversity and abundance were the highest in the west slope.

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