[1] Slade A J, Hutchings M J. The effects of nutrient availability on foraging in the clonal herb Glechoma hederacea[J]. Journal of Ecology,1987,75(1):95-112 [2] Brown J H, Whithmu T G, M Ernest S K. Complex species interactions and the dynamics of ecological systems: Long-term experiments[J]. Science,2001,293(5530):643-650 [3] Huber H. Architectural plasticity of stoloniferous and erect herbs in response to light climate[D]. Utrecht, Netherlands: Utrecht University,1997:100-105 [4] 国振杰,易津,张力君.海拔高度对羊草生物量和根茎形态可塑性的影响[J].干旱区资源与环境,2008,22(4):175-180 [5] Vickery P J. Grazing and net primary production of a temperate grassland [J]. Journal of Applied Ecology,1992,9(1):307-314 [6] Belsky A J.Does herbivory benefit plants? A review of the evidence[J]. American Naturalist,1986,127(6):870-892 [7] Hidayati S N, Walck J L.Contrasting seed germination patterns for intracontinental disjuncts of Heuchera (Saxifragaceae) in North America: the eastern temperate H. parviflora and western montane H. cylindrica [J]. Canadian Journal of Botany,2002,80(11):1185-1192 [8] 刘志民,赵晓英,刘新民.干扰与植被的关系[J].草业学报,2002,11(4):1-9 [9] 王仁忠.放牧影响下羊草种群生物量形成动态的研究应用[J].应用生态学报,1997,8(5):505-509 [10] 李建东.我国的羊草草原[J].吉林师范大学学报,1978(1):145-159 [11] Abulfatih H A, Bazzaz F A.The biology of Ambrosia trifida L. IV. Demography of plants and leaves [J].New Phytologist,1980,84(1):107-110 [12] 郭继勋,祝廷成.气候因子对东北羊草草原羊草群落产量影响的分析[J].植物学报,1994,36(10):790-796 [13] 王玉辉,何兴元,周广胜.放牧强度对羊草草原的影响[J].草地学报,2002,10(1):45-49 [14] 刘颖,王德利,王旭,等.放牧强度对羊草草地植被特征的影响[J].草业学报,2002,11(2):22-28 [15] 张慧荣,杨持.不同生境条件下羊草种群构件的可塑性变化[J].内蒙古大学学报:自然科学版,2008,39(3):321-324 [16] 赵威,林光辉,韩兴国.羊草对过度放牧和刈割的生理生态响应[D].北京:中国科学院植物研究所,2006:1-2 [17] 杨允菲,李建东. 松嫩平原人工草地羊草和野大麦叶种群的趋同生长格局[J].草业学报,2003,12(5):38-43 [18] 李丽丽,王德力.中国东北样带长期放牧干扰下羊草种群表型可塑性及遗传多态性的初步研究[D].长春:东北师范大学,2010:36-37 [19] 邵新庆,石永红,韩建国,等.典型草原自然演替过程中土壤理化性质动态变化[J].草地学报,2008,16(6):567-571 [20] 沙磊,王堃.羊草对长期过度放牧的形态及其内源激素响应[D].北京:中国农业大学,2007:33-34 [21] Wang Yu-tong, Deng Bo, Wang Kun, et al. Responses of plant morphology and seed quality to long-term overgrazing in Leymus chinensis[J]. African Journal of Biotechnology,2011,10(80):18403-18408 [22] 王炜,梁存柱,刘钟龄. 草原群落退化与恢复演替中的植物个体行为分析[J].植物生态学报,2000,24(3):268-274 [23] 杜鹃,王德利. 羊草种群对放牧的表型可塑性研究[D].长春:东北师范大学,2004:27-28 |