应用生态学报2018，Vol.29Issue(3)：696-704,9.DOI:10.13287/j.1001-9332.201803.008
滇西北高原典型湿地湖滨带优势植物种子繁殖对增温的响应
Response of seed reproduction of two dominant lakeside species to experimental warming in a typical plateau wetland in Northwestern Yunnan Plateau,China
摘要
Abstract
Based on the forecasted warming scenarios by IPCC,we studied the impacts of warming(increased by 2.0 and 3.5 ℃) on seed reproduction of two lakeside dominant species (Schoenoplectus tabernaemontani and Sparganium stoloniferum) in a typical plateau wetland (Napahai) in Northwestern Yunnan,by using"open-top chamber"technique. The results showed that warming had significant effects on the seed setting rate of both species,though with interspecific variation. The seed setting rate of S. tabernaemontani was significantly increased under two warming treatments,while that of S. stoloniferum was significantly decreased under the 2.0 ℃ warming treatment and had no variation under the 3.5 ℃ warming treatment. Warming promoted the spike growth of both species. For S. tabernaemontani,under the warming of 2.0 and 3.5 ℃ treatments,the spike length was increased by 82.9％ and 89. 0％,the spikelet number was increased by 133. 3％ and150.0％,the biomass of each individual was increased by 10.1％ and 89.6％,and the rate between biomass of per plant panicle and total biomass was increased by 79.5％ and 409.3％,respectively. For S. stoloniferum,under the warming of 2.0 and 3.5 ℃ treatments,the spike length was increased increased by 878. 8％ and 1052. 6％,respectively. Warming significantly increased seed yield of both species. Under the warming of 2.0 and 3.5 ℃ treatments,the seed yield per panicle of S. tabernaemontani was increased by 33.7％ and 58.3％,respectively. For S. stoloniferum,the seed yield was increased by 3.4％ and 69.5％,respectively. Under the warming of 2.0 and 3.5 ℃ treatments,the seed length of S. tabernaemontani was increased by 5. 4％ and 6. 9％,and the seed length /width was increased by 9.1％ and 5.3％,respectively. Warming had no significant effects on the seed shape of S. stoloniferum. The maximum and minimum temperatures were dominant factors affecting seed reproductions of both species. The advance of growing season,the prolonging of nutrition growing period,and accumulation of organic matter induced by warming would provide sufficient nutrient and energy accumulation for the reproduction and development of plants,which would promote seed reproduction capability of both species under the warming conditions.关键词
滇西北高原/纳帕海湿地/大气增温/种子繁殖/适应Key words
Northwestern Yunnan Plateau/Napahai wetland/atmospheric warming/seed reproduction/adaptation引用本文复制引用
王志保,孙梅,刘振亚,张晓宁,王行,张贇,肖德荣..滇西北高原典型湿地湖滨带优势植物种子繁殖对增温的响应[J].应用生态学报,2018,29(3):696-704,9.基金项目
本文由国家自然科学基金项目(31370497,31500409,31760115)、云南省高原湿地创新团队项目(2012HC007)、云南省科技计划项目(2017FD103)和西南林业大学科技创新基金项目(C16056)资助 （31370497,31500409,31760115）
