• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Coexistence of two floating-leaved species, Nymphoides indica and Nymphoides cristata, and the role of seed banks in vegetation dynamics at the Keleodeo National Park wetlands, Bharatpur, India.
【24h】

Coexistence of two floating-leaved species, Nymphoides indica and Nymphoides cristata, and the role of seed banks in vegetation dynamics at the Keleodeo National Park wetlands, Bharatpur, India.

机译：印度印度巴拉特普尔的Keleodeo国家公园湿地中的两个浮叶物种共存，印度N和Nymphoides cristata，以及种子库在植被动态中的作用。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Life history characteristics of two floating-leaved species, Nymphoides cristata (Roxb.) O. Kuntze and N. indica (L.) O. Kuntze, were investigated. The purpose of the study was to determine why N. cristata is common in wetlands with an annual drawdown, and N. indica in permanently inundated wetlands. Life history characteristics were studied in the field and along a water gradient in a concrete tank. In a second study, 20 monsoonal wetlands were sampled for their seed banks and vegetation. These studies were conducted at the Keoladeo National Park, Bharatpur, India.;N. cristata is favored under drawdown conditions because of greater survival of its seedlings and its ability to regenerate from root fragments following flooding. N. cristata seedlings at the 1- and 2-leaf stage showed no mortality to a water depth of 140 cm, while those of N. indica had 20 to 100% mortality at water depths between 70 and 140 cm. In the field, 7% of N. cristata seedlings survived flooding versus 2% of N. indica seedlings. Adult plants of N. cristata regenerated from root fragments after a drawdown (29%), while no plants of N. indica regenerated from root fragments.;N. indica is favored under permanently inundated conditions because its response to herbivory, rate of clonal growth and growth responses allow it to persist and to colonize unoccupied space. On a per plant basis, vegetative reproduction was four time greater for N. indica than for N. cristata. Biomass allocation to leaves (42-46% vs 27-31%) and growth responses, including relative growth rate (0.0-31.4 vs 0.6-17.1 mg g;Seasonal composition of plant communities in monsoonal wetlands is regulated by a seed bank that is small (822 to 4,467 seed m
机译：调查了两个浮叶物种，Nymphoides cristata（Roxb。）O. Kuntze和N. indica（L.）O. Kuntze）的生活史特征。这项研究的目的是确定为什么在每年减少的湿地中出现猪瘟猪笼草，而在永久性淹没的湿地中为什么会出现in猪笼草。在田间和沿混凝土罐中的水梯度研究了生命历史特征。在第二项研究中，对20个季风湿地的种子库和植被进行了采样。这些研究是在印度巴拉特普尔的Keoladeo国家公园进行的。在垂降条件下，人们更喜欢使用cristata，因为其幼苗的存活率更高，并且洪水后能够从根部碎片中再生。在1叶和2叶阶段的水ist猪笼草幼苗在140厘米水深处没有死亡，而在水深70至140厘米时印度。猪幼苗的死亡率为20％至100％。在田间，7％的水芹可以存活，而2％的印度。可以存活。垂线虫（N. cristata）的成年植株在滴水后从根片段再生（29％），而没有N稻（N. indica）植物从根片段再生。由于permanently草对草食动物的反应，克隆生长的速率和生长反应使它能够持续存在并在无人居住的空间定居，因此is草在永久性淹没条件下受到青睐。在每株植物的基础上，印度N的营养繁殖比克里斯塔猪笼草的营养繁殖大四倍。叶片的生物量分配（42-46％对27-31％）和生长响应，包括相对生长率（0.0-31.4对0.6-17.1 mg g;季风湿地植物群落的季节性组成受种子库的调节小（822至4,467种子m

著录项

  • 作者

    Mason, Daniel Harry.;

  • 作者单位

    Iowa State University.;

  • 授予单位 Iowa State University.;
  • 学科 Botany.;Ecology.
  • 学位 Ph.D.
  • 年度 1996
  • 页码 105 p.
  • 总页数 105
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号