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Tree seedling growth, survival and morphology in response to landscape-level variation in soil resource availability.

机译:树木幼苗生长,存活和形态对土壤资源可利用性景观水平变化的响应。

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摘要

In the northern lower peninsula of Michigan, landscape-level variation in tree species composition is associated with glacial landforms which represent an increasing gradient of soil nutrient and water availability (i.e. outwash ice contact moraine). To investigate causes species associations, we conducted a reciprocal seedling transplant experiment using Acer saccharum, Fraxinus americana, Quercus alba, Prunus serotina and Q. velutina. Fertilizer additions of calcium and nitrogen were included to test for limitation of these nutrients. One year after transplanting, for seedlings grown in higher light plots, a trade-off was found between survival on outwash (poorer soil resource site) and relative growth rate (RGR) on moraine (richer soil resource site). Our results suggest this trade-off may be underpinned by variation in size and morphology among species. At low light, a trade-off between tolerance to ice-contact and growth on moraine was not supported by our results. Fertilizer additions were not found to effect survival or growth.
机译:在密歇根州北部下部半岛,树木物种组成的景观水平变化与冰川地貌有关,冰川地貌代表着土壤养分和水利用率的梯度增加(即冲刷<冰接触<冰ora)。为了调查原因物种之间的关联,我们进行了互惠的幼苗移植实验,使用的是 Acer saccharum,Afraxinus,Quercus alba,Prunus serotina velutina 。包括钙和氮的肥料添加以测试这些营养素的限制。移栽一年后,对于在较高光照条件下生长的幼苗,需要在水洗(土壤资源较差的地方)的存活率与冰ora(土壤资源较丰富的地方)的相对生长率(RGR)之间进行权衡。我们的研究结果表明,这种权衡可能是由于物种之间大小和形态的变化所致。在弱光下,我们的结果不支持在冰接触的耐受性与冰m生长之间进行权衡。未发现添加肥料会影响存活或生长。

著录项

  • 作者

    Schreeg, Laura Ann.;

  • 作者单位

    Michigan State University.;

  • 授予单位 Michigan State University.;
  • 学科 Biology Ecology.; Agriculture Forestry and Wildlife.
  • 学位 M.S.
  • 年度 2002
  • 页码 72 p.
  • 总页数 72
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 生态学(生物生态学);森林生物学;
  • 关键词

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