高海拔松树的复林:直接播种的成功取决于种子来源和播种环境
Lacey E Hankin1,2, Elizabeth A Leger2,3, Sarah M Bisbing1,2
1Department of Natural Resources and Environmental Science, University of Nevada Reno, Reno, Nevada, USA.
概括
气候变化威胁着森林. 再造林工作可以通过选择来自干旱地区的种子来源来增强树木的持久性,从而促进干旱抵抗力和木苗的存活,这些物种包括性松树,毛刺松树和白皮松树.
科学领域:
- 生态生态学 生态生态学
- 气候变化生物学 气候变化生物学
- 林业 林业 林业 林业 林业
背景情况:
- 森林在气候变化下的持久性需要物种适应或迁移.
- 复林对于长寿,孤立的树种,以及面临快速气候变化的树种至关重要.
- 识别适应气候的种子来源对于成功的复林至关重要.
研究的目的:
- 为了评估三个高海拔的五针松树的苗木出现和性能变化.
- 评估功能特征如何在不同的企业条件下影响业绩.
- 确定特征和性能变化是否表明局部适应性和可塑性.
主要方法:
- 一个互惠领域的共同花园实验与温室共同花园研究相结合.
- 种苗出现的量化,功能特征和性能指标.
- 分析特征环境关系以推断局部适应.
主要成果:
- 土壤湿度显著推动了种苗的出现和所有物种的丰富性.
- 林柏松表现出浮现优势和干旱适应性特征; 毛刺松表现出低浮现但高早期生存率.
- 在干旱相关的特征中有一些地方适应的证据,但不是在出现或早期生存方面.
结论:
- 从更干燥的环境中采购种子,可以在复林工作中增强抗旱能力.
- 选择合适的种子来源可能会改善早期幼苗的生存.
- 成功的复林取决于合适的建立环境和考虑气候变化.
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