Structure, function and dynamics of transitions between plant communities

植物群落之间转变的结构、功能和动态

• 批准号: 262974-2009
• 负责人: Harper, Karen
• 金额: $ 1.38万
• 依托单位: Dalhousie University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=497520
• 关键词: Structure; function; dynamics; transitions; between

Boundary structure affects flows of energy, material and organisms across transitions between adjacent ecosystems on the landscape. Differences in the characteristics of edges including structue may depend on factors such as forest type or the type and age of edge. My research program includes studies on the structure, dynamics and function of natural forest edges. Research will be conducted near Churchill, Manitoba and in Cape Breton, Nova Scotia. My short term projects include a comparison of forest edges of different structure in different types of forest, an investigation of the process of deadwood decomposition at forest edges and the establishment of permanent plots to investigate temporal dynamics of boundaries. The proposed research will provide insight into how boundary structure affects patterns and processes at forest edges, evaluate older fire edges as a reservoir for deadwood on the landscape and initiate important long-term research on the temporal dynamics of natural boundaries. Results from these studies will contribute towards my long-term goal of developing an analytical model that predicts the effects of stand and landscape-level charactistics on boundary structure and function. An understanding of the landscape patterns and processes is important as a context within which to assess the impact of forest management practices, hydroelectric development and climate change. This knowledge will greatly advance the field of landscape ecology which currently lacks specific information on natural edges. Canada will benefit from a greater understanding of landscape patterns and processes in the boreal forest, especially as it relates to sustainable forest management and climate change.

边界结构影响着景观上相邻生态系统之间的能量、物质和生物的流动。包括结构在内的边缘特征的差异可能取决于诸如森林类型或边缘的类型和年龄等因素。我的研究项目包括天然林边缘的结构、动态和功能研究。研究将在马尼托巴省丘吉尔附近和新斯科舍省布雷顿角进行。我的短期项目包括在不同类型的森林中比较不同结构的森林边缘，调查森林边缘的朽木分解过程，以及建立永久性样地来研究边界的时间动态。该研究将深入了解边界结构如何影响森林边缘的格局和过程，评估老火缘作为景观枯木水库的作用，并对自然边界的时间动态进行重要的长期研究。这些研究的结果将有助于我的长期目标，即建立一个分析模型，预测林分和景观水平特征对边界结构和功能的影响。了解景观格局和进程是评估森林管理做法、水电开发和气候变化影响的重要背景。这些知识将极大地推动景观生态学领域的发展，该领域目前缺乏关于自然边缘的具体信息。加拿大将受益于对北方森林景观格局和进程的更深入了解，特别是因为它与可持续森林管理和气候变化有关。