Structural diversity across transitions in heterogeneous landscapes
异质景观转型中的结构多样性
基本信息
- 批准号:RGPIN-2014-06009
- 负责人:
- 金额:$ 1.75万
- 依托单位:
- 依托单位国家:加拿大
- 项目类别:Discovery Grants Program - Individual
- 财政年份:2015
- 资助国家:加拿大
- 起止时间:2015-01-01 至 2016-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Transitions or boundaries between adjacent plant communities are important features of landscapes that might harbour greater diversity. Natural forest edges are less studied than those created by human activity but are more complex. Researchers have been working towards developing a theory of transitions, but many elements are still missing including a model that can predict patterns of vegetation across different types of edges as well as an understanding of edges within forested landscapes. I use an approach in my research which combines a focus on vegetation across natural forest edges with a more extensive exploration of vegetation patterns across the landscape. I pursue new methods including measuring structural diversity which combines the number and abundance of different structural elements (trees, dead trees, logs) and types of vegetation (tall shrubs, moss, lichens). I expect transitions to have the highest structural diversity on the landscape because they: 1) contain structural elements from both communities, 2) experience more tree mortality from disturbance such as flooding at lake edges and burning at fire edges, and 3) are influenced by increased light and wind at edges which result in changes in structure (more logs and saplings as trees regenerate). Variation in structural diversity across landscapes could affect patterns of fire, animal movement and habitat availability for smaller organisms. My long term objectives are: A) to predict patterns of vegetation across different types of edges in different forests; and B) to determine patterns of structural diversity across transitions in forested landscapes. My students and I will pursue three short-term objectives: 1) We will compare the patterns of vegetation structure at coastal forest edges. We will estimate the width of the transition zone which we will relate to distance from the ocean, elevation and width of adjacent barrens (treeless vegetation). 2) We will determine patterns of structural diversity across transitions from four different landscapes: wetland-forest and clearcut-forest transitions in southwestern Nova Scotia, and spruce budworm disturbed area-forest and barrens-forest transitions in Cape Breton. We will use long transects and spatial analysis to compare structural diversity between transition and non-transition parts of the landscape. 3) We will compare vegetation at landscape transitions with different levels of structural diversity. Results from objective 1 will contribute towards my long-term goal of developing a predictive model, a useful tool in conservation, climate change research and landscape ecology. Estimating and predicting transition widths is important for understanding effects of different management activities for conservation and for predicting effects of climate change. Structural diversity has the potential to become an important tool to facilitate comparisons among landscapes with different species, particularly in Canada where plant species diversity is generally low. Mapping landscape patterns of structural diversity would be helpful for assessing fuel availability for fire management and habitat availability for conservation. 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 its forests, especially as it relates to sustainable forest management and climate change.
相邻植物群落之间的过渡或边界是可能具有更大多样性的景观的重要特征。自然森林的边缘比人类活动造成的边缘研究得少,但更为复杂。研究人员一直在努力开发一种过渡理论,但仍然缺少许多元素,包括可以预测不同类型边缘的植被模式以及对森林景观边缘的理解的模型。我在研究中使用了一种方法,它将对自然森林边缘植被的关注与对整个景观植被模式的更广泛探索相结合。我追求新方法,包括测量结构多样性,它结合了不同结构要素(树木、枯树、原木)和植被类型(高灌木、苔藓、地衣)的数量和丰度。我希望过渡在景观上具有最高的结构多样性,因为它们:1)包含来自两个社区的结构元素,2)由于湖泊边缘的洪水和火灾边缘的燃烧等干扰而经历更多的树木死亡率,3)受到边缘增加的光线和风的影响,导致结构发生变化(树木再生时更多的原木和树苗)。景观结构多样性的变化可能会影响火灾模式,动物运动和较小生物体的栖息地可用性。我的长期目标是:A)预测不同森林中不同类型边缘的植被模式;和B)确定森林景观过渡中的结构多样性模式。我和我的学生将追求三个短期目标:1)我们将比较沿海森林边缘的植被结构模式。我们将估计过渡区的宽度,我们将把它与海洋的距离、海拔和邻近贫瘠地(无树植被)的宽度联系起来。2)我们将确定从四个不同的景观过渡的结构多样性模式:湿地森林和皆伐林过渡在西南部新斯科舍省,云杉芽虫干扰区森林和荒地森林过渡在布雷东角。我们将使用长样带和空间分析来比较景观的过渡和非过渡部分之间的结构多样性。3)我们将比较不同层次的结构多样性的景观过渡植被。目标1的结果将有助于我的长期目标,即开发一个预测模型,一个有用的工具,在保护,气候变化研究和景观生态学。估算和预测过渡宽度对于理解不同管理活动对保护的影响和预测气候变化的影响是重要的。结构多样性有可能成为一个重要的工具,以促进不同物种的景观之间的比较,特别是在加拿大的植物物种多样性普遍较低。绘制结构多样性的景观格局将有助于评估火灾管理的燃料供应和保护的栖息地供应。这一知识将大大推进景观生态学领域,目前缺乏具体的自然边缘的信息。加拿大将受益于更好地了解其森林的景观格局和过程,特别是因为它与可持续森林管理和气候变化有关。
项目成果
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Harper, Karen其他文献
Structure, composition, and diversity of old-growth black spruce boreal forest of the Clay Belt region in Quebec and Ontario.
- DOI:
10.1139/a03-013 - 发表时间:
2003-01-01 - 期刊:
- 影响因子:5.7
- 作者:
Harper, Karen;Boudreault, Catherine;Bergeron, Yves - 通讯作者:
Bergeron, Yves
Sunitinib in combination with docetaxel in patients with advanced solid tumors: a phase I dose-escalation study.
- DOI:
10.1007/s00280-009-1209-0 - 发表时间:
2010-09 - 期刊:
- 影响因子:3
- 作者:
Robert, Francisco;Sandler, Alan;Schiller, Joan H.;Liu, Glenn;Harper, Karen;Verkh, Lev;Huang, Xin;Ilagan, Jennifer;Tye, Lesley;Chao, Richard;Traynor, Anne M. - 通讯作者:
Traynor, Anne M.
Harper, Karen的其他文献
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{{ truncateString('Harper, Karen', 18)}}的其他基金
Vegetation structure across forest edges in heterogeneous landscapes
异质景观中森林边缘的植被结构
- 批准号:
DDG-2022-00015 - 财政年份:2022
- 资助金额:
$ 1.75万 - 项目类别:
Discovery Development Grant
Understanding boundary structure and function in heterogeneous landscapes
了解异质景观中的边界结构和功能
- 批准号:
DDG-2019-05066 - 财政年份:2021
- 资助金额:
$ 1.75万 - 项目类别:
Discovery Development Grant
Understanding boundary structure and function in heterogeneous landscapes
了解异质景观中的边界结构和功能
- 批准号:
DDG-2019-05066 - 财政年份:2020
- 资助金额:
$ 1.75万 - 项目类别:
Discovery Development Grant
Understanding boundary structure and function in heterogeneous landscapes
了解异质景观中的边界结构和功能
- 批准号:
DDG-2019-05066 - 财政年份:2019
- 资助金额:
$ 1.75万 - 项目类别:
Discovery Development Grant
Structural diversity across transitions in heterogeneous landscapes
异质景观转型中的结构多样性
- 批准号:
RGPIN-2014-06009 - 财政年份:2018
- 资助金额:
$ 1.75万 - 项目类别:
Discovery Grants Program - Individual
Structural diversity across transitions in heterogeneous landscapes
异质景观转型中的结构多样性
- 批准号:
RGPIN-2014-06009 - 财政年份:2017
- 资助金额:
$ 1.75万 - 项目类别:
Discovery Grants Program - Individual
Structural diversity across transitions in heterogeneous landscapes
异质景观转型中的结构多样性
- 批准号:
RGPIN-2014-06009 - 财政年份:2016
- 资助金额:
$ 1.75万 - 项目类别:
Discovery Grants Program - Individual
Structural diversity across transitions in heterogeneous landscapes
异质景观转型中的结构多样性
- 批准号:
RGPIN-2014-06009 - 财政年份:2014
- 资助金额:
$ 1.75万 - 项目类别:
Discovery Grants Program - Individual
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 - 财政年份:2013
- 资助金额:
$ 1.75万 - 项目类别:
Discovery Grants Program - Individual
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 - 财政年份:2012
- 资助金额:
$ 1.75万 - 项目类别:
Discovery Grants Program - Individual
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