结构多样性与森林生产率更好地相关,而不是物种或功能多样性
Lu Zhai1, Rodney E Will1, Bo Zhang2
1Department of Natural Resource Ecology and Management, Oklahoma State University, Stillwater, Oklahoma, USA.
Ecology
|February 16, 2024
概括
结构多样性对森林生物质增加和净变化产生负面影响,可能是由于昆虫和疾病爆发的增加. 这一指标提供了比单独的物种或功能多样性更深入了解森林生产力.
科学领域:
- 森林生态 森林生态
- 生物多样性科学 生物多样性科学
- 量化生态学 量化生态学
背景情况:
- 生物多样性指标对于了解森林生产力至关重要.
- 结构多样性是植物器官大小和形状变化的衡量标准,是一种新兴的指标.
- 它对森林生产力组成部分的影响,如招聘和生物质变化,在大型空间尺度上仍然在很大程度上未知.
研究的目的:
- 量化结构多样性对森林生物质增加和净变化的影响.
- 为了比较结构多样性对物种和功能多样性在影响森林生产力的重要性.
- 为了研究像树年龄和海拔高度这样的因素如何与自然森林和植被森林的结构多样性相互作用.
主要方法:
- 利用美国农业部森林服务部门从美国中南部 (2008-2017) 的森林库存和分析 (FIA) 数据.
- 计算的森林生物质增加 (招募,增长) 和生物质净变化.
- 量化了非生物和生物变量 (包括结构,物种和功能多样性) 对生物质动态的影响.
主要成果:
- 结构多样性与生物质增加和生物质净变化有负相关性.
- 昆虫和疾病的增加与更大的结构多样性有关.
- 结构多样性与生物质动态的关联比物种或功能多样性更强,具有相反的负面影响.
结论:
- 结构多样性是影响森林生产力的重要因素,可能是通过加剧干扰.
- 结构多样性对生物质的负面影响可能与增加的害虫和疾病流行率有关.
- 在自然和种植森林之间观察到结构多样性,树年龄和高度的影响的差异,突出了树发展和组成的差异.
相关概念视频
01:19What is Biodiversity?
27.4K
Biodiversity describes the variety of living things at multiple organizational levels: genetic, species and ecosystem diversity. Species diversity includes all branches of the evolutionary tree from single-celled prokaryotic organisms, bacteria, and archaea, to the eukaryotic kingdoms: plants; animals; fungi; and protists. To date, there have been about 1.75 million species identified, and new species are discovered every week.
27.4K
01:21Structural Properties and Dimensions of Lumber
95
Wood's structural properties derive from fibers aligned along the tree's length, contributing significantly to its mechanical strength. Wood exhibits up to twenty times greater tensile strength along these fibers compared to across them, and generally shows better performance under compression than tension. The length of fibers varies, with hardwoods having fibers around one twenty-fifth inch long and softwoods ranging from one-eighth to one-third inch.
The strength characteristics of...
The strength characteristics of...
95
01:28Softwoods and Hardwoods
164
Softwoods and hardwoods, derived from different types of trees, are distinguished by their leaf structures and cellular compositions, each serving unique purposes in construction and manufacturing. Softwoods come from cone-bearing trees with needle-like leaves and are predominantly composed of longitudinal cells called tracheids and a smaller proportion of radial cells known as rays. Due to their cellular structure, softwoods are commonly used in construction for structural frames, sheathing,...
164
02:26Ecological Disturbance
17.1K
An ecological disturbance is a temporary disruption in the environment resulting from abiotic, biotic, or anthropogenic factors, causing a pronounced change in an ecosystem. The impact of an ecological disturbance, which can depend on its intensity, frequency, and spatial distribution, plays a significant role in shaping the species diversity within the ecosystem.
17.1K
01:20Structural Classification of Joints
3.4K
Joints, also known as articulations, are classified based on their structural characteristics, i.e., based on whether the articulating surfaces of the adjacent bones are directly connected by fibrous connective tissue or cartilage, or whether the articulating surfaces contact each other within a fluid-filled joint cavity. These differences serve to divide the joints of the body into three structural classifications.
A fibrous joint is where the adjacent bones are united by fibrous connective...
A fibrous joint is where the adjacent bones are united by fibrous connective...
3.4K
01:21Wood Products
82
Wood products encompass a broad range of materials crafted from wood strands, veneers, lumber, and even waste wood-like shreds, designed for both structural and nonstructural purposes. Various specialized wood products have been developed to enhance strength, durability, and versatility in building applications.
Glue-laminated wood, often referred to as glulam, combines multiple smaller pieces of dimensional lumber using adhesives to form a single, larger piece. Cross-laminated timber consists...
Glue-laminated wood, often referred to as glulam, combines multiple smaller pieces of dimensional lumber using adhesives to form a single, larger piece. Cross-laminated timber consists...
82