城市化对树木生长的影响和西体解剖学特征
Xiaohui Gao1, Binqing Zhao2, Zecheng Chen2
1Aulin College, Northeast Forestry University, Harbin 150040, China.
Biology
|November 24, 2023
概括
城市化减缓了树木的生长,降低了城市树木的液压导电性. 然而,宽叶树的血管密度增加,而松树则由于空气污染而细胞壁厚度减少.
科学领域:
- 环境科学 环境科学
- 植物学 植物学
- 生态生态学 生态生态学
背景情况:
- 全球城市化加剧,引发了人们对其对城市生态系统的影响的担忧.
- 城市热岛和空气污染对城市树木生长的影响仍然不完全理解.
- 树环分析提供了一种评估历史生长对环境变化反应的方法.
研究的目的:
- 为了比较城市和农村树木的半径生长和树木体解剖特征.
- 调查城市化对宽叶和针叶树种类的影响差异.
- 确定物种对城市环境压力因素的特定敏感性,如空气污染和热量.
主要方法:
- 在三个物种中对树环解剖学的比较分析:Quercus mongolica,Fraxinus mandshurica和Pinus sylvestris var. 蒙古. 蒙古利亚.
- 在哈尔的城市和农村地区进行采样,以确定环境梯度.
- 测量体解剖特征,包括血管数,面积,密度,细胞壁厚度和液压导电性.
主要成果:
- 在城市和农村树木之间观察到生长和树叶结构的显著差异.
- 农村树木表现出较高的容器数量,累积容器面积和理论液压导电性,表明城市生长速度较慢.
- 城市宽叶树显示出增加的容器密度和理论上的体特定的液压导电性,而Pinus sylvestris var.则显示出增加的容器密度和理论上的体特定的液压导电性. 蒙古利亚的细胞壁厚度和强化指数减少,这表明对空气污染的敏感性.
结论:
- 城市化,包括热量和污染,通常会阻碍树木生长和水力效率.
- 特定物种的反应各不相同,宽叶树与针叶树不同地适应城市条件.
- 松树 (Pinus sylvestris var.) 是一种植物. 蒙古特别敏感于空气污染,而Fraxinus mandshurica似乎比Quercus mongolica对城市化不那么敏感. 气候变化也可能影响树木的生长.
相关概念视频
02:03Xylem and Transpiration-driven Transport of Resources
23.9K
The xylem of vascular plants distributes water and dissolved minerals that are taken up by the roots to the rest of the plant. The cells that transport xylem sap are dead upon maturity, and the movement of xylem sap is a passive process.
23.9K
02:36Meristems and Plant Growth
46.0K
Plants grow throughout their lives; this is called indeterminate growth, and it distinguishes plants from most animals. Although certain parts of plants stop growing (e.g., leaves and flowers), others grow continuously—like roots and stems.
46.0K
03:02Primary and Secondary Growth in Roots and Shoots
57.2K
Vascular plants, which account for over 90% of the Earth’s vegetation, all undergo primary growth—which lengthens roots and shoots. Many land plants, notably woody plants, also undergo secondary growth—which thickens roots and shoots.
57.2K
01:19Introduction to Wood
238
Wood, derived from trees, is a versatile and widely used construction material. Trees feature a trunk surrounded by a protective layer of dead bark. Beneath this outer layer lies the living bark, followed by the cambium, and then the sapwood which transitions into heartwood as it matures. At the center of the trunk is the pith. The age of a tree can be discerned by examining its growth rings, which are concentric bands visible in the trunk's cross-section.
The structural integrity of the...
The structural integrity of the...
238
02:19Morphogenesis
28.2K
Plant morphogenesis—the development of a plant’s form and structure—involves several overlapping developmental processes, including growth and cell differentiation. Precursor cells differentiate into specific cell types, which are organized into the tissues and organ systems that make up the functional plant.
28.2K
02:41Responses to Drought and Flooding
10.7K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
10.7K