Ginkgo biloba L., often called the ginkgo tree or maidenhair tree, is considered an ancient tree. It is the only surviving species of a group of trees that dates back over 200 million years, making it a "living fossil." Ginkgo trees were widespread during the time of the dinosaurs and have remained largely unchanged in their structure and appearance since then. While its natural habitat includes China, Japan, and Korea, the ginkgo tree is thought to have originated in the remote mountainous valleys of Zhejiang province in eastern China.

Tree demography involves quantifying the mortality, growth, and recruitment of trees in a particular area, providing clear insights into the current and future vulnerabilities of tree populations and aiding in effective management. In a broader context, forest demography encompasses recruitment, mortality, and growth. When applying these principles to urban settings, the term "removal rate" is more suitable for mortality due to the human intervention involved in removing urban trees. Despite this, the same principles of forest demography apply to urban settings, though the processes differ. Recruitment in urban areas can occur through regeneration or planting at new sites or as replacements at old sites. Long term monitoring, and surveying urban trees provide valuable information for urban city planners, and policy makers. In such surveys, it is crucial to focus on different plant species and their specific responses to the surrounding environment to evaluate species-specific reactions. Additionally, gaining a better understanding of tree mortality or survival over a particular time period, growth rates, species composition, harmful factors for trees, and decaying or dying trees in an urban area can provide valuable insights into the quality of greenery components.

This era is defined by urbanization. Over one third of world’s human population is expected to be live in cities by 2050. The estimated urban areas for the future occupancy have not yet been built. However, the design and quality of future cities, evolution of today’s society will become turning points of the well being of billions of people. The upcoming decades are expected to witness a dramatic reduction in biodiversity, a phenomenon linked to what scientists are calling the Sixth Mass Extinction. This mass extinction is characterized by an accelerated rate of species loss, primarily driven by human activities such as deforestation, pollution, climate change, and over exploitation of natural resources.

Maple is considered one of the dominant urban trees due to its ability to tolerate the tough environmental conditions in cities. Maple belongs to the genus Acer, which includes more than 100 species worldwide. The Latin word Acer means sharp or keen referring to the characteristic points of the leaf blades in this genus. Variety of Species: With over 100 species, maples can be selected to suit different climates, soil types, and space constraints. Some maples, like the Norway maple (Acer platanoides), are particularly hardy and can thrive in urban environments. Many maple species are tolerant of air pollution, making them suitable for city environments where air quality might be lower. Maple trees are known for their vibrant fall colors, adding significant aesthetic value to urban landscapes.