Study on the Relationship between Tree Layer and Understory Qiongzhuea multigemmia of Forest Community in Giant Panda Habitat

This study investigates the relationship between the tree layer structure of a forest community and the growth of understory Qiongzhuea multigemmia (a type of bamboo) within a giant panda habitat. Researchers used line transects and quadrat methods to collect data in the Daxiangling Giant Panda habitat. Statistical models, including generalized linear mixed models (GLMM) and linear mixed models (LMM), were employed to analyze the data. The findings indicate that various aspects of the tree layer, such as canopy density, number of trees, and average tree height, significantly influence the growth and abundance of the understory bamboo. Specifically, canopy density affects the diameter, number, and height of bamboo shoots. The number of trees influences the quantity of bamboo shoots and both live and dead bamboo stalks. Tree height impacts the number of bamboo shoots, as well as the height and base diameter of perennial bamboos. This research provides a quantitative understanding of how forest structure supports bamboo growth, which is crucial for giant panda food resources. The study's results offer a basis for habitat restoration efforts in the region, aiming to improve conditions for giant pandas by managing forest ecosystems.