Personal Information

I am a postdoctoral researcher at National Chung Hsing University, Taiwan. My research focuses on forest ecosystems under global climate change, with particular emphasis on the ecological pathways that drive tree mortality. I investigate how trees die within forest ecosystems by integrating long-term forest dynamics data from both temperate forests in the western United States and tropical forests in Taiwan. In addition, my work examines aboveground biomass dynamics and their implications for forest carbon storage and loss through ecological processes. By linking mortality pathways with carbon cycling, I aim to better understand how forests function as carbon sinks or sources under changing environmental conditions. I have also compiled extensive datasets from the Nanjenshan Forest Dynamics Plot, a long-term research site that provides valuable insights about wind. If you are interested in this plot, please contact with our principal investigator for potential collaboration. The following sections describe my current research projects, which will continue to develop in the future.

1. Ecosystem process over time:

   • Spatial pattern analysis the species distribution and interaction in western United stats

   • Mortality process in the forest ecosystem: Investigating the mechanisms of tree mortality within forest ecosystems 

2. Carbon stocks:

   • Allometric equation: Including tree height equation and biomass estimation. Developing a tree height database for Taiwan's forest species to enhance accurate aboveground biomass estimation.

   • Biomass in spatial and temporal Variation: Biomass variations across diverse tree sizes within different environmental condition, considering topographic influences over time.

   • Litterfall in the forest ecosystem

I possess proficiency in R Studio and coding using libraries such as ggplot2, dplyr, and tidyr for data visualization and analysis. I am also familiar with vegetation analysis and spatial pattern analysis. Writing code gives me a sense of achievement born from a solitary struggle. However, I am willing to share and work with the coding team. Please contact me if you are interested in "something". Several public codes that I used to participate in  #30DaysMapChallenge and R class in 2023 and 2024 are for open reference (https://github.com/jjakon11).

Ϯ After 2024, due to the constraints of the research project, I spent two research periods at Utah State University (May–October 2024 and May–October 2025), while the remaining time was based at National Chung Hsing University.