Personal Information

I am a Post-Doctoral Researcher at National Chung Hsing University, Taiwan. My current research focuses on two main topics. First, I investigate the population dynamics and mortality processes of Taxus brevifolia (Pacific yew) and Tsuga heterophylla (Western hemlock) using spatial point pattern analysis in temperate forests. Second, I work on developing tree height estimation equations for subtropical forests in Taiwan, utilizing data from forest dynamics plots across the entire island.  Additionally, gathering data on various topics, with a particular emphasis on the Nanjenshan Forest Dynamics Plot. I have organized the data for this plot and am looking to collaborate with other forest research teams. I am now collaborating with most of the Forest Dynamics Plots in Taiwan, aiming to better understand biomass allocation across this subtropical-tropical island. Below are the detail descriptions of research projects I am currently working on:

1. Mortality in ecological process

   • Spatial pattern analysis: In addition to studying Taxus and Tsuga in western United States forests, I am also applying this technique to several Forest Dynamics Plots, focusing on detecting negative density dependence in forests with high topographic heterogeneity 

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

2. Carbon stocks in natural forests:

   • 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.

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).