JapanFlux2024 JP-Ynf Yona-Field Tower Site

This is the southernmost university training forest in Japan, located in the "Yanbaru" region in the northern part of Okinawa's main island.A variety of trees make up the highly diverse forest. The training forest was established in 1954. It is located on the west side of the Seiryo Mountains in Kunigami Village, and is leased from the 76-79 stock group of the prefectural forest.
Subtropical evergreen broadleaf forests dominated by Japanese knotweed and iju are widespread. Ten percent of the total area has been converted to planted forests of Ryukyu pine, cedar, iju, and Japanese cypress.
In March 2013, a 15-meter-high observation tower will be installed on the ridge of Group 79. Located in the southernmost part of Japan, the tower is expected to play a major role in clarifying the actual conditions of the material canopy of subtropical forests, where little is known. Observation of water, heat, and CO2 fluxes between the forest and the atmosphere has begun at the tower. In a 0.25 ha plot centered on the tower, regular surveys of tree growth, leaf area index, litterfall, and soil respiration are also being conducted.

本实训林为日本最南端的高校实训林，坐落于冲绳本岛北部的「山原（Yanbaru）」地区。该林分由多样林木构成，物种多样性极高。这片实训林始建于1954年，地处国头村青陵山脉西侧，租赁自县营林第76-79林班。以虎杖（Japanese knotweed）与iju为优势种的亚热带常绿阔叶林广泛分布于该区域。林地区域总面积的10%已被改造为琉球松（Ryukyu pine）、雪松（cedar）、iju及日本扁柏（Japanese cypress）的人工林。2013年3月，第79林班山脊处搭建起一座高15米的观测塔。作为日本最南端的森林观测塔，其将为阐明研究尚浅的亚热带森林冠层实际物质状况发挥关键作用。目前该塔已启动森林与大气间的水、热及二氧化碳（CO2）通量观测工作。在以该塔为中心的0.25公顷样地内，同步开展林木生长、叶面积指数、枯落物产量及土壤呼吸的常规监测工作。