公告日期 : 2013-12-27
Carbon Storage Benefit by Trees of Air Quality Purification Zones in Taiwan’s Five Municipalities
Authors：Yi-Chung Wang, Min-Yi Lin, Shu-Hsin Ko, Jiunn-Cheng Lin
Key words：urban forest, green space, air quality purification zones, carbon storage.
In 1995, the national government in Taiwan began setting up air quality purification zones (AQPZs) by planting trees in order to improve the air quality, increase carbon sequestration, enhance the quality of the living environment, and achieve numerous other environmental benefits. This study investigated tree growth and carbon storage benefits in 28 AQPZs in Taiwan’s 5 major municipalities (Taipei, New Taipei City, Taichung, Tainan, and Kaohsiung). Results of the survey showed that 3963 trees of 99 species had been planted in sample plots. Overall, the average tree height was 6.31 m, the average diameter at breast height was 17.77 cm, the average crown width was 4.53 m, the average basal area was 0.040 m2, the average crown cover area was 21.64 m2, the average individual tree volume was 0.163 m3, the total timber volume of all sample plots was 645.336 m3, the average individual tree carbon storage was 0.063 tons of C, and the total forest carbon storage capacity of all sample plots was 251.036 tons of C. Among the 99 tree species identified in the survey, Ficus microcarpa, Terminalia mantaly, Koelreuteria elegans, and Cinnamomum camphora were the most common in the AQPZs of the 5 municipalities. Since this study included survey date from only one time point, information on growth among different years could not be obtained, and the analysis of carbon content results applied only to currently existing carbon storage rather than to interannual variation. Therefore, under the premises of “measureable, reportable, and verifiable,” continued monitoring of AQPZs is needed to provide quantification of future national carbon sink benefits.