Chronological change of CO2 budget and population structure evaluated by scaling of whole-tree respiration

2014 Fiscal Year Final Research Report

• Project/Area Number: 23380094
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Forest science
• Research Institution: Yamagata University (2013-2014); Forestry and Forest Products Research Institute (2011-2012)
• Principal Investigator: MORI Shigeta 山形大学, 農学部, 教授 (60353885)
• Co-Investigator(Kenkyū-buntansha): HAGIHARA Akio 琉球大学, 海洋生物学部 (90126889) ; YAMAJI Keiko 筑波大学, 大学院環境科学研究科 (90126889)
• Co-Investigator(Renkei-kenkyūsha): KAGAWA Akira 森林総合研究所 (40353635) ; NISHIZONO Tomohiro 森林総合研究所 (90353797)
• Project Period (FY): 2011-04-01 – 2015-03-31
• Keywords: 個体生理学 / metabolic scaling / 呼吸 / 二酸化炭素収支

Outline of Final Research Achievements

We report the dynamics of a magrove forest at Manko wetland. Based on the structural and physiological properties , we simulated forest dynamics for 50 years and compared these results to field data sets. In general, the ratio of the relative growth rate (RGR) to the relative mortality rate (RMR) is around 1.5 in the full-self-thinning phase. On the basis of the simulation results, we hypothesize that the RGR/RMR in the stands is greater than 1.5 in the pre-full-self-thinning phase from 0-6 years, is 1.5 in the full-self thinning phase from 7-27 years, and fluctuates in the post-full-self-thinning phase after 27 years.
We developed a new method to directly measure whole-plant respiration within a 100000000000 fold range of individual mass. Using results of about 600 individuals, we statistically rejected all simple-power functions. Instead, metabolic scaling can be better described statistically with a mixed-power function.

Free Research Field

森林圏科学