Trendy セミナー   2009-06-08 (月) 17:00   北大・大学院地球環境 北海道大学地球環境 C 棟 1 階 C104講義室

Developing a predictive science of the biosphere

Paul Moorcroft (Harvard University)

概要:

陸域植生のモデルを開発し、タワーによる二酸化炭素などのフラックスデータとも照合して、生長と枯死を取り込んで、実際の森林動態を再現予測した。

Moorcroft教授は、森林動態と生態系過程を結びつけたモデリングのほかに、動物の行動圏モデルでも著名な研究者です。今回は1ヶ月間、招聘研究者として地球環境・環境生物科学部門に滞在されています。

Abstract: Insights into the role of terrestrial ecosystems in the earth's response to changes in climate and rising atmospheric CO2 levels rely heavily on the predictions of terrestrial biosphere models. These models contain detailed mechanistic representations of biological processes affecting terrestrial ecosystems; however, their ability to accurately predict field-based measurements of terrestrial vegetation dynamics and canopy carbon and water fluxes has remained largely untested. We have addressed this issue by developing a constrained implementation of a new structured terrestrial biosphere model, using eddy-flux tower measurements in conjunction with forest inventory measurements of tree growth and mortality. Evaluation against independent flux and forest dynamics measurements shows that the constrained model yields greatly improved predictions of observed patterns of carbon fluxes and tree growth with no further adjustment in model parameters. These results demonstrate how structured terrestrial biosphere models, which explicitly track the dynamics of fine-scale heterogeneity in ecosystem structure and composition, can be parameterized and tested against field-based measurements that provide quantitative insight into the underlying biological processes that govern ecosystem composition, structure and function at larger scales.


Trendy Seminar http://hosho.ees.hokudai.ac.jp/~trendy/2009/
世話役:宮田理恵
email:miyamiya@||@ees.hokudai.ac.jp
Phone:011-706-2267
Facsimile:011-706-4954
北海道大学大学院環境科学院 植物生態学