NDLI: Changing ecophysiological processes and carbon budget in East Asian ecosystems under near-future changes in climate: implications for long-term monitoring from a process-based model

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Changing ecophysiological processes and carbon budget in East Asian ecosystems under near-future changes in climate: implications for long-term monitoring from a process-based model

Content Provider	Springer Nature Link
Author	Ito, Akihiko
Copyright Year	2010
Abstract	Using a process-based model, I assessed how ecophysiological processes would respond to near-future global changes predicted by coupled atmosphere–ocean climate models. An ecosystem model, Vegetation Integrative SImulator for Trace gases (VISIT), was applied to four sites in East Asia (different types of forest in Takayama, Tomakomai, and Fujiyoshida, Japan, and an Alpine grassland in Qinghai, China) where observational flux data are available for model calibration. The climate models predicted +1–3°C warming and slight change in annual precipitation by 2050 as a result of an increase in atmospheric CO2. Gross primary production (GPP) was estimated to increase substantially at each site because of improved efficiency in the use of water and radiation. Although increased respiration partly offset the GPP increase, the simulation showed that these ecosystems would act as net carbon sinks independent of disturbance-induced uptake for recovery. However, the carbon budget response relied strongly on nitrogen availability, such that photosynthetic down-regulation resulting from leaf nitrogen dilution largely decreased GPP. In relation to long-term monitoring, these results indicate that the impacts of global warming may be more evident in gross fluxes (e.g., photosynthesis and respiration) than in the net CO2 budget, because changes in these fluxes offset each other.
Starting Page	577
Ending Page	588
Page Count	12
File Format	PDF
ISSN	09189440
Journal	Journal of Plant Research
Volume Number	123
Issue Number	4
e-ISSN	16180860
Language	English
Publisher	Springer Japan
Publisher Date	2010-02-19
Publisher Place	Japan
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Carbon–nitrogen cycle Elevated CO2 Fertilization effect Global warming Leaf area index VISIT model Plant Biochemistry Plant Physiology Plant Ecology Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Plant Science

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