e-ISSN 2231-8542
ISSN 1511-3701

Home / Regular Issue / JTAS Vol. 32 (2) Aug. 2009 / JTAS-0067-2008


Net Primary Productivity of Forest Trees: A Review of Current Issue

Hazandy Abdul-Hamid, Maurizio Mencuccini and Nor-Aini Ab-Shukor

Pertanika Journal of Tropical Agricultural Science, Volume 32, Issue 2, August 2009

Keywords: Keywords: Forest growth, canopies, photosynthesis – respiration imbalance

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Forest growth is important both economically and ecologically and it follows a predictable general trend with age. Generally, the growth of all forests accelerates as canopies develop in young forests and declines substantially soon after the maximum leaf area is attained. The causes of this decline trend are multiple. Initially, age- and size-related declines were attributed to photosynthesis-respiration imbalance. Subsequently, several competing hypotheses have been proposed over the years, although nutrient and hydraulic limitation hypotheses appear to be the most likely to have caused it. In this paper, the authors attempt to review these hypotheses and concentrate on one related aspect, as this can set the scene for further examining the issues of age-related versus size-related processes.

ISSN 1511-3701

e-ISSN 2231-8542

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