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Examining the century dynamic change of forest oxygen production in Heilongjiang Province, China
Zhang, L. J.; Li, W. L.; Jiang, C. Y. & Zang, S. Y.
Abstract
During the past century, Heilongjiang Province,
the highest forest coverage province of China, has
experienced rapid deforestation, with coverage decreasing
by an estimated 40 %. As the important role that forest
vegetation plays in oxygen production and environmental
optimization, dynamic change analysis of forest and forest
oxygen production has become more and more important.
In this study, we examined changes in forest and forest
oxygen production, as well as the impact of natural and
human activities on such change in Heilongjiang Province,
China. In particular, the net ecosystem productivity (NEP)
of the forest was generated by the C-FIX model, and the
relationship between NEP and forest oxygen production
was examined. Analysis results indicate that in the past
century, the forest area and oxygen production of Heilongjiang
Province has been reduced by about
106,667.57 km2 (37.16 %) and 56.22 million tons (33 %),
respectively. Moreover, the spatial analysis results suggest
significant spatial variation of forest oxygen production in
Heilongjiang Province, China. Specifically, oxygen production
in the southwest has shifted from the highest area
to the lowest area, and significant decreases in forest
oxygen production have been observed in the Sanjiang
Plain and the central part of Heilongjiang Province. In
addition, oxygen production also presents decreasing tendencies
(>90 %) in Daqing City and Qiqihar. The analysis
of the impact of climate change and human activities on
forest oxygen production indicates that human activities
have the largest impact on forest oxygen production, accounting
for about 67.95 % of the decrease.
Keywords
Forest oxygen production; Forest cover change; Century dynamic change; Heilongjiang
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