This paper sought to determine how different forest management regimes influence the pattern of forest degradation at different periods in Ghana. The paper tested the hypotheses that timber production forests degrade faster than protection forests and forest degradation slows down with time. For monitoring the changes in forest cover, Landsat TM, ETM+ and Landsat 8 with a spatial resolution of 30 m were used in the mapping of land use/land cover for the periods 1990, 2000, 2010 and 2014 using supervised classification technique. The results showed that forest degradation occurred at different rates within the period and was more rapid from 1990 to 2000 than from 2000 to 2010. Protected forests and Globally Significant Biodiversity Areas (GSBAs) declined in forest quality at the same rate as timber production forests and did not benefit from any extra protective measures. New strategies should be found to manage protection forests and GSBAs to ensure their optimum protection.

本文试图确定不同的森林管理制度如何影响加纳不同时期森林退化的模式。该论文检验了以下假设：木材生产林的退化速度快于防护林的速度，而森林退化的速度则随着时间而减慢。为了监测森林覆盖率的变化，采用监督分类技术，将空间分辨率为30 m的Landsat TM，ETM +和Landsat 8用于1990、2000、2010和2014年的土地利用/土地覆盖图。结果表明，在此期间森林退化的发生速度不同，1990年至2000年比2000年至2010年更快。受保护的森林和全球重要生物多样性地区（GSBA）的森林质量下降速度与木材生产森林相同，并且没有从任何额外的保护措施中受益。应该找到管理防护林和GSBA的新策略，以确保获得最佳保护。