Land Use Policy 49 (2015) 236–251
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Land Use Policy
journal homepage: www.elsevier.com/locate/landusepol
Three decades of forest cover change in Uganda’s Northern Albertine
Rift Landscape
Ronald Twongyirwe
a,∗
, Mike Bithell
a
, Keith S. Richards
a
, W.G. Rees
a,b
a
Department of Geography, University of Cambridge, Downing Place, Cambridge CB2 3EN, England, United Kingdom
b
Scot Polar Research Institute, University of Cambridge, Lensfield Road, Cambridge, CB2 1ER, England, United Kingdom
a r t i c l e i n f o
Article history:
Received 15 October 2014
Received in revised form 30 June 2015
Accepted 15 July 2015
Keywords:
Deforestation
Forest gain
spatial-scale
Albertine Rift Landscape
a b s t r a c t
Deforestation within and outside protected areas is widespread in Western Uganda, but quantification of
such forest changes is rare. In this study, spatio- temporal forest cover patterns in the Northern Albertine
Rift Landscape were reconstructed for the period 1985–2014, over a range extending from Bugoma forest
in the South of the region to as far as Murchison Falls National Park in the North, an area approximately
225 km North-South by 63 km East–West. We examine both the spatial and temporal heterogeneity of the
land cover changes. Seven 30 × 30 m resolution, ortho-rectified, cloud-free Landsat images obtained from
the USGS archive were analysed at the landscape- and three smaller scales. Forest classification using
Landsat imagery appears robust; similar amounts are obtained from a UK-DMCii image (22 m resolution)
taken a day before the Landsat scene in Dec, 2010. Our results show that larger-scale aggregate measures
of total change can obscure more local patterns, in which protected areas and the national park maintain
or grow forest cover, whilst the forest corridor areas that are not protected suffer drastic losses. Time-
series show that the loss continues nearly linearly into the present around Bugoma, but seems to level
off around Budongo Forest after 2010, apparently because almost all forested corridor areas have been
cleared. At the landscape scale, between 1985 and 2014, the data suggest approximately 0.4% of initial
cover was lost per year. However, this was mostly a result of the large protected forest blocks remaining
relatively stable; deforestation was mostly situated in the corridor and riverine areas. Local-scale losses
were most prominent in unprotected forests around Budongo and Bugoma, with annual losses at a much
higher average rate about of 3.3% per year in each case. The annual rates of loss are higher than Uganda’s
average (1–3%). Forest cover in the protected zones expanded only marginally, with annual average
increases of order 0.03% and 0.5% in Budongo and Bugoma reserves, respectively. Our results suggest
that forest protection in the gazetted areas is successful, and the protection policy is working, but these
forests are being isolated by large losses immediately outside the protected zones, in the forest corridors.
This may have severe social and ecological consequences—both within and outside protected forests.
© 2015 Elsevier Ltd. All rights reserved.
1. Introduction
Deforestation threatens biodiversity, climate and livelihoods
(Bala et al., 2007). Deforestation rates in the African Tropics are
some of the highest in the world (Achard et al., 2002), and
accounted for over 23% of global forest loss between 1990 and 2009
(Houghton, 2012). Deforestation is reported to have increased in
several parts of Uganda in the last half-century. Examples include
conversion for coffee production around Mt. Elgon in Eastern
Uganda (Sassen et al., 2013). Forest loss on protected and pri-
∗
Corresponding author.
E-mail address: twongyirwe@gmail.com (R. Twongyirwe).
vate land around Kibale National Park in South- western Uganda is
attributed to charcoal production (with preference for old-growth
hardwood tropical species), high fuelwood demand by the tea
industry, settlement and agricultural expansion (Naughton-Treves
et al., 2007). Forest cover has been lost around Bwindi impenetrable
forest in South-western Uganda, as a result of agricultural expan-
sion and ambiguous forest boundaries (Twongyirwe et al., 2011).
Recently, Ryan et al. (2014) found that population changes are cor-
related with forest loss along the whole Albertine Rift, but they
sampled the region sparsely, excluding protected areas, and only
looked at two time points.
There is however evidence of successful forest protection in
some National Parks and Forest Reserves by Uganda’s designated
forest authorities (e.g., Bwindi impenetrable forest, see Hamilton
et al., 2000; Budongo, Wambabya and Bugoma forests—this paper).
http://dx.doi.org/10.1016/j.landusepol.2015.07.013
0264-8377/© 2015 Elsevier Ltd. All rights reserved.