Spatio-temporal analysis of forest changes in contrasting land use regimes of Zanzibar, Tanzania

Kukkonen, Markus; Käyhkö, Niina

doi:10.1016/j.apgeog.2014.09.013

Cited by 31 publications

(39 citation statements)

References 45 publications

(63 reference statements)

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“…A major increase was observed in semi-open forest and bush, which increased from 10.54 to 34.7%. These results correspond to the findings of Kukkonen and Kayhko (2014) in Unguja Island and Solomon et al (2018) in Wujig Mahgo Waren, Northern Ethiopia This study has also revealed that since 1975, a large part of the forest has been transformed to shrub forest and semi-open forest and bush (Table 5 and Figure 2). Only about 4129.9 ha had remained as forest in 2014.…”

Section: Patterns Of Land Cover Changes From 1975 To 2014supporting

confidence: 88%

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Land cover changes and their determinants in the coral rag ecosystem of the South District of Unguja, Zanzibar

Said¹,

Misana²

2018

J. Ecol. Nat. Environ.

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This paper presents the findings on the study on land cover changes and their determinants in the coral rag ecosystem of the South District of Unguja. The study is based on data extracted from the 1975, 2009, and 2014 satellite images using remote sensing and geographical information systems (GIS) techniques. Additional data were collected through structured interviews in a household survey, focus group discussions, key informant interviews, transect walks and observation. The major change detected in the study area from 1975 to 2014 was the decline of forests by 28.3% from 43.31 to 15% and the increase of semi-open forest and bush by 24.16% from 10.54 to 34.7%. During the same time, settlements increased from 0.1 to 4.9%. Different factors both direct and underlying have caused land cover change in the study area. Direct causes include shifting cultivation, commercial cutting of wood for fire wood, charcoal, pegs and cutting sticks for seaweed farming, while the underlying ones are population growth, policy reform and policy failure, land tenure insecurity, soil as well as the terrain and underlying rocks. If not properly addressed, land cover changes are likely to affect either positively or negatively the wildlife as well as the livelihoods of the communities. Investment in intensive cultivation and alternative sources of energy is required to reduce over utilization of forest resources and to improve conservation and people's livelihood.

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Section: Patterns Of Land Cover Changes From 1975 To 2014supporting

confidence: 88%

“…The main primary economic activity in the South District of Unguja is agriculture. Shifting cultivation is the common method of farming because of the nature of the soil (Kukkonen and Kayhko, 2014). Other common economic activities in the study are commercial cutting of wood and fishing.…”

Section: The Study Areamentioning

confidence: 99%

Land cover changes and their determinants in the coral rag ecosystem of the South District of Unguja, Zanzibar

Said¹,

Misana²

2018

J. Ecol. Nat. Environ.

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“…Remote sensing from space provides an unprecedented perspective on changing forest cover, allowing continuous maps to be constructed and spatiotemporal patterns of fragmentation to be analysed (Taubert et al , ). Assessments of forest fragmentation have been completed for many countries including Canada, Chile, China, the Democratic Republic of Congo, India, Malaysia, Myanmar, New Zealand, North Korea, Tanzania, the United Kingdom and the USA (Leimgruber et al , ; Watts, ; Ewers et al , ; Kupfer, ; Abdullah & Nakagoshi, ; Echeverria et al , ; Wulder et al , ; Kang & Choi, ; Reddy et al , ; Kukkonen & Käyhkö, ; Shapiro et al , and Li et al , ). Many of these studies highlight that fragmentation is having severe effects on natural ecosystems by increasing isolation, creating edges, and decreasing core areas of habitat.…”

Section: Introductionmentioning

confidence: 99%

Forest fragmentation in China and its effect on biodiversity

et al. 2019

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Land‐use change is fragmenting natural ecosystems, with major consequences for biodiversity. This paper reviews fragmentation trends – historical and current – in China, the fourth largest country on Earth, and explores its consequences. Remote sensing makes it possible to track land‐use change at a global scale and monitor fragmentation of dwindling natural landscapes. Yet few studies have linked fragmentation mapped remotely with impacts on biodiversity within human‐modified landscapes. Recent reforestation programs have caused substantial increases in forest cover but have not stopped fragmentation, because the new forests are mostly monocultures that further fragment China's remnant old‐growth lowland forests that harbour the highest levels of biodiversity. Fragmentation – and associated biodiversity declines – is unevenly distributed in China's forests, being most problematic where agricultural expansion is occurring in the southwest and northeast, serious in the densely populated eastern regions where urbanisation and transport infrastructure are modifying landscapes, but less of a problem in other regions. Analyses of temporal trends show that the drivers of forest fragmentation are shifting from mainly agricultural expansion to urbanisation and infrastructure development. Most of China's old‐growth forests persist in small, isolated fragments from which many native species have disappeared, on land unsuitable for human utilisation. Fragmentation throughout China is likely to have major consequences on biodiversity conservation, but few studies have considered these large‐scale processes at the national level. Our review fills this research gap and puts forward a systematic perspective relevant to China and beyond.

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“…This cooperation has sprouted several academic theses and scientific articles over the years (eg. Makandi, 2008, Käyhkö et al, 2011, Fagerholm et al, 2012, Eilola et al, 2014, Zahor, 2014, Kukkonen & Käyhkö, 2014, Khamis et al, 2017.…”

Section: Long-term Cooperation Between Udsm and Utumentioning

confidence: 99%

Building Geospatial Competences in Tanzanian Universities With Open Source Solutions

Käyhkö¹,

William²,

Mayunga³

et al. 2018

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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The GEO-ICT is an institutional cooperation project aiming at improving the quality and societal relevance of geospatial and ICT research and education at the Universities of Dar es Salaam (UDSM), Ardhi University (ARU), State University of Zanzibar (SUZA) and Sokoine University of Agriculture (SUA). Jointly with the University of Turku (UTU) Finland, the institutions focus on strengthening geospatial and ICT skills of the staff, establishing new curricula, upgrading supportive infrastructures and creating synergetic cooperation modalities with different stakeholders in the society. In this paper we share how our practical experiences of the cooperation, including what is the background for the establishment of institutional cooperation between these universities, how is the project operating in practice, what type of activities and cooperation modalities we do together and how do we think institutional cooperation contributes to the advancement of geospatial expertise in Tanzania and what is the role of open source solutions in this development.

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Spatio-temporal analysis of forest changes in contrasting land use regimes of Zanzibar, Tanzania

Cited by 31 publications

References 45 publications

Land cover changes and their determinants in the coral rag ecosystem of the South District of Unguja, Zanzibar

Land cover changes and their determinants in the coral rag ecosystem of the South District of Unguja, Zanzibar

Forest fragmentation in China and its effect on biodiversity

Building Geospatial Competences in Tanzanian Universities With Open Source Solutions

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