Ecological risk assessment based on land cover change: A case of Zanzibar-Tanzania, 2003-2027

Detalhes bibliográficos
Autor(a) principal: Omar, Hassan Mohammed
Data de Publicação: 2020
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10362/93717
Resumo: Dissertation submitted in partial fulfilment of the requirements for the degree of Master of Science in Geospatial Technologies
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spelling Ecological risk assessment based on land cover change: A case of Zanzibar-Tanzania, 2003-2027Ecological risk assessmentEcosystems servicesLand cover changes modellingLandscape ecological statistics (LECOS)Ecological risk assessmentEcosystems servicesLand cover changes modellingZanzibarDissertation submitted in partial fulfilment of the requirements for the degree of Master of Science in Geospatial TechnologiesLand use under improper land management is a major challenge in sub-Saharan Africa, and this has drastically affected ecological security. Addressing environmental impacts related to this major challenge requires faster and more efficient planning strategies that are based on measured information on land-use patterns. This study was employed to access the ecological risk index of Zanzibar using land cover change. We first employed Random Forest classifier to classify three Landsat images of Zanzibar for the year 2003, 2009 and 2018. And then the land change modeler was employed to simulate the land cover for Zanzibar City up to 2027 from land-use maps of 2009 and 2018 under business-as-usual and other two alternative scenarios (conservation and extreme scenario). Next, the ecological risk index of Zanzibar for each land cover was assessed based on the theories of landscape ecology and ecological risk model. The results show that the built-up areas and farmland of Zanzibar island have been increased constantly, while the natural grassland and forest cover were shrinking. The forest, agricultural and grassland have been highly fragmented into several small patches relative to the decrease in their patch areas. On the other hand, the ecological risk index of Zanzibar island has appeared to increase at a constant rate and if the current trend continues this index will increase by up to 8.9% in 2027. In comparing the three future scenarios the results show that the ERI for the conservation scenario will increase by only 4.6% which is at least 1.6% less compared to 6.2% of the business as usual, while the extreme scenario will provide a high increase of ERI of up to 8.9%. This study will help authorities to understand ecological processes and land use dynamics of various land cover classes, along with preventing unmanaged growth and haphazard development of informal housing and infrastructure.Cabral, Pedro da Costa BritoMeyer, HannaGranell-Canut, CarlosRUNOmar, Hassan Mohammed2020-03-03T17:33:12Z2020-02-282020-02-28T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10362/93717TID:202456960enginfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-03-11T04:42:00Zoai:run.unl.pt:10362/93717Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:37:49.923239Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Ecological risk assessment based on land cover change: A case of Zanzibar-Tanzania, 2003-2027
title Ecological risk assessment based on land cover change: A case of Zanzibar-Tanzania, 2003-2027
spellingShingle Ecological risk assessment based on land cover change: A case of Zanzibar-Tanzania, 2003-2027
Omar, Hassan Mohammed
Ecological risk assessment
Ecosystems services
Land cover changes modelling
Landscape ecological statistics (LECOS)
Ecological risk assessment
Ecosystems services
Land cover changes modelling
Zanzibar
title_short Ecological risk assessment based on land cover change: A case of Zanzibar-Tanzania, 2003-2027
title_full Ecological risk assessment based on land cover change: A case of Zanzibar-Tanzania, 2003-2027
title_fullStr Ecological risk assessment based on land cover change: A case of Zanzibar-Tanzania, 2003-2027
title_full_unstemmed Ecological risk assessment based on land cover change: A case of Zanzibar-Tanzania, 2003-2027
title_sort Ecological risk assessment based on land cover change: A case of Zanzibar-Tanzania, 2003-2027
author Omar, Hassan Mohammed
author_facet Omar, Hassan Mohammed
author_role author
dc.contributor.none.fl_str_mv Cabral, Pedro da Costa Brito
Meyer, Hanna
Granell-Canut, Carlos
RUN
dc.contributor.author.fl_str_mv Omar, Hassan Mohammed
dc.subject.por.fl_str_mv Ecological risk assessment
Ecosystems services
Land cover changes modelling
Landscape ecological statistics (LECOS)
Ecological risk assessment
Ecosystems services
Land cover changes modelling
Zanzibar
topic Ecological risk assessment
Ecosystems services
Land cover changes modelling
Landscape ecological statistics (LECOS)
Ecological risk assessment
Ecosystems services
Land cover changes modelling
Zanzibar
description Dissertation submitted in partial fulfilment of the requirements for the degree of Master of Science in Geospatial Technologies
publishDate 2020
dc.date.none.fl_str_mv 2020-03-03T17:33:12Z
2020-02-28
2020-02-28T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10362/93717
TID:202456960
url http://hdl.handle.net/10362/93717
identifier_str_mv TID:202456960
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
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reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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