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Woody invasive alien species in East Africa: assessing and mitigating their negative impact on ecosystem services and rural livelihood

Applicant Schaffner Urs
Number 177588
Funding scheme r4d (Swiss Programme for Research on Global Issues for Development)
Research institution CABI
Institution of higher education Non-profit organisations (libraries, museums, foundations) and administration - NPO
Main discipline Ecology
Start/End 01.01.2018 - 31.12.2021
Approved amount 1'615'755.00
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All Disciplines (7)

Discipline
Ecology
Environmental Research
Psychology
Economics
Science of management
Hydrology, Limnology, Glaciology
Sociology

Keywords (6)

sustainable land management; ecosystem services; East Africa; Invasive alien species; woody plant species; rural livelihood

Lay Summary (German)

Lead
Im 20. Jahrhundert wurden in vielen Regionen der Erde gebietsfremde Bäume und Sträucher angepflanzt, weil man sich von ihnen verschiedene Nutzen erhoffte (z.B. Brennholz, Erosionsschutz). Heute gehören einige von ihnen weltweit zu den invasivsten Pflanzen und verursachen ökologische (z.B. Abnahme der Biodiversität, Absenken des Grundwasserspiegels) und sozio-ökonomische Probleme (z.B. geringere Erträge von der Viehzucht oder von Ackerkulturen). Das Projekt möchte Lösungsansätze zur Bekämpfung negativer Auswirkungen in Ostafrika entwickeln.
Lay summary

Inhalt und Ziele des Forschungsprojekts

Basierend auf den in einem Vorgängerprojekt gesammelten Erkenntnissen über den ökologischen und sozio-ökonomischen Einfluss invasiver Bäume und Sträucher werden in drei Regionen Ostafrikas Lösungsansätze zu einer nachhaltigen Ressourcennutzung in befallenen Gebieten erarbeitet und deren Umsetzung getestet. Die zu testenden Ansätze werden von Vertretern verschiedener Interessensgruppen gemeinsam bestimmt. Gleichzeitig wird das Projektteam mit lokalen Akteuren technische Massnahmen zur Invasionsbekämpfung überprüfen und die Bedeutung der Grundbesitz-Verhältnisse und der institutionellen Rahmenbedingungen für deren erfolgreiche Umsetzung untersuchen. Das bei der Erarbeitung und Testumsetzung der Lösungsansätze erarbeitete Wissen wird so zusammengefasst und kommuniziert, dass es mit bestehenden Formen der nachhaltigen Ressourcennutzung kombiniert werden kann.

 

Wissenschaftlicher und gesellschaftlicher Kontext des Forschungsprojekts

In diesem Projekt wird das in einem Vorgängerprojekt erarbeitete Wissen zur Erarbeitung von Lösungsansätzen genutzt, um die Multifunktionalität von Ökosystemen in von invasiven Bäumen und Sträuchern befallenen Gebieten in Ostafrika wiederherzustellen und damit die Lebensbedingungen der Nomaden und Kleinbauern zu verbessern. Damit leistet dieses Projekt einen Beitrag zum Erreichen der in der Agenda 2030 formulierten Ziele für eine nachhaltige Entwicklung, insbesondere des Ziels 15 ‚Landökosysteme wiederherstellen und ihre nachhaltige Nutzung fördern‘ mit seinen Unterzielen 15.3 'Neutraliisierung der Landverödung' und 15.8 'Auswirkungen invasiver gebietsfremder Arten reduzieren'.

 

Direct link to Lay Summary Last update: 15.01.2018

Responsible applicant and co-applicants

Publications

Publication
Modelling the current fractional cover of an invasive alien plant and drivers of its invasion in a dryland ecosystem
Shiferaw Hailu, Schaffner Urs, Bewket Woldeamlak, Alamirew Tena, Zeleke Gete, Teketay Demel, Eckert Sandra (2019), Modelling the current fractional cover of an invasive alien plant and drivers of its invasion in a dryland ecosystem, in Scientific Reports, 9(1), 1576-1576.
Implications of land use/land cover dynamics and Prosopis invasion on ecosystem service values in Afar Region, Ethiopia
Shiferaw Hailu, Bewket Woldeamlak, Alamirew Tena, Zeleke Gete, Teketay Demel, Bekele Ketema, Schaffner Urs, Eckert Sandra (2019), Implications of land use/land cover dynamics and Prosopis invasion on ecosystem service values in Afar Region, Ethiopia, in Science of The Total Environment, 675, 354-366.
Spatial Evolution of Prosopis Invasion and its Effects on LULC and Livelihoods in Baringo, Kenya
Mbaabu Purity Rima, Ng Wai-Tim, Schaffner Urs, Gichaba Maina, Olago Daniel, Choge Simon, Oriaso Silas, Eckert Sandra (2019), Spatial Evolution of Prosopis Invasion and its Effects on LULC and Livelihoods in Baringo, Kenya, in Remote Sensing, 11(10), 1217-1217.
Invasive alien species as drivers of rangeland degradation: The example of Prosopis.
SchaffnerUrs, RimaPurity, ShiferawHailu, EckertSandra (2019), Invasive alien species as drivers of rangeland degradation: The example of Prosopis., in Mekdaschi Studer Rima, Liniger Hanspeter (ed.), TerrAfrica; World Bank, Washington D.C., 81-84.
Performances of machine learning algorithms for mapping fractional cover of an invasive plant species in a dryland ecosystem
Shiferaw Hailu, Bewket Woldeamlak, Eckert Sandra (2019), Performances of machine learning algorithms for mapping fractional cover of an invasive plant species in a dryland ecosystem, in Ecology and Evolution, 9(5), 2562-2574.
Impacts of woody invasive alien plant species on rural livelihood: Generalized propensity score evidence from Prosopis spp. invasion in Afar Region in Ethiopia
Bekele Ketema, Haji Jema, Legesse Belaineh, Shiferaw Hailu, Schaffner Urs (2018), Impacts of woody invasive alien plant species on rural livelihood: Generalized propensity score evidence from Prosopis spp. invasion in Afar Region in Ethiopia, in Pastoralism, 8(1), 28-28.
Ensemble approach for potential habitat mapping of invasive Prosopis spp . in Turkana, Kenya
Ng Wai-Tim, Cândido de Oliveira Silva Alexsandro, Rima Purity, Atzberger Clement, Immitzer Markus (2018), Ensemble approach for potential habitat mapping of invasive Prosopis spp . in Turkana, Kenya, in Ecology and Evolution, 8(23), 11921-11931.
Economic impacts of Prosopis spp. invasions on dryland ecosystem services in Ethiopia and Kenya: Evidence from choice experimental data
Bekele Ketema, Haji Jema, Legesse Belaineh, Schaffner Urs (2018), Economic impacts of Prosopis spp. invasions on dryland ecosystem services in Ethiopia and Kenya: Evidence from choice experimental data, in Journal of Arid Environments, 158, 9-18.
Local actors’ perceptions about the impact of Prosopis on ecosystem services and land use: the case of Baringo County, Kenya. East African Agricultu
Adoyo Beatrce, ChogeSimon, HajiJema, SchaffnerUrs, Local actors’ perceptions about the impact of Prosopis on ecosystem services and land use: the case of Baringo County, Kenya. East African Agricultu, in KEFRI Science meeting .
Towards a sustainable management of invasive alien trees and shrubs in Eastern Africa: the ‘Woody Weeds’ project
SchaffnerUrs, AdoyoBeatrice, ChogeSimon, KitemeBoniface, MwihomekeMicfanaka, RImaPurity, WittArne, Towards a sustainable management of invasive alien trees and shrubs in Eastern Africa: the ‘Woody Weeds’ project, in East African Agricultural and Forestry Journal.

Collaboration

Group / person Country
Types of collaboration
Tropical Pesticides Research Institute Tanzania (Africa)
- in-depth/constructive exchanges on approaches, methods or results
Geography Department Stellenbosch University South Africa (Africa)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Ministry of Agriculture, Livestock and Fisheries Tanzania (Africa)
- in-depth/constructive exchanges on approaches, methods or results
- Research Infrastructure
Ngorongoro Conservation Area Tanzania (Africa)
- in-depth/constructive exchanges on approaches, methods or results
HOAREC (Horn of Africa Regional Enviroment Centre) Ethiopia (Africa)
- in-depth/constructive exchanges on approaches, methods or results
University of Idaho, USA United States of America (North America)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
RUKO Conservancy Kenya (Africa)
- in-depth/constructive exchanges on approaches, methods or results
Ministry of Livestock and Fisheries Ethiopia (Africa)
- in-depth/constructive exchanges on approaches, methods or results
- Research Infrastructure
Amani Nature Reserve Tanzania (Africa)
- in-depth/constructive exchanges on approaches, methods or results
- Research Infrastructure
Ethiopian Institute of Agricultural Research Ethiopia (Africa)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel
CSIR Natural Resources and the Environment South Africa (Africa)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
Internatonal Livestock Research Institute Ethiopia (Africa)
- in-depth/constructive exchanges on approaches, methods or results
Ministry of Agriculture, Plant Health Services Tanzania (Africa)
- in-depth/constructive exchanges on approaches, methods or results
University of Natural Resources and Life Sciences (BOKU) Austria (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
Nelson Mandela Institute of Science and Technology Tanzania (Africa)
- in-depth/constructive exchanges on approaches, methods or results
Tanzania Forest Conservation Group (TFCG) Tanzania (Africa)
- in-depth/constructive exchanges on approaches, methods or results
- Industry/business/other use-inspired collaboration
Tanzania Natural Resources Forum (TNRF) Tanzania (Africa)
- in-depth/constructive exchanges on approaches, methods or results
Care Prime Ethiopia (Africa)
- in-depth/constructive exchanges on approaches, methods or results
Afar Pastoral and Agropastoral Bureau Ethiopia (Africa)
- in-depth/constructive exchanges on approaches, methods or results
Northern Rangeland Trust Kenya (Africa)
- in-depth/constructive exchanges on approaches, methods or results

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
Addis Ababa University Research Week of 2019 Talk given at a conference Estimation of current fractional cover gradient of invasive trees: the genus Prosopis spp. and drivers of its invasion in the Afar Region, Ethiopia 27.05.2019 Addis Ababa, Ethiopia Alamirew Tena;
4th Open Science Meeting Talk given at a conference Spatial-temporal processes in co-designing sustainable land management 24.04.2019 Bern, Bermuda Ehrensperger Albrecht; Schaffner Urs;
3rd Croatian Invasive Species Conference Talk given at a conference Livelihood impacts of woody invasive alien species in Eastern Africa 23.11.2018 Zagreb, Croatia Schaffner Urs;
Meeting of National Task Force for Management of Invasive Species Talk given at a conference Mitigating effects of Invasive Species 29.09.2018 Dar es Salaam, Tanzania Richard John;
NEOBIOTA 2018. 10th International Conference on Biological Invasion: New Directions in Invasion Biology Talk given at a conference Prosopis invasion in East Africa: species identity, ploidy and increased invasive potential 03.09.2018 Dublin, Ireland Le Roux Johannes; Schaffner Urs;
XV International Symposium on Biological Control of Weeds, Engelberg, Switzerland Talk given at a conference Quantifying the economic and social benefits of biological control 18.08.2018 Engelberg, Switzerland Schaffner Urs;
KEFRI’s 5th Scientific Conference Talk given at a conference Local actors' perceptions about the implications of Prosopis on ecosystem services and land use 16.04.2018 Nairobi, Kenya Choge Simon; Schaffner Urs;
Workshop on Economic and Ecological Impacts of Invasive Alien Species Talk given at a conference Livelihood impacts of woody invasive alien species in Eastern Africa 21.02.2018 Kolkata, India Schaffner Urs;
University seminar Individual talk Activities of CABI and Woody Weeds Project 16.01.2018 Morogoro, Tanzania Richard John;


Self-organised

Title Date Place
WLRC Dissemination Workshop 25.02.2019 Bahir Dar, Ethiopia

Knowledge transfer events

Active participation

Title Type of contribution Date Place Persons involved
National Prosopis Strategy preparation meeting Workshop 17.06.2019 Nairobi, Kenya Choge Simon;
Courtesy call from KEFRI Directorate Workshop 06.05.2019 Nairobi, Kenya Schaffner Urs; Kiteme Boniface; Choge Simon;
Prosopis research in Ethiopia Workshop 16.01.2019 Addis Ababa, Ethiopia Alamirew Tena; Schaffner Urs;


Self-organised

Title Date Place
Local Implementation Group: Workshop 2A - Baringo 04.04.2019 Baringo, Kenya
Local Implementation Group: Works shop 1A - Baringo 17.01.2019 Baringo, Kenya
Local Implementation Group: Workshop 2 - Amani 10.12.2018 Amani, Tanzania
Local Implementation Group: Workshop 2: Afar 07.12.2018 Awash Arba, Ethiopia
Local Implementation Group: Workshop 2B- Baringo 18.10.2018 Baingo, Kenya
National Prosopis Stakeholder Meeting 16.09.2018 Bishoftu, Ethiopia
Local Implementation Group: Workshop 2 - Moshi 10.09.2018 Moshi, Tanzania
Local Implementation Group: Workshop 1B - Baringo 04.04.2018 Baringo, Kenya
Local Implementation Group: Workshop 1 - Moshi 13.03.2018 Moshi, Tanzania
Local Implementation Group: Workshop 1 - Amani 19.02.2018 Amani, Tanzania
Stakeholder Meeting 26.01.2018 Moshi, Tanzania
Local Implementation Group: Workshop 1 - Afar 08.01.2018 Awash Arba, Austria

Communication with the public

Communication Title Media Place Year
Media relations: print media, online media Alien tree threatening livelihoods mapped in Ethiopia Scidev.net International 2019
Media relations: print media, online media An invasive, thorny tree is taking over Africa—can it be stopped? National Geographics International 2019
Media relations: print media, online media CABI helps map ferocious speed and likely cause of woody weed spread across Ethiopia Eurekalert International 2019
Print (books, brochures, leaflets) Effective methods for removal of Prosopis trees in early invasion stages International 2019
Media relations: print media, online media Ethiopia: New Study Reveals the Massive Ecological and Economic Impacts of Woody Weed Invasion in Et AllAfrica International 2019
Media relations: print media, online media Kenya faces devastating Prosopis invasion: What can be done The Conversation International 2019
Media relations: print media, online media New study reveals the massive ecological and economic impacts of woody weed invasion in Ethiopia ScienceDaily International 2019
Other activities Project posters to inform local stakeholders International 2019
Print (books, brochures, leaflets) Prosopis: an imminent threat to our livelihoods International 2019
Media relations: radio, television Research at TAFORI Station in Lushoto Tanzania Broadcasting Company (TBC) International 2019
Media relations: print media, online media Researchers map ferocious speed and likely cause of woody weed spread across Ethiopia phys.org International 2019
Media relations: print media, online media Scientists recommend measures to contain rapid woody weed spread in Baringo County, Kenya https://phys.org International 2019
Video/Film Spread of Prosopis in Kenya International 2019
Media relations: radio, television Prosopis management and sustainable land management National Ethiopian Radio International 2018
Media relations: radio, television Woody Weeds and Research Activities at Lushoto, Tanzania Tanzania Broadcasting Company (TBC) International 2018
Media relations: radio, television Woody Weeds: Managing Prosopis in Tanzania RFI - Swahili Radio and also at https://mwambawahabari.co.tz/2018/02/01/watafiti-watakiwa-kukabilian International 2018

Awards

Title Year
Gerald Lwomile from Sokoine University received the "Excellence in journalism" award in Tourism and Conservation, issued by Media Council of Tanzania (MCT) Gerald is the videographer who was involved in filming the woody weeds video on Prosopis invasion in Moshi.The video was submitted to the Media Council of Tazania for evaluation and ranked the second best for conservation .The video can be found here [https://youtu.be/ayXQ9J3Hp1g] 2019
The PHD student at Stellenbosch University, Maria Loreto Castillo, received an Overseas Conference Grant from the Postgraduate Office, Stellenbosch University, South Africa, to attend the NEOBIOTA 2018. 10th International Conference on Biological Invasion. 2018

Associated projects

Number Title Start Funding scheme
152085 Woody invasive alien species in East Africa: assessing and mitigating their negative impact on ecosystem services and rural livelihood 01.01.2015 r4d (Swiss Programme for Research on Global Issues for Development)
192909 Supporting the implementation of sustainable woody invasive alien species management across multiple spatial scales in Kenya 01.02.2020 Transformation Accelerating Grant

Abstract

Invasive alien species (IAS) are key drivers of human-caused global environmental change as they threaten biodiversity and ecosystem services (ES). Woody plant species were repeatedly introduced in areas outside their native range, because they can provide goods and services to the rural poor. Several of these woody species have escaped cultivation and invaded agricultural and natural ecosystems, where their negative impacts on ES and human well-being progressively exceed the benefits local actors can derive from them. The overarching goal of our project is to help mitigate the negative impacts of woody IAS on ecosystem services and human well-being in East Africa. To achieve this goal, our multi-disciplinary consortium will generate and avail knowledge on invasion processes and on context-dependent environmental and socio-economic impacts of woody IAS, elaborate innovative control measures and develop and document Sustainable Land Management strategies that mitigate the negative impacts of woody IAS in East Africa.
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