Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Doctorat → Norvège → Crop pollination by insects in small-scale agroforestry farming in Tanzania

Norwegian University of Life Sciences, Ås (2019)

Crop pollination by insects in small-scale agroforestry farming in Tanzania

Sawe, Thomas Corodius

Titre : Crop pollination by insects in small-scale agroforestry farming in Tanzania

Insektpollinering av landbruksvekster i småskala jordbruk i Tanzania

Auteur : Sawe, Thomas Corodius

Université de soutenance : Norwegian University of Life Sciences, Ås

Grade : Philosophiae Doctor (PhD) 2019

Résumé
Context. The decline of pollinating insects worldwide threatens pollination services for wild angiosperms and important food crops. The importance of insect pollination services for food production has been documented for crops that are available on the global markets, and which stem from large-scale farming systems. Little effort has been directed towards understanding the role of insect pollinators in small-scale farming systems in developing countries, even though these systems feed a substantial part of the World’s population.

Objective. I studied crop pollination by insects in a small-scale agroforestry farming system in the Kilimanjaro and Arusha regions in northern Tanzania. I assessed to which degree crop yield was limited by insect pollination ; how environmental context and agricultural practices influenced pollinators, and consequently pollination and crop yield ; to which degree local farmers were aware of pollinators ; and local farmers’ potential vulnerability to changes in pollination services, in terms of declines in household income and food availability.

Methods. I carried out a combination of observational and experimental ecological studies in a total of 24 local small-scale agroforestry type farms, and interviewed 147 local farmers, to assess the importance of insect pollination for production of watermelons (Citrullus lanatus Thunb., Cucurbitaceae). Insect pollination is essential for fruit development in watermelons, and watermelon is an important cash crop to local farmers in my study area.

Présentation

Version intégrale (3,5 Mb)

Page publiée le 7 avril 2022