Distance and quality of natural habitat influence hawkmoth pollination of cultivated papaya
- 1 September 2009
- journal article
- research article
- Published by Springer Science and Business Media LLC in International Journal of Tropical Insect Science
- Vol. 29 (03), 114-123
- https://doi.org/10.1017/s1742758409990208
Abstract
Crop pollination by wild pollinators is an ecosystem service of immense value to modern agriculture. Pollination by wild insects is under-researched in the tropics, where many crops may require or benefit from wild pollinators. Papaya is a dioecious tree crop widely cultivated throughout the tropics. In East Africa, papaya is an important component of rural smallholder farming systems. Traditional agricultural systems are currently under stress due to landscape degradation. These trends are of special concern with respect to pollination services provided by wild insects. Investigation of the role of hawkmoths as pollinators of papaya on subsistence farms in Kenya was conducted over a period of 3 years. Hawkmoths were the most abundant and reliable visitors to both ‘female’ pistillate and ‘male’ staminate papaya flowers. Hawkmoths accounted for >95% of legitimate visits and xenogamous pollination of papaya flowers. Hippotion celerio, Nephele comma and Agrius convolvuli were the main pollinators. Sites in two districts with similar climates and natural vegetation, but different levels of habitat degradation were chosen for comparison of pollinators and pollination services. Hawkmoth abundance and visitation rates declined sharply with increasing distance of natural habitat patches from the crop. Fruit set was also reduced at sites with high levels of disturbance/poor agricultural practices. Natural habitat containing larval food plants and other nectar resources for hawkmoths therefore supports adjacent cultivated papaya with pollination services. Understanding the links between wild biodiversity, in this case pollinating hawkmoths, and agricultural productivity can help bridge the gap between agricultural development and biodiversity conservation.Keywords
This publication has 26 references indexed in Scilit:
- Hawkmoth pollination of aerangoid orchids in Kenya, with special reference to nectar sugar concentration gradients in the floral spursAmerican Journal of Botany, 2007
- Importance of pollinators in changing landscapes for world cropsProceedings Of The Royal Society B-Biological Sciences, 2006
- Temporally persistent patterns of incidence and abundance in a pollinator guild at annual and decadal scales: the bees of Larrea tridentataBiological Journal of the Linnean Society, 2005
- Fruiting failure and limited recruitment in remnant populations of the hawkmoth-pollinated tree Oxyanthus pyriformis subsp. pyriformis (Rubiaceae)Biological Conservation, 2004
- Why do pollination generalist and specialist plant species show similar reproductive susceptibility to habitat fragmentation?Journal of Ecology, 2004
- Fruit set of highland coffee increases with the diversity of pollinating beesProceedings Of The Royal Society B-Biological Sciences, 2003
- Effects of habitat fragmentation on pollination: pollinators, pollinia viability and reproductive successJournal of Ecology, 2002
- The floral development and anatomy of Carica papaya (Caricaceae)Canadian Journal of Botany, 1999
- Insect pollinators and sustainable agricultureAmerican Journal of Alternative Agriculture, 1990
- Additional Observations on Temperate North American Hawkmoth FlowersBotanical Gazette, 1985