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Pollination Services from Insects in Homegardens in the Chengdu Plain will be Confronted with Crises

Author

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  • Qin Liu

    (Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China
    Wanzhou Key Regional Ecology and Environment Monitoring Station of Three Gorges Project Ecological Environmental Monitoring System, Wanzhou 404020, China
    College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China)

  • Pei Xu

    (Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China
    Wanzhou Key Regional Ecology and Environment Monitoring Station of Three Gorges Project Ecological Environmental Monitoring System, Wanzhou 404020, China)

  • Kun Yan

    (Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China
    Wanzhou Key Regional Ecology and Environment Monitoring Station of Three Gorges Project Ecological Environmental Monitoring System, Wanzhou 404020, China)

  • Yingman Guo

    (Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China
    Wanzhou Key Regional Ecology and Environment Monitoring Station of Three Gorges Project Ecological Environmental Monitoring System, Wanzhou 404020, China)

Abstract

Chengdu Plain is one of China’s most important agricultural production zones and has a large human population. Agricultural crops require insect pollination to increase yield and quality, which is especially important in plains areas where forest area is small. Homegardens are the main habitat of pollinators. The present study identified the importance of insect pollination in homegardens in the Chengdu Plain through field investigations and comparative experiments and revealed the risk to pollination services caused by the decrease in diversity and population of managed and wild pollinators. The results showed that (1) prohibiting all insect pollination (treatment A) and prohibiting managed bee pollination (treatment B) significantly reduced the yield and seed number of rapeseed and significantly reduced the size, weight, and sweetness of peach fruit, but had no significant effects on plums; (2) the dependence on insect pollination and the economic values of insect pollination for rapeseed and peaches are 0.56 and $85.1 million and 0.44 and $31.0 million, respectively; (3) there were 23 flower-visiting pollinator species at the experimental sites including: four species of managed bees and 19 species of wild pollinators. The peak time for pollinators to visit flowers was 11:00 to 15:00, and the managed bees accounted for over 67.55% of these visits; (4) within a radius of 1000 m from the site, 58.06% of the bees were non-locally managed, and the bee population managed locally by farmers decreased; and (5) compared with 2008, the number of homegardens decreased by 17.24%, the managed bees within the homegardens decreased by 62.05%, and the disappearance and destruction of homegardens led to a significant reduction in wild pollinators.

Suggested Citation

  • Qin Liu & Pei Xu & Kun Yan & Yingman Guo, 2019. "Pollination Services from Insects in Homegardens in the Chengdu Plain will be Confronted with Crises," Sustainability, MDPI, vol. 11(7), pages 1-15, April.
    • Handle: RePEc:gam:jsusta:v:11:y:2019:i:7:p:2169-:d:221886
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    References listed on IDEAS

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    1. Mohri, Hideyuki & Lahoti, Shruti & Saito, Osamu & Mahalingam, Anparasan & Gunatilleke, Nimal & Irham, & Hoang, Van Thang & Hitinayake, Gamini & Takeuchi, Kazuhiko & Herath, Srikantha, 2013. "Assessment of ecosystem services in homegarden systems in Indonesia, Sri Lanka, and Vietnam," Ecosystem Services, Elsevier, vol. 5(C), pages 124-136.
    2. Gallai, Nicola & Salles, Jean-Michel & Settele, Josef & Vaissière, Bernard E., 2009. "Economic valuation of the vulnerability of world agriculture confronted with pollinator decline," Ecological Economics, Elsevier, vol. 68(3), pages 810-821, January.
    3. Melathopoulos, Andony P. & Cutler, G. Christopher & Tyedmers, Peter, 2015. "Where is the value in valuing pollination ecosystem services to agriculture?," Ecological Economics, Elsevier, vol. 109(C), pages 59-70.
    4. Winfree, Rachael & Gross, Brian J. & Kremen, Claire, 2011. "Valuing pollination services to agriculture," Ecological Economics, Elsevier, vol. 71(C), pages 80-88.
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    Cited by:

    1. Shuang Wu & Ning Wu & Bo Zhong, 2020. "What Ecosystem Services Flowing from Linpan System—A Cultural Landscape in Chengdu Plain, Southwest China," Sustainability, MDPI, vol. 12(10), pages 1-22, May.

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