The Economic Impacts of Pollinator Declines: An Approach to Assessing the Consequences

Kevan, Peter G.; Phillips, Truman P.

doi:10.5751/es-00272-050108

Cited by 178 publications

(140 citation statements)

References 40 publications

(19 reference statements)

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“…As their services are increasingly being recognized for agriculture (e.g. O'Toole 1993;Cane 1997b;Kevan & Phillips 2001;Klein et al 2003a;Slaa et al 2006), the adequate management of local agro-ecosystems and the conservation of suitable natural or semi-natural pollinator habitats in the surrounding landscapes are receiving more attention. Little information exists on the ways in which local management influences agricultural pollination (Richards 2001).…”

Section: Resultsmentioning

confidence: 99%

“…Pollination by wild animals is a key ecosystem service. Although crop pollination is commonly cited as an example of an endangered ecosystem service Williams 1994;Ingram et al 1996;Matheson et al 1996;AllenWardell et al 1998;Kearns et al 1998;Kevan & Phillips 2001;Steffan-Dewenter et al 2005, but see Ghazoul 2005, detailed studies of the crop pollination systems are incomplete or out of date. Animal pollination is important to the sexual reproduction of many crops (McGregor 1976;Crane & Walker 1984;Free 1993;Williams 1994;Nabhan & Buchmann 1997;Westerkamp & Gottsberger 2000) and the majority of wild plants (Burd 1994;Kearns et al 1998;Larson & Barrett 2000;Ashman et al 2004), which can also be important for providing calories and micronutrients for humans (Sundriyal & Sundriyal 2004).…”

Section: Introductionmentioning

confidence: 99%

“…Both studies are less relevant today, because many new crop varieties and pollination studies are available. To adequately evaluate the importance of animal pollination for plant products in our food supply, and for economic analyses of crop pollination by animals, we need a global review of crops considering their breeding systems, their flowervisiting fauna and the level of production increase resulting from animal visitation and pollination, as supported by experimental evidence (Kevan & Phillips 2001).…”

Section: Introductionmentioning

confidence: 99%

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Importance of pollinators in changing landscapes for world crops

et al. 2006

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The extent of our reliance on animal pollination for world crop production for human food has not previously been evaluated and the previous estimates for countries or continents have seldom used primary data. In this review, we expand the previous estimates using novel primary data from 200 countries and found that fruit, vegetable or seed production from 87 of the leading global food crops is dependent upon animal pollination, while 28 crops do not rely upon animal pollination. However, global production volumes give a contrasting perspective, since 60% of global production comes from crops that do not depend on animal pollination, 35% from crops that depend on pollinators, and 5% are unevaluated. Using all crops traded on the world market and setting aside crops that are solely passively self-pollinated, windpollinated or parthenocarpic, we then evaluated the level of dependence on animal-mediated pollination for crops that are directly consumed by humans. We found that pollinators are essential for 13 crops, production is highly pollinator dependent for 30, moderately for 27, slightly for 21, unimportant for 7, and is of unknown significance for the remaining 9. We further evaluated whether local and landscape-wide management for natural pollination services could help to sustain crop diversity and production. Case studies for nine crops on four continents revealed that agricultural intensification jeopardizes wild bee communities and their stabilizing effect on pollination services at the landscape scale.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Importance of pollinators in changing landscapes for world crops

et al. 2006

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“…Pollinator shortage can lead to reduced crop quality and yield, with potentially large economic impact (Kevan & Phillips, 2001). Therefore, much research has been carried out on responses of bee communities to human impacts such as land‐use change and intensification.…”

Section: Introductionmentioning

confidence: 99%

Impact of human disturbance on bee pollinator communities in savanna and agricultural sites in Burkina Faso, West Africa

Stein

Stenchly

Coulibaly

et al. 2018

Ecology and Evolution

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All over the world, pollinators are threatened by land‐use change involving degradation of seminatural habitats or conversion into agricultural land. Such disturbance often leads to lowered pollinator abundance and/or diversity, which might reduce crop yield in adjacent agricultural areas. For West Africa, changes in bee communities across disturbance gradients from savanna to agricultural land are mainly unknown. In this study, we monitored for the impact of human disturbance on bee communities in savanna and crop fields. We chose three savanna areas of varying disturbance intensity (low, medium, and high) in the South Sudanian zone of Burkina Faso, based on land‐use/land cover data via Landsat images, and selected nearby cotton and sesame fields. During 21 months covering two rainy and two dry seasons in 2014 and 2015, we captured bees using pan traps. Spatial and temporal patterns of bee species abundance, richness, evenness and community structure were assessed. In total, 35,469 bee specimens were caught on 12 savanna sites and 22 fields, comprising 97 species of 32 genera. Bee abundance was highest at intermediate disturbance in the rainy season. Species richness and evenness did not differ significantly. Bee communities at medium and highly disturbed savanna sites comprised only subsets of those at low disturbed sites. An across‐habitat spillover of bees (mostly abundant social bee species) from savanna into crop fields was observed during the rainy season when crops are mass‐flowering, whereas most savanna plants are not in bloom. Despite disturbance intensification, our findings suggest that wild bee communities can persist in anthropogenic landscapes and that some species even benefitted disproportionally. West African areas of crop production such as for cotton and sesame may serve as important food resources for bee species in times when resources in the savanna are scarce and receive at the same time considerable pollination service.

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“…The accelerating losses of natural habitats in the State of Mato Grosso do Sul, including the Pantanal, are primarily driven by this region`s harboring one of the largest herds of beef cattle in Brazil and thousands kilometers are used mainly for soybean crop (Harris et al 2005). Given the key role bee pollinators play in wild and agricultural ecosystems (Kevan & Phillips 2001, Kevan & Imperatriz-Fonseca 2002, Murray et al 2009), we present a list of plant species visited by bees and species of bees occurring in natural forest patches in the Brazilian Pantanal wetland. This is the first reported survey of bees from Southern Pantanal, representing new records of some species for the state of Mato Grosso do Sul.…”

Section: Introductionmentioning

confidence: 99%

Bees (Hymenoptera: Apoidea) and flowers in natural forest patches of southern Pantanal

2013

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This is the first systematic survey of bees in the Pantanal wetland, Brazil. We recorded bee species and their floral resources within grassland and natural forest edge habitats in the Pantanal. Surveys were conducted during two to four-days per month, for a total of 12 months. Overall, we recorded 56 bee species visiting a total of 63 flowering plants. Asteraceae and Fabaceae presented the highest number of visited species, however Hyptis suaveolens (Lamiaceae) was the plant most visited by different bee species (18). The most generalist native bee was Trigona fuscipennis visiting a total of 17 flowering plant species. Apis mellifera , an exotic bee, visited 27 species. We also report the overlap (37.5%) in the use of floral resources between the exotic bee Apis mellifera and native bee species. Our updated bee checklist here presented includes 10 new records for the State of Mato Grosso do Sul. These data will support management strategies targeting the conservation of plant-pollinator interactions in the Pantanal ecosystem. Resumo: Esta é a primeira amostragem sistemática de abelhas realizada no Pantanal, Brasil. Nós coletamos espécies de abelhas bem como as plantas que utilizaram como recurso floral em áreas de pastagens naturais e bordas de áreas florestadas. As coletas foram conduzidas durante dois a quatro dias a cada mês, durante 12 meses. Foram registradas 56 espécies de abelhas visitando um total de 63 espécies de plantas. As famílias Asteraceae e Fabaceae apresentaram o maior numero de espécies visitadas, entretanto Hyptis suaveolens (Lamiaceae) foi a espécie visitada pelo maior número de espécies diferentes de abelhas (18). A abelha nativa mais generalista encontrada foi Trigona fuscipennis , que visitou 17 espécies de plantas. Apis mellifera , uma espécie exótica, visitou 27 espécies. Reportamos também a sobreposição (37,5%) no uso de recursos florais entre A. mellifera e espécies de abelhas nativas. A listagem de abelhas aqui apresentada inclui 10 espécies ainda não mencionadas para o estado de Mato Grosso do Sul. Esses dados apoiarão estratégias de manejo focadas na conservação das interações entre plantas e polinizadores no ecossistema Pantanal. Palavras-chave: abelhas, visitantes florais, fragmentos florestais, inventários. 47Bees and flowers of southern Pantanal

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The Economic Impacts of Pollinator Declines: An Approach to Assessing the Consequences

Abstract: Abstract•

Cited by 178 publications

References 40 publications

Importance of pollinators in changing landscapes for world crops

Importance of pollinators in changing landscapes for world crops

Impact of human disturbance on bee pollinator communities in savanna and agricultural sites in Burkina Faso, West Africa

Bees (Hymenoptera: Apoidea) and flowers in natural forest patches of southern Pantanal

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