The importance of monkey beetle (Scarabaeidae: Hopliini) pollination for Aizoaceae and Asteraceae in grazed and ungrazed areas at Paulshoek, Succulent Karoo, South Africa

Mayer, Carolin; Soka, Geoffrey; Picker, Mike D.

doi:10.1007/s10841-006-9006-0

Cited by 34 publications

(28 citation statements)

References 22 publications

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“…49 Furthermore, the impact of overgrazing on pollinators has also been shown to have negative impacts through the loss of host plants and trampling of nesting sites. [50][51][52][53] Interestingly, Vrdoljak and Samways 54 found that levels of flower visitor richness within agricultural mosaics can be similar to protected areas, suggesting the potential for natural or semi-natural habitat to facilitate movement of individuals and act as a repository for pollinators. Without long-term monitoring of pollinator populations to assess trends over time, little inference can be made about such changes in wild pollinator populations or their effects on pollination services.…”

Section: Importance Of Pollinator Species For South African Crop Prodmentioning

confidence: 99%

Pollination ecosystem services in South African agricultural systems

et al. 2014

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Insect pollinators, both managed and wild, have become a focus of global scientific, political and media attention because of their apparent decline and the perceived impact of this decline on crop production. Crop pollination by insects is an essential ecosystem service that increases the yield and quality of approximately 35% of crops worldwide. Pollinator declines are a consequence of multiple environmental pressures, e.g. habitat transformation and fragmentation, loss of floral resources, pesticides, pests and diseases, and climate change. Similar environmental pressures are faced in South Africa where there is a high demand for pollination services. In this paper, we synthesise data on the importance of different pollinators as a basis for services to South African crops and on the status of managed honeybees. We also focus on insect pollination services for the Western Cape deciduous fruit industry, which is worth ZAR9800 million per year and is heavily reliant on pollination services from managed honeybees. We discuss landscape and regional level floral resources needed to maintain sufficient numbers of managed honeybee colonies. In summary, the available literature shows a lack of data on diversity and abundance of crop pollinators, and a lack of longterm data to assess declines. We highlight key areas that require research in South Africa and emphasise the critical role of floral resource availability at the landscape and regional scale to sustain pollinators. We conclude that understanding the dynamics of how floral resources are used will help inform how landscapes could be better managed in order to provide long-term sustainable pollination services.

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Section: Importance Of Pollinator Species For South African Crop Prodmentioning

confidence: 99%

Pollination ecosystem services in South African agricultural systems

et al. 2014

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“…More specifically, grazing can: (i) alter the population density and diversity of entomophilous plants considerably (Vazquez and Simberloff, 2004;Chaideftou et al, 2011); and (ii) directly or indirectly change the abundance and availability of floral resources (Vulliamy, 2003;Ågren et al, 2006;Mayer et al, 2006). With respect to insect pollinators, grazing can: (i) influence the foraging behaviour of pollinators because of a change in floral rewards (Chittka et al, 1999;Vohland et al, 2005), or influence their movement when, for example, grazing alters the height of the vegetation (Goulson, 2000); (ii) influence the number of nesting sites available to ground-dwelling wild pollinators by causing an expansion of areas of bare soil, which are favoured nesting sites (Petanidou and Ellis, 1996;Potts et al, 2003a), or alter the availability of water, that is essential for nest construction (Gess and Gess, 1993;Vinson et al, 1993); (iii) directly influence the survival rate of pollinators by trampling of the grazing animals (Sjödin, 2007) or indirectly, by decreasing the extent of shelters in the vegetation (Potts et al, 2009); and (iv) increase the abundance of bees whereas the influence on their diversity remains unknown (Vulliamy et al, 2006).…”

Section: In the Aegeanmentioning

confidence: 99%

Investigating plant—pollinator relationships in the Aegean: the approaches of the project POL-AEGIS (The pollinators of the Aegean archipelago: diversity and threats)

Petanidou

Ståhls

Vujić

et al. 2013

Journal of Apicultural Research

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SummaryWorldwide, there is a well-documented crisis for bees and other pollinators which represent a fundamental biotic capital for wild life conservation, ecosystem function, and crop production. Among all pollinators of the world, bees (Hymenoptera: Apoidea) constitute the major group in species number and importance, followed by hover flies (Diptera: Syrphidae). The Aegean constitutes one of the world's hotspots for wild bee and other pollinator diversity including flies (mainly hover flies and bee flies), beetles, and butterflies. Despite this advantage, our present knowledge on Greek pollinators is poor, due to a lack of focused and systematic research, absence of relevant taxonomic keys, and a general lack of taxonomic experts in the country. As a result, assessments of pollinator loss cannot be carried out and the causes for the potential pollinator loss in the country remain unknown. Consequently, the desperately needed National Red Data list for pollinators cannot be compiled. This new research (2012)(2013)(2014)(2015) aims to contribute to the knowledge of the pollinator diversity in Greece, the threats pollinators face, as well as the impacts these threats may have on pollination services. The research is conducted in the Aegean archipelago on >20 islands and several mainland sites in Greece and Turkey. Prime goals are: i. the assessment of bee and hover fly diversity (species, genetic);ii. their pollination services; and iii. the effects of climate change, grazing, intensive bee-keeping, fires, electromagnetic radiation on bee diversity and ecology, as well as on plant-pollinator networks. At the same time, this research contributes to the taxonomic capital in Greece and the Eastern Mediterranean, focusing on the creation of the first identification keys for pollinators, the training of new scientists, as well as the enrichment and further development of the Melissotheque of the Aegean, a permanent reference collection of insect pollinators established at the

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“…As a consequence, pollinating insects are influenced by the extent, intensity, and type of grazing (Carvell, ; Kruess & Tscharntke, ; Sjödin, ). The largest effects of grazing on pollinators have been related to its effects on the amount and composition of floral resources (Mayer et al ., ; Roulston & Goodell, ). This is because grazing alters the population density of entomophilous plants, thus flower cover and diversity (Vazquez & Simberloff, ; Mayer et al ., ; Xie et al ., ), and the floral community has been reported as the best predictor of pollinator abundance in pastures (Carvell, ; Sjödin, ; Kearns & Olivera, ).…”

Section: Introductionmentioning

confidence: 99%

Effects of grazing intensity on pollinator abundance and diversity, and on pollination services

Lázaro

Tscheulin

Devalez

et al. 2016

Ecological Entomology

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1. Pollinating insects provide important ecosystem services and are influenced by the intensity of grazing. Based on the Intermediate Disturbance Hypothesis (IDH), pollinator diversity is expected to peak at intermediate grazing intensities. However, this hump‐shaped relationship is rarely found. 2. The effect of grazing intensity was tested on flower cover, on the abundance and richness of bees, hoverflies and bee flies, and on pollination services to early‐flowering bee‐pollinated Asphodelus ramosus L. For that, we used data on 11 plant–pollinator phryganic communities from Lesvos Island (Greece) widely differing in grazing intensities. 3. Flower abundance and richness showed hump‐shaped relationships with grazing intensity. Grazing affected the abundance and richness of bees and hoverflies directly and also indirectly, through changes in the flower community. Grazing influenced directly the richness but not the abundance of bee flies. Overall, pollinator abundance and richness showed hump‐shaped relationships with grazing intensity, but variations in strength (hoverfly abundance) and direction (bee community) of the effect appeared along the season. Early in the season, grazing increased bee abundance but decreased richness, resulting in increased pollen limitation in A. ramosus. 4. The effects of grazing on pollinators vary with the intensity of the disturbance, generally supporting the IDH, and the timing of land‐use activities may influence pollination services. Management strategies should include moderate grazing levels to preserve overall diversity in this area, however, the conservation of particular early bee or bee‐pollinated species may benefit from reduced grazing in early spring.

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The importance of monkey beetle (Scarabaeidae: Hopliini) pollination for Aizoaceae and Asteraceae in grazed and ungrazed areas at Paulshoek, Succulent Karoo, South Africa

Cited by 34 publications

References 22 publications

Pollination ecosystem services in South African agricultural systems

Pollination ecosystem services in South African agricultural systems

Investigating plant—pollinator relationships in the Aegean: the approaches of the project POL-AEGIS (The pollinators of the Aegean archipelago: diversity and threats)

Effects of grazing intensity on pollinator abundance and diversity, and on pollination services

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