Are managed pollinators ultimately linked to the pollination ecosystem service paradigm?

Veldtman, Ruan

doi:10.17159/sajs.2018/a0292

Cited by 6 publications

(4 citation statements)

References 30 publications

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“…Eristalinus (Diptera) individuals carried the largest pollen loads, a high proportion of which was P. angustifolia pollen. As the species observed (especially A. mellifera ) are typical generalist pollinators of many plant species in South Africa [ 46 ], this plant species is thus highly likely not to be pollen-limited outside of its native range. Nevertheless, visitation does not always equate to pollen deposition and successful reproduction, and a more in-depth study of the contribution of these insect visitors to seed set needs to be conducted [ 5 ].…”

Section: Discussionmentioning

confidence: 99%

Reproductive Ecology of the Invasive Alien Shrub Pyracantha angustifolia in the Grassland Biome, South Africa

Adams

Giovannoni

Clark

et al. 2023

Plants

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Knowledge on reproductive traits of problematic invasive alien plants, such as the woody invasive shrub Pyracantha angustifolia of temperate Chinese origin, can help better manage invasive species. To determine factors contributing to its invasion, we investigated floral visitors and pollen loads, self-compatibility, seed set, seed rain, soil seed banks, and seed longevity in the soil. Generalist insects were recorded visiting flowers and all carried pollen loads of high purity (>70%). Floral visitor exclusion experiments showed that P. angustifolia can set seed (66%) without pollen vectors, although natural pollination resulted in higher fruit set (91%). Fruit count surveys and seed set showed an exponentially increased relationship between seed set and plant size with high natural seed yield (±2 million seeds m−2). Soil core samples revealed a high seed density of 46,400 ± (SE) 8934 m−2 under shrubs, decreasing with distance away from the shrub. Bowl traps stationed under trees and fences confirmed that seeds were efficiently dispersed by animals. Buried seeds survived for less than six months in the soil. Due to high seed production, self-compatibility augmented by generalist pollen vectors, and effective seed dispersal by local frugivores, it is difficult to manage the spread manually. Management of this species should focus on the short life span of seeds.

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Section: Discussionmentioning

confidence: 99%

Reproductive Ecology of the Invasive Alien Shrub Pyracantha angustifolia in the Grassland Biome, South Africa

Adams

Giovannoni

Clark

et al. 2023

Plants

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“…Finally, another benefit brought by the inclusion of bees for income diversification is the increase in productivity and quality in crops that results in an economic benefit from the ecosystem service provided by bees in pollination (Acosta, González-Martínez, & Vargas, 2017;Veldtman et al 2018), which for the same association AGROPASUNCHA during the years 2015-2016 presented an increase of 15% in both quality and performance (Acosta, Rodríguez, González-Martínez, Cuervo, & Vargas, 2019).…”

Section: Discussionmentioning

confidence: 99%

Chemical Profiles of Polyphenols in Aqueous Infusion of Yerba Mate and Tea Mate (Ilex Paraguariensis) From Argentina, Brazil and Uruguay

Panzl¹,

Trías²,

Menchaca³

et al. 2020

Resultados Econômicos E De Sustentabilidade Nos Sistemas Nas Ciências Agrárias

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Editora Direitos para esta edição cedidos à Atena Editora pelos autores. Todo o conteúdo deste livro está licenciado sob uma Licença de Atribuição Creative Commons. Atribuição 4.0 Internacional (CC BY 4.0). O conteúdo dos artigos e seus dados em sua forma, correção e confiabilidade são de responsabilidade exclusiva dos autores, inclusive não representam necessariamente a posição oficial da Atena Editora. Permitido o download da obra e o compartilhamento desde que sejam atribuídos créditos aos autores, mas sem a possibilidade de alterá-la de nenhuma forma ou utilizá-la para fins comerciais. A Atena Editora não se responsabiliza por eventuais mudanças ocorridas nos endereços convencionais ou eletrônicos citados nesta obra. Todos os manuscritos foram previamente submetidos à avaliação cega pelos pares, membros do Conselho Editorial desta Editora, tendo sido aprovados para a publicação.

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“…Concerns regarding such impacts arose as early as in the 1980s (Cooke, 1982) and are still hotly debated (Melin et al, 2014;Masehela, 2017). Eucalypts are extremely important for beekeepers as they facilitate the survival of bee colonies in agricultural landscapes (Figure 4e; Hutton-Squire, 2014; Melin et al, 2014;Veldtman, 2018). In the Western Cape, the situation is especially complicated because the Cape honeybee (Apis mellifera capensis) is considered an invasive species in other South African provinces; beekeepers are therefore not allowed to move bees in and out of this province to seek alternative forage sites (van Wilgen, 2007).…”

Section: Apiculturementioning

confidence: 99%

Eucalyptus camaldulensisin South Africa – past, present, future

Hirsch

Allsopp

Canavan

et al. 2019

Transactions of the Royal Society of South Africa

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Eucalyptus camaldulensis can be seen as an iconic tree of superlatives. It is the eucalypt with the widest native range, and one of the most widely planted eucalypts around the globe. In South Africa, it is the most widespread and the most aggressively invasive eucalypt. It has many uses, but also causes major impacts. However, little is known about key aspects of its ecology in South Africa, including its invasion history, invasion processes and dynamics, and people's perceptions of its positive and negative effects on ecosystems. Such knowledge is crucial for developing robust and defendable guidelines for sustainable management of the species. This paper provides a comprehensive dossier of the species in South Africa. It reviews what is known of its introduction and planting history, its current distribution, its value for commercial forestry and other uses, its impacts as an invasive species, pests and pathogens associated with the species, people's perceptions of the species and conflicts of interest, and the options for management and restoration. The review reveals that E. camaldulensis is a tree of many contradictions in South Africa, making it a poster-child example of a conflict-generating non-native species. Based on available knowledge, we assess options for improved management. We highlight several knowledge gaps which need to be addressed in more detail through future research. It is hoped that this species profile will serve as a model for the types of information that are needed for developing objective management strategies for non-native tree species in different parts of the world. Keywords: Conflicts of interest; Eucalyptus; impacts; introduction history; invasive species management; pests and diseases; tree invasions BACKGROUNDPeople and trees have an intimate and vital relationship (e.g. Hayman, 2003;Coder et al., 2017). It is therefore not surprising that many tree species were, and still are being, spread around the world by humans, literally following in the footprints of human civilisation (Richardson, 1998). Trees are used by people for multiple purposes (e.g. food, fuel, paper, timber, shelter, etc.) and contribute to diverse ecosystem services, including net primary production, pollination, soil formation, microclimate provisioning, nutrient cycling, and diverse cultural services (Foli et al., 2014; Castro-Diez et al., 2019). Trees provide ecosystem services worth more than $500 million per year to 10 of the world's megacities (Endreny et al., 2017. On the other hand, many alien tree species also have negative impacts by impacting on ecosystem services or creating new ecosystem disservices (Potgieter et al., 2017). The number of introduced tree species recorded as invasive aliens is increasing rapidly several decades after widespread introductions and plantings of hundreds of tree species in many parts of the world (Richardson, 1998;Richardson and Rejmánek, 2011;Richardson et al., 2014; Rouget et al., 2016).Trees are conspicuous and influential components of vegetation. Because of the...

show abstract

Are managed pollinators ultimately linked to the pollination ecosystem service paradigm?

Cited by 6 publications

References 30 publications

Reproductive Ecology of the Invasive Alien Shrub Pyracantha angustifolia in the Grassland Biome, South Africa

Reproductive Ecology of the Invasive Alien Shrub Pyracantha angustifolia in the Grassland Biome, South Africa

Chemical Profiles of Polyphenols in Aqueous Infusion of Yerba Mate and Tea Mate (Ilex Paraguariensis) From Argentina, Brazil and Uruguay

Eucalyptus camaldulensisin South Africa – past, present, future

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