Management of Bombus Atratus Bumblebees to Pollinate Lulo (Solanum Quitoense L), a Native Fruit from the Andes of Colombia PDF Download

Author: Maria Teresa Almanza Fandiño
Publisher: Cuvillier Verlag
ISBN: 3867271879
Category :
Languages : en
Pages : 131

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Book Description
Solanum quitoense (Lulo) from the northern Andes is a fruit with an attractive taste. It has a high export potential but its production is hampered by insufficient pollination. Studies on the reproductive system of Lulo revealed that, due to their poricidal anthers, the flowers need pollinators for self- and cross-pollination. Pollination by native bumblebees significantly increases fruit set and quality. Experiments show that colonies of Bombus atratus can be reared in captivity and used in Lulo fields for providing increased pollination services. Modeling based on data on colony development reveal larva/workers ratio and the supply of pollen as main parameters for improving the rearing method.

Author: Shah Fahad
Publisher: CRC Press
ISBN: 1000380963
Category : Science
Languages : en
Pages : 273

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Developing Climate-Resilient Crops: Improving Global Food Security and Safety is timely, as the world is gradually waking up to the fact that a global food crisis of enormous proportions is brewing. Climate change is creating immense problems for agricultural productivity worldwide, resulting in higher food prices. This book elucidates the causative aspects of climate modification related to agriculture, soil, and plants, and discusses the relevant resulting mitigation process and also how new tools and resources can be used to develop climate-resilient crops. Features: Addresses the limits of the anthropogenic global warming theory advocated by the Intergovernmental Panel on Climate Change Presents the main characters (drought tolerance, heat tolerance, water-use efficiency, disease resistance, nitrogen-use efficiency, nitrogen fixation, and carbon sequestration) necessary for climate-resilient agriculture Delivers both theoretical and practical aspects, and serves as baseline information for future research Provides valuable resource for those students engaged in the field of environmental sciences, soil sciences, agricultural microbiology, plant pathology, and agronomy Highlights factors that are threatening future food production

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 40

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Author: Julián Felipe Peña Polanía
Publisher:
ISBN:
Category :
Languages : en
Pages :

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In recent years, habitat loss and climate change have been one of the main causes of the decline of pollinator insects of high importance. However, one of the most affected groups has been the bumblebees of the genus Bombus. In Colombia, the dynamics and processes of dispersion of these species in landscapes affected by humans remain unknown. Since the change in habitat can increase intrinsic threats to populations, including genetic drift and inbreeding, the use of molecular tools in conjunction with population genetics is essential to understand the most basic levels of biological diversity, and identify the genetic status of populations affected by changes in the landscape. We examine the patterns of genetic diversity and how environmental factors can shape it through the use of NextRAD, in a population of bumblebees of the species Bombus atratus, which has a range of distribution that overlaps highly agricultural ecosystems. Our results reveal a low genetic differentiation among sample localities, suggesting a low effect of land use on genetic flow. However, we found a negative correlation between genetic diversity and land use, this indicated that environmental variables at the local level are what are shaping genetic variations. We identified several loci under selection, a subset of which was associated with land use, taken as the percentage of surface surrounding each sampling site. Our findings shed important light on the life history of B. atratus and highlight the role of land use as a phenomenon of change regarding the genetic diversity of these bumblebees. Likewise, our research reveals for the first time patterns of local adaptation in this species in Colombia.

Author: Die deutsche Nationalbibliothek
Publisher:
ISBN:
Category :
Languages : de
Pages : 938

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Author: Lynn V. Dicks
Publisher: Pelagic Publishing
ISBN: 1907807020
Category : Nature
Languages : en
Pages : 147

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This book brings together scientific evidence and experience relevant to the practical conservation of wild bees. The authors worked with an international group of bee experts and conservationists to develop a global list of interventions that could benefit wild bees. They range from protecting natural habitat to controlling disease in commercial bumblebee colonies. For each intervention, the book summarises studies captured by the Conservation Evidence project, where that intervention has been tested and its effects on bees quantified. The result is a thorough guide to what is known, or not known, about the effectiveness of bee conservation actions throughout the world. Bee Conservation is the first in a series of synopses that will cover different species groups and habitats, gradually building into a comprehensive summary of evidence on the effects of conservation interventions for all biodiversity throughout the world. By making evidence accessible in this way, we hope to enable a change in the practice of conservation, so it can become more evidence-based. We also aim to highlight where there are gaps in knowledge. Evidence from all around the world is included. If there appears to be a bias towards evidence from northern European or North American temperate environments, this reflects a current bias in the published research that is available to us. Conservation interventions are grouped primarily according to the relevant direct threats, as defined in the International Union for the Conservation of Nature (IUCN)’s Unified Classification of Direct Threats.

Author: William G. D'Arcy
Publisher: Columbia University Press
ISBN: 9780231057806
Category : Nature
Languages : en
Pages : 636

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This book explores the puzzling phenomenon of new veiling practices among lower middle class women in Cairo, Egypt. Although these women are part of a modernizing middle class, they also voluntarily adopt a traditional symbol of female subordination. How can this paradox be explained? An explanation emerges which reconceptualizes what appears to be reactionary behavior as a new style of political struggle--as accommodating protest. These women, most of them clerical workers in the large government bureaucracy, are ambivalent about working outside the home, considering it a change which brings new burdens as well as some important benefits. At the same time they realize that leaving home and family is creating an intolerable situation of the erosion of their social status and the loss of their traditional identity. The new veiling expresses women's protest against this. MacLeod argues that the symbolism of the new veiling emerges from this tense subcultural dilemma, involving elements of both resistance and acquiescence.

Author: William C. Campbell
Publisher: Springer Science & Business Media
ISBN: 1461236266
Category : Medical
Languages : en
Pages : 380

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Book Description
Ivermectin and abamectin, members of the avermectin family of compounds, were introduced to the market in the 1980's as a veterinary antiparasitic drug and agricultural pesticide, respectively. Their acceptance and commercial success have been remarkable; both are highly effective and in worldwide use. The efficacy of ivermectin in river blindness has expanded the interest in its use in human medicine. In response to the intense scientific and industrial interest in ivermectin and abamectin and the likelihood that they will be forerunners of an expanding family of drugs, this comprehensive monograph satisfies the need for a review and synthesis of current knowledge about the use of these substances in crop protection as well as in cattle, sheep, swine, horses, dogs, cats, birds, fish, reptiles, and in man. This overview presents chemical, biochemical, and microbiological data, as well as pharmacological, safety, and environmental aspects and covers practical use of the compounds as antiparasitic and pesticide agents, as well as the available safety data that have emerged from the clinical experience with human applications.

Author: José Javier G. Quezada-Euán
Publisher: Springer
ISBN: 3319777858
Category : Science
Languages : en
Pages : 294

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Book Description
The stingless bees are the most diverse group of highly social bees and are key species in our planet’s tropical and subtropical regions, where they thrive. In Mexico, the management of stingless bees dates back centuries, and they were an essential part of the culture and cosmogony of native peoples like the Maya. In recent decades a vast amount of information has been gathered on stingless bees worldwide. This book summarizes various aspects of the biology and management of stingless bees, with special emphasis on the Mexican species and the traditions behind their cultivation. Much of the information presented here was produced by the author and the team of researchers at the Universidad Autónoma de Yucatán in the course of three decades of working with these insects. Given the breadth of its coverage, the book offers an equally valuable reference guide for academics, students and beekeepers alike.

Author: Fernando Ramirez
Publisher: Springer
ISBN: 3319142003
Category : Nature
Languages : en
Pages : 47

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Book Description
​Global climate change is expected to produce increased carbon dioxide levels in the atmosphere, higher temperatures, aberrant precipitation patterns and a host of other climatic changes that would affect all life on this planet. This review article addresses the impact of climate change on fruit trees and the response of the trees to a changing environment. The response of fruit trees to increasing carbon dioxide levels, phenological changes occurring in the trees themselves due to increased temperature and the lower chilling hours especially in the temperate regions, ecophysiological adaptations of the trees to the changing climate, impact of aberrant precipitation, etc. are reviewed. There is very little data on the impact of rising CO2 levels on fruit tree performance or productivity including the temperate region. Based on a large number of observations on the phenology, there is reason to believe that the flowering and fruiting of most species have advanced by quite a few days, but with variations in different crops and on different continents. The chilling hours have also grown shorter in many regions, causing considerable reductions in yield for several species. In the tropics, there is very little work on fruit trees; however, the available data show that precipitation is a major factor regulating their phenology and yield. The ecophysiological adaptations vary from species to species, and there is a need to develop phenological models in order to estimate the impact of climate change on plant development in different regions of the world. More research is also called for to develop adaptation strategies to circumvent the negative impacts of climate change.