scholarly journals Cretaceous fire-resistant angiosperms

2021 ◽  
Author(s):  
Shuo Wang ◽  
Chao Shi ◽  
Hao-hong Cai ◽  
Hong-rui Zhang ◽  
Xiao-xuan Long ◽  
...  
Keyword(s):  
South African ◽  
Fire Resistance ◽  
Sister Group ◽  
Living Fossil ◽  
Morphological Stasis ◽  
Core Eudicots ◽  
Fossil Flowers ◽  
Floral Characters ◽  
African Genus

Abstract Background: Flowering plants (angiosperms) dominate most global ecosystems today, but their rapid Cretaceous diversification has remained poorly understood ever since Darwin referred to it as an ‘abominable mystery’. Although numerous Cretaceous fossil flowers have been discovered in recent years, most are represented by incomplete charcoalified fragments that do not preserve delicate structures such as complete petals and surface textures, which means that their similarity to living forms is often difficult to discern. The scarcity of information about the ecology of early angiosperms makes it difficult to test hypotheses about the drivers of their diversification. Among other factors, frequent fires in the Cretaceous have been postulated as having possibly facilitated the rise of angiosperms. However, to date no early fossil angiosperms displaying fire-adapted traits have been known, making the role of fire in shaping Cretaceous floras uncertain.Results: We report the discovery of two exquisitely preserved fossil flower species, one identical to the inflorescences of the extant crown eudicot genus Phylica and the other recovered as a sister group to Phylica, both preserved as inclusions in Cretaceous amber from northern Myanmar (~99 Ma). These specialized flower structures, named Phylica piloburmensis sp. nov. and Eophylica priscastellata gen. et sp. nov., were adapted to surviving frequent wildfires, providing the earliest evidence of fire-resistance in angiosperms. The fossils suggest that fire was a significant selective force in Cretaceous angiosperm floras and that adaptations to fire resistance in some eudicot clades have been conserved for at least 99 Ma. This morphological stasis encompasses a range of floral characters, including the production of ‘pseudo-flowers’, and characteristic fruit and pollen architecture. Given its morphological distinctiveness, the Eophylica-Phylica clade represents one of the first well-documented angiosperm ‘living fossil’ genera from the Cretaceous. Conclusion: Our study suggests that core eudicots with specialised flower morphology displaying hallmarks of fire resistance and identical to those of the extant south African genus Phylica, had originated by the mid-Cretaceous (~99 Ma). Palaeoenvironmental reconstructions indicate that these plants lived in conditions similar to those of present-day southern Africa where 70% of taxa survive frequent burning, and that fire resistance was probably widespread in the fire-prone Cretaceous. The results also provide new insights into the biogeographic origin of at least one element of the highly endemic Greater Cape Region biodiversity hotspot flora biota.

Assessment of lateral compression of the idiosoma in adult water mites as a taxonomic character and reclassification of Frontipodopsis Walter, Wettina Piersig and some other basal Hygrobatoidea (Acari : Hydrachnida)

2000 ◽  
Vol 14 (4) ◽  
pp. 433 ◽  
Author(s):  
David R. Cook ◽  
Ian M. Smith ◽  
Mark S. Harvey
Keyword(s):  
South African ◽  
Sister Group ◽  
Western Hemisphere ◽  
Water Mites ◽  
Lateral Compression ◽  
The South ◽  
The Family ◽  
Apparent Relationship ◽  
African Genus ◽  
Family Classification

Systematists have frequently interpreted lateral compression of the idiosoma in post-larval instars of water mites as a synapomorphy indicating common ancestry. This paper re-examines the evidence to support this assumption and concludes that lateral flattening has occurred independently several times during water mite evolution, and especially often in various basal clades of the superfamily Hygrobatoidea. Reassessment of the phylogenetic relationships of the genera attributed to these clades results in improved understanding of the early evolution and biogeography of hygrobatoid water mites and necessitates redefinition of several clades and significant revision of the family classification. The South African genus Karlvietsia K.O. Viets, 1962 is transferred from the subfamily Frontipodopsinae of the family Aturidae to the Hygrobatidae. The Australian genera Tasmanaxona Cook, 1986, Wheenyella Cook, 1986 and Wheenyoides Harvey, 1990 are also removed from Frontipodopsinae and placed with the genus Wettina Piersig, 1892, here removed from the family Pionidae, in the family Wettinidae Cook, stat. nov. Based on apparent relationship with members of Wettinidae, the South African genus Stormaxonella K.O. Viets, 1962 is transferred from the Aturidae and provisionally placed in the Wettinidae. The clade including the predominately Holarctic genus Lethaxona K.H. Viets, 1932 and the Western Hemisphere genus LethaxonellaCook, 1963 is recognised as the probable sister group of Wettinidae, and these genera are consequently removed from the Aturidae and placed in Lethaxonidae, fam. nov. The genus Frontipodopsis Walter is reassigned from Aturidae to the now monobasic family Frontipodopsidae K.H. Viets, stat. nov. Finally, five new species are described, including Frontipodopsis (Frontipodopsella) sudafricanus, sp. nov., Wettina occidentalis, sp. nov., Karlvietsia simplex, sp. nov., Hygrobates (Hygrobates) gereckei, sp. nov. and Hygrobates (Hygrobatides)frontipodoides, sp. nov., and both Karlvietsia brevipalpis K.O. Viets and K. angustipalpis K.O. Viets are redescribed.

Learning Zulu

2016 ◽  
Author(s):  
Mark Sanders
Keyword(s):  
Language Learning ◽  
Cultural History ◽  
South African ◽  
Press Coverage ◽  
African History ◽  
African Culture ◽  
The Past ◽  
Correct Form ◽  
Linguistic Purism

When this book's author began studying Zulu, he was often questioned why he was learning it. This book places the author's endeavors within a wider context to uncover how, in the past 150 years of South African history, Zulu became a battleground for issues of property, possession, and deprivation. The book combines elements of analysis and memoir to explore a complex cultural history. Perceiving that colonial learners of Zulu saw themselves as repairing harm done to Africans by Europeans, the book reveals deeper motives at work in the development of Zulu-language learning—from the emergence of the pidgin Fanagalo among missionaries and traders in the nineteenth century to widespread efforts, in the twentieth and twenty-first centuries, to teach a correct form of Zulu. The book looks at the white appropriation of Zulu language, music, and dance in South African culture, and at the association of Zulu with a martial masculinity. In exploring how Zulu has come to represent what is most properly and powerfully African, the book examines differences in English- and Zulu-language press coverage of an important trial, as well as the role of linguistic purism in xenophobic violence in South Africa. Through one person's efforts to learn the Zulu language, the book explores how a language's history and politics influence all individuals in a multilingual society.

ROLE OF LIBRARIANS IN TEACHING INFORMATION LITERACY IN ZIMBABWEAN AND SOUTH AFRICAN UNIVERSITIES: A COMPARATIVE STUDY

Mousaion ◽  
2016 ◽  
Vol 33 (1) ◽  
pp. 23-42 ◽  
Author(s):  
Tinashe Mugwisi
Keyword(s):  
South Africa ◽  
South African ◽  
Information Literacy ◽  
Ethical Issues ◽  
University Libraries ◽  
Information And Communications Technologies ◽  
Communications Technologies ◽  
Information Skills ◽  
The University

Information and communications technologies (ICTs) and the Internet have to a large extent influenced the way information is made available, published and accessed. More information is being produced too frequently and information users now require certain skills to sift through this multitude in order to identify what is appropriate for their purposes. Computer and information skills have become a necessity for all academic programmes. As libraries subscribe to databases and other peer-reviewed content (print and electronic), it is important that users are also made aware of such sources and their importance. The purpose of this study was to examine the teaching of information literacy (IL) in universities in Zimbabwe and South Africa, and the role played by librarians in creating information literate graduates. This was done by examining whether such IL programmes were prioritised, their content and how frequently they were reviewed. An electronic questionnaire was distributed to 12 university libraries in Zimbabwe and 21 in South Africa. A total of 25 questionnaires were returned. The findings revealed that IL was being taught in universities library and non-library staff, was compulsory and contributed to the term mark in some institutions. The study also revealed that 44 per cent of the total respondents indicated that the libraries were collaborating with departments and faculty in implementing IL programmes in universities. The study recommends that IL should be an integral part of the university programmes in order to promote the use of databases and to guide students on ethical issues of information use.

Problematic Political Consumerism

2018 ◽  
pp. 698-720
Author(s):  
Michele Micheletti ◽  
Didem Oral
Keyword(s):  
South African ◽  
Moral Dilemmas ◽  
Ideal Type ◽  
Type Model ◽  
Political Consumerism ◽  
Research Challenges ◽  
Moral Claims

Typically, political consumerism is portrayed in straightforward, unproblematic ways. This chapter discusses how and why political consumerism—and particularly boycotts—can be confusing and problematic. Theoretically it focuses on moral dilemmas within political consumerism and the key role of overriding moral claims in the motivations for and actions of political consumer causes. An ideal type model, constructed for analyzing unproblematic and problematic political consumerism, is applied to cases of more unproblematic political consumerism (e.g., the Nestlé, Nike, and South African boycotts) and more problematic political consumerism (e.g., the Disney boycott and the movement against Israeli settlements in the occupied Palestine territories). The chapter also addresses why other forms of political consumerism (buycotts and discursive actions) seem less vulnerable to moral dilemmas as well as the research challenges in studying more problematic cases of political consumerism.

scholarly journals Truth and reconciliation in South Africa: Hindu experiences and concerns

2004 ◽  
Vol 60 (4) ◽  
Author(s):  
P.G.J. Meiring
Keyword(s):  
South Africa ◽  
South African ◽  
Truth And Reconciliation Commission ◽  
Faith Communities ◽  
The South ◽  
Reconciliation Commission ◽  
Truth And Reconciliation ◽  
Hindu Community ◽  
The Way

The author who served on the South African Truth and Reconciliation Commission (TRC), focuses on the Hindu experience in South Africa during the apartheid years. At a special TRC Hearing for Faith Communities (East London, 17-19 November 1997) two submissions by local Hindu leaders were tabled. Taking his cues from those submissions, the author discusses four issues: the way the Hindu community suffered during these years, the way in which some members of the Hindu community supported the system of apartheid, the role of Hindus in the struggle against apartheid, and finally the contribution of the Hindu community towards reconciliation in South Africa. In conclusion some notes on how Hindus and Christians may work together in th

scholarly journals A cause to unravel the role of criminologists in compiling pre-sentence report: A South African perspective

2019 ◽  
Vol 5 (1) ◽  
pp. 1704601
Author(s):  
Bongolethu Diko ◽  
Sogo Angel Olofinbiyi ◽  
Jean Steyn
Keyword(s):  
South African ◽  
African Perspective

Ethnicity and Voting Patterns in South Africa

1979 ◽  
Vol 27 (3) ◽  
pp. 458-468 ◽  
Author(s):  
Henry Lever
Keyword(s):  
South Africa ◽  
South African ◽  
Categorical Data ◽  
Economic Status ◽  
Party Choice ◽  
Political Choices ◽  
Electoral Behaviour ◽  
Log Linear ◽  
Published Research

There is some controversy concerning the role of ethnicity in South African electoral behaviour. Since the society is segmented on ethnic lines it is to be expected that ethnicity would play a crucial role in affecting political choices. Some writers have gone so far as to suggest that ethnicity is the only significant factor affecting voting preferences. The controversy arose at a time when Goodman's method of log-linear analysis for hierarchical models had not yet been developed. This method provides the most powerful tool available for the multivariate analysis of categorical data. A re-analysis of previously published research using Goodman's method shows that ethnicity is not the only significant factor having a bearing on voting preferences. The first four-way table of voting preferences in South Africa is presented. The order of importance of the variables affecting party choice is: (1) ethnicity (2) socio-economic status (3) age of the voter. The recursive model suggested by the analysis explains approximately 98 per cent of the data.

‘Our passion for legality’: international law and imperialism in late nineteenth-century Britain

2008 ◽  
Vol 34 (3) ◽  
pp. 403-423 ◽  
Author(s):  
CASPER SYLVEST
Keyword(s):  
Nineteenth Century ◽  
International Law ◽  
South African ◽  
Historical Analysis ◽  
World Politics ◽  
Late Nineteenth Century ◽  
Contemporary World ◽  
Late Nineteenth ◽  
Congo Free State

AbstractThis article deploys a historical analysis of the relationship between law and imperialism to highlight questions about the character and role of international law in global politics. The involvement of two British international lawyers in practices of imperialism in Africa during the late nineteenth century is critically examined: the role of Travers Twiss (1809–1897) in the creation of the Congo Free State and John Westlake’s (1828–1913) support for the South African War. The analysis demonstrates the inescapably political character of international law and the dangers that follow from fusing a particular form of liberal moralism with notions of legal hierarchy. The historical cases raise ethico-political questions, the importance of which is only heightened by the character of contemporary world politics and the attention accorded to international law in recent years.

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