scholarly journals Assembly of modern mammal community structure driven by Late Cretaceous dental evolution, rise of flowering plants, and dinosaur demise

2019 ◽  
Vol 116 (20) ◽  
pp. 9931-9940 ◽  
Author(s):  
Meng Chen ◽  
Caroline A. E. Strömberg ◽  
Gregory P. Wilson
Keyword(s):  
Community Structure ◽  
Body Size ◽  
Flowering Plants ◽  
Deep Time ◽  
Ecological Structure ◽  
Dietary Preference ◽  
Dental Evolution ◽  
The World ◽  
Primary Focus ◽  
Ecological Differences

The long-standing view that Mesozoic mammaliaforms living in dinosaur-dominated ecosystems were ecologically constrained to small size and insectivory has been challenged by astonishing fossil discoveries over the last three decades. By studying these well-preserved early mammaliaform specimens, paleontologists now agree that mammaliaforms underwent ecomorphological diversification during the Mesozoic Era. This implies that Mesozoic mammaliaform communities had ecological structure and breadth that were comparable to today’s small-bodied mammalian communities. However, this hypothesis remains untested in part because the primary focus of most studies is on individual taxa. Here, we present a study quantifying the ecological structure of Mesozoic mammaliaform communities with the aim of identifying evolutionary and ecological drivers that influenced the deep-time assembly of small-bodied mammaliaform communities. We used body size, dietary preference, and locomotor mode to establish the ecospace occupation of 98 extant, small-bodied mammalian communities from diverse biomes around the world. We calculated ecological disparity and ecological richness to measure the magnitude of ecological differences among species in a community and the number of different eco-cells occupied by species of a community, respectively. This modern dataset served as a reference for analyzing five exceptionally preserved, extinct mammaliaform communities (two Jurassic, two Cretaceous, one Eocene) from Konservat-Lagerstätten. Our results indicate that the interplay of at least three factors, namely the evolution of the tribosphenic molar, the ecological rise of angiosperms, and potential competition with other vertebrates, may have been critical in shaping the ecological structure of small-bodied mammaliaform communities through time.

scholarly journals Benefits and Limitations of Non-Transgenic Micronutrient Biofortification Approaches

Agronomy ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 464
Author(s):  
Edward Marques ◽  
Heather M. Darby ◽  
Jana Kraft
Keyword(s):  
Current Literature ◽  
The State ◽  
World Health ◽  
Micronutrient Deficiencies ◽  
Conventional Breeding ◽  
The World ◽  
Primary Focus

Increasing the amount of micronutrients in diets across the world is crucial to improving world health. Numerous methods can accomplish this such as the biofortification of food through biotechnology, conventional breeding, and agronomic approaches. Of these, biofortification methods, conventional breeding, and agronomic approaches are currently globally accepted and, therefore, should be the primary focus of research efforts. This review synthesizes the current literature regarding the state of biofortified foods through conventional breeding and agronomic approaches for crops. Additionally, the benefits and limitations for all described approaches are discussed, allowing us to identify key areas of research that are still required to increase the efficacy of these methods. The information provided here should provide a basal knowledge for global efforts that are combating micronutrient deficiencies.

scholarly journals Meta-analysis reveals severe pollen limitation for the flowering plants growing in East Himalaya-Hengduan Mountains region

BMC Ecology ◽  
2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Xianfeng Jiang ◽  
Yanping Xie
Keyword(s):  
Confidence Interval ◽  
Pollen Limitation ◽  
Meta Analysis ◽  
Flowering Plants ◽  
Biodiversity Hotspot ◽  
Clear Relationship ◽  
Hengduan Mountains ◽  
Independent Data ◽  
The World ◽  
Global Biodiversity

Abstract Background Pollen limitation occurs widely and has an important effect on flowering plants. The East Himalaya-Hengduan Mountains region is a global biodiversity hotspot. However, to our knowledge, no study has synthetically assessed the degree of pollen limitation in this area. The present study aims to reveal the degree of pollen limitation for the flowering plants growing on East Himalaya-Hengduan Mountains and to test whether the reproductive features or the elevation is closely correlated with the degree of pollen limitation in this area. Results We complied data from 76 studies, which included 96 species and 108 independent data records. We found that the flowering plants in this area undergo severe pollen limitation [overall Hedges’ d = 2.004, with a 95% confidence interval (1.3264, 2.6743)] that is much higher than that of the flowering plants growing in many other regions around the world. The degree of pollen limitation was tested to determine the correlation with the capacity for autonomous self-reproduction and with the pollination pattern (generalized vs. specialized pollination) of plants. In addition, we found a clear relationship between elevation and the degree of pollen limitation, which indicates that plants might undergo more severe pollen limitation in relatively high places. Conclusions This paper is the first to address the severe pollen limitation of the flowering plants growing in East Himalaya-Hengduan Mountains region. Moreover, we reveal the positive correlation between elevation and the degree of pollen limitation.

The Beginnings

2017 ◽  
Author(s):  
Raymond Pierotti ◽  
Brandy R. Fogg
Keyword(s):  
Body Size ◽  
Gene Pool ◽  
Southern Asia ◽  
Early Stages ◽  
The World ◽  
State Of Affairs ◽  
The Relationship

This introductory chapter provides an overview of the relationship between humans and wolves. The relationship began as coevolutionary, with the species cooperating at times but also capable of functioning independently. This state of affairs dominated early stages of the relationship between the two species and may have persisted for 20,000 years or longer. In other parts of the world, for example, southern Asia, humans began to shape wolves into clearly domestic forms: animals phenotypically distinct from wolves, especially in body size. This latter process involves various aspects of the wolf gene pool being essentially divided, with many individuals staying true wolves while others changed in form, becoming what people now describe as “dogs” without losing their genetic links to their wolf ancestry or their ability to interbreed with wolves.

scholarly journals Exhibiting an Unapologetic Fascist: Mario Sironi

Perceptions ◽  
2018 ◽  
Vol 4 (2) ◽  
pp. 20
Author(s):  
Fiona Fackler
Keyword(s):  
Public Perceptions ◽  
The Political ◽  
Contemporary Culture ◽  
National History ◽  
Work Of Art ◽  
The Public ◽  
Public Displays ◽  
Contemporary Politics ◽  
The World ◽  
Primary Focus

Benito Mussolini's Fascist dictatorship over Italy in the period between world wars remains a troubling element of the nation's history. It has heavily affected the contemporary politics and public displays of in addition to scholarship about the thriving artistic scene of that time, yet, the weight of Italy's Fascist legacy has either comprised the primary focus of or been entirely absent from studies on art in the 1920s-1930s until a recent academic interest in reinvestigating the political and cultural atmosphere of the period. This paper underlines the importance of such renewed critical interests in chapters of painful history and how those interests can influence public perceptions of national history and its outreach into contemporary culture. Specifically, I will examine the written and exhibited discrepancies between the life of the painter Mario Sironi under the regime and the life of selected paintings that perpetuate his existence in contemporary Italy. By comparing La Famiglia del Pastore in "Roma Anni Trenta: La Galleria d'Arte Moderna e Le Quadriennali (1931 - 1935 - 1939)" at the Galleria d'Arte Moderna and La Solitudine in "Time is Out of Joint" at the Galleria Nazionale I will analyze how exhibitions of art shape the Italian public's reception of this period. I contend that certain exhibiting styles can either deepen public reception and consideration for a work of art and the time from which it stems or can reduce understanding to that inspired by instantaneous connections, dependent on the institution's or curator's approach to context. For, no trip to a museum is simply a trip to a museum – whether actively or passively, museums shape how the public approaches the works in its halls and through these works, how the public approaches themselves and the world surrounding them.

scholarly journals Masters of Wine on Twitter: presence, activity, impact and community structure

2021 ◽  
Vol 10 (1) ◽  
pp. 73-88
Author(s):  
Enrique Orduña-Malea ◽  
Cristina I. Font-Julian ◽  
José Antonio Ontalba-Ruipérez ◽  
Raúl Compés-López
Keyword(s):  
Social Media ◽  
International Trade ◽  
Community Structure ◽  
Descriptive Statistics ◽  
Wine Industry ◽  
The Internet ◽  
The World ◽  
Credible Information ◽  
Do So ◽  
The Way

Globalisation, the Internet and social media have changed the kind of actors with influence in the wine industry and the way these actors create signals to communicate credible information about experience and trust attributes. Among the most prestigious experts in the world of wine are the Masters of Wine (MW). Although initially devoted to international trade, they have spread their activities and their opinion is more and more appreciated by producers and consumers. The main objective of this article is to determine this community of experts’ behaviour on Twitter. In order to do so, four factors (presence, activity, impact and community) have been considered. All Twitter profiles belonging to users awarded with the MW qualification were identified and analysed. In addition, a set of 35,653 tweets published by the MWs were retrieved and analysed through descriptive statistics. The results show MWs on Twitter as high attractors (number of followers), moderate publishers (original contents published), moderate influencers (number of likes and retweets), and low interactors (number of friends and mentions to other users). These findings reveal that the MW community is not using Twitter to gain or reinforce their reputation as an accredited expert in the wine industry, giving more influential space on Twitter to consumers and amateurs.

scholarly journals The World Flora Online 2020 project: will Cameroon come up to the expectation?

Rodriguésia ◽  
2015 ◽  
Vol 66 (4) ◽  
pp. 961-972 ◽  
Author(s):  
Jean Michel Onana
Keyword(s):  
Plant Species ◽  
Flowering Plants ◽  
West African ◽  
Tropical Africa ◽  
African Countries ◽  
Red Data Book ◽  
The World ◽  
Data Book ◽  
Plant Families ◽  
High Level

Abstract Biodiverse Cameroon has been highlighted as the top country in tropical Africa for plant species diversity per degree square, with a higher diversity than all other West African countries added together, and including two of the top documented centres of plant diversity in Tropical Africa. Despite its reduced taxonomic capacity, with only six active taxonomists a high level of botanical activity in the country has resulted in accomplishments such as the databasing of the YA Herbarium (over 60,000 records), which has an in-country collection coverage of almost 95% of the known plant species that are recorded for Cameroon. Other accomplishments are the Red Data Book of the Flowering Plants of Cameroon, several local checklists and published volumes of the Flore du Cameroun which covers 37% of the country's species. Currently the checklist of Cameroon records 7,850 taxa at species and infraspecific level. Resources are needed to support and heighten the profile of this small botanical community. Already thanks to strong collaboration between Cameroon and renowned botanical institutes of others countries, in particular France and United Kingdom, one hundred and thirteen plant families have been published and would help this country to complete the recording of its biodiversity towards contributing to the World Flora Online 2020 project.

scholarly journals Тематическое исследование всемирного наследия Центральной Азии Primary tabs

2021 ◽  
Author(s):  
Hervé Lethier
Keyword(s):  
Central Asia ◽  
Regional Scale ◽  
World Heritage ◽  
Initial Assessment ◽  
World Heritage List ◽  
Wide Range ◽  
The World ◽  
Level Of Knowledge ◽  
Primary Focus ◽  
Terrestrial Biodiversity

The World Heritage thematic study for Central Asia has been produced as a contribution to supporting the implementation of the World Heritage Convention in Central Asia. It provides a response to a Decision of the World Heritage Committee in order to identify outstanding areas with potential for future nomination to the World Heritage List with primary focus on criteria (ix) and (x) at the regional scale. The approach applied in this study, focusing on criteria (ix) and (x), follows that from the 2013 study on terrestrial biodiversity and the World Heritage List. Criteria (ix) and (x) are clearly the primary ones for recognition of extant biodiversity values, and they have been applied to a wide range of biodiversity features, including ecosystems, species, and ecological and/or biological processes. Although this study is an initial assessment, most areas and sites recommended here have appeared repeatedly as being of particular interest for biodiversity conservation during the work process, whether through literature analysis or in discussions with experts and specialists. The recommendations reflect the current level of knowledge that should be strengthened in the future, to ensure that the identified areas and sites are well supported with the necessary data and empirical evidence to address the requirements of the Operational Guidelines.

Latitudinal body-mass trends in Oligo-Miocene mammals

Paleobiology ◽  
2016 ◽  
Vol 42 (4) ◽  
pp. 643-658
Author(s):  
John D. Orcutt ◽  
Samantha S. B. Hopkins
Keyword(s):  
Body Size ◽  
Body Mass ◽  
Regional Scale ◽  
Latitudinal Gradients ◽  
Bergmann’S Rule ◽  
Strongly Correlated ◽  
Bergmann's Rule ◽  
Deep Time ◽  
Causal Factors ◽  
Primary Driver

AbstractPaleecological data allow not only the study of trends along deep-time chronological transects but can also be used to reconstruct ecological gradients through time, which can help identify causal factors that may be strongly correlated in modern ecosystems. We have applied such an analysis to Bergmann’s rule, which posits a causal relationship between temperature and body size in mammals. Bergmann’s rule predicts that latitudinal gradients should exist during any interval of time, with larger taxa toward the poles and smaller taxa toward the equator. It also predicts that the strength of these gradients should vary with time, becoming weaker during warmer periods and stronger during colder conditions. We tested these predictions by reconstructing body-mass trends within canid and equid genera at different intervals of the Oligo-Miocene along the West Coast of North America. To allow for comparisons with modern taxa, body mass was reconstructed along the same transect for modernCanisandOdocoileus. Of the 17 fossil genera analyzed, only two showed the expected positive relationship with latitude, nor was there consistent evidence for a relationship between paleotemperature and body mass. Likewise, the strength of body-size gradients does not change predictably with climate through time. The evidence for clear gradients is ambiguous even in the modern genera analyzed. These results suggest that, counter to Bergmann’s rule, temperature alone is not a primary driver of body size and underscore the importance of regional-scale paleoecological analyses in identifying such drivers.

Higher Education, Social Welfare, and Corruption

2019 ◽  
pp. 54-78
Author(s):  
Marlene M. Mendoza-Macías
Keyword(s):  
Higher Education ◽  
Human Development ◽  
Wealth Distribution ◽  
Sustainable Human Development ◽  
The Social ◽  
The World ◽  
Primary Focus ◽  
The University ◽  
Social Management

The world is facing multiple changes and challenges; the environment shows inequalities, poverty, and corruption. Ecuador is not the exception. The man is declared the primary focus of the Ecuadorian Constitution to meet such changes. The objective of decreasing poverty, improving wealth distribution, and contributing to sustainable human development is unavoidable. In that context, the university has the pivotal role in generating interaction with society and its reality, to train professionals social and humanly responsible towards such facts, to promote the social management of knowledge from different action fields. The goal of this chapter is to specify the role of higher education institutions (HEIs) in a society where they take part, to draw up social responsibility of universities in Guayaquil and the challenges they face, as well as actions that contribute to the eradication of corruption and greater wellbeing of the society.

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