scholarly journals Extinction and dawn of the modern world in the Carnian (Late Triassic)

2020 ◽  
Vol 6 (38) ◽  
pp. eaba0099 ◽  
Author(s):  
Jacopo Dal Corso ◽  
Massimo Bernardi ◽  
Yadong Sun ◽  
Haijun Song ◽  
Leyla J. Seyfullah ◽  
...  

The Carnian Pluvial Episode (Late Triassic) was a time of global environmental changes and possibly substantial coeval volcanism. The extent of the biological turnover in marine and terrestrial ecosystems is not well understood. Here, we present a meta-analysis of fossil data that suggests a substantial reduction in generic and species richness and the disappearance of 33% of marine genera. This crisis triggered major radiations. In the sea, the rise of the first scleractinian reefs and rock-forming calcareous nannofossils points to substantial changes in ocean chemistry. On land, there were major diversifications and originations of conifers, insects, dinosaurs, crocodiles, lizards, turtles, and mammals. Although there is uncertainty on the precise age of some of the recorded biological changes, these observations indicate that the Carnian Pluvial Episode was linked to a major extinction event and might have been the trigger of the spectacular radiation of many key groups that dominate modern ecosystems.

2015 ◽  
Vol 424 ◽  
pp. 140-147 ◽  
Author(s):  
Haijun Song ◽  
Paul B. Wignall ◽  
Jinnan Tong ◽  
Huyue Song ◽  
Jing Chen ◽  
...  

2011 ◽  
Vol 21 (6) ◽  
pp. 1887-1894 ◽  
Author(s):  
Jeffrey S. Dukes ◽  
Nona R. Chiariello ◽  
Scott R. Loarie ◽  
Christopher B. Field

Author(s):  
Claude-Hélène Mayer

Wildlife crime has huge consequences regarding global environmental changes to animals, plants and the entire ecosystem. Combatting wildlife crime effectively requires a deep understanding of human–wildlife interactions and an analysis of the influencing factors. Conservation and green criminology are important in reducing wildlife crime, protecting wildlife and the ecosystem and informing policy-makers about best practices and strategies. However, the past years have shown that wildlife crime is not easy to combat and it is argued in this article that there are underlying existential “givens” and culture-specific aspects that need to be investigated to understand why wildlife crime is still on the rise. This theoretical article explores (eco-)existential perspectives, Greening’s four givens and selected African philosophical concepts, aiming to understand the complexities behind the prevalence of wildlife crime within global and African contexts.


2021 ◽  
Vol 22 (1) ◽  
pp. 117-122
Author(s):  
João Vitor Gobis Verges ◽  
Nivea Massaretto Verges

ResumoAs Alterações Ambientais Globais têm se colocado como pauta de inúmeras políticas e condicionantes culturais, econômicas e sociais em diferentes países no Mundo, sendo refletidas nas perspectivas educacionais. Dessa forma, procura-se, com este trabalho, apontar um cenário de concepção e de prática sobre as alterações ambientais globais no escopo do ensino de Geografia na educação profissional e tecnológica. Nesse sentido, o objetivo da pesquisa se assentou em desvelar os seguintes aspectos: 1) mecanismos metodológicos para as aulas desenvolvidas; 2) eixos analíticos sobre as Alterações Ambientais Globais; 3) instrumentos utilizados; 4) referenciais teóricos; 6) papel do livro didático; 7) enfoques formativos dos docentes. Para isto, foi aplicado um questionário a docentes de uma instituição da rede federal de educação profissional e tecnológica no Brasil, denominada Instituto Federal de Educação, Ciência e Tecnologia. O questionário foi empregado para 11 docentes, apresentando interrogações sobre os itens acima enumerados. Obteve-se como resultado que há o predomínio de aulas expositivas e seminários, as análises sobre o tema ocorrem, majoritariamente, pelas mudanças climáticas e desmatamento, as aulas se baseiam em maior parte nos documentários e gráficos, há a prevalência de referenciais teóricos brasileiros, ocorre a constatação ampla de que os livros didáticos são deficitários e mais de 35% dos professores consideram que suas formações não possuem enfoque para o trabalho com as Alterações Ambientais Globais. Palavras-chave: Prática Docente. Meio Ambiente. Didática. AbstractGlobal Environmental Changes have been placed on the agenda of numerous policies, cultural, economic and social conditions in different countries in the world, being reflected in educational perspectives. Thus, this work seeks to point out a scenario of conception and practice on global environmental changes in the scope of teaching Geography in professional and technological education. In this sense, the objective of the research was based on unveiling the following aspects: 1) methodological mechanisms for the developed classes; 2) analytical axes on Global Environmental Changes; 3) instruments used; 4) theoretical references; 6) the textbook role; 7) teachers training approaches. For this, a questionnaire was applied to teachers of an institution of the federal network of professional and technological education in Brazil, called Federal Institute of Education, Science and Technology. The questionnaire was answered by 11 teachers, asking questions about the items listed above. It was obtained as a result that there is a predominance of expository classes and seminars, the analyzes on the subject are mainly due to climate change and deforestation, the classes are mostly based on documentaries and graphics, there is a prevalence of Brazilian theoretical references, it occurs the widespread finding that textbooks are deficient and more than 35% of teachers consider that their training does not have a focus on working with Global Environmental Changes. Keywords: Teacher Practice. Environment. Didactic.


Check List ◽  
2012 ◽  
Vol 8 (5) ◽  
pp. 940 ◽  
Author(s):  
Douglas Fernandes Rodrigues Alves ◽  
Samara De Paiva Barros-Alves ◽  
Valter José Cobo ◽  
Daniel José Marcondes Lima ◽  
Adilson Fransozo

Biodiversity can be useful as an ecosystem indicator for conservation and monitoring, through continuous assessment of its main properties including stability, primary productivity, exploitation tolerance and even global environmental changes. The main purpose of this study was to provide a checklist of the crabs associated with subtidal rocky bottoms at the Vitoria Archipelago, southeastern Brazilian coast. Monthly collections were carried out from February 2004 through January 2006 on three islands at the Vitória Archipelago (23°44’S-45°01’W). The crabs were hand-caught by SCUBA divers during the daytime, in rock subtidal. A total of 3084 individuals were caught, belonging to 42 species, 28 genera, and 12 families, highlighting Mithraculus forceps (1528) and Stenorhynchus seticornis (407) representing more than 60% of the sample. On the other hand, Dromia erythropus, Moreiradromia antilensis, Ebalia stimpsoni, Garthiope spinipes and Tumidotheres maculatus had only one individual sampled.


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