scholarly journals Corals and Sponges Under the Light of the Holobiont Concept: How Microbiomes Underpin Our Understanding of Marine Ecosystems

2021 ◽  
Vol 8 ◽  
Author(s):  
Chloé Stévenne ◽  
Maud Micha ◽  
Jean-Christophe Plumier ◽  
Stéphane Roberty
Keyword(s):  
Marine Biology ◽  
New Technologies ◽  
Environmental Changes ◽  
Current Knowledge ◽  
Marine Ecosystems ◽  
Marine Organisms ◽  
New Paradigm ◽  
Symbiotic Relationships ◽  
The Face ◽  
History Of

In the past 20 years, a new concept has slowly emerged and expanded to various domains of marine biology research: the holobiont. A holobiont describes the consortium formed by a eukaryotic host and its associated microorganisms including bacteria, archaea, protists, microalgae, fungi, and viruses. From coral reefs to the deep-sea, symbiotic relationships and host–microbiome interactions are omnipresent and central to the health of marine ecosystems. Studying marine organisms under the light of the holobiont is a new paradigm that impacts many aspects of marine sciences. This approach is an innovative way of understanding the complex functioning of marine organisms, their evolution, their ecological roles within their ecosystems, and their adaptation to face environmental changes. This review offers a broad insight into key concepts of holobiont studies and into the current knowledge of marine model holobionts. Firstly, the history of the holobiont concept and the expansion of its use from evolutionary sciences to other fields of marine biology will be discussed. Then, the ecology and physiology of marine holobionts will be investigated through the examples of corals and sponges. We will discuss the impacts of environmental change on organisms at the holobiont level and how microbiomes contribute to the resilience and/or vulnerability of their host in the face of environmental stressors. Finally, we will conclude with the development of new technologies, holistic approaches, and future prospects for conservation biology surrounding marine holobionts.

scholarly journals Microbial Colonization in Marine Environments: Overview of Current Knowledge and Emerging Research Topics

2020 ◽  
Vol 8 (2) ◽  
pp. 78 ◽  
Author(s):  
Gabriella Caruso
Keyword(s):  
Microbial Communities ◽  
Environmental Changes ◽  
Current Knowledge ◽  
Cell Communication ◽  
Marine Ecosystems ◽  
Microbial Colonization ◽  
Artificial Substrates ◽  
Environmental Drivers ◽  
Future Research ◽  
Microbial Biofilms

Microbial biofilms are biological structures composed of surface-attached microbial communities embedded in an extracellular polymeric matrix. In aquatic environments, the microbial colonization of submerged surfaces is a complex process involving several factors, related to both environmental conditions and to the physical-chemical nature of the substrates. Several studies have addressed this issue; however, more research is still needed on microbial biofilms in marine ecosystems. After a brief report on environmental drivers of biofilm formation, this study reviews current knowledge of microbial community attached to artificial substrates, as obtained by experiments performed on several material types deployed in temperate and extreme polar marine ecosystems. Depending on the substrate, different microbial communities were found, sometimes highlighting the occurrence of species-specificity. Future research challenges and concluding remarks are also considered. Emphasis is given to future perspectives in biofilm studies and their potential applications, related to biofouling prevention (such as cell-to-cell communication by quorum sensing or improved knowledge of drivers/signals affecting biological settlement) as well as to the potential use of microbial biofilms as sentinels of environmental changes and new candidates for bioremediation purposes.

Technology-Infused Instruction

2005 ◽  
pp. 49-63
Author(s):  
Rose M. Mautino ◽  
Stefan L. Biancaniello
Keyword(s):  
Literacy Instruction ◽  
Teaching And Learning ◽  
New Technologies ◽  
First Century ◽  
New Paradigm ◽  
Constant Change ◽  
Essential Questions ◽  
The Face ◽  
New Ideas ◽  
Approach To Teaching

This chapter introduces a model of technology-infused literacy instruction that implements a constructivist approach to teaching and learning that defines a new paradigm for the classroom of the twenty-first century. It argues that in the face of the constant change process that is redefining literacy instruction today, it will be necessary to rethink our curriculum and redesign our instruction to infuse new technologies. In this new paradigm it will be necessary to not only ask different questions, but also to redefine the context in which the questions are posed. Students learning must focus on exploration, investigation, paradoxes, and inquiries. We must teach students to start their inquiries with “essential questions” in mind, and to seek not answers but rather new questions, new theories, and new ideas. The technologies of literacy in the future will need to function as cognitive tools that guide students in the generation of the concentric circles of lifelong learning.

scholarly journals Richard Dawkins, Philip Kennedy and the Augustinian paradigm of Christianity

2019 ◽  
Vol 75 (3) ◽  
Author(s):  
Izak J.J. Spangenberg
Keyword(s):  
Evolutionary Biology ◽  
Current Knowledge ◽  
Natural Sciences ◽  
Paradigm Change ◽  
New Paradigm ◽  
Richard Dawkins ◽  
The Bible ◽  
History Of ◽  
Darwinian Paradigm

Both Richard Dawkins’s book The God Delusion and Philip Kennedy’s book A Modern Introduction to Theology: New Questions for Old Beliefs were published in 2006. This article aims to compare the two books and to argue that Kennedy does not oppose Dawkins’s views but, in fact, debates along similar lines. Kennedy is adamant that the Augustinian paradigm of Christianity no longer makes sense, because it is based on an outdated cosmology and anthropology. He firmly maintains that Christianity requires a new paradigm, which is informed by our current knowledge and worldview. Thomas Kuhn’s ideas of paradigm and paradigm changes in the history of natural sciences are utilised in comparing the books, seeing that Dawkins accepts and works within the Darwinian paradigm of evolutionary biology, and Kennedy argues that Christians and Christian theologians adhere to the Augustinian paradigm of Fall-Redemption-Judgement. It is argued that Dawkins should have referred to the paradigm change in the study of the Bible, which occurred towards the end of the 19th and the beginning of the 20th centuries, and the plea of theologians, like Kennedy, for a paradigm change in theology. The article concludes that only a paradigm change in Christianity, which is in line with the modern worldview, will enable Christians to keep the tradition alive.

An Archaeology and History of a Caribbean Sugar Plantation on Antigua

2020 ◽  
Keyword(s):  
New Technologies ◽  
Soil Analysis ◽  
Heritage Management ◽  
Sugar Plantation ◽  
The Face ◽  
History Of ◽  
Rich Information ◽  
The Rich ◽  
Slave Quarters ◽  
Historical Developments

An Archaeology and History of a Caribbean Sugar Plantation on Antigua uses archaeological and documentary evidence to reconstruct daily life at Betty’s Hope plantation on the island of Antigua, one of the largest sugar plantations in the Caribbean. It demonstrates the rich information that the multidisciplinary approach of contemporary historical archaeology can offer when assessing the long-term impacts of sugarcane agriculture on the region and its people. Drawing on ten years of research at the 300-year-old site, the researchers uncover the plantation’s inner workings and its connections to broader historical developments in the Atlantic World. Excavations at the Great House reveal similarities to other British colonial sites, and historical records reveal the owners’ involvement in the Atlantic slave trade and in the trade of rum and other commodities. Artifacts uncovered from the slave quarters—ceramic tokens, repurposed bottle glass, and hundreds of Afro-Antiguan pottery sherds—speak to the agency of enslaved peoples in the face of harsh living conditions. Contributors also use ethnographic field data collected from interviews with contemporary farmers, as well as soil analysis to demonstrate how three centuries of sugarcane monocropping created a complicated legacy of soil depletion. Today tourism has long surpassed sugar as Antigua’s primary economic driver. Looking at visitor exhibits and new technologies for exploring and interpreting the site, the volume discusses best practices in cultural heritage management at Betty’s Hope and other locations that are home to contested historical narratives of a colonial past.

scholarly journals The challenges of detecting and attributing ocean acidification impacts on marine ecosystems

2020 ◽  
Author(s):  
Steve S Doo ◽  
Andrea Kealoha ◽  
Andreas Andersson ◽  
Anne L Cohen ◽  
Tacey L Hicks ◽  
...  
Keyword(s):  
Ocean Acidification ◽  
Industrial Revolution ◽  
Environmental Changes ◽  
Marine Ecosystem ◽  
Population Level ◽  
Marine Species ◽  
Marine Ecosystems ◽  
Marine Organisms ◽  
Comparative Approach ◽  
Natural Environments

Abstract A substantial body of research now exists demonstrating sensitivities of marine organisms to ocean acidification (OA) in laboratory settings. However, corresponding in situ observations of marine species or ecosystem changes that can be unequivocally attributed to anthropogenic OA are limited. Challenges remain in detecting and attributing OA effects in nature, in part because multiple environmental changes are co-occurring with OA, all of which have the potential to influence marine ecosystem responses. Furthermore, the change in ocean pH since the industrial revolution is small relative to the natural variability within many systems, making it difficult to detect, and in some cases, has yet to cross physiological thresholds. The small number of studies that clearly document OA impacts in nature cannot be interpreted as a lack of larger-scale attributable impacts at the present time or in the future but highlights the need for innovative research approaches and analyses. We summarize the general findings in four relatively well-studied marine groups (seagrasses, pteropods, oysters, and coral reefs) and integrate overarching themes to highlight the challenges involved in detecting and attributing the effects of OA in natural environments. We then discuss four potential strategies to better evaluate and attribute OA impacts on species and ecosystems. First, we highlight the need for work quantifying the anthropogenic input of CO2 in coastal and open-ocean waters to understand how this increase in CO2 interacts with other physical and chemical factors to drive organismal conditions. Second, understanding OA-induced changes in population-level demography, potentially increased sensitivities in certain life stages, and how these effects scale to ecosystem-level processes (e.g. community metabolism) will improve our ability to attribute impacts to OA among co-varying parameters. Third, there is a great need to understand the potential modulation of OA impacts through the interplay of ecology and evolution (eco–evo dynamics). Lastly, further research efforts designed to detect, quantify, and project the effects of OA on marine organisms and ecosystems utilizing a comparative approach with long-term data sets will also provide critical information for informing the management of marine ecosystems.

The glycomes of Caenorhabditis elegans and other model organisms

2002 ◽  
Vol 69 ◽  
pp. 117-134 ◽  
Author(s):  
Stuart M. Haslam ◽  
David Gems ◽  
Howard R. Morris ◽  
Anne Dell
Keyword(s):  
Caenorhabditis Elegans ◽  
Current Knowledge ◽  
Structural Data ◽  
Model Organisms ◽  
Entire Genome ◽  
C Elegans ◽  
The Face ◽  
Area Of Concern ◽  
Nematode Worm

There is no doubt that the immense amount of information that is being generated by the initial sequencing and secondary interrogation of various genomes will change the face of glycobiological research. However, a major area of concern is that detailed structural knowledge of the ultimate products of genes that are identified as being involved in glycoconjugate biosynthesis is still limited. This is illustrated clearly by the nematode worm Caenorhabditis elegans, which was the first multicellular organism to have its entire genome sequenced. To date, only limited structural data on the glycosylated molecules of this organism have been reported. Our laboratory is addressing this problem by performing detailed MS structural characterization of the N-linked glycans of C. elegans; high-mannose structures dominate, with only minor amounts of complex-type structures. Novel, highly fucosylated truncated structures are also present which are difucosylated on the proximal N-acetylglucosamine of the chitobiose core as well as containing unusual Fucα1–2Gal1–2Man as peripheral structures. The implications of these results in terms of the identification of ligands for genomically predicted lectins and potential glycosyltransferases are discussed in this chapter. Current knowledge on the glycomes of other model organisms such as Dictyostelium discoideum, Saccharomyces cerevisiae and Drosophila melanogaster is also discussed briefly.

Luxury Communist Jesus

2016 ◽  
Vol 7 (3) ◽  
pp. 245-255 ◽  
Author(s):  
Michael J. Sandford
Keyword(s):  
Work Ethic ◽  
Protestant Work Ethic ◽  
The Face ◽  
History Of ◽  
The Protestant Work Ethic

This article begins by outlining contemporary anti-work politics, which form the basis of Sandford’s reading. After providing a brief history of anti-work politics, Sandford examines recent scholarly treatments of Jesus’ relationship to work. An examination of a number of texts across the gospel traditions leads Sandford to argue that Jesus can be read as a ‘luxury communist’ whose behaviour flies in the face of the Protestant work ethic. Ultimately, Sandford foregrounds those texts in which Jesus discourages his followers from working, and undermines work as an ‘end in itself’, contextualising these statements in relation to other gospel texts about asceticism and the redistribution of wealth.

Paleontology and stratigraphy of Middle Eocene rock units in the southern Green River and Uinta Basins, Wyoming and Utah

2017 ◽  
Vol 4 ◽  
pp. 1-53 ◽  
Author(s):  
Paul Murphey ◽  
K.E. Townsend ◽  
Anthony Friscia ◽  
James Westgate ◽  
Emmett Evanoff ◽  
...  
Keyword(s):  
Current Knowledge ◽  
Middle Eocene ◽  
Green River Basin ◽  
Green River ◽  
Scientific Exploration ◽  
History Of ◽  
Climatic History ◽  
Field Excursion ◽  
Land Mammal ◽  
Bridger Formation

The Bridger Formation is restricted to the Green River Basin in southwest Wyoming, and the Uinta and Duchesne River Formations are located in the Uinta Basin in Utah. These three rock units and their diverse fossil assemblages are of great scientific importance and historic interest to vertebrate paleontologists. Notably, they are also the stratotypes from oldest to youngest for the three middle Eocene North American Land Mammal Ages—the Bridgerian, Uintan, and Duchesnean. The fossils and sediments of these formations provide a critically important record of biotic, environmental, and climatic history spanning approximately 10 million years (49 to 39 Ma). This article provides a detailed field excursion through portions of the Green River and Uinta Basins that focuses on locations of geologic, paleontologic, and historical interest. In support of the field excursion, we also provide a review of current knowledge of these formations with emphasis on lithostratigraphy, biochronology, depositional, and paleoenvironmental history, and the history of scientific exploration.

The sugar and alcohol industry in the biofuels and cogeneration era: a paradigm change (part II)

2014 ◽  
pp. 97-104 ◽  
Author(s):  
Electo Eduardo Silv Lora ◽  
Mateus Henrique Rocha ◽  
José Carlos Escobar Palacio ◽  
Osvaldo José Venturini ◽  
Maria Luiza Grillo Renó ◽  
...  
Keyword(s):  
Large Scale ◽  
New Technologies ◽  
Process Integration ◽  
Animal Feed ◽  
Raw Materials ◽  
Biofuel Production ◽  
New Paradigm ◽  
Alcohol Industry ◽  
Feed Production ◽  
Steam Parameters

The aim of this paper is to discuss the major technological changes related to the implementation of large-scale cogeneration and biofuel production in the sugar and alcohol industry. The reduction of the process steam consumption, implementation of new alternatives in driving mills, the widespread practice of high steam parameters use in cogeneration facilities, the insertion of new technologies for biofuels production (hydrolysis and gasification), the energy conversion of sugarcane trash and vinasse, animal feed production, process integration and implementation of the biorefinery concept are considered. Another new paradigm consists in the wide spreading of sustainability studies of products and processes using the Life Cycle Assessment (LCA) and the implementation of sustainability indexes. Every approach to this issue has as an objective to increase the economic efficiency and the possibilities of the sugarcane as a main source of two basic raw materials: fibres and sugar. The paper briefly presents the concepts, indicators, state-of-the-art and perspectives of each of the referred issues.

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