Search results for "evolution"
showing 10 items of 11096 documents
Interkingdom Gut Microbiome and Resistome of the Cockroach Blattella germanica
2021
Cockroaches are intriguing animals with two coexisting symbiotic systems, an endosymbiont in the fat body, involved in nitrogen metabolism, and a gut microbiome whose diversity, complexity, role, and developmental dynamics have not been fully elucidated. In this work, we present a metagenomic approach to study Blattella germanica populations not treated, treated with kanamycin, and recovered after treatment, both naturally and by adding feces to the diet, with the aim of better understanding the structure and function of its gut microbiome along the development as well as the characterization of its resistome.
Size-dependent aggression towards kin in a cannibalistic species.
2022
Abstract In juveniles extreme intraspecies aggression can seem counter-intuitive, as it might endanger their developmental goal of surviving until reproductive stage. Ultimately, aggression can be vital for survival, although the factors (e.g., genetic or environmental) leading to the expression and intensity of this behavior vary across taxa. Attacking (and sometimes killing) related individuals may reduce inclusive fitness; as a solution to this problem, some species exhibit kin discrimination and preferentially attack unrelated individuals. Here, we used both experimental and modeling approaches to consider how physical traits (e.g., size in relation to opponent) and genetic relatedness …
Expanding Acutuncus : Phylogenetics and morphological analyses reveal a considerably wider distribution for this tardigrade genus
2023
The tardigrade genus Acutuncus has been long thought to be an Antarctic endemism, well adapted to this harsh environment. The Antarctic endemicity of Acutuncus was recently dispelled with the description of Acutuncus mariae Zawierucha, 2020 found in the Svalbard archipelago. The integrated analyses on two newly found Acutuncus populations from UK and Italy, and a population of Acutuncus antarcticus found close to its type locality allowed us to expand the climatic and geographic range of the genus Acutuncus. These findings also allowed us to re-evaluate the morphological diagnoses of Acutuncus and accommodate it in the newly proposed monotypic family Acutuncidae fam. nov. Two new Acutuncus …
The toughest animals of the Earth versus global warming: Effects of long-term experimental warming on tardigrade community structure of a temperate d…
2021
Abstract Understanding how different taxa respond to global warming is essential for predicting future changes and elaborating strategies to buffer them. Tardigrades are well known for their ability to survive environmental stressors, such as drying and freezing, by undergoing cryptobiosis and rapidly recovering their metabolic function after stressors cease. Determining the extent to which animals that undergo cryptobiosis are affected by environmental warming will help to understand the real magnitude climate change will have on these organisms. Here, we report on the responses of tardigrades within a five‐year‐long, field‐based artificial warming experiment, which consisted of 12 open‐to…
Allium sphaeronixum (Amaryllidaceae), A New Species from Turkey
2023
In this paper, Allium sphaeronixum, a new species of the sect. Codonoprasum from Turkey, is described and illustrated. The new species is endemic to Central Anatolia, limited to the area of Nevşehir, where it grows on sandy or rocky soil at an elevation of 1000–1300 m a.s.l. Its morphology, phenology, karyology, leaf anatomy, seed testa micromorphology, chorology, and conservation status are examined in detail. The taxonomic relationships with the closest allied species, A. staticiforme and A. myrianthum, are also highlighted and discussed.
Velka, vararikko ja tuomio : konkurssi ja sen merkitykset 1800-luvun suomalaisissa kaupungeissa
2017
This dissertation makes use of legal documents and ancillary official sources revealing the life courses of individuals to explore the implications of bankruptcy and the meanings attached to it at a time when Finnish society industrialized and modernized. Three perspectives serve to support the analysis. At the heart of the study is the domestic economy. Thus the study is concerned with cases of bankruptcy ruin both during life and also after death. Secondly, bankruptcy is addressed as an indicator of economic dynamism and entrepreneurial spirit. Thirdly, attitudes to bankruptcy are approached from the perspective of legal and social forgiveness. The era of industrialization gave rise to ev…
A bibliometric approach to finding fields that co-evolved with information technology
2020
Among the declining industries, for example music industry, some have been revived by information technology (IT). At the same time, in academic fields, some have expected co-evolutions between IT and other fields to cause the resurgence of either field. In this research, the clustering of citation networks with 14,438 academic papers resulted in the identification of 28 academic fields in the areas “Computer Science” or “Information Science and Library Science.” Co-evolutions between these 28 fields and citing fields to the 28 fields were evaluated by an investigation of contents; a methodology to search co-evolutions was also proposed. This paper proposes that pairs of academic fields (wi…
Partycypacja na siłę i jej nieoczekiwane konsekwencje: państwowy socjalizm a nowoczesna klasa robotnicza
2016
W artykule omawiane są przemiany społeczne w Polsce, przyniesione przez państwowy socjalizm po drugiej wojnie światowej. Opierając się na założeniu o „prześnionej rewolucji” (Leder 2014), argumentuje, że metody, którymi ówczesne władze mobilizowały ludzi do działania, nosiły znamiona partycypacji społecznej, choć w wielu przypadkach była to partycypacja inspirowana, a nawet wymuszona. Jako element mobilizacji społecznej przyczyniła się do uprawomocnienia klas niższych – robotników i chłopów. Skutkiem tego procesu była zdolność tych klas do podjęcia dyskusji z decydentami, dzięki czemu początkowi „beneficjenci” socjalizmu nie tylko byli w stanie sprzeciwić się aparatowi partyjnemu i przyczyn…
The effect of the genetic background on phage infectivity in an encapsulated host
2023
Los bacteriófagos desempeñan un papel clave en la ecología y evolución bacterianas y son potenciales antimicrobianos. Sin embargo, los factores determinantes de la especificidad fago-hospedador siguen siendo poco conocidos. Debido a la prevalencia de bacterias encapsuladas, la cápsula es la primera barrera que encuentran muchos fagos. Esta capa, normalmente de polisacáridos, puede bloquear el acceso de los fagos a los receptores de su pared celular. Para superarla, algunos fagos codifican dominios depolimerasa (Dpos) específicos en sus proteínas de unión a receptores. En este trabajo, hemos cuantificado la predictibilidad de las interacciones fago-bacteria basándonos en el tipo de locus cap…
Learning to learn in universities 4.0. Human Obsolescence and short-term change
2020
The 4th Industrial Revolution has modified the model of society worldwide. Short-term change has taken hold of everyday life, and people who do not cope with it become obsolete. Under this scenario, the life and work of the university graduates became fickle since their near future grows in uncertainty. Thus, we aimed to shed light on human optimization pathways from Higher Education in the knowledge-based society and economy, which made possible a new industry. In this line, we conducted an analysis underpinned by critical hermeneutics from educational policy proposals, research findings, and analytical philosophy. After analyzing the context, the person, and the learning needs, we offered…