Consulta: subjectFacets:"Coevolution"
Registros recuperados: 7
Data/hora: 10/06/2024 02:28:25

Could human coronavirus OC43 have co-evolved with early humans?
Provedor de dados: 74
Autores: Brandão,Paulo Eduardo.
Abstract This paper reports on an investigation of the role of codon usage evolution on the suggested bovine-to-human spillover of Bovine coronavirus (BCoV), an enteric/respiratory virus of cattle, resulting in the emergence of the exclusively respiratory Human coronavirus OC43 (HCoV-OC43). Analyses based on full genomes of BCoV and HCoV-OC43 and on both human and bovine mRNAs sequences of cholecystokinin (CCK) and surfactant protein 1 A (SFTP1-A), representing the enteric and respiratory tract codon usage, respectively, have shown natural selection leading to optimization or deoptimization of viral codon usage to the human enteric and respiratory tracts depending on the virus genes under consideration. A higher correlation was found for the nucleotide...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Codon usage; Coronavirus; Spillover; Coevolution.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572018000400692

Hologenome theory supported by cooccurrence networks of species-specific bacterial communities in siphonous algae (Caulerpa)
Provedor de dados: 5
Autores: Aires, Tania; Moalic, Yann; Serrao, Ester; Arnaud-haond, Sophie.
The siphonous algae of the Caulerpa genus harbor internal microbial communities hypothesized to play important roles in development, defense and metabolic activities of the host. Here, we characterize the endophytic bacterial community of four Caulerpa taxa in the Mediterranean Sea, through 16S rRNA amplicon sequencing. Results reveal a striking alpha diversity of the bacterial communities, similar to levels found in sponges and coral holobionts. These comprise (1) a very small core community shared across all hosts (&lt; 1% of the total community), (2) a variable portion (ca. 25%) shared by some Caulerpa taxa but not by all, which might represent environmentally acquired bacteria and (3) a large (&gt; 70%) species-specific fraction of the community,...
Tipo: Text
Palavras-chave: Endophytic bacteria; Bacterial community; Cooccurrence network; Modularity; Coevolution.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00277/38800/37699.pdf

Adaptations of lichens to conditions in tropical forests of South-East Asia and their taxonomic implications
Provedor de dados: 16
Autores: Wolseley, P.A.; Hawksworth, D.L.
Lichens are fungi with a specialized nutritional mode involving algae, or cyanobacteria, or both. Classification is based on the fungal partner, and around 13 500 species are known. The association is ancient, and the first ascomycete fungi with fruit bodies may have been lichenized. Adaptations to tropical habitats include extensive utilization of trentepohlioid algae, the production of large multi-celled spores capable of forming numerous germ tubes, and water-repellant hydophobins coating internal cell walls. Many tropical groups lack modern monographs and numerous new species are discovered in detailed studies. Lichens merit more attention in the tropics as bioindicators of habitat disturbance.
Tipo: Article / Letter to the editor
Palavras-chave: Algae; Ascomycota; Bioindication; Coevolution; Symbiosis.
Ano: 2009
URL: http://www.repository.naturalis.nl/record/525176

Trophobiosis Between Formicidae and Hemiptera (Sternorrhyncha and Auchenorrhyncha): an Overview
Provedor de dados: 82
Autores: DELABIE,JACQUES H.C.
In this paper, the mutualistic relationship known as trophobiosis, which occurs convergently between ants and several groups of Hemiptera Sternorrhyncha and Auchenorrhyncha (formerly 'Homoptera') is reviewed. The main characteristics of 'Homoptera' and Formicidae which favor trophobiotic interactions, such as honeydew excretion by sap-sucking insects, ant attendance and physiological needs of both insects groups, are discussed. Aspects of the convergent evolution are presented. The most archaic system is not trophobiotic per se, foragers collect the honeydew casually expelled on the foliage by individuals or groups of non-associated 'Homoptera'. The commonest trophobiotic relationships are facultative; therefore, this form of mutualism is extremely...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Insect/insect relationships; Plant/insect relationships; Mutualism; Coevolution.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2001000400001

Coevolution: Agricultural Practices and Sustainability: Some Major Social and Ecological Issues
Provedor de dados: 31
Autores: Tisdell,   Clement A.
Outlines major social and ecological issues involved in the coevolution of social and ecological systems by initially reviewing relevant aspects of the recent literature relating to economic development and their implications for agricultural development.  Coevolutionary qualitative-type models are presented.  There has been a failure amongst advocates of structural adjustment policies (involving the extension of markets and economic globalisation) to take account of coevolutionary principles and allow for historical differences in the evolution of communities and their varied circumstances.  This lack of sensitivity has had unfortunate social and ecological consequences for some communities eg  The Russian Federation and subsistence agriculturalists in...
Tipo: Working or Discussion Paper
Palavras-chave: Coevolution; Globalisation; Industrial/commercial agriculture; Property rights; Ecological systems; Social systems; Agricultural and Food Policy; Environmental Economics and Policy.
Ano: 1999
URL: http://purl.umn.edu/47991

How specialists can be generalists: resolving the "parasite paradox" and implications for emerging infectious disease
Provedor de dados: 103
Autores: Agosta,Salvatore J.; Janz,Niklas; Brooks,Daniel R.
The parasite paradox arises from the dual observations that parasites (broadly construed, including phytophagous insects) are resource specialists with restricted host ranges, and yet shifts onto relatively unrelated hosts are common in the phylogenetic diversification of parasite lineages and directly observable in ecological time. We synthesize the emerging solution to this paradox: phenotypic flexibility and phylogenetic conservatism in traits related to resource use, grouped under the term ecological fitting, provide substantial opportunities for rapid host switching in changing environments, in the absence of the evolution of novel host-utilization capabilities. We discuss mechanisms behind ecological fitting, its implications for defining specialists...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Climate change; Coevolution; Ecological fitting; Host shift; Plant-insect interactions; Sloppy fitness.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000200001

New host records of Aglaomelissa duckei and a compilation of host associations of Ericrocidini bees (Hymenoptera: Apidae)
Provedor de dados: 103
Autores: Rocha-Filho,Léo C.; Morato,Élder F.; Melo,Gabriel A. R.
For the first time, confirmed host records are reported for the monotypic Ericrocidini genus Aglaomelissa Snelling &amp;amp; Brooks, 1985. Aglaomelissa duckei (Friese, 1906) emerged from trap-nests of Centris (Heterocentris) analis (Fabricius, 1804) and C. (Heterocentris) terminata Smith, 1874 from two sites in the Brazilian Amazonian region. The parasitism ratio caused by A. duckei was high, varying from 80 to 100% of the brood cells in a single trap-nest. Also, a compilation of the known host records for the species of Ericrocidini is presented and host-parasite associations are discussed. Host associations are known for seven of the 11 genera and about 17 of the 42 species of the tribe, involving a total of 34 confirmed or putative host species of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apoidea; Cleptoparasitism; Centris; Neotropical; Coevolution.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000200012