Search results for "Colonization"

Kerguelen, un archipel sous haute surveillance

2016

Avec ses côtes découpées et sans cesse battues par les vents, les Kerguelen sont restées longtemps inaccessibles aux biologistes marins. Si sa situation géographique et son isolement exceptionnels rendent cet archipel particulièrement vulnérable aux changements climatiques, ils en font aussi un laboratoire idéal pour en étudier les effets…

Review of “Marine Hard Substrates: Colonization and Evolution,” a Thematic Session at the Geological Society of America Annual Meeting, Denver, USA, …

2005

A theme session, jointly sponsored by the Paleontological Society and the Geological Society of America Sedimentary Geology division, and entitled “Marine Hard Substrates: Colonization and Evolutio...

Transposon-insertion Sequencing as a Tool to Elucidate Bacterial Colonization Factors in a <em>Burkholderia gladioli</em> Symbiont of &lt…

2021

Inferring the function of genes by manipulating their activity is an essential tool for understanding the genetic underpinnings of most biological processes. Advances in molecular microbiology have seen the emergence of diverse mutagenesis techniques for the manipulation of genes. Among them, transposon-insertion sequencing (Tn-seq) is a valuable tool to simultaneously assess the functionality of many candidate genes in an untargeted way. The technique has been key to identify molecular mechanisms for the colonization of eukaryotic hosts in several pathogenic microbes and a few beneficial symbionts. Here, Tn-seq is established as a method to identify colonization factors in a mutualistic Bu…

Transnationalism and Settlement of Latvian Emigrants in the Nordic Countries

2021

The intra-European migration flows have fostered debates about the intentions of migrants to settle in their destination country or return to their countries of origin. Based on a quantitative analysis of survey data ('N' = 1391), this article presents a typology of migration patterns among migrants from Latvia in the Nordic countries. Using two dimensions—attachment to the destination country and attachment to the country of origin—the article identifies and characterises the following four migration patterns: (1) bi-nationals, (2) settlers, (3) footloose migrants and (4) isolated migrants who focus on their country of origin and are willing to return (separated).

Temporal dynamic of biofilms enhances the settlement of the central-Mediterranean reef-builder Dendropoma cristatum (Biondi, 1859).

2021

Abstract Research on marine invertebrate settlement provides baseline knowledge for restoration technique implementation, especially for biogenic engineers with limited dispersion ability. Previously, we determined that the maturity of a biofilm strongly enhances the settlement of the vermetid reef-builder Dendropoma cristatum. To elucidate settlement-related biofilm features, here we analyse the structure and composition of marine biofilms over time, through microscopic observations, eukaryotic and prokaryotic fingerprinting analyses and 16S rDNA Illumina sequencing. The vermetid settlement temporal increase matched with the higher biofilm coverage on the substratum and the reduction of th…

The global economic crisis as a critical Juncture? The crisis's impact on migration movements and policies in Europe and the US

2016

The current global economic crisis has resulted in the strongest recession in the Organisation for Economic Cooperation and Development (OECD) countries since the Great Depression in the early 1930s and the 1970s oil shocks. This special issue sets out to explore how the most recent economic crisis impacted immigration and immigration-related policy in the United States of America and in European countries that are part of the OECD. The crisis of the late 2000s was offset by the collapse of the subprime US housing market, destabilising the financial system and leading to a sovereign debt crisis. The shock was marked by a “sudden […] deterioration of most, or all, key macroeconomic indicator…

Abundance of NARG, NIRK and NOSZ genes of denirifying bacteria during primary successions of a glacier foreland

2007

Methods for studying root colonization by introduced beneficial bacteria

2003

e-Book; Some free-living rhizobacteria are considered as potential biocontrol and plant growth-promoting agents. Successful application of beneficial bacteria as microbial inoculants requires their presence and activity at the appropriate level, but even more, at the right time and place. Various markers are described in the literature to differentiate introduced bacteria from indigenous microflora and to visualize them. These markers are presented together with the methods currently applied to quantify bacterial densities and to characterize the distribution of introduced bacteria. The methods to quantify bacterial densities are either based on bacterial cultivation or not. Different types…

Do the high phenotypic plasticity of A. artemisiifolia L. explain its invasive success in France?

2008

International audience; Ambrosia artemisiifolia (Asteraceae) is an invasive annual plant introduced from North America to Europe over 100 years ago. This plant species is now widespread in numerous countries all over the world, causing damages to agricultural crops and human health. Ambrosia artemisiifolia is spreading as a weed in many field crops but is also able to invade a wide range of areas such as various human disturbed habitats or riverbanks (Figure 1). A considerable variability of the life history traits of A. artemisiifolia was previously observed among and within different populations (Fumanal et al., 2007). Since the success of colonization of some invasive plant species may r…

Studies of root colonization by a microcosm community of arbuscular mycorrhizal fungi unsing nested PCR

1998

International audience