Éditeur(s) : United States Virgin Islands. Department of Planning and Natural Resources. Division of Fish and Wildlife. United States Virgin Islands. Department of Planning and Natural Resources. Division of Fish and Wildlife.
North America -- United States Virgin Islands
Caribbean
Caribbean

Éditeur(s) : United States Virgin Islands. Department of Planning and Natural Resources. Division of Fish and Wildlife. United States Virgin Islands. Department of Planning and Natural Resources. Division of Fish and Wildlife.
North America -- United States Virgin Islands
Caribbean
Caribbean

Éditeur(s) : Division of Fish and Wildlife, Department of Planning and Natural Resources, United States Virgin Islands Division of Fish and Wildlife, Department of Planning and Natural Resources, United States Virgin Islands ( St. Thomas, VI )

Éditeur(s) : United States Virgin Islands. Department of Planning and Natural Resources. Division of Fish and Wildlife. United States Virgin Islands. Department of Planning and Natural Resources. Division of Fish and Wildlife.
North America -- United States Virgin Islands
Caribbean
Caribbean

Éditeur(s) : HAL CCSD Public Library of Science
Résumé : Simple sequence repeat (SSR) markers are widely used tools for inferences about genetic diversity, phylogeography and spatial genetic structure. Their applications assume that variation among alleles is essentially caused by an expansion or contraction of the number of repeats and that, accessorily, mutations in the target sequences follow the stepwise mutation model (SMM). Generally speaking, PCR amplicon sizes are used as direct indicators of the number of SSR repeats composing an allele with the data analysis either ignoring the extent of allele size differences or assuming that there is a direct correlation between differences in amplicon size and evolutionary distance. However, without precisely knowing the kind and distribution of polymorphism within an allele (SSR and the associated flanking region (FR) sequences), it is hard to say what kind of evolutionary message is conveyed by such a synthetic descriptor of polymorphism as DNA amplicon size. In this study, we sequenced several SSR alleles in multiple populations of three divergent tree genera and disentangled the types of polymorphisms contained in each portion of the DNA amplicon containing an SSR. The patterns of diversity provided by amplicon size variation, SSR variation itself, insertions/deletions (indels), and single nucleotide polymorphisms (SNPs) observed in the FRs were compared. Amplicon size variation largely reflected SSR repeat number. The amount of variation was as large in FRs as in the SSR itself. The former contributed significantly to the phylogenetic information and sometimes was the main source of differentiation among individuals and populations contained by FR and SSR regions of SSR markers. The presence of mutations occurring at different rates within a marker's sequence offers the opportunity to analyse evolutionary events occurring on various timescales, but at the same time calls for caution in the interpretation of SSR marker data when the distribution of within-locus polymorphism is not known.
ISSN: 1932-6203

hal-01190764
https://hal.archives-ouvertes.fr/hal-01190764
PRODINRA : 214530
PUBMED : 22808236
DOI : 10.1371/journal.pone.0040699

Éditeur(s) : Division of Fish and Wildlife, Department of Planning and Natural Resources, United States Virgin Islands Division of Fish and Wildlife, Department of Planning and Natural Resources, United States Virgin Islands ( St. Thomas, VI )

Éditeur(s) : United States Virgin Islands. Department of Planning and Natural Resources. Division of Fish and Wildlife. United States Virgin Islands. Department of Planning and Natural Resources. Division of Fish and Wildlife.
North America -- United States Virgin Islands
Caribbean
Caribbean

Éditeur(s) : United States Virgin Islands. Department of Planning and Natural Resources. Division of Fish and Wildlife. United States Virgin Islands. Department of Planning and Natural Resources. Division of Fish and Wildlife.
North America -- United States Virgin Islands
Caribbean
Caribbean

Éditeur(s) : HAL CCSD Wiley-VCH Verlag
Résumé : International audience
Deciphering the assembly history of the Milky Way is a formidable task, which becomes possible only if one can produce high-resolution chrono-chemo-kinematical maps of the Galaxy. Data from large-scale astrometric and spectroscopic surveys will soon provide us with a well-defined view of the current chemo-kinematical structure of the Milky Way, but will only enable a blurred view on the temporal sequence that led to the present-day Galaxy. As demonstrated by the (ongoing) exploitation of data from the pioneering photometric missions CoRoT, Kepler, and K2, asteroseismology provides the way forward: solar-like oscillating giants are excellent evolutionary clocks thanks to the availability of seismic constraints on their mass and to the tight age-initial-mass relation they adhere to. In this paper we identify five key outstanding questions relating to the formation and evolution of the Milky Way that will need precise and accurate ages for large samples of stars to be addressed, and we identify the requirements in terms of number of targets and the precision on the stellar properties that are needed to tackle such questions. By quantifying the asteroseismic yields expected from PLATO for red-giant stars, we demonstrate that these requirements are within the capabilities of the current instrument design, provided that observations are sufficiently long to identify the evolutionary state and allow robust and precise determination of acoustic-mode frequencies. This will allow us to harvest data of sufficient quality to reach a 10% precision in age. This is a fundamental pre-requisite to then reach the more ambitious goal of a similar level of accuracy, which will only be possible if we have to hand a careful appraisal of systematic uncertainties on age deriving from our limited understanding of stellar physics, a goal which conveniently falls within the main aims of PLATO's core science.
ISSN: 0004-6337

hal-01541393
https://hal.archives-ouvertes.fr/hal-01541393
ARXIV : 1706.3778
BIBCODE : 2017AN....338..644M
DOI : 10.1002/asna.201713385

Éditeur(s) : United States Virgin Islands. Department of Planning and Natural Resources. Division of Fish and Wildlife. United States Virgin Islands. Department of Planning and Natural Resources. Division of Fish and Wildlife.
North America -- United States Virgin Islands
Caribbean
Caribbean

Éditeur(s) : United States Virgin Islands. Department of Planning and Natural Resources. Division of Environmental Protection. United States Virgin Islands. Department of Planning and Natural Resources. Division of Environmental Protection.
North America -- United States Virgin Islands
Caribbean

Éditeur(s) : Division of Fish and Wildlife, Department of Planning and Natural Resources, United States Virgin Islands Division of Fish and Wildlife, Department of Planning and Natural Resources, United States Virgin Islands ( St. Thomas, VI )

Éditeur(s) : Division of Fish and Wildlife, Department of Planning and Natural Resources, United States Virgin Islands Division of Fish and Wildlife, Department of Planning and Natural Resources, United States Virgin Islands ( St. Thomas, VI )

Éditeur(s) : United States Virgin Islands. Department of Planning and Natural Resources. Division of Fish and Wildlife. United States Virgin Islands. Department of Planning and Natural Resources. Division of Fish and Wildlife.
North America -- United States Virgin Islands
Caribbean
Caribbean

Éditeur(s) : United States Virgin Islands. Department of Planning and Natural Resources. Division of Fish and Wildlife. United States Virgin Islands. Department of Planning and Natural Resources. Division of Fish and Wildlife.
North America -- United States Virgin Islands
Caribbean
Caribbean

Éditeur(s) : United States Virgin Islands. Department of Planning and Natural Resources. Division of Fish and Wildlife. United States Virgin Islands. Department of Planning and Natural Resources. Division of Fish and Wildlife.
North America -- United States Virgin Islands
Caribbean
Caribbean

Éditeur(s) : Division of Fish and Wildlife, Department of Planning and Natural Resources, United States Virgin Islands Division of Fish and Wildlife, Department of Planning and Natural Resources, United States Virgin Islands ( St. Thomas, VI )

Éditeur(s) : United States Virgin Islands. Department of Planning and Natural Resources. Division of Fish and Wildlife. United States Virgin Islands. Department of Planning and Natural Resources. Division of Fish and Wildlife.
North America -- United States Virgin Islands
Caribbean
Caribbean

Éditeur(s) : HAL CCSD American Association for the Advancement of Science
Résumé : The biodiversity-productivity relationship (BPR) is foundational to our understanding of the global extinction crisis and its impacts on ecosystem functioning. Understanding BPR is critical for the accurate valuation and effective conservation of biodiversity. Using ground-sourced data from 777,126 permanent plots, spanning 44 countries and most terrestrial biomes, we reveal a globally consistent positive concave-down BPR, showing that continued biodiversity loss would result in an accelerating decline in forest productivity worldwide. The value of biodiversity in maintaining commercial forest productivity alone-US$166 billion to 490 billion per year according to our estimation-is more than twice what it would cost to implement effective global conservation. This highlights the need for a worldwide reassessment of biodiversity values, forest management strategies, and conservation priorities.
ISSN: 0036-8075

hal-01607784
https://hal.archives-ouvertes.fr/hal-01607784
DOI : 10.1126/science.aaf8957
PRODINRA : 389856

Éditeur(s) : United States Virgin Islands. Department of Planning and Natural Resources. Division of Fish and Wildlife. United States Virgin Islands. Department of Planning and Natural Resources. Division of Fish and Wildlife.
North America -- United States Virgin Islands
Caribbean
Caribbean