Christopher Lambert results 38
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Validation of satellite-derived essential climate variable (ECV) datasets requires comparison against independent measurements. These independent measurements, which include ground-based, airborne, and other non-satellite-based measurements, are typically the product of a different measurement system and may include some contribution from models. These reference data therefore have their own characteristics, uncertainties, and...
This study deals with the elucidation of the life cycle of an inoperculate discomycete that was eventually collected from conifer wood in South Germany and has become famous for the extraordinary diversity of its secondary metabolites when it was studied extensively during the 1990s. It had then been identified as Lachnum papyraceum ( Lachnaceae , Helotiales ) based on morphological traits, and extracts from its mycelial cultu...
Unraveling intragenomic polymorphisms in the high-quality genome of Hypoxylaceae: a comprehensive study of the rDNA cistronNARA Subscribed
Sequencing ribosomal DNA loci, such as ITS and LSU, are among the first steps to characterize and identify newly isolated fungal strains. Substantial doubt has recently been raised concerning the unequivocal suitability of using this sequence information for inferring inter- and intraspecific relationships, as especially the ITS locus was repeatedly shown to harbor high intragenomic plasticity. The evolutionary mechanisms lead...
Projections of West African Monsoon (WAM) precipitation are uncertain. To address this, an improved understanding of the mechanisms driving WAM precipitation change is needed to shed light on inter-model differences and aid model development. The full forcing of increased CO 2 can be decomposed into different components such as the impact of ocean warming, or the direct radiative effect of increased CO 2 . This paper investiga...
Studies on Argentine Phylacia species (Hypoxylaceae) using a polythetic taxonomic approachNARA Subscribed
The current study is dedicated to the taxonomy of the genus Phylacia ( Hypoxylaceae ) in Argentina. Fieldwork in the north of the country provided several fresh collections that were studied, using a polyphasic approach. The secondary metabolite profiles of the specimens were generated by high-performance liquid chromatography hyphenated by diode array and mass spectrometry (HPLC–DAD/MS) of the stromata. This study confirmed t...
Studies on the secondary metabolism of Rosellinia and Dematophora strains (Xylariaceae) from IranNARA Subscribed
The xylariaceous genus Dematophora has recently been resurrected and segregated from Rosellinia based on a molecular phylogeny and morphological characters. This was an important taxonomic change because Dematophora in the current sense contains several important pathogens, while Rosellinia is limited to mainly saprotrophic species that have an endophytic stage in their life cycle and may even have beneficial effects on the ho...
Prioritizing river basins for intensive monitoring and assessment by the US Geological SurveyNARA Subscribed
The US Geological Survey (USGS) is currently (2020) integrating its water science programs to better address the nation’s greatest water resource challenges now and into the future. This integration will rely, in part, on data from 10 or more intensively monitored river basins from across the USA. A team of USGS scientists was convened to develop a systematic, quantitative approach to prioritize candidate basins for this monit...
An increasing number of people are spending time in Polar Regions for work and tourism and this can increase the risk of tissue injuries, e.g. frostbite. The risk would be reduced if beneficial peripheral blood flow adaptions occurred but data regarding the trainability of the cold-induced vasodilation (CIVD) response are equivocal. Five healthy males spent almost 8 months in Antarctica; five of them at a semi-permanent camp (...
Intragenomic polymorphisms in the ITS region of high-quality genomes of the Hypoxylaceae (Xylariales, Ascomycota)NARA Subscribed
The internal transcribed spacer (ITS) region of the ribosomal DNA (rDNA) has been established (and is generally accepted) as a primary “universal” genetic barcode for fungi for many years, but the actual value for taxonomy has been heavily disputed among mycologists. Recently, twelve draft genome sequences, mainly derived from type species of the family Hypoxylaceae (Xylariales, Ascomycota) and the ex-epitype strain of Xylaria...