SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "WFRF:(Reich David) "

Sökning: WFRF:(Reich David)

  • Resultat 1-10 av 35
  • [1]234Nästa
Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
1.
  • Kattge, Jens, et al. (författare)
  • TRY plant trait database - enhanced coverage and open access
  • 2020
  • Ingår i: Global Change Biology. - : Wiley-Blackwell. - 1354-1013 .- 1365-2486. ; 26:1, s. 119-188
  • Tidskriftsartikel (refereegranskat)abstract
    • Plant traits-the morphological, anatomical, physiological, biochemical and phenological characteristics of plants-determine how plants respond to environmental factors, affect other trophic levels, and influence ecosystem properties and their benefits and detriments to people. Plant trait data thus represent the basis for a vast area of research spanning from evolutionary biology, community and functional ecology, to biodiversity conservation, ecosystem and landscape management, restoration, biogeography and earth system modelling. Since its foundation in 2007, the TRY database of plant traits has grown continuously. It now provides unprecedented data coverage under an open access data policy and is the main plant trait database used by the research community worldwide. Increasingly, the TRY database also supports new frontiers of trait-based plant research, including the identification of data gaps and the subsequent mobilization or measurement of new data. To support this development, in this article we evaluate the extent of the trait data compiled in TRY and analyse emerging patterns of data coverage and representativeness. Best species coverage is achieved for categorical traits-almost complete coverage for 'plant growth form'. However, most traits relevant for ecology and vegetation modelling are characterized by continuous intraspecific variation and trait-environmental relationships. These traits have to be measured on individual plants in their respective environment. Despite unprecedented data coverage, we observe a humbling lack of completeness and representativeness of these continuous traits in many aspects. We, therefore, conclude that reducing data gaps and biases in the TRY database remains a key challenge and requires a coordinated approach to data mobilization and trait measurements. This can only be achieved in collaboration with other initiatives.
  •  
2.
  • Kumarathunge, Dushan P., et al. (författare)
  • Acclimation and adaptation components of the temperature dependence of plant photosynthesis at the global scale
  • 2019
  • Ingår i: New Phytologist. - : John Wiley & Sons. - 0028-646X .- 1469-8137. ; 222:2, s. 768-784
  • Tidskriftsartikel (refereegranskat)abstract
    • The temperature response of photosynthesis is one of the key factors determining predicted responses to warming in global vegetation models (GVMs). The response may vary geographically, owing to genetic adaptation to climate, and temporally, as a result of acclimation to changes in ambient temperature. Our goal was to develop a robust quantitative global model representing acclimation and adaptation of photosynthetic temperature responses.We quantified and modelled key mechanisms responsible for photosynthetic temperature acclimation and adaptation using a global dataset of photosynthetic CO2 response curves, including data from 141 C3 species from tropical rainforest to Arctic tundra. We separated temperature acclimation and adaptation processes by considering seasonal and common-garden datasets, respectively.The observed global variation in the temperature optimum of photosynthesis was primarily explained by biochemical limitations to photosynthesis, rather than stomatal conductance or respiration. We found acclimation to growth temperature to be a stronger driver of this variation than adaptation to temperature at climate of origin.We developed a summary model to represent photosynthetic temperature responses and showed that it predicted the observed global variation in optimal temperatures with high accuracy. This novel algorithm should enable improved prediction of the function of global ecosystems in a warming climate.
  •  
3.
  • Lazaridis, Iosif, et al. (författare)
  • Ancient human genomes suggest three ancestral populations for present-day Europeans
  • 2014
  • Ingår i: Nature. - 0028-0836 .- 1476-4687. ; 513:7518, s. 409-
  • Tidskriftsartikel (refereegranskat)abstract
    • We sequenced the genomes of a similar to 7,000-year-old farmer from Germany and eight similar to 8,000-year-old hunter-gatherers from Luxembourg and Sweden. We analysed these and other ancient genomes(1-4) with 2,345 contemporary humans to show that most present-day Europeans derive from at least three highly differentiated populations: west European hunter-gatherers, who contributed ancestry to all Europeans but not to Near Easterners; ancient north Eurasians related to Upper Palaeolithic Siberians(3), who contributed to both Europeans and Near Easterners; and early European farmers, who were mainly of Near Eastern origin but also harboured west European hunter-gatherer related ancestry. We model these populations' deep relationships and show that early European farmers had similar to 44% ancestry from a 'basal Eurasian' population that split before the diversification of other non-African lineages.
  •  
4.
  • Mikkelsen, Tarjei, et al. (författare)
  • Initial sequence of the chimpanzee genome and comparison with the human genome
  • 2005
  • Ingår i: Nature. - 0028-0836 .- 1476-4687. ; 437:7055, s. 69-87
  • Tidskriftsartikel (refereegranskat)abstract
    • Here we present a draft genome sequence of the common chimpanzee (Pan troglodytes). Through comparison with the human genome, we have generated a largely complete catalogue of the genetic differences that have accumulated since the human and chimpanzee species diverged from our common ancestor, constituting approximately thirty-five million single-nucleotide changes, five million insertion/deletion events, and various chromosomal rearrangements. We use this catalogue to explore the magnitude and regional variation of mutational forces shaping these two genomes, and the strength of positive and negative selection acting on their genes. In particular, we find that the patterns of evolution in human and chimpanzee protein-coding genes are highly correlated and dominated by the fixation of neutral and slightly deleterious alleles. We also use the chimpanzee genome as an outgroup to investigate human population genetics and identify signatures of selective sweeps in recent human evolution.
  •  
5.
  • Palkopoulou, Eleftheria, et al. (författare)
  • A comprehensive genomic history of extinct and living elephants
  • 2018
  • Ingår i: Proceedings of the National Academy of Sciences of the United States of America. - : NATL ACAD SCIENCES. - 0027-8424 .- 1091-6490. ; 115:11, s. E2566-E2574
  • Tidskriftsartikel (refereegranskat)abstract
    • Elephantids are the world's most iconic megafaunal family, yet there is no comprehensive genomic assessment of their relationships. We report a total of 14 genomes, including 2 from the American mastodon, which is an extinct elephantid relative, and 12 spanning all three extant and three extinct elephantid species including an similar to 120,000-y-old straight-tusked elephant, a Columbian mammoth, and woolly mammoths. Earlier genetic studies modeled elephantid evolution via simple bifurcating trees, but here we show that interspecies hybridization has been a recurrent feature of elephantid evolution. We found that the genetic makeup of the straight-tusked elephant, previously placed as a sister group to African forest elephants based on lower coverage data, in fact comprises three major components. Most of the straight-tusked elephant's ancestry derives from a lineage related to the ancestor of African elephants while its remaining ancestry consists of a large contribution from a lineage related to forest elephants and another related to mammoths. Columbian and woolly mammoths also showed evidence of interbreeding, likely following a latitudinal cline across North America. While hybridization events have shaped elephantid history in profound ways, isolation also appears to have played an important role. Our data reveal nearly complete isolation between the ancestors of the African forest and savanna elephants for similar to 500,000 y, providing compelling justification for the conservation of forest and savanna elephants as separate species.
  •  
6.
  • Sarwar, Nadeem, et al. (författare)
  • Interleukin-6 receptor pathways in coronary heart disease: a collaborative meta-analysis of 82 studies
  • 2012
  • Ingår i: The Lancet. - New York, NY, USA : Elsevier. - 1474-547X .- 0140-6736. ; 379:9822, s. 1205-1213
  • Tidskriftsartikel (refereegranskat)abstract
    • Background Persistent inflammation has been proposed to contribute to various stages in the pathogenesis of cardiovascular disease. Interleukin-6 receptor (IL6R) signalling propagates downstream inflammation cascades. To assess whether this pathway is causally relevant to coronary heart disease, we studied a functional genetic variant known to affect IL6R signalling. Methods In a collaborative meta-analysis, we studied Asp358Ala (rs2228145) in IL6R in relation to a panel of conventional risk factors and inflammation biomarkers in 125 222 participants. We also compared the frequency of Asp358Ala in 51 441 patients with coronary heart disease and in 136 226 controls. To gain insight into possible mechanisms, we assessed Asp358Ala in relation to localised gene expression and to postlipopolysaccharide stimulation of interleukin 6. Findings The minor allele frequency of Asp358Ala was 39%. Asp358Ala was not associated with lipid concentrations, blood pressure, adiposity, dysglycaemia, or smoking (p value for association per minor allele >= 0.04 for each). By contrast, for every copy of 358Ala inherited, mean concentration of IL6R increased by 34.3% (95% CI 30.4-38.2) and of interleukin 6 by 14.6% (10.7-18.4), and mean concentration of C-reactive protein was reduced by 7.5% (5.9-9.1) and of fibrinogen by 1.0% (0.7-1.3). For every copy of 358Ala inherited, risk of coronary heart disease was reduced by 3.4% (1.8-5.0). Asp358Ala was not related to IL6R mRNA levels or interleukin-6 production in monocytes. Interpretation Large-scale human genetic and biomarker data are consistent with a causal association between IL6R-related pathways and coronary heart disease.
  •  
7.
  • Aad, G., et al. (författare)
  • Measurement of the top pair production cross section in 8 TeV proton-proton collisions using kinematic information in the lepton plus jets final state with ATLAS
  • 2015
  • Ingår i: Physical Review D (Particles, Fields, Gravitation and Cosmology). - : American Physical Society. - 1550-2368 .- 1550-7998. ; 91:11
  • Tidskriftsartikel (refereegranskat)abstract
    • A measurement is presented of the (tt) over bar inclusive production cross section in pp collisions at a center-ofmass energy of pffisffiffi root s = 8 TeV using data collected by the ATLAS detector at the CERN Large Hadron Collider. The measurement was performed in the lepton + jets final state using a data set corresponding to an integrated luminosity of 20.3 fb(-1). The cross section was obtained using a likelihood discriminant fit and b-jet identification was used to improve the signal-to-background ratio. The inclusive (tt) over bar production cross section was measured to be 260 +/- 1(stat)(-23)(+22)(stat) +/- 8(lumi) +/- 4(beam) pb assuming a top-quark mass of 172.5 GeV, in good agreement with the theoretical prediction of 253(-15)(+13) pb. The (tt) over bar -> (e, mu) + jets production cross section in the fiducial region determined by the detector acceptance is also reported.
  •  
8.
  • Barty, A., et al. (författare)
  • Self-terminating diffraction gates femtosecond X-ray nanocrystallography measurements
  • 2012
  • Ingår i: Nature Photonics. - 1749-4885 .- 1749-4893. ; 6:1
  • Tidskriftsartikel (refereegranskat)abstract
    • X-ray free-electron lasers have enabled new approaches to the structural determination of protein crystals that are too small or radiation-sensitive for conventional analysis1. For sufficiently short pulses, diffraction is collected before significant changes occur to the sample, and it has been predicted that pulses as short as 10 fs may be required to acquire atomic-resolution structural information1, 2, 3, 4. Here, we describe a mechanism unique to ultrafast, ultra-intense X-ray experiments that allows structural information to be collected from crystalline samples using high radiation doses without the requirement for the pulse to terminate before the onset of sample damage. Instead, the diffracted X-rays are gated by a rapid loss of crystalline periodicity, producing apparent pulse lengths significantly shorter than the duration of the incident pulse. The shortest apparent pulse lengths occur at the highest resolution, and our measurements indicate that current X-ray free-electron laser technology5 should enable structural determination from submicrometre protein crystals with atomic resolution.
  •  
9.
  • Haak, Wolfgang, et al. (författare)
  • Massive migration from the steppe was a source for Indo-European languages in Europe
  • 2015
  • Ingår i: Nature. - 0028-0836 .- 1476-4687. ; 522:7555, s. 207-
  • Tidskriftsartikel (refereegranskat)abstract
    • We generated genome-wide data from 69 Europeans who lived between 8,000-3,000 years ago by enriching ancient DNA libraries for a target set of almost 400,000 polymorphisms. Enrichment of these positions decreases the sequencing required for genome-wide ancient DNA analysis by a median of around 250-fold, allowing us to study an order of magnitude more individuals than previous studies(1-8) and to obtain new insights about the past. We show that the populations of Western and Far Eastern Europe followed opposite trajectories between 8,000-5,000 years ago. At the beginning of the Neolithic period in Europe, similar to 8,000-7,000 years ago, closely related groups of early farmers appeared in Germany, Hungary and Spain, different from indigenous hunter-gatherers, whereas Russia was inhabited by a distinctive population of hunter-gatherers with high affinity to a similar to 24,000-year-old Siberian(6). By similar to 6,000-5,000 years ago, farmers throughout much of Europe had more hunter-gatherer ancestry than their predecessors, but in Russia, the Yamnaya steppe herders of this time were descended not only from the preceding eastern European hunter-gatherers, but also from a population of Near Eastern ancestry. Western and Eastern Europe came into contact similar to 4,500 years ago, as the Late Neolithic Corded Ware people from Germany traced similar to 75% of their ancestry to the Yamnaya, documenting a massive migration into the heartland of Europe from its eastern periphery. This steppe ancestry persisted in all sampled central Europeans until at least similar to 3,000 years ago, and is ubiquitous in present-day Europeans. These results provide support for a steppe origin(9) of at least some of the Indo-European languages of Europe.
  •  
10.
  •  
Skapa referenser, mejla, bekava och länka
  • Resultat 1-10 av 35
  • [1]234Nästa
Typ av publikation
tidskriftsartikel (31)
forskningsöversikt (2)
annan publikation (1)
konferensbidrag (1)
Typ av innehåll
refereegranskat (34)
övrigt vetenskapligt (1)
Författare/redaktör
Reich, Peter B (6)
Nowak, S. (5)
Reich, M. (5)
Diaz, Sandra (5)
Gorini, G (4)
Bernert, M (4)
visa fler...
Bolzonella, T (4)
Czarnecka, A (4)
Douai, D (4)
Eich, T (4)
Frassinetti, L (4)
Kappatou, A (4)
Kurki-Suonio, Taina, ... (4)
Mantica, P (4)
Mazon, D (4)
Nocente, M (4)
Piovesan, P (4)
Putterich, T (4)
Saarelma, S (4)
Salewski, M (4)
Salmi, A (4)
Sauter, O (4)
Sozzi, C (4)
Tala, T (4)
Valisa, M (4)
Wischmeier, M (4)
Zagorski, R (4)
Frassinetti, Lorenzo (4)
Carr, M (4)
Weiland, M (4)
Seibert, M. Marvin (4)
Bogan, Michael J. (4)
Dalen, Love (4)
Shoeman, Robert L (4)
Doak, R Bruce (4)
Martin, Andrew V. (4)
Chapman, Henry N. (4)
Maia, Filipe R. N. C ... (4)
Vianello, N. (4)
Hunter, Mark S. (4)
Kirian, Richard A. (4)
White, Thomas A. (4)
Bajt, Saša (4)
Bozek, John D. (4)
DePonte, Daniel P. (4)
Epp, Sascha W. (4)
Hampton, Christina Y ... (4)
Reich, Christian (4)
Spence, John C. H. (4)
Niinemets, Ulo (4)
visa färre...
Lärosäte
Göteborgs universitet (10)
Uppsala universitet (8)
Stockholms universitet (8)
Lunds universitet (8)
Chalmers tekniska högskola (5)
Kungliga Tekniska Högskolan (4)
visa fler...
Umeå universitet (3)
Naturhistoriska riksmuseet (2)
Jönköping University (1)
Linnéuniversitetet (1)
Karolinska Institutet (1)
Karlstads universitet (1)
Sveriges Lantbruksuniversitet (1)
visa färre...
Språk
Engelska (35)
Forskningsämne (UKÄ/SCB)
Naturvetenskap (22)
Humaniora (7)
Teknik (4)
Medicin och hälsovetenskap (4)
Lantbruksvetenskap (1)
Samhällsvetenskap (1)

År

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy