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Search: WFRF:(Timm R.)

  • Result 1-10 of 41
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1.
  • Aad, G., et al. (author)
  • 2010
  • swepub:Mat__t
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2.
  • 2019
  • Journal article (peer-reviewed)
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3.
  • Appeltans, W., et al. (author)
  • The Magnitude of Global Marine Species Diversity
  • 2012
  • In: Current Biology. - : Elsevier BV. - 0960-9822 .- 1879-0445. ; 22:23, s. 2189-2202
  • Journal article (peer-reviewed)abstract
    • Background: The question of how many marine species exist is important because it provides a metric for how much we do and do not know about life in the oceans. We have compiled the first register of the marine species of the world and used this baseline to estimate how many more species, partitioned among all major eukaryotic groups, may be discovered. Results: There are similar to 226,000 eukaryotic marine species described. More species were described in the past decade (similar to 20,000) than in any previous one. The number of authors describing new species has been increasing at a faster rate than the number of new species described in the past six decades. We report that there are similar to 170,000 synonyms, that 58,000-72,000 species are collected but not yet described, and that 482,000-741,000 more species have yet to be sampled. Molecular methods may add tens of thousands of cryptic species. Thus, there may be 0.7-1.0 million marine species. Past rates of description of new species indicate there may be 0.5 +/- 0.2 million marine species. On average 37% (median 31%) of species in over 100 recent field studies around the world might be new to science. Conclusions: Currently, between one-third and two-thirds of marine species may be undescribed, and previous estimates of there being well over one million marine species appear highly unlikely. More species than ever before are being described annually by an increasing number of authors. If the current trend continues, most species will be discovered this century.
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6.
  • Abrego, Nerea, et al. (author)
  • Airborne DNA reveals predictable spatial and seasonal dynamics of fungi
  • 2024
  • In: Nature. - 0028-0836 .- 1476-4687. ; 631, s. 835-842
  • Journal article (peer-reviewed)abstract
    • Fungi are among the most diverse and ecologically important kingdoms in life. However, the distributional ranges of fungi remain largely unknown as do the ecological mechanisms that shape their distributions1,2. To provide an integrated view of the spatial and seasonal dynamics of fungi, we implemented a globally distributed standardized aerial sampling of fungal spores3. The vast majority of operational taxonomic units were detected within only one climatic zone, and the spatiotemporal patterns of species richness and community composition were mostly explained by annual mean air temperature. Tropical regions hosted the highest fungal diversity except for lichenized, ericoid mycorrhizal and ectomycorrhizal fungi, which reached their peak diversity in temperate regions. The sensitivity in climatic responses was associated with phylogenetic relatedness, suggesting that large-scale distributions of some fungal groups are partially constrained by their ancestral niche. There was a strong phylogenetic signal in seasonal sensitivity, suggesting that some groups of fungi have retained their ancestral trait of sporulating for only a short period. Overall, our results show that the hyperdiverse kingdom of fungi follows globally highly predictable spatial and temporal dynamics, with seasonality in both species richness and community composition increasing with latitude. Our study reports patterns resembling those described for other major groups of organisms, thus making a major contribution to the long-standing debate on whether organisms with a microbial lifestyle follow the global biodiversity paradigms known for macroorganisms4,5.
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7.
  • Ovaskainen, Otso, et al. (author)
  • Global Spore Sampling Project: A global, standardized dataset of airborne fungal DNA
  • 2024
  • In: Scientific Data. - 2052-4463. ; 11
  • Journal article (peer-reviewed)abstract
    • Novel methods for sampling and characterizing biodiversity hold great promise for re-evaluating patterns of life across the planet. The sampling of airborne spores with a cyclone sampler, and the sequencing of their DNA, have been suggested as an efficient and well-calibrated tool for surveying fungal diversity across various environments. Here we present data originating from the Global Spore Sampling Project, comprising 2,768 samples collected during two years at 47 outdoor locations across the world. Each sample represents fungal DNA extracted from 24 m3 of air. We applied a conservative bioinformatics pipeline that filtered out sequences that did not show strong evidence of representing a fungal species. The pipeline yielded 27,954 species-level operational taxonomic units (OTUs). Each OTU is accompanied by a probabilistic taxonomic classification, validated through comparison with expert evaluations. To examine the potential of the data for ecological analyses, we partitioned the variation in species distributions into spatial and seasonal components, showing a strong effect of the annual mean temperature on community composition.
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9.
  • Betti, Marco, et al. (author)
  • Manipulating photorespiration to increase plant productivity : recent advances and perspectives for crop improvement
  • 2016
  • In: Journal of Experimental Botany. - : Oxford University Press (OUP). - 0022-0957 .- 1460-2431. ; 67:10, s. 2977-2988
  • Research review (peer-reviewed)abstract
    • Recycling of the 2-phosphoglycolate generated by the oxygenase reaction of Rubisco requires a complex and energy-consuming set of reactions collectively known as the photorespiratory cycle. Several approaches aimed at reducing the rates of photorespiratory energy or carbon loss have been proposed, based either on screening for natural variation or by means of genetic engineering. Recent work indicates that plant yield can be substantially improved by the alteration of photorespiratory fluxes or by engineering artificial bypasses to photorespiration. However, there is also evidence indicating that, under certain environmental and/or nutritional conditions, reduced photorespiratory capacity may be detrimental to plant performance. Here we summarize recent advances obtained in photorespiratory engineering and discuss prospects for these advances to be transferred to major crops to help address the globally increasing demand for food and biomass production.
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10.
  • Fernie, A. R., et al. (author)
  • Perspectives on plant photorespiratory metabolism
  • 2013
  • In: Plant Biology. - : Wiley-Blackwell. - 1435-8603 .- 1438-8677. ; 15:4, s. 748-753
  • Research review (peer-reviewed)abstract
    • Being intimately intertwined with (C3) photosynthesis, photorespiration is an incredibly high flux-bearing pathway. Traditionally, the photorespiratory cycle was viewed as closed pathway to refill the Calvin-Benson cycle with organic carbon. However, given the network nature of metabolism, it hence follows that photorespiration will interact with many other pathways. In this article, we review current understanding of these interactions and attempt to define key priorities for future research, which will allow us greater fundamental comprehension of general metabolic and developmental consequences of perturbation of this crucial metabolic process.
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  • Result 1-10 of 41
Type of publication
journal article (36)
conference paper (2)
research review (2)
Type of content
peer-reviewed (38)
other academic/artistic (2)
Author/Editor
Janson, Christer (5)
Mikkelsen, A. (2)
Lowe, A. J. (2)
Nielsen, J. (2)
Steinberg, S (2)
Agartz, I (2)
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Andreassen, OA (2)
Melle, I (2)
Djurovic, S (2)
Nilsson, R. Henrik, ... (2)
Somervuo, Panu (2)
Abrego, Nerea (2)
Tedersoo, Leho (2)
Mortensen, PB (2)
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Rujescu, D (2)
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de Vere, Natasha (2)
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Grudd, Håkan (2)
Halme, Panu (2)
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University
Lund University (15)
University of Gothenburg (12)
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Karolinska Institutet (6)
Chalmers University of Technology (3)
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Stockholm University (2)
Linköping University (2)
Karlstad University (2)
Royal Institute of Technology (1)
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Language
English (41)
Research subject (UKÄ/SCB)
Natural sciences (28)
Medical and Health Sciences (12)
Engineering and Technology (7)

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