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  • 2005-2009  (9)
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Year
  • 1
    Online Resource
    Online Resource
    The role of genotype diversity within seagrass populations of the Baltic Sea (2007)
    Details Availability
    Keywords: Hochschulschrift
    Type of Medium: Online Resource
    Pages: Online-Ressource (PDF-Datei: 81 S., 6555 kB) , Ill., graph. Darst.
    URL: http://eldiss.uni-kiel.de/macau/receive/dissertation_diss_00002417
    URL: http://nbn-resolving.de/urn:nbn:de:gbv:8-diss-24176
    URL: http://d-nb.info/1019542098/34
    URN: urn:nbn:de:gbv:8-diss-24176
    Language: English
    Note: Kiel, Univ., Diss., 2007
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  • 2
    Online Resource
    Online Resource
    Importance of genetic diversity in eelgrass Zostera marina for its resilience to global warming (2008)
    Associated volumes
    Details Availability
    In: Marine ecology progress series, Oldendorf/Luhe : Inter-Research, 1979, 355(2008), Seite 1-7, 1616-1599
    In: volume:355
    In: year:2008
    In: pages:1-7
    Type of Medium: Online Resource
    ISSN: 1616-1599
    URL: http://dx.doi.org/doi:10.3354/meps07369
    DOI: 10.3354/meps07369
    Language: English
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  • 3
    Online Resource
    Online Resource
    Comparative analysis of Expressed Sequence Tag (EST) libraries in the seagrass Zostera marina subjected to temperature stress (2008)
    Associated volumes
    Details Availability
    In: Marine biotechnology, New York, NY : Springer, 1999, 1436-2228
    Description / Table of Contents: Global warming is associated with increasing stress and mortality on temperate seagrass beds, in particular during periods of high sea surface temperatures during summer months, adding to existing anthropogenic impacts, such as eutrophication and habitat destruction. We compare several expressed sequence tag (EST) in the ecologically important seagrass Zostera marina (eelgrass) to elucidate the molecular genetic basis of adaptation to environmental extremes. We compared the tentative unigene (TUG) frequencies of libraries derived from leaf and meristematic tissue from a control situation with two experimentally imposed temperature stress conditions and found that TUG composition is markedly different among these conditions (all P 〈 0.0001). Under heat stress, we find that 63 TUGs are differentially expressed (d.e.) at 25°C compared with lower, no-stress condition temperatures (4°C and 17°C). Approximately one-third of d.e. eelgrass genes were characteristic for the stress response of the terrestrial plant model Arabidopsis thaliana. The changes in gene expression suggest complex photosynthetic adjustments among light-harvesting complexes, reaction center subunits of photosystem I and II, and components of the dark reaction. Heat shock encoding proteins and reactive oxygen scavengers also were identified, but their overall frequency was too low to perform statistical tests. In all conditions, the most abundant transcript (3-15%) was a putative metallothionein gene with unknown function. We also find evidence that heat stress may translate to enhanced infection by protists. A total of 210 TUGs contain one or more microsatellites as potential candidates for gene-linked genetic markers. Data are publicly available in a user-friendly database at http://www.uni-muenster.de/Evolution/ebb/Services/zostera
    Type of Medium: Online Resource
    Pages: graph. Darst
    ISSN: 1436-2228
    DOI: 10.1007/s10126-007-9065-6
    Language: English
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  • 4
    Online Resource
    Online Resource
    Characterization of single nucleotide polymorphism markers for eelgrass (Zostera marina) (2008)
    Associated volumes
    Details Availability
    In: Molecular ecology resources, Oxford : Blackwell Science, 2008, 8(2008), 6, Seite 1429-1435, 1755-098X
    In: volume:8
    In: year:2008
    In: number:6
    In: pages:1429-1435
    Description / Table of Contents: We characterized 37 single nucleotide polymorphism (SNP) makers for eelgrass Zostera marina. SNP markers were developed using existing EST (expressed sequence tag)-libraries to locate polymorphic loci and develop primers from the functional expressed genes that are deposited in The ZOSTERA database (V1.2.1). SNP loci were genotyped using a single-base-extension approach which facilitated high-throughput genotyping with minimal optimization time. These markers show a wide range of variability among 25 eelgrass populations and will be useful for population genetic studies including evaluation of population structure, historical demography, and phylogeography. Potential applications include haplotype inference of physically linked SNPs and identification of genes under selection for temperature and desiccation stress.
    Type of Medium: Online Resource
    ISSN: 1755-098X
    DOI: 10.1111/j.1755-0998.2008.02251.x
    Language: English
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  • 5
    Online Resource
    Online Resource
    Partitioning average competition and extreme-genotype effects in genetically diverse infections (2008)
    Associated volumes
    Details Availability
    In: Oikos, Oxford : Blackwell, 1949, 117(2008), Seite 399-405, 0030-1299
    In: volume:117
    In: year:2008
    In: pages:399-405
    Description / Table of Contents: Competition between parasite genotypes in genetically diverse infections is widespread. However, experimental evidence on how genetic diversity influences total parasite load is variable. Here we use an additive partition equation to quantify the negative effect of inter-genotypic competition on total parasite load in diverse infections. Our approach controls for extreme-genotype effects, a process that can potentially neutralise, or even reverse, the negative effect of competition on total parasite load. A single extreme-genotype can have a disproportionate effect on total parasite load if it causes the highest parasite load in its single-infection, while increasing its performance in diverse relative to single infections. We show that in theory such disproportionate effects of extreme-genotypes can lead to a higher total parasite load in diverse infections than expected, even if competition reduces individual parasite performance on average. Controlling for the extreme-genotype effect is only possible if the competition effect on total parasite load is measured appropriately as the average difference between the realised number of each parasite genotype in mixed infections and the expected number based on single infection parasite loads. We apply this approach to sticklebacks that were experimentally infected with different trematode genotypes. On average, genetically diverse infections had lower parasite loads than expected from single-infection results. For the first time we demonstrate that competition between co-infecting genotypes per se caused the parasite load reduction, while extreme-genotype effects were not significant. We thus suggest that to correctly quantify the effect of competition alone on total parasite load in genetically diverse infections, the extreme-genotype effect has to be controlled for.
    Type of Medium: Online Resource
    Pages: graph. Darst
    ISSN: 0030-1299
    DOI: 10.1111/j.2007.0030-1299.16301.x
    Language: English
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  • 6
    Online Resource
    Online Resource
    Lifetime reproductive success is maximized with optimal major histocompatibility complex diversity (2008)
    Associated volumes
    Details Availability
    In: Royal Society (London), Proceedings of the Royal Society of London. Series B, Biological sciences, London : The Royal Society, 1905, (2008), 1471-2954
    In: year:2008
    In: extent:12
    Description / Table of Contents: Individual diversity at the major histocompatibility complex (MHC) is predicted to be optimal at intermediate rather than at maximal levels. We showed previously in sticklebacks that an intermediate MHC diversity is predominant in natural populations and provides maximal resistance in experimental multiple parasite infections in the laboratory. However, what counts ultimately is the lifetime reproductive success (LRS). Here, we measured LRS of six laboratory-bred sib-groupsto minimize the influence of non-MHC genesthree-spined sticklebacks (Gasterosteus aculeatus) during their entire breeding period, each in a seminatural enclosure in the lake of their parents, where they were exposed to the natural spectrum of parasites. We collected developing clutches at regular intervals and determined parenthood for a representative number of eggs (2279 in total) per clutch with 18 microsatellites. Both males and females with an intermediate MHC class IIB variant number had the highest LRS. The mechanistic link of MHC diversity and LRS differed between the sexes: in females, we found evidence for a trade-off between number of eggs and immunocompentence, whereas in males this correlation was concealed by different timing strategies of reproduction.
    Type of Medium: Online Resource
    Pages: 12 , graph. Darst.
    ISSN: 1471-2954
    DOI: 10.1098/rspb.2008.1466
    Language: English
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  • 7
    Online Resource
    Online Resource
    Mortality selection during the 2003 European heat wave in three-spined sticklebacks: effects of parasites and MHC genotype (2008)
    Associated volumes
    Details Availability
    In: BMC evolutionary biology, London : BioMed Central, 2001, 8(2008), 1471-2148
    In: volume:8
    In: year:2008
    In: extent:12
    Type of Medium: Online Resource
    Pages: 12 , graph. Darst
    ISSN: 1471-2148
    DOI: 10.1186/1471-2148-8-124
    Language: English
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  • 8
    Online Resource
    Online Resource
    Comment on "Phytoplankton Calcification in a High-CO2 World" (2008)
    Associated volumes
    Details Availability
    In: Science, Washington, DC : American Association for the Advancement of Science, 1880, 322(2008), 5907, Seite 1466, 1095-9203
    In: volume:322
    In: year:2008
    In: number:5907
    In: pages:1466
    Type of Medium: Online Resource
    Pages: graph. Darst
    ISSN: 1095-9203
    DOI: 10.1126/science.1161096
    Language: English
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  • 9
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    Comparative Analysis of Expressed Sequence Tag (EST) Libraries in the Seagrass Zostera marina Subjected to Temperature Stress (2008)
    Springer
    In:  Marine Biotechnology, 10 (3).
    Details
    Publication Date: 2017-10-10
    Description: Global warming is associated with increasing stress and mortality on temperate seagrass beds, in particular during periods of high sea surface temperatures during summer months, adding to existing anthropogenic impacts, such as eutrophication and habitat destruction. We compare several expressed sequence tag (EST) in the ecologically important seagrass Zostera marina (eelgrass) to elucidate the molecular genetic basis of adaptation to environmental extremes. We compared the tentative unigene (TUG) frequencies of libraries derived from leaf and meristematic tissue from a control situation with two experimentally imposed temperature stress conditions and found that TUG composition is markedly different among these conditions (all P 〈 0.0001). Under heat stress, we find that 63 TUGs are differentially expressed (d.e.) at 25°C compared with lower, no-stress condition temperatures (4°C and 17°C). Approximately one-third of d.e. eelgrass genes were characteristic for the stress response of the terrestrial plant model Arabidopsis thaliana. The changes in gene expression suggest complex photosynthetic adjustments among light-harvesting complexes, reaction center subunits of photosystem I and II, and components of the dark reaction. Heat shock encoding proteins and reactive oxygen scavengers also were identified, but their overall frequency was too low to perform statistical tests. In all conditions, the most abundant transcript (3–15%) was a putative metallothionein gene with unknown function. We also find evidence that heat stress may translate to enhanced infection by protists. A total of 210 TUGs contain one or more microsatellites as potential candidates for gene-linked genetic markers. Data are publicly available in a user-friendly database at http://www.uni-muenster.de/Evolution/ebb/Services/zostera.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1007/s10126-007-9065-6
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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