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@ARTICLE{Hamm:28257,
author = {Hamm, H. W. and Merkel, R. and Springer, O. and Jurkojc, P.
and Maier, C. and Prechtel, K. and Smetacek, V.},
title = {{A}rchitecture and material properties of diatom shells
provide effective mechanical protection},
journal = {Nature},
volume = {421},
issn = {0028-0836},
address = {London [u.a.]},
publisher = {Nature Publising Group},
reportid = {PreJuSER-28257},
pages = {841 - 843},
year = {2003},
note = {Record converted from VDB: 12.11.2012},
abstract = {Diatoms are the major contributors to phytoplankton blooms
in lakes and in the sea and hence are central in aquatic
ecosystems and the global carbon cycle. All free-living
diatoms differ from other phytoplankton groups in having
silicified cell walls in the form of two 'shells' (the
frustule) of manifold shape and intricate architecture whose
function and role, if any, in contributing to the
evolutionary success of diatoms is under debate. We explored
the defence potential of the frustules as armour against
predators by measuring their strength. Real and virtual
loading tests (using calibrated glass microneedles and
finite element analysis) were performed on centric and
pennate diatom cells. Here we show that the frustules are
remarkably strong by virtue of their architecture and the
material properties of the diatom silica. We conclude that
diatom frustules have evolved as mechanical protection for
the cells because exceptional force is required to break
them. The evolutionary arms race between diatoms and their
specialized predators will have had considerable influence
in structuring pelagic food webs and biogeochemical cycles.},
keywords = {Animals / Biomechanics / Calibration / Carbon: analysis /
Cell Wall: chemistry / Cell Wall: physiology / Diatoms:
chemistry / Diatoms: classification / Diatoms: cytology /
Diatoms: physiology / Food Chain / Glass / Needles /
Phytoplankton: chemistry / Phytoplankton: classification /
Phytoplankton: cytology / Phytoplankton: physiology /
Silicon Dioxide / Species Specificity / Carbon (NLM
Chemicals) / Silicon Dioxide (NLM Chemicals) / J (WoSType)},
cin = {ISG-4},
ddc = {070},
cid = {I:(DE-Juel1)VDB44},
pnm = {Kondensierte Materie},
pid = {G:(DE-Juel1)FUEK242},
shelfmark = {Multidisciplinary Sciences},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:12594512},
UT = {WOS:000181044700047},
doi = {10.1038/nature01416},
url = {https://juser.fz-juelich.de/record/28257},
}