Biota and palaeoenvironment of a high middle-latitude Late Triassic peat-forming ecosystem from Hopen, Svalbard archipelago
2016 (English)In: Geological Society, London, Special Publications, ISSN 0305-8719, Vol. 434, 87-112 p.Article in journal (Refereed) Published
A siliceous permineralized peat block recovered from Hopen in the Svalbard archipelago hosts a low-diversity Late Triassic flora dominated by autochthonous roots and stems of bennettitaleans and lycophytes, and parautochthonous leaves, sporangia, spores and pollen from a small range of pteridophytes and gymnosperms. Some parenchymatous bennettitalean root cells show interactions with chytrid fungi and bacteria; the remains of other fungi and fungi-like organisms are dispersed within the peat’s detrital matrix. Cavities excavated through some roots and compacted detritus contain abundant coprolites probably derived from sapro-xylophagous oribatid mites, although no body fossils have yet been identified. Sparse larger coprolites containing leaf fragments attest to the presence of invertebrate folivores in the ancient ecosystem. The low diversity flora, relatively few trophic levels and simple nutritional web, together with sedimentological aspects of the host formation and the peat structure, collectively favour accumulation of the organic mass as a fibric (root-dominated) peat within a temperate (high middle-latitude), well aerated mire.
Place, publisher, year, edition, pages
London, 2016. Vol. 434, 87-112 p.
Mesozoic; fungi; ferns; lycophytes; gymnosperms; Peronosporomycetes
Other Earth and Related Environmental Sciences
Research subject Ecosystems and species history; The changing Earth
IdentifiersURN: urn:nbn:se:nrm:diva-1897DOI: doi.org/10.1144/SP434.4OAI: oai:DiVA.org:nrm-1897DiVA: diva2:1046128
FunderSwedish Research Council, 2010-3931Swedish Research Council, 2014-5234EU, FP7, Seventh Framework Programme, SE-TAF 1868EU, FP7, Seventh Framework Programme, SE-TAF 3562