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Plant mobility in the Mesozoic: Disseminule dispersal strategies of Chineseand Australian Middle Jurassic to Early Cretaceous plants
Swedish Museum of Natural History, Department of Paleobiology.ORCID iD: 0000-0001-6723-239X
LWL-Museum of Natural History, Münster, Germany.ORCID iD: 0000-0003-0933-8115
2019 (English)In: Palaeogeography, Palaeoclimatology, Palaeoecology, ISSN 0031-0182, E-ISSN 1872-616X, Vol. 515, p. 47-69Article in journal (Refereed) Published
Abstract [en]

Four upper Middle Jurassic to Lower Cretaceous lacustrine Lagerstätten in China and Australia (the Daohugou, Talbragar, Jehol, and Koonwarra biotas) offer glimpses into the representation of plant disseminule strategies during that phase of Earth history in which flowering plants, birds, mammals, and modern insect faunas began to diversify. No seed or foliage species is shared between the Northern and Southern Hemisphere fossil sites and only a few species are shared between the Jurassic and Cretaceous assemblages in the respective regions. Freesporing plants, including a broad range of bryophytes, are major components of the studied assemblages and attest to similar moist growth habitats adjacent to all four preservational sites. Both simple unadorned seeds and winged seeds constitute significant proportions of the disseminule diversity in each assemblage. Anemochory, evidenced by the development of seed wings or a pappus, remained a key seed dispersal strategy through the studied interval. Despite the rise of feathered birds and fur-covered mammals, evidence for epizoochory is minimal in the studied assemblages. Those Early Cretaceous seeds or detached reproductive structures bearing spines were probably adapted for anchoring to aquatic debris or to soft lacustrine substrates. Several relatively featureless seeds in all assemblages were potentially adapted to barochory or to endozoochory—the latter evidenced especially by the presence of smooth seeds in vertebrate gut contents and regurgitant or coprolitic masses. Hydrochory is inferred for several aquatic plants that notably bear small featureless seeds, particularly aggregated into detachable pods.

Place, publisher, year, edition, pages
Amsterdam: Elsevier, 2019. Vol. 515, p. 47-69
Keywords [en]
Seed dispersal, Zoochory, Anemochory, Hydrochory, Angiosperms, Conifers
National Category
Other Earth and Related Environmental Sciences
Research subject
Ecosystems and species history; Diversity of life; The changing Earth
Identifiers
URN: urn:nbn:se:nrm:diva-3424DOI: 10.1016/j.palaeo.2017.12.036OAI: oai:DiVA.org:nrm-3424DiVA, id: diva2:1372950
Funder
Swedish Research Council, 2014-5234Swedish Research Council, 2012-4375
Note

Funding also from the National Science Foundation project #1636625

Available from: 2019-07-01 Created: 2019-11-25Bibliographically approved

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Publisher's full texthttps://doi.org/10.1016/j.palaeo.2017.12.036

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