Podrobnosti záznamu

Název
    Palaeozoic plankton revolution: Evidence from early gastropod ontogeny
Autor
    Frýda, Jiří
    Nützel, A.
Jazyk
    anglicky
Typ dokumentu
    článek v periodiku
Zdrojový dokument - seriál
    Geology
Svazek/č.
    Roč. 31, č. 9
Strany
    3
Rok
    2003
Výraz tezauru
    Gastropoda, macroevolution, Paleozoic larval shells, plankton predation
Klíčové slovo
    Early
    Evidence
    Gastropod
    Ontogeny
    Palaeozoic
    Plankton
    Revolution
Abstrakt (anglicky)
   A major macroevolutionary trend in gastropod larval shell morphology occurred throughout the middle and late Paleozoic. The majority of Ordovician and Silurian gastropods have openly coiled initial whorls; this morphology was gradually lost. Mesozoic gastropods have exclusively tightly coiled initial whorls. Most protoconchs were formed by planktonic larvae, and this is the first documentation of a supraspecific trend in Paleozoic invertebrate larvae. The replacement of weak-shelled plankton by stronger-shelled plankton was probably caused by predatory, selective forces. It coincides with other fundamental changes in plankton communities during the middle and late Paleozoic, including the decline of acritarchs and graptolites. Plankton communities suffered from crises that were probably caused by extrinsic forces. During plankton restructuring in the aftermath, predation could have become an increasingly important selective factor for gastropod larvae.
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (RIV)
Zdrojový formát
    R
Datum importu
    15. 10. 2014