Fai clic su di un'immagine per andare a Google Ricerca Libri.
Sto caricando le informazioni... The Cambrian Explosion: The Construction of Animal Biodiversity (edizione 2013)di Erwin Douglas, Valentine James
Informazioni sull'operaThe Cambrian Explosion: The Construction of Animal Biodiversity di Douglas Erwin
Nessuno Sto caricando le informazioni...
Iscriviti per consentire a LibraryThing di scoprire se ti piacerà questo libro. Attualmente non vi sono conversazioni su questo libro. Excellent information, clear and concise. ( ) The book is aimed at graduate biology students, which means it in parts assumes background knowledge I lack, but also that it's reasonably pedagogical and doesn't assume the reader to be a fellow expert either. Dealing with the physical (marine) environment of the Cambrian and preceding times, animal phylogeny, developmental genetics, and palaeoecology, the book doesn't lend itself to summarization. But I may note a few conclusions the authors come down on: the explosion had a "long fuse", ie. clades originate in the Proterozoic, long before their diversification during the explosion; geochemical changes, esp. the oxygenation of the oceans, were both driving and driven by animal evolution; animal evolution operated under effectively somewhat different rules then than now, as developmental cascades hadn't solidified yet, or rather were just then solidifying; accordingly divergences then really were more abrupt than in later evolutionary history. Bits of the book were hard going, because as said they assumed background knowledge I didn't have - particularly regarding geochemistry -, but overall I liked it as an up-to-date perspective on the subject. Don't pick it up expecting a picture book of Cambrian critters however! There are some excellent illustrations included, but the emphasis is firmly on the text, and the authors tend to stay on a rather abstract level, discussing higher taxa, or types of genetic pathways, rather than individual species, specimens, or genes. nessuna recensione | aggiungi una recensione
"The Cambrian Period records one of the most extraordinary transitions in the history of life. Although animals may have first appeared nearly 700 million years ago, with the earliest sponges, their initial diversifications appear to have been modest until a richly diverse fossil fauna appeared relatively abruptly about 170 million years later. In The Cambrian Explosion, Erwin and Valentine synthesize research from many fields to explain why there was such remarkable novelty of animal forms"-- Non sono state trovate descrizioni di biblioteche |
Discussioni correntiNessuno
Google Books — Sto caricando le informazioni... GeneriSistema Decimale Melvil (DDC)560.1723Natural sciences and mathematics Fossils & prehistoric life PaleontologyClassificazione LCVotoMedia:
Sei tu?Diventa un autore di LibraryThing. |