Genyornis (Genyornis newtoni) was a genus of large, flightless bird that lived in Australia until about 50,000 years ago. Many species became extinct in Australia around that time, coinciding with the arrival of humans. The conservation status of a species is an indicator of the likelihood of that species continuing to survive. ... Scientific classification or biological classification is how biologists group and categorize extinct and living species of organisms. ... Phyla Porifera (sponges) Ctenophora (comb jellies) Cnidaria Placozoa Bilateria Acoelomorpha Orthonectida Rhombozoa Myxozoa Superphylum Deuterostomia Chordata (vertebrates, etc. ... Typical Classes Subphylum Urochordata - Tunicates Ascidiacea Thaliacea Larvacea Subphylum Cephalochordata - Lancelets Subphylum Myxini - Hagfishes Subphylum Vertebrata - Vertebrates Petromyzontida - Lampreys Placodermi (extinct) Chondrichthyes - Cartilaginous fishes Acanthodii (extinct) Actinopterygii - Ray-finned fishes Actinistia - Coelacanths Dipnoi - Lungfishes Amphibia - Amphibians Reptilia - Reptiles Aves - Birds Mammalia - Mammals Chordates (phylum Chordata) include the vertebrates, together with... Orders Many - see section below. ... In biology, binomial nomenclature is a standard convention used for naming species. ... See genus (mathematics) for the use of the term in mathematics. ... Orders Many - see section below. ... In biology, a species is a kind of organism. ... In biology and ecology, extinction is the ceasing of existence of a species or group of species. ...
A study has been performed1 where more than 700 Genyornis eggshell fragments were dated. Through this means, it was determined that Genyornis declined and became extinct over a short period of time -- too short for it to be plausibly explained by climate change. The authors considered this to be a very good indication that the entire mass extinction event in Australia was due to human activity, rather than climate change. An extinction event (also extinction-level event, ELE) is a period in time when a large number of species die out. ...
Miller GH, Magee JW, Johnson BJ, Fogel ML, Spooner NA, McCulloch MT, Ayliffe LK., Pleistocene extinction of genyornis newtoni: human impact on australian megafauna (1999), Science283, 205-8.
Genyornis (Genyornis newtoni) was a monotypic genus of large, flightless bird that lived in Australia until about 26,000 years ago.
Through this means, it was determined that Genyornis declined and became extinct over a short period of time -- too short for it to be plausibly explained by climate change.
The authors considered this to be a very good indication that the entire mass extinction event in Australia was due to human activity, rather than climate change.
Genyornis couldn't adapt to radical changes in the available food supply, while the emu could, according to a geological study published in the July 8 issue of Science magazine and co-authored by Bates geochemist Beverly Johnson.
But the tale of Genyornis and the emu is the key to a much greater story, one that suggests the human capacity for affecting the environment.
It was that ecological change that doomed Genyornis and it was the human presence that caused the change, say the study's authors.
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