Evolution: How Some Birds Survived When All Other Dinosaurs Died
نویسنده
چکیده
The end-Cretaceous mass extinction wiped out the dinosaurs, including many birds. But some bird lineages survived. May seed-eating have been the key?
منابع مشابه
From Dinosaurs to Modern Bird Diversity: Extending the Time Scale of Adaptive Radiation
What explains why some groups of organisms, like birds, are so species rich? And what explains their extraordinary ecological diversity, ranging from large, flightless birds to small migratory species that fly thousand of kilometers every year? These and similar questions have spurred great interest in adaptive radiation, the diversification of ecological traits in a rapidly speciating group of...
متن کاملWas Dinosaurian Physiology Inherited by Birds? Reconciling Slow Growth in Archaeopteryx
BACKGROUND Archaeopteryx is the oldest and most primitive known bird (Avialae). It is believed that the growth and energetic physiology of basalmost birds such as Archaeopteryx were inherited in their entirety from non-avialan dinosaurs. This hypothesis predicts that the long bones in these birds formed using rapidly growing, well-vascularized woven tissue typical of non-avialan dinosaurs. ME...
متن کاملEvolution. Who's your daddy?
T he recognition that birds are theropod dinosaurs has redefined the science of ornithology as extant dinosaur biology (1). The placement of birds in a detailed evolutionary context has led to exciting discoveries about the commonalities birds share with their dinosaur ancestors, including feathers (2) and possibly flight (3). Insights have been gained into both the origins of avian biology and...
متن کاملHow Birds Have Come Into Existence . Helene
In particular, this paper deals with the lineage of birds, and how it may be possible to trace them back to their origin which appears to be from Dinosaurs (esp. Therapods). This paper is an application of tracing various lineages in the fossil record. The idea is that if we can find small changes with each successive form, then we can show their descent with modifications. Of most importance i...
متن کاملBiomechanics of Running Indicates Endothermy in Bipedal Dinosaurs
BACKGROUND One of the great unresolved controversies in paleobiology is whether extinct dinosaurs were endothermic, ectothermic, or some combination thereof, and when endothermy first evolved in the lineage leading to birds. Although it is well established that high, sustained growth rates and, presumably, high activity levels are ancestral for dinosaurs and pterosaurs (clade Ornithodira), othe...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Current Biology
دوره 26 شماره
صفحات -
تاریخ انتشار 2016