marsupials - Studyladder
... Australia’s largest carnivorous marsupial, the thylacine (Tasmanian tiger,) once lived across the mainland of Australia as well as on the island of Tasmania. It is most likely that the mainland population decreased and due to competition from the Dingo which was introduced 3-4 thousand years ago. Th ...
... Australia’s largest carnivorous marsupial, the thylacine (Tasmanian tiger,) once lived across the mainland of Australia as well as on the island of Tasmania. It is most likely that the mainland population decreased and due to competition from the Dingo which was introduced 3-4 thousand years ago. Th ...
The search for evidence of mass extinction
... each year, or probabilistically, on average one each year), and also on whether there is a finite limit to resources. Alternatively, consider a community where species do not all compete for the same resources. Consider further that some resources become available only after particular species have ...
... each year, or probabilistically, on average one each year), and also on whether there is a finite limit to resources. Alternatively, consider a community where species do not all compete for the same resources. Consider further that some resources become available only after particular species have ...
Human acceleration of animal and plant extinctions: A Late
... of 150 genera (Koch and Barnosky, 2006:216) going extinct by 10,000 cal BP (calendar years before present). A variety of scientists have weighed in on the possible cause(s) of this extinction, citing natural climate and habitat change, human hunting, disease, or a combination of these (Table 2). The ...
... of 150 genera (Koch and Barnosky, 2006:216) going extinct by 10,000 cal BP (calendar years before present). A variety of scientists have weighed in on the possible cause(s) of this extinction, citing natural climate and habitat change, human hunting, disease, or a combination of these (Table 2). The ...
0495810843_246868
... Around 70 mya, the earth began to experience sever climatic changes and many of the larger reptiles and dinosaurs went extinct, opening new environmental niches for mammals. Mammal-like animals were preadapted to advantages of these changes and underwent an adaptive radiation -a rapid increase in th ...
... Around 70 mya, the earth began to experience sever climatic changes and many of the larger reptiles and dinosaurs went extinct, opening new environmental niches for mammals. Mammal-like animals were preadapted to advantages of these changes and underwent an adaptive radiation -a rapid increase in th ...
Meat-eaters versus carnivores: Is your diet killing wolves?
... Many large carnivores are also considered to be keystone predators, who play crucial roles within their ecosystems – roles that are shaped by the size, metabolic demands, sociality, and hunting tactics, of each individuals. "Each one of them becomes more important because there's fewer of them," exp ...
... Many large carnivores are also considered to be keystone predators, who play crucial roles within their ecosystems – roles that are shaped by the size, metabolic demands, sociality, and hunting tactics, of each individuals. "Each one of them becomes more important because there's fewer of them," exp ...
Lecture 17, adaptive radiation + ecology
... Results from extreme, sudden, temporary change in the global environment ...
... Results from extreme, sudden, temporary change in the global environment ...
• Sexual selection thought to be equally important as natural
... average fitness • Increasing genetic variability produces a wider array of phenotypes – more likely to produce “superfit” individual. ...
... average fitness • Increasing genetic variability produces a wider array of phenotypes – more likely to produce “superfit” individual. ...
macroevolution
... • Work on the genetics of Drosophila have documented the existence of a group of genes termed the “homeotic selector genes.” These genes produce proteins that “turn on” other genes by directly bonding to specific DNA sequences, causing these genes to produce proteins: molecular dominoes. Thru the ac ...
... • Work on the genetics of Drosophila have documented the existence of a group of genes termed the “homeotic selector genes.” These genes produce proteins that “turn on” other genes by directly bonding to specific DNA sequences, causing these genes to produce proteins: molecular dominoes. Thru the ac ...
macroevolution
... • Work on the genetics of Drosophila have documented the existence of a group of genes termed the “homeotic selector genes.” These genes produce proteins that “turn on” other genes by directly bonding to specific DNA sequences, causing these genes to produce proteins: molecular dominoes. Thru the ac ...
... • Work on the genetics of Drosophila have documented the existence of a group of genes termed the “homeotic selector genes.” These genes produce proteins that “turn on” other genes by directly bonding to specific DNA sequences, causing these genes to produce proteins: molecular dominoes. Thru the ac ...
extinct
... Spacing and patch (island) density effects-- ratio of time inside patch away from edge effects to time between patches. Fractal geometry and measurement scale-- one species ruler is another’s yardstick, e.g. barnacles vs. eagles (Fig 18.7 Read. Assn.). What effect does measurement scale have on c ...
... Spacing and patch (island) density effects-- ratio of time inside patch away from edge effects to time between patches. Fractal geometry and measurement scale-- one species ruler is another’s yardstick, e.g. barnacles vs. eagles (Fig 18.7 Read. Assn.). What effect does measurement scale have on c ...
第12章 生活史Life Histories
... Plants vary widely in the number of offspring they produce,ranging from those that produce many small seeds to those that produce a few large seeds. ...
... Plants vary widely in the number of offspring they produce,ranging from those that produce many small seeds to those that produce a few large seeds. ...
The History of Evolution of Life on Earth Told by Paleoparasitology
... Through the study of parasites and other microorganisms in ancient material Paleoparasitology can presuppose on the way of life of our ancestors, established relations with and between animals and the environment, and their reflexes until the contemporary period dealing with several areas of knowled ...
... Through the study of parasites and other microorganisms in ancient material Paleoparasitology can presuppose on the way of life of our ancestors, established relations with and between animals and the environment, and their reflexes until the contemporary period dealing with several areas of knowled ...
Ecology - My eCoach
... the end-Cretaceous. It wiped out the remaining terrestrial dinosaurs and marine ammonites, as well as many other species across the phylogenetic spectrum, in all habitats sampled from the fossil record. Consensus has emerged in the past decade that this event was caused by one (possibly multiple) co ...
... the end-Cretaceous. It wiped out the remaining terrestrial dinosaurs and marine ammonites, as well as many other species across the phylogenetic spectrum, in all habitats sampled from the fossil record. Consensus has emerged in the past decade that this event was caused by one (possibly multiple) co ...
Final Review #1
... 47.What are the four types of swimming locomotion? Describe? Carangiform-front half body rigid, back half moves Ostraciiform-only caudal fin moves Appendicular-appendages move angulliform- most of body used 48.What are the three types of instability? Describe. Roll- move side to side Pitch-up and do ...
... 47.What are the four types of swimming locomotion? Describe? Carangiform-front half body rigid, back half moves Ostraciiform-only caudal fin moves Appendicular-appendages move angulliform- most of body used 48.What are the three types of instability? Describe. Roll- move side to side Pitch-up and do ...
Introduction to Wildlife Management
... good of the greatest number (of people) for the longest time. (G. Pinchot) • Resources should be fairly distributed among ...
... good of the greatest number (of people) for the longest time. (G. Pinchot) • Resources should be fairly distributed among ...
Madro-Tertiary Geoflora of the Pacific Northwest
... This shows the Earth's temperature since the extinction of the dinosaurs about 65 million years ago - the end of the Mesozoic and beginning of the Cenozoic. At first the Earth warmed up, reaching its warmest 50 million years ago: the "Eocene Optimum". The spike before that labelled "PETM" is a fasc ...
... This shows the Earth's temperature since the extinction of the dinosaurs about 65 million years ago - the end of the Mesozoic and beginning of the Cenozoic. At first the Earth warmed up, reaching its warmest 50 million years ago: the "Eocene Optimum". The spike before that labelled "PETM" is a fasc ...
Saving the World`s Terrestrial Megafauna
... 8. S trive for increased awareness among the global public of the current megafauna crisis using traditional media as well as social media and other networking approaches. 9. S eek a new and comprehensive global commitment and framework for conserving megafauna. The international community shoul ...
... 8. S trive for increased awareness among the global public of the current megafauna crisis using traditional media as well as social media and other networking approaches. 9. S eek a new and comprehensive global commitment and framework for conserving megafauna. The international community shoul ...
A38-Mammals
... • Have various glands, including mammary glands that produce milk • Endothermic (warm-blooded) • Can keep a stable temperature by using energy from food • Hair/fur and fat also provide insulation ...
... • Have various glands, including mammary glands that produce milk • Endothermic (warm-blooded) • Can keep a stable temperature by using energy from food • Hair/fur and fat also provide insulation ...
The Amazon Rainforest
... • A tropical rainforest is an ecosystem that occurs in the equatorial zone between the Tropic of Cancer and Tropic of Capricorn. • High average temperatures • Significant amount of rainfall. ...
... • A tropical rainforest is an ecosystem that occurs in the equatorial zone between the Tropic of Cancer and Tropic of Capricorn. • High average temperatures • Significant amount of rainfall. ...
exam formatted for Word
... 2.) _______ What is the importance of the Wopmay orogen in Canada? a.) it is a "modern" plate tectonic event; b.) it is the oldest mountain range in the Precambrian; c.) the oldest rocks ever found came from this location; d.) they show the earliest large cratons first formed in Africa. 3.) _______ ...
... 2.) _______ What is the importance of the Wopmay orogen in Canada? a.) it is a "modern" plate tectonic event; b.) it is the oldest mountain range in the Precambrian; c.) the oldest rocks ever found came from this location; d.) they show the earliest large cratons first formed in Africa. 3.) _______ ...
Macroevolution
... • Changes that occur at or above the level of species • Describes the processes and patterns of originations, adaptations and extinctions • Reconstructs climates and environments in which species lived ...
... • Changes that occur at or above the level of species • Describes the processes and patterns of originations, adaptations and extinctions • Reconstructs climates and environments in which species lived ...
Mammals
... Short digestive tract More leisure time because do not have to continuously graze Humans have exterminated many carnivores from areas; led to more crop pests in these areas ...
... Short digestive tract More leisure time because do not have to continuously graze Humans have exterminated many carnivores from areas; led to more crop pests in these areas ...
4.2.2-.4 Causes of Extinction
... Valuable economically (hunted) Vulnerable to pollution Incompatible with civilization ...
... Valuable economically (hunted) Vulnerable to pollution Incompatible with civilization ...
Megafauna
In terrestrial zoology, megafauna (Ancient Greek megas ""large"" + New Latin fauna ""animal"") are large or giant animals. The most common thresholds used are 45 kilograms (100 lb) or 100 kilograms (220 lb). This thus includes many species not popularly thought of as overly large, such as white-tailed deer, red kangaroo, and humans.In practice, the most common usage encountered in academic and popular writing describes land animals roughly larger than a human that are not (solely) domesticated. The term is especially associated with the Pleistocene megafauna – the land animals often larger than modern counterparts considered archetypical of the last ice age, such as mammoths, the majority of which in northern Eurasia, the Americas and Australia became extinct as recently as 10,000–40,000 years ago. It is also commonly used for the largest extant wild land animals, especially elephants, giraffes, hippopotamuses, rhinoceroses, and large bovines. Megafauna may be subcategorized by their trophic position into megaherbivores (e.g., elk), megacarnivores (e.g., lions), and, more rarely, megaomnivores (e.g., bears).Other common uses are for giant aquatic species, especially whales, any larger wild or domesticated land animals such as larger antelope and cattle, as well as numerous dinosaurs and other extinct giant reptilians.The term is also sometimes applied to animals (usually extinct) of great size relative to a more common or surviving type of the animal, for example the 1 m (3 ft) dragonflies of the Carboniferous period.