Ecology ppt.
... • Extinction of a species occurs when it ceases to exist; may follow environmental change - if the species does not evolve • Evolution and extinction are affected by: – large scale movements of continents – gradual climate changes due to continental drift or orbit changes – rapid climate changes due ...
... • Extinction of a species occurs when it ceases to exist; may follow environmental change - if the species does not evolve • Evolution and extinction are affected by: – large scale movements of continents – gradual climate changes due to continental drift or orbit changes – rapid climate changes due ...
Conservation and Restoration
... 1. conservation biology: integrates ecology, physiology, molecular biology, genetics, and evolutionary biology to conserve biological diversity at all levels 2. Restoration ecology: applies ecological principles in an effort to return degraded ecosystems to conditions as similar as possible to their ...
... 1. conservation biology: integrates ecology, physiology, molecular biology, genetics, and evolutionary biology to conserve biological diversity at all levels 2. Restoration ecology: applies ecological principles in an effort to return degraded ecosystems to conditions as similar as possible to their ...
Lecture 17: Biogeography
... • Dist’ns of monophyletic groups over areas are explained by the reconstruction of area cladograms • Congruence of area cladograms of different taxa strengthens argument • Lack of congruence suggests that dispersal & local extinctions important ...
... • Dist’ns of monophyletic groups over areas are explained by the reconstruction of area cladograms • Congruence of area cladograms of different taxa strengthens argument • Lack of congruence suggests that dispersal & local extinctions important ...
Maintaining Sustainable Environments Requires Knowledge
... due to a lack of evidence or studies. – Example: The Golden Toad in Costa Rica has vanished without a clue as to why. ...
... due to a lack of evidence or studies. – Example: The Golden Toad in Costa Rica has vanished without a clue as to why. ...
Mass Extinctions
... vertebrate and plant groups went extinct. • The Earth came close to a pre-Ediacaran (Late Proterozoic) state – i.e., being nearly devoid of multicellular animal and plant life. • Cause(s) of the extinction are not totally known, but may include rapid global warming, anoxic oceans, widespread volcani ...
... vertebrate and plant groups went extinct. • The Earth came close to a pre-Ediacaran (Late Proterozoic) state – i.e., being nearly devoid of multicellular animal and plant life. • Cause(s) of the extinction are not totally known, but may include rapid global warming, anoxic oceans, widespread volcani ...
Mass Extinction
... More than 99 percent of all species that have ever lived are now extinct. Usually, extinctions happen for the reasons that Darwin proposed. Species compete for resources, and environments change. Some species adapt and survive. Others gradually become extinct in ways that are often caused by natural ...
... More than 99 percent of all species that have ever lived are now extinct. Usually, extinctions happen for the reasons that Darwin proposed. Species compete for resources, and environments change. Some species adapt and survive. Others gradually become extinct in ways that are often caused by natural ...
Jeopardy - Mr. Manskopf Environmental Science
... mice, deer, coyotes, and hawks, which species is likely to have the greatest biomass? a. grass b. mice c. coyotes d. hawks ...
... mice, deer, coyotes, and hawks, which species is likely to have the greatest biomass? a. grass b. mice c. coyotes d. hawks ...
Extinctions
... Extinctions have been occurring constantly at a low 'background rate', usually matched by the rate at which new species appear resulting in an overall increase in biodiversity A world without extinction would be really crowded!! ...
... Extinctions have been occurring constantly at a low 'background rate', usually matched by the rate at which new species appear resulting in an overall increase in biodiversity A world without extinction would be really crowded!! ...
CTA-041-Mass Extinction-Earth - The World Federation for Coral
... when the dinosaurs and much else died out 65m years ago, in as little as three human lifetimes. Once more, this is a conservative estimate. It simply considers the kill mechanisms operating today, of habitat loss, predation, pollution and so on. The Caballos projection does not try to factor in, for ...
... when the dinosaurs and much else died out 65m years ago, in as little as three human lifetimes. Once more, this is a conservative estimate. It simply considers the kill mechanisms operating today, of habitat loss, predation, pollution and so on. The Caballos projection does not try to factor in, for ...
The history of life is punctuated by mass extinction
... • The formation of Pangaea surely had tremendous environmental impacts that reshaped biological diversity by causing extinctions and providing new opportunities for taxonomic groups that survived the crisis. ...
... • The formation of Pangaea surely had tremendous environmental impacts that reshaped biological diversity by causing extinctions and providing new opportunities for taxonomic groups that survived the crisis. ...
power point
... Increasing numbers of species disappearing every day. Extinction of different kinds of organisms has been much greater than before. A variety of human activities are the main causes. ...
... Increasing numbers of species disappearing every day. Extinction of different kinds of organisms has been much greater than before. A variety of human activities are the main causes. ...
biodiversity_loss_and_species_extinction
... skins, etc.) are the livelihood of some of the poor in these countries. However, poaching also leads to extirpation and sometimes extinction of those species. Compare and contrast the positive and negative aspects of poaching and come to a conclusion as to whether poaching ...
... skins, etc.) are the livelihood of some of the poor in these countries. However, poaching also leads to extirpation and sometimes extinction of those species. Compare and contrast the positive and negative aspects of poaching and come to a conclusion as to whether poaching ...
The Nitrogen Cycle The Nitrogen Cycle
... Urban ecology: studying humanenvironment interactions in and of cities (1) Ecology in the city (disturbance) (2) Ecology of the city Treat the city as an ecosystem and ...
... Urban ecology: studying humanenvironment interactions in and of cities (1) Ecology in the city (disturbance) (2) Ecology of the city Treat the city as an ecosystem and ...
Pleistocene Megafauna Extinction
... megaherbivores greatly alter their habitat, and if their numbers are reduced by humans, the landscape will be changed significantly enough as to exclude many other (nonhunted) species of wildlife. This theory accounts for the extinction of many non-game animals during this period. It is uncertain to ...
... megaherbivores greatly alter their habitat, and if their numbers are reduced by humans, the landscape will be changed significantly enough as to exclude many other (nonhunted) species of wildlife. This theory accounts for the extinction of many non-game animals during this period. It is uncertain to ...
Ecological Niches and Adaptation
... when the population cannot adapt to changing environmental conditions. The ...
... when the population cannot adapt to changing environmental conditions. The ...
Earth is in the midst of its sixth mass extinction event
... sad truth is that Earth is in the midst of its sixth mass extinction event. The term “extinction event” is used to define any period from three to twenty centuries, during which the planet loses 75 percent of its biodiversity. The world has lost 52 percent of its wildlife in the past four decades al ...
... sad truth is that Earth is in the midst of its sixth mass extinction event. The term “extinction event” is used to define any period from three to twenty centuries, during which the planet loses 75 percent of its biodiversity. The world has lost 52 percent of its wildlife in the past four decades al ...
Document
... Ongoing fishing ,hunting, or gathering over a species' rebound rate is overkill. Overkill can easily threaten a species. Habitat destruction is a leading cause of species extinction. The primary reason for this is the needed expansion of land for the human population. Humans have introduced countles ...
... Ongoing fishing ,hunting, or gathering over a species' rebound rate is overkill. Overkill can easily threaten a species. Habitat destruction is a leading cause of species extinction. The primary reason for this is the needed expansion of land for the human population. Humans have introduced countles ...
Population Ecology, Biodiversity and Conservation
... birth and infant mortality rates high, but declining • Less developed countries (Bangladesh, Niger, Ethiopia, Laos, Cambodia, etc.): highest birth and infant mortality rates and lowest life expectancies ...
... birth and infant mortality rates high, but declining • Less developed countries (Bangladesh, Niger, Ethiopia, Laos, Cambodia, etc.): highest birth and infant mortality rates and lowest life expectancies ...
glossary
... Predation: a relation between animals in which one organism captures and feeds on others. In this relationship, only the predator benefits. Extinction: When a species is no longer in existence, because it has died out. Background Extinction: The ongoing extinction of individual species due to enviro ...
... Predation: a relation between animals in which one organism captures and feeds on others. In this relationship, only the predator benefits. Extinction: When a species is no longer in existence, because it has died out. Background Extinction: The ongoing extinction of individual species due to enviro ...
Humans in the Biosphere (ch 6)
... o Sustainable development would include aquaculture (raising aquatic animals for food) ...
... o Sustainable development would include aquaculture (raising aquatic animals for food) ...
Sustaining Biodiversity - species Mass extinction events Levels of
... Reduced numbers in Aleutean Islands lead to increase in sea urchins; kelp forests devastated (photo: www.turtletrack.org) ...
... Reduced numbers in Aleutean Islands lead to increase in sea urchins; kelp forests devastated (photo: www.turtletrack.org) ...
Extinction and Extirpation
... Extinction: the disappearance of every individual of a species from the entire planet (once extinct they are GONE). Different research comes up with different numbers but it is estimated that 50 – 100 species go extinct every day! Don’t forget, while we tend to think more about animals, any living o ...
... Extinction: the disappearance of every individual of a species from the entire planet (once extinct they are GONE). Different research comes up with different numbers but it is estimated that 50 – 100 species go extinct every day! Don’t forget, while we tend to think more about animals, any living o ...
Populations and Humans in the Biosphere
... extinction and mass extinction? – Background extinction is a gradual process; mass extinction is a large percentage of species gone extinct ...
... extinction and mass extinction? – Background extinction is a gradual process; mass extinction is a large percentage of species gone extinct ...
Holocene extinction
The Holocene extinction, sometimes called the Sixth Extinction, is a name proposed to describe the currently ongoing extinction event of species during the present Holocene epoch (since around 10,000 BCE) mainly due to human activity. The large number of extinctions span numerous families of plants and animals including mammals, birds, amphibians, reptiles and arthropods. Although 875 extinctions occurring between 1500 and 2009 have been documented by the International Union for Conservation of Nature and Natural Resources, the vast majority are undocumented. According to the species-area theory and based on upper-bound estimating, the present rate of extinction may be up to 140,000 species per year.The Holocene extinction includes the disappearance of large mammals known as megafauna, starting between 9,000 and 13,000 years ago, the end of the last Ice Age. This may have been due to the extinction of the mammoths whose habits had maintained grasslands which became birch forests without them. The new forest and the resulting forest fires may have induced climate change. Such disappearances might be the result of the proliferation of modern humans. These extinctions, occurring near the Pleistocene–Holocene boundary, are sometimes referred to as the Quaternary extinction event. The Holocene extinction continues into the 21st century.There is no general agreement on whether to consider this as part of the Quaternary extinction event, or as a distinct event resulting from human-caused changes. Only during the most recent parts of the extinction have plants also suffered large losses. Overall, the Holocene extinction can be characterized by the human impact on the environment.