Human Impact on the Environment:
... something on the order of 30,000 species per year — which breaks down to the even more daunting statistic of some three species per hour. Some biologists have begun to feel that this biodiversity crisis — this “Sixth Extinction” — is even more severe, and more imminent, than Wilson had supposed. ...
... something on the order of 30,000 species per year — which breaks down to the even more daunting statistic of some three species per hour. Some biologists have begun to feel that this biodiversity crisis — this “Sixth Extinction” — is even more severe, and more imminent, than Wilson had supposed. ...
Factors that make Species Prone to Extinction
... Lack of mobility and poor defensive instincts make them sitting targets. Animals that evolved in the absence of predators are prone to extinction once a predator (including man!) is introduced. o E.g. the dodo on Mauritius had no predators and therefore did not need to fly o E.g. other flightles ...
... Lack of mobility and poor defensive instincts make them sitting targets. Animals that evolved in the absence of predators are prone to extinction once a predator (including man!) is introduced. o E.g. the dodo on Mauritius had no predators and therefore did not need to fly o E.g. other flightles ...
Biodiversity Crisis
... • Decline in biodiversity due to human activities more rapid in past 50 yrs than at any time in human history • Over last 100 yrs, human-caused species extinctions have multiplied ~ 1,000 times • 12 % of birds, 23% of mammals, and 32% of amphibians are threatened with extinction ...
... • Decline in biodiversity due to human activities more rapid in past 50 yrs than at any time in human history • Over last 100 yrs, human-caused species extinctions have multiplied ~ 1,000 times • 12 % of birds, 23% of mammals, and 32% of amphibians are threatened with extinction ...
2) Antarctica- Blue Whale Biological Role: Diet of small crustaceans
... calves. It lives in the dry parts of southern Africa. Instrumental Value: It has fur that can be sold and used in clothing. Human Activities: Habitat being destroyed by humans, which has reduced the prey on which it feeds. 4) Australia-Banded Hare Wallaby Biological Role: Found in Western Australia. ...
... calves. It lives in the dry parts of southern Africa. Instrumental Value: It has fur that can be sold and used in clothing. Human Activities: Habitat being destroyed by humans, which has reduced the prey on which it feeds. 4) Australia-Banded Hare Wallaby Biological Role: Found in Western Australia. ...
Global Climate Change
... This extraordinary rate of extinction has occurred only five times before in the history of life on Earth. Mass extinction of the geological past were caused by catastrophic physical disasters, such as climate changes or meteorite impacts, which destroyed and disrupted ecosystems around the globe. I ...
... This extraordinary rate of extinction has occurred only five times before in the history of life on Earth. Mass extinction of the geological past were caused by catastrophic physical disasters, such as climate changes or meteorite impacts, which destroyed and disrupted ecosystems around the globe. I ...
Chapter 6: Humans in the Biosphere
... Led to the combination of industrial productivity and scientific know-how that provides most of the conveniences of modern life ...
... Led to the combination of industrial productivity and scientific know-how that provides most of the conveniences of modern life ...
Lecture 08 - Extinction
... o –species have broad geographic ranges - those with small geographic ranges may be eliminated earlier, and o –suitable habitat will remain within the ranges of most species Background or normal extinction rate is assumed to be about 1 to 10 species per year Estimated extinction rate in this exa ...
... o –species have broad geographic ranges - those with small geographic ranges may be eliminated earlier, and o –suitable habitat will remain within the ranges of most species Background or normal extinction rate is assumed to be about 1 to 10 species per year Estimated extinction rate in this exa ...
Sustaining Biodiversity – The Species Approach
... Errrr! Humans! What effect do we have? • Biologists estimate that we have a huge impact! • Species are becoming extinct 100 to 1,000 times faster than they were before modern humans arrived on the earth • This equals about .01-1% a year. ...
... Errrr! Humans! What effect do we have? • Biologists estimate that we have a huge impact! • Species are becoming extinct 100 to 1,000 times faster than they were before modern humans arrived on the earth • This equals about .01-1% a year. ...
Stories from the Fossil Record Evidence Chart Key
... 1. growth rings in fossil trees Growth rings tell us the number of years that or shells individual lived. 2. curled up fossil trilobites ...
... 1. growth rings in fossil trees Growth rings tell us the number of years that or shells individual lived. 2. curled up fossil trilobites ...
Biodiversity has been affected by five mass extinction
... earth's ozone layer, causing intense ultraviolet radiation from the sun. It may account for climate changes observed at the time. The late Devonian extinction may have occurred over a relatively long period of time. Its causes are poorly-understood and it appears to have have affected only marine sp ...
... earth's ozone layer, causing intense ultraviolet radiation from the sun. It may account for climate changes observed at the time. The late Devonian extinction may have occurred over a relatively long period of time. Its causes are poorly-understood and it appears to have have affected only marine sp ...
Biological Diversity
... •Mainly effected animals rather than plants Possible causes: •Climate change •Flood basalt eruptions •Impact event ...
... •Mainly effected animals rather than plants Possible causes: •Climate change •Flood basalt eruptions •Impact event ...
The Big Kill - impossible2Possible
... disappearance was caused by a combination of climate change and over-hunting by humans. The mammoth had flourished during the last ice age, but when temperatures began to warm their habitat gradually decreased from 7.7 million to less than one million square kilometers. Although mammoths had survive ...
... disappearance was caused by a combination of climate change and over-hunting by humans. The mammoth had flourished during the last ice age, but when temperatures began to warm their habitat gradually decreased from 7.7 million to less than one million square kilometers. Although mammoths had survive ...
Extinctions, Endangered Species, and Hope
... Accidentally introduced via ballest water in oil tankers It’s a major carnivorous predator of zooplankton, as well as meroplankton, pelagic fish eggs and larvae ...
... Accidentally introduced via ballest water in oil tankers It’s a major carnivorous predator of zooplankton, as well as meroplankton, pelagic fish eggs and larvae ...
Lecture 2: Human Impact - Rainforests and Coral Reefs Wiki
... Ecosystems depend on species interactions ...
... Ecosystems depend on species interactions ...
Chapter 11 Reading Questions:
... limit their spread with pesticides? 36. How can we prevent the introduction of nonnative species END of ASSIGNMENT 1! ...
... limit their spread with pesticides? 36. How can we prevent the introduction of nonnative species END of ASSIGNMENT 1! ...
Climate - WordPress.com
... about 11,000 BCE and has been attributed to anthropogenic causes by a majority of biologists. Human-induced climate change, overexploitation, deforestation, and the introduction of non-native species may have all played a role. ...
... about 11,000 BCE and has been attributed to anthropogenic causes by a majority of biologists. Human-induced climate change, overexploitation, deforestation, and the introduction of non-native species may have all played a role. ...
species - Bennatti
... • Only live in one specific place (geographic location or habitat type – usually islands) • Very vulnerable to extinction as a result of habitat loss or degradation. ...
... • Only live in one specific place (geographic location or habitat type – usually islands) • Very vulnerable to extinction as a result of habitat loss or degradation. ...
Ch57_Lecture Conserv Bio
... Photo 57.10 Arabian oryx, saved from extinction by captives being reintroduced into the wild. ...
... Photo 57.10 Arabian oryx, saved from extinction by captives being reintroduced into the wild. ...
Chapter 3
... • Environmental conditions consistent – favors specialists. Fewer competitors, food plentiful • Rapidly changing environmental conditions – favors generalists… More adaptable. ...
... • Environmental conditions consistent – favors specialists. Fewer competitors, food plentiful • Rapidly changing environmental conditions – favors generalists… More adaptable. ...
Extinction - WordPress.com
... • Sea Otters have since been reintroduced to the Asian coast lines and now the ecosystem is beginning to look as it did, and the natural balance is being ...
... • Sea Otters have since been reintroduced to the Asian coast lines and now the ecosystem is beginning to look as it did, and the natural balance is being ...
Loss of Biodiversity
... • economic value of biodiversity lost or threatened • “ecological services” lost or threatened • ecosystems more vulnerable to further degradation ...
... • economic value of biodiversity lost or threatened • “ecological services” lost or threatened • ecosystems more vulnerable to further degradation ...
Communities, Ecosystems, and Biodiversity
... Similar to photosynthesis, but some predation Nutrient input from smokers, detritus Organisms tightly coupled with environment Open or closed system? Patches far apart, smokers ltd time Organisms have to get there somehow! ...
... Similar to photosynthesis, but some predation Nutrient input from smokers, detritus Organisms tightly coupled with environment Open or closed system? Patches far apart, smokers ltd time Organisms have to get there somehow! ...
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.