Conservation and Ecosystem Powerpoint
... The most severe threats to species loss come from four general categories: Loss or degradation of habitat Introduction of non-native species Overexploitation of species Pollution ...
... The most severe threats to species loss come from four general categories: Loss or degradation of habitat Introduction of non-native species Overexploitation of species Pollution ...
Extinction: bad genes or bad luck?
... behave as a random walk with an absorbing boundary at zero (extinction). Thus, below a certain population size, extinction becomes probable as a purely stochastic phenomenon. The critica1population size varies with the species, of course, but is generally very small. The classic mechanisms of compe ...
... behave as a random walk with an absorbing boundary at zero (extinction). Thus, below a certain population size, extinction becomes probable as a purely stochastic phenomenon. The critica1population size varies with the species, of course, but is generally very small. The classic mechanisms of compe ...
Habitat Loss - David Shepherd Wildlife Foundation
... A place to raise its young and behave naturally Different animals require different habitats. A snow leopard is happiest in the mountains of Central Asia but an earth worm needs to be under ground, in moist soil. When animals and plants share the same habitat, a community is formed and when this com ...
... A place to raise its young and behave naturally Different animals require different habitats. A snow leopard is happiest in the mountains of Central Asia but an earth worm needs to be under ground, in moist soil. When animals and plants share the same habitat, a community is formed and when this com ...
Population Structures
... thus all patches reach the same apparent quality, despite different intrinsic qualities and different densities of individuals, the ideal free distribution ...
... thus all patches reach the same apparent quality, despite different intrinsic qualities and different densities of individuals, the ideal free distribution ...
Species
... • This rate will increase tenfold in future decades – Human population growth and resource consumption • The Red List = species facing high risks of extinction – Mammal species (21%), bird species (12%) – 17–74% of all other species • In the U.S., in the last 500 years, 237 animal and 30 plant speci ...
... • This rate will increase tenfold in future decades – Human population growth and resource consumption • The Red List = species facing high risks of extinction – Mammal species (21%), bird species (12%) – 17–74% of all other species • In the U.S., in the last 500 years, 237 animal and 30 plant speci ...
Notes towards Biodiversity Chapter 5
... (Anderson 1999). The marine organisms affected include ammonoids, brachiopods, corals, agnathan fish, placoderm fish, ostracods and trilobites (Caughley and Gunn 1996, Dobson 1996, Primack 1998, Lévêque and Mounolou 2001). The picture shows a Devonian example of a trilobite. Suggested causes include ...
... (Anderson 1999). The marine organisms affected include ammonoids, brachiopods, corals, agnathan fish, placoderm fish, ostracods and trilobites (Caughley and Gunn 1996, Dobson 1996, Primack 1998, Lévêque and Mounolou 2001). The picture shows a Devonian example of a trilobite. Suggested causes include ...
Notes towards Biodiversity Chapter 6
... (Anderson 1999). The marine organisms affected include ammonoids, brachiopods, corals, agnathan fish, placoderm fish, ostracods and trilobites (Caughley & Gunn 1996, Dobson 1996, Primack 1998, Lévêque & Mounolou 2001). The picture shows a Devonian example of a trilobite. Suggested causes include cli ...
... (Anderson 1999). The marine organisms affected include ammonoids, brachiopods, corals, agnathan fish, placoderm fish, ostracods and trilobites (Caughley & Gunn 1996, Dobson 1996, Primack 1998, Lévêque & Mounolou 2001). The picture shows a Devonian example of a trilobite. Suggested causes include cli ...
Macroevolution
... marine bivalve is about 14 million years, and the mean expected lifespan of a terrestrial mammal might is about a tenth that. • Climate change, natural disasters, and other phenomena have always caused extinction. • As some species originate, they inevitably drive other species ...
... marine bivalve is about 14 million years, and the mean expected lifespan of a terrestrial mammal might is about a tenth that. • Climate change, natural disasters, and other phenomena have always caused extinction. • As some species originate, they inevitably drive other species ...
biolcons_biodiv_loss - digital
... classification of major threats version 2.1 (http://intranet.iucn.org/ webfiles/doc/SSC/RedList/AuthorityF/threats.rtf, accessed March 2009), which has been recently updated by the threats classification scheme version 3.0 (http://www.iucnredlist.org/static/major_threats). The listing of the 10 driver ...
... classification of major threats version 2.1 (http://intranet.iucn.org/ webfiles/doc/SSC/RedList/AuthorityF/threats.rtf, accessed March 2009), which has been recently updated by the threats classification scheme version 3.0 (http://www.iucnredlist.org/static/major_threats). The listing of the 10 driver ...
Native birds and their habitat needs on Canterbury rivers Published
... 1 – river flow is modified by abstraction, damming or a combination of the two, changing river flows and flood frequencies and magnitudes; 2 – surrounding land use directly impacts on water quality and river management including flood protection schemes which reduce the area of active riverbed; 3 – ...
... 1 – river flow is modified by abstraction, damming or a combination of the two, changing river flows and flood frequencies and magnitudes; 2 – surrounding land use directly impacts on water quality and river management including flood protection schemes which reduce the area of active riverbed; 3 – ...
Habitats
... species cannot specialize, they may be outcompeted by another species occupying the same niche. • An example of this are Darwin’s finches – those finches that survived did so because they were able to adapt to a specific food source. ...
... species cannot specialize, they may be outcompeted by another species occupying the same niche. • An example of this are Darwin’s finches – those finches that survived did so because they were able to adapt to a specific food source. ...
Habitats - Laurel County Schools
... species cannot specialize, they may be outcompeted by another species occupying the same niche. • An example of this are Darwin’s finches – those finches that survived did so because they were able to adapt to a specific food source. ...
... species cannot specialize, they may be outcompeted by another species occupying the same niche. • An example of this are Darwin’s finches – those finches that survived did so because they were able to adapt to a specific food source. ...
Habitats
... species cannot specialize, they may be outcompeted by another species occupying the same niche. • An example of this are Darwin’s finches – those finches that survived did so because they were able to adapt to a specific food source. ...
... species cannot specialize, they may be outcompeted by another species occupying the same niche. • An example of this are Darwin’s finches – those finches that survived did so because they were able to adapt to a specific food source. ...
Lab this week: Go to computer room!! Next lecture: Finish with Ch 23
... • Tropics are older (and less disturbed??) --->more time to accumulate species. • What happened to climate in the tropics during ...
... • Tropics are older (and less disturbed??) --->more time to accumulate species. • What happened to climate in the tropics during ...
Has the debate over genetics and extinction of island endemics truly
... modest levels of inbreeding depression accelerated times to extinction by 25–31% even when other demographic, environmental and catastrophic factors are operating. The major variable explaining variation among species with regard to the impact of inbreeding was the initial population growth rate. Fo ...
... modest levels of inbreeding depression accelerated times to extinction by 25–31% even when other demographic, environmental and catastrophic factors are operating. The major variable explaining variation among species with regard to the impact of inbreeding was the initial population growth rate. Fo ...
Habitat Control (1)
... •Habitat is the area or natural environment in which an organism or population normally lives. A habitat is made up of physical factors such as soil, moisture, range of temperature, and availability of light as well as biotic factors such as the availability of food. •A habitats quality is directly ...
... •Habitat is the area or natural environment in which an organism or population normally lives. A habitat is made up of physical factors such as soil, moisture, range of temperature, and availability of light as well as biotic factors such as the availability of food. •A habitats quality is directly ...
Module 4: Sustainability and Extinction
... did not occur to him at the time and it was only looking back that he realised what his observations could mean. The Galapagos Islands are volcanic and, in geological terms, quite young, the oldest being about 5 million years old. What Darwin observed when he arrived was that each island had a uniqu ...
... did not occur to him at the time and it was only looking back that he realised what his observations could mean. The Galapagos Islands are volcanic and, in geological terms, quite young, the oldest being about 5 million years old. What Darwin observed when he arrived was that each island had a uniqu ...
Indirect commensalism promotes persistence of secondary consumer
... Species at higher trophic levels (carnivores) are particularly vulnerable to extinction [1], and positive indirect interactions among these species have long been considered a potentially important mechanism for the maintenance of species diversity [13 –16]. Competition between resource species can ...
... Species at higher trophic levels (carnivores) are particularly vulnerable to extinction [1], and positive indirect interactions among these species have long been considered a potentially important mechanism for the maintenance of species diversity [13 –16]. Competition between resource species can ...
Indirect commensalism promotes persistence of secondary
... Species at higher trophic levels (carnivores) are particularly vulnerable to extinction [1], and positive indirect interactions among these species have long been considered a potentially important mechanism for the maintenance of species diversity [13– 16]. Competition between resource species can ...
... Species at higher trophic levels (carnivores) are particularly vulnerable to extinction [1], and positive indirect interactions among these species have long been considered a potentially important mechanism for the maintenance of species diversity [13– 16]. Competition between resource species can ...
Predicting Extinction Risk of Brazilian Atlantic Forest
... rates (Grime & Hunt 1975; Benzing 1990). For instance, growth rates of some epiphytes can be lower than those of forest trees that are renowned for their slow growth (Schmidt & Zotz 2002; Laube & Zotz 2003). Because slowgrowing stress-tolerant plants often recover slowly from disturbance events (Gri ...
... rates (Grime & Hunt 1975; Benzing 1990). For instance, growth rates of some epiphytes can be lower than those of forest trees that are renowned for their slow growth (Schmidt & Zotz 2002; Laube & Zotz 2003). Because slowgrowing stress-tolerant plants often recover slowly from disturbance events (Gri ...
Fragmentation
... edges whereas others fare worse. 3) Edge effects do not extend some fixed distance into a habitat type: instead, they vary with topography, local climate, and the species being considered, and the distances may be considerable (Harris 1984, Laurance et al. 1997). 4) Species do not necessarily respon ...
... edges whereas others fare worse. 3) Edge effects do not extend some fixed distance into a habitat type: instead, they vary with topography, local climate, and the species being considered, and the distances may be considerable (Harris 1984, Laurance et al. 1997). 4) Species do not necessarily respon ...
Habitats PPT
... • Before beginning the treatment, species richness and abundance were measured on different moss-covered rocks. Moss was then scraped off in one of four ways: • A) A large area of moss was left as one solid piece (this was the control). • B) The moss habitat was broken into smaller individual pieces ...
... • Before beginning the treatment, species richness and abundance were measured on different moss-covered rocks. Moss was then scraped off in one of four ways: • A) A large area of moss was left as one solid piece (this was the control). • B) The moss habitat was broken into smaller individual pieces ...
Examining the Extinction of the Pleistocene Megafauna
... competition with a superior species, inability to migrate to a more suitable habitat, and extremely rapid environmental change (impossibility of evolutionary adaptation) will all cause extinction of a species (Guilday 1967). These problems are magnified in shrinking habitats and will force the extin ...
... competition with a superior species, inability to migrate to a more suitable habitat, and extremely rapid environmental change (impossibility of evolutionary adaptation) will all cause extinction of a species (Guilday 1967). These problems are magnified in shrinking habitats and will force the extin ...