MS Word - Lopers.Net
... Habitat loss is the number one reason for species extinction. Humans are the biggest contributor to habitat loss. The rates of extinction are increasing causing many scientists to fear that humans are causing the loss of 50% of known biodiversity in the next 50 years. The best way to increase conser ...
... Habitat loss is the number one reason for species extinction. Humans are the biggest contributor to habitat loss. The rates of extinction are increasing causing many scientists to fear that humans are causing the loss of 50% of known biodiversity in the next 50 years. The best way to increase conser ...
Exploring the distributions of species in mixed/short grass prairies in
... a) Explore the differences between a cow, a bison and a mammoth. Using allometric equations (e.g., see appendixes in J.H. Peters. 1984. The ecological implications of body size), compute the difference in various life history factors such as metabolic rate, forage requirements, home range, fecundity ...
... a) Explore the differences between a cow, a bison and a mammoth. Using allometric equations (e.g., see appendixes in J.H. Peters. 1984. The ecological implications of body size), compute the difference in various life history factors such as metabolic rate, forage requirements, home range, fecundity ...
Lecture 8 Conservation
... • Claims that there’s no effect, or a beneficial effect, on native populations • However, effects of roundups on wild populations largely undocumented ...
... • Claims that there’s no effect, or a beneficial effect, on native populations • However, effects of roundups on wild populations largely undocumented ...
Document
... deleterious mutations. (Also proposed that some part of morphological evolution is caused by neutral mutation.) Nei, M. 2005. Selectionism and neutralism in molecular evolution. Mol. Biol. Evol. 22:2318-2342. ...
... deleterious mutations. (Also proposed that some part of morphological evolution is caused by neutral mutation.) Nei, M. 2005. Selectionism and neutralism in molecular evolution. Mol. Biol. Evol. 22:2318-2342. ...
PwrPt7
... • Greatest cause of biodiversity loss • Organisms, adapted to their habitat, decline in population when the habitat changes. • Habitat fragmentation: Patches of suitable habitat surrounded by unsuitable habitat • In general, larger habitat fragments can support greater biodiversity than smaller frag ...
... • Greatest cause of biodiversity loss • Organisms, adapted to their habitat, decline in population when the habitat changes. • Habitat fragmentation: Patches of suitable habitat surrounded by unsuitable habitat • In general, larger habitat fragments can support greater biodiversity than smaller frag ...
Extinction and Biodiversity Loss
... Habitat change and loss is by far the greatest cause of biodiversity loss today. It is the primary source of population declines for 83% of threatened mammals and 85% of threatened birds, according to UNEP data. As one example, less than 1% of the prairies native to North America’s Great Plains rema ...
... Habitat change and loss is by far the greatest cause of biodiversity loss today. It is the primary source of population declines for 83% of threatened mammals and 85% of threatened birds, according to UNEP data. As one example, less than 1% of the prairies native to North America’s Great Plains rema ...
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 ...
Chapter 11 - School District of La Crosse
... Locally: A species is no longer found in an area it once inhabited but is still found elsewhere in the world. Ecologically: Occurs when so few members of a species are left they no longer play its ecological role. Globally (biologically): Species is no longer found on the earth. ...
... Locally: A species is no longer found in an area it once inhabited but is still found elsewhere in the world. Ecologically: Occurs when so few members of a species are left they no longer play its ecological role. Globally (biologically): Species is no longer found on the earth. ...
Genetic Diversity and Marine Populations
... Population Viability and Recovery Plans • Biological information is not used as much expected in recovery plans • Tear et al. (1993) found that 28% of recovery plans set the target population size for recovery at or below the population size when listed • 37% of plans set the number of populations ...
... Population Viability and Recovery Plans • Biological information is not used as much expected in recovery plans • Tear et al. (1993) found that 28% of recovery plans set the target population size for recovery at or below the population size when listed • 37% of plans set the number of populations ...
Origin of species
... Rates of speciation after an extinction may take about 10 my Takes time for: Ecosystems to recover Processes of speciation and adaptive diversification to begin Not all groups of organisms are affected equally during extinctions A sixth extinction is underway Estimates: 1/4th of all sp ...
... Rates of speciation after an extinction may take about 10 my Takes time for: Ecosystems to recover Processes of speciation and adaptive diversification to begin Not all groups of organisms are affected equally during extinctions A sixth extinction is underway Estimates: 1/4th of all sp ...
Chapter 11 - School District of La Crosse
... Locally: A species is no longer found in an area it once inhabited but is still found elsewhere in the world. Ecologically: Occurs when so few members of a species are left they no longer play its ecological role. Globally (biologically): Species is no longer found on the earth. ...
... Locally: A species is no longer found in an area it once inhabited but is still found elsewhere in the world. Ecologically: Occurs when so few members of a species are left they no longer play its ecological role. Globally (biologically): Species is no longer found on the earth. ...
Invasive Species
... that are normally found in a particular area and they thrive in that environment ...
... that are normally found in a particular area and they thrive in that environment ...
14.1 Habitat And Niche
... • Species can share habitats and resources. • Competition occurs when two species use resources in the same way. • Competitive exclusion keeps two species from occupying the same niche. ...
... • Species can share habitats and resources. • Competition occurs when two species use resources in the same way. • Competitive exclusion keeps two species from occupying the same niche. ...
Chap. 3 Extinction
... South America coinciding with the arrival of humans (11 thousand years ago) – North America lost 73% of its genera of large ...
... South America coinciding with the arrival of humans (11 thousand years ago) – North America lost 73% of its genera of large ...
Common language
... •Focus traditionally at the local scale •need to switch to metapopulation scale ...
... •Focus traditionally at the local scale •need to switch to metapopulation scale ...
Pleistocene Megafauna Extinction
... (e.g. Africa.) Melt water flowing south down the Mississippi altered sea surface temperatures (SST) in the Gulf of Mexico and the Caribbean, while cold water flowing north into the St. Lawrence changed SST in the North Atlantic. Models using the estimated SST and GCM’s, show that both events (water ...
... (e.g. Africa.) Melt water flowing south down the Mississippi altered sea surface temperatures (SST) in the Gulf of Mexico and the Caribbean, while cold water flowing north into the St. Lawrence changed SST in the North Atlantic. Models using the estimated SST and GCM’s, show that both events (water ...
PowerPoint Presentation - #2 Speciation and Biodiversity
... • A much lower estimate of ~1400 extinctions per yr (=0.7% in 50 years) was derived by Lomborg (1998). This is still ~1500 times greater than estimated “background” rates from geological data Lomborg (1998) The Skeptical Environmentalist: Measuring the Real State of the World. Cambridge U.P. ...
... • A much lower estimate of ~1400 extinctions per yr (=0.7% in 50 years) was derived by Lomborg (1998). This is still ~1500 times greater than estimated “background” rates from geological data Lomborg (1998) The Skeptical Environmentalist: Measuring the Real State of the World. Cambridge U.P. ...
Extinctions and threat in the sea
... hybrids or aberrant specimens (Carlton et al. 1999). In many cases there is little museum reference material to work with, so it is unlikely that this problem can be resolved. In summary, excluding these uncertain records, there is good evidence that between 18-21 species have become globally extinc ...
... hybrids or aberrant specimens (Carlton et al. 1999). In many cases there is little museum reference material to work with, so it is unlikely that this problem can be resolved. In summary, excluding these uncertain records, there is good evidence that between 18-21 species have become globally extinc ...
Chapter 5 Study Guide –KEY
... 3. What is the competitive exclusion principle? Give an example from marine biology. It’s the theory that states that no two species can occupy the same niche and compete for the same resources in the habitat for a very long time. Example: A classic example from marine biology is the competition bet ...
... 3. What is the competitive exclusion principle? Give an example from marine biology. It’s the theory that states that no two species can occupy the same niche and compete for the same resources in the habitat for a very long time. Example: A classic example from marine biology is the competition bet ...
ENVI 30 Environmental Issues
... Ex – Coelacanth, ivory billed woodpecker, giant lemur Species distributed unevenly (patchy distribution) ...
... Ex – Coelacanth, ivory billed woodpecker, giant lemur Species distributed unevenly (patchy distribution) ...
Metapopulation → Metacommunity Metacommunity model example
... patch use (source-sink dynamics) • How does movement rate of species at the patch scale impact metrics of diversity? • Metapopulation-community model – Local species compete for available patches – Variable rates of colonization ...
... patch use (source-sink dynamics) • How does movement rate of species at the patch scale impact metrics of diversity? • Metapopulation-community model – Local species compete for available patches – Variable rates of colonization ...