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Chapter 4 Notes - Riverton High School
Chapter 4 Notes - Riverton High School

... Characteristics of Population Growth ...
AIM: Students will know how to succeed on exams in urban ecology
AIM: Students will know how to succeed on exams in urban ecology

... SWBAT identify 5 ways two populations could become reproductively isolated – SWBAT differentiate between directional, stabilizing, and disruptive selection – SWBAT recognize selection pressure from a word problem and what would happen to a population in response to that pressure ...
Symbiosis: I get by with a little help from my friends*.
Symbiosis: I get by with a little help from my friends*.

... Abiotic Conditions: Non-living things needed to survive (sun, temperature, water, salt water, fresh water, heat, protection, etc.) Behavior: When and how it reproduces, mating rituals, hibernation, defense mechanisms, different parts of the tree ...
Effect of Reproductive Rate on Minimum Habitat Requirements of
Effect of Reproductive Rate on Minimum Habitat Requirements of

... across species (Kareiva and Wennergren 1995, Bascompte and Sole 1996, Doncaster et al. 1996, Gibbs 1998, With and King 1999, Fahrig 2001; C. H. Flather, M. Bevers, E. Cam, J. Nichols, and J. Sauer, unpublished manuscript). Modeling studies suggest that it depends on landscape factors such as the qua ...
Domestic Ferret
Domestic Ferret

... Ferrets are illegal to keep as pets in California. The local environment could provide all the necessities for ferrets to establish viable populations if released by irresponsible pet owners. If this were to happen, ferrets would become an invasive species, which mean that they would negatively affe ...
Ecological benefits of the temporary nature concept
Ecological benefits of the temporary nature concept

... overall population afterwards is not smaller than before temporary nature. Destruction can have a more far-reaching negative impact on species that choose temporary nature for reproduction. Destruction should not be done during the breeding season, or breeding should be actively avoided before destr ...
advice relevant to the identification of critical habitat
advice relevant to the identification of critical habitat

... mouth of the Sound, especially the southeast side, for the winter where a recurring polynia forms each year. The southeast polynia may help belugas avoid entrapment, a potentially important source of mortality, as the ice forms over almost the entire Sound but remains lighter in that area. In mid-wi ...
Estuary and Marine Waters Indicators Workshop
Estuary and Marine Waters Indicators Workshop

... accompanied by changes in landuse. Where this land conversion occurs will affect local water quality and habitat ...
Population Dynamics - juan
Population Dynamics - juan

... small number of individuals to a larger number of individuals that are ultimately limited by the environment • The logistic equation takes into account the carrying capacity of the environment: dN/dt = rN [(K − N)/K] • The element [(K − N)/K] reflects decline in growth as population size approaches ...
Rethinking patch size and isolation effects: the habitat amount
Rethinking patch size and isolation effects: the habitat amount

... Is the species–area curve across habitat patches steeper (like the curve for islands) or shallower (like the curve for sample areas within continuous habitat)? If the latter, we can hypothesize that the species–area curve for habitat patches primarily results from the sample area effect, where large ...
Ecological Considerations in the Design of River and Stream
Ecological Considerations in the Design of River and Stream

... population density. These dispersing individuals maintain gene flow among populations and may supplement populations where recruitment is unable to keep pace with the loss of individuals. For many small species (especially invertebrates), dispersal of individuals provides a mechanism for colonizing ...
The Scottish Beaver Trial – The effects of beavers on Atlantic
The Scottish Beaver Trial – The effects of beavers on Atlantic

... as the most vulnerable lichen habitat within the Scottish Beaver Trial (SBT) area. Other lichen habitats were scoped out of detailed monitoring because the risk of beaver impact was judged to be low. Atlantic hazel supports two globally restricted lichen communities called the Lobarion and Graphidio ...
urbanization
urbanization

... human population requires to produce the resources it consumes and to absorb its wastes • A larger, more intensively used area is needed to support urban areas • Urban footprints can be highly dispersed: Chicago’s famous pizza – cheese from Wisconsin – flour from Kansas – oven from Japan ...
07_PopBio
07_PopBio

... in a population may change over time. 3. Understand the different types of population growth curves 4. Understand the difference between Kselected and r-selected species ...
Managing Wildlife Habitat on Public Open Space
Managing Wildlife Habitat on Public Open Space

... requiring months or years to implement. ...
Link
Link

... growth rate over the time period (Varley et al., 1973) which limits population growth. Density dependence is best fit to data with high rates of population increase, and thus was found only with the Metepeira species in the data set. The carrying capacity was increased in the Ecolab model projection ...
-portal.org Ecology and Evolution
-portal.org Ecology and Evolution

... and Saura 2006) estimates the habitat reachability in a landscape based on the maximum Euclidean dispersal distance of a focal species. By calculating how much IIC decreases following a hypothetical loss of any habitat patch, the relative importance of a focal patch (dIIC) in a habitat network is es ...
Centrostephanus rodgersii on shallow subtidal
Centrostephanus rodgersii on shallow subtidal

... species) declined in patches from which all large 1986 and March 1987. Changes in area of each Centrostephanus rodgersii had been removed (Fig. 1). patch are presented as percentage of original size. At the end of the experiment, the combined cover of Sizes of patches from the Removal treatment were ...
EXTRA-ORDINARY WILDLIFE SpEcIAL ADApTATIONS
EXTRA-ORDINARY WILDLIFE SpEcIAL ADApTATIONS

... are the only marine mammal species found solely in U.S. waters. As adults, they have dark gray backs and light colored bellies. While they usually hunt in shallow reefs, they’re known to dive over 300 meters to capture prey. Like many seals, Hawaiian monk seals exhibit bradycardia—their heart rate s ...
Using Ecological Land Classification
Using Ecological Land Classification

... size of a given species (Andren, 1994). With this and other relevant literature, it is safe to assume that increased habitat fragmentation and isolation of patches directly correlates to a decline in the population of the species. Patch occupancy remains a large problem for species however. Most spe ...
Rahilly-Gravelly Rangeland Health Assessment
Rahilly-Gravelly Rangeland Health Assessment

... The deer, elk, and pronghorn populations are healthy and increasing in number within the allotment - habitat quantity and quality do not appear to be limiting population size or health. Coyote predation is thought to be depressing mule deer recruitment; however, populations continue to fluctuate at, ...
Megan Lloyst - Ontario Chapter of the American Fisheries Society
Megan Lloyst - Ontario Chapter of the American Fisheries Society

... currently lives in the Kawartha Lakes region. Megan is looking for an opportunity to become more involved in the AFS-OC as the eastern regional representative. Megan is an aquatic ecologist with over 5 years of experience working in academia, government agency sectors and the private natural resourc ...
Chapter 53 Practice Multiple Choice
Chapter 53 Practice Multiple Choice

... populations' size stable. b. Young reproductive males tend to stay in their home population and are not driven out by other territorial males. c. These immigrants provide a source of genetic diversity for the other populations. d. Those individuals that emigrate to these new populations are looking ...
organisms and populations
organisms and populations

... During the course of evolution, the costs and benefits of maintaining a constant internal environment are taken into consideration. Some species have evolved the ability to regulate, but only over a limited range of environment conditions, beyond which they simply conform. If the stressful external ...
Bulletin of the College of Science, University of the Ryukyus
Bulletin of the College of Science, University of the Ryukyus

... community structure of small animals associated with patches of the mussel Mylilus edulis. ...
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Source–sink dynamics

Source–sink dynamics is a theoretical model used by ecologists to describe how variation in habitat quality may affect the population growth or decline of organisms.Since quality is likely to vary among patches of habitat, it is important to consider how a low quality patch might affect a population. In this model, organisms occupy two patches of habitat. One patch, the source, is a high quality habitat that on average allows the population to increase. The second patch, the sink, is very low quality habitat that, on its own, would not be able to support a population. However, if the excess of individuals produced in the source frequently moves to the sink, the sink population can persist indefinitely. Organisms are generally assumed to be able to distinguish between high and low quality habitat, and to prefer high quality habitat. However, ecological trap theory describes the reasons why organisms may actually prefer sink patches over source patches. Finally, the source-sink model implies that some habitat patches may be more important to the long-term survival of the population, and considering the presence of source-sink dynamics will help inform conservation decisions.
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