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Ecosystems
Ecosystems

... drought that turned grasslands into dust. How did this change most likely affect populations of insects living among the grasslands? A. They adapted to eat dust instead of grass. B. They decreased because the resources they needed were not available. C. They increased because other populations were ...
The habitat condition data dictionary
The habitat condition data dictionary

... Limiting factor lists mix ecological processes operating over a wide variety of spatial and temporal scales ...
Western Pond Turtle (Actinemys marmorata)
Western Pond Turtle (Actinemys marmorata)

... Habitats used by western pond turtles may have a variety of substrates including solid rock, boulders, cobbles, gravel, sand, mud, decaying vegetation, and combinations of these. In many areas turtles are found in rocky streams with little or no emergent vegetation. In other areas they occur in slow ...
Ecology - Scarsdale Schools
Ecology - Scarsdale Schools

... Biotic Factors: living things or their materials that directly or indirectly affect an organism in its environment. This would include organisms, their presence, parts, interaction, and wastes. ...
Chapter 52~53: Population and Community Ecology
Chapter 52~53: Population and Community Ecology

... 7. Explain how carrying capacity of the environment affects the intrinsic rate of increase of a population 8. Explain how density dependent factors affect population growth 9. Describe how weather and climate can function as density-independent factors in controlling population growth 10. Explain ho ...
Document
Document

... Including environmental influences on population _______________________and __________________________, ______________________________, and variations in population size The fur seal population of St. Paul Island, off the coast of Alaska is one that has experienced dramatic fluctuations in size Conc ...
Chapter 45 Population Ecology Ecology: Overview: Earth`s
Chapter 45 Population Ecology Ecology: Overview: Earth`s

... Including environmental influences on population _______________________and __________________________, ______________________________, and variations in population size The fur seal population of St. Paul Island, off the coast of Alaska is one that has experienced dramatic fluctuations in size Conc ...
a haunting legacy from isoclines: mammal
a haunting legacy from isoclines: mammal

... Many of OUf concepts about species coexistence are rooted finnly in the analysis of competitor isoclines whose slopes estimate the average magnitude of competition. Realistically, competition will vary among habitats, and habitat selection will be a major contributor to coexistence. Competition will ...
THE AMPHIBIAN DECLINE LESSON PLAN
THE AMPHIBIAN DECLINE LESSON PLAN

... In the U.S. less than one fourth of native vegetat ion still remains in many parts of the eastern and mid-western states, and only 15% of land area rem ains unmodified by human activities in all of Euro pe. The islands suffering extreme habitat destruc tion include New Zealand, Madagascar, the Phili ...
Intertidal Mudflats
Intertidal Mudflats

... Mudflats are sedimentary intertidal habitats created by deposition in low energy coastal environments, particularly estuaries and other sheltered areas. Their sediment consists mostly of silts and clays with a high organic content. Towards the mouths of estuaries where salinity and wave energy are h ...
Last Ark Tour - Potter Park Zoo
Last Ark Tour - Potter Park Zoo

... more about Massasauga rattlesnakes in Michigan. She puts transmitter chips into snakes found in the wild, and they are then returned to where they were found. These chips allow researchers to learn more about the snakes’ population, movement, deaths, etc. Zoo Atlanta and Knoxville Zoo have been amon ...
File
File

... What is meant by a population? A group of individuals of the same species living together in a habitat Explain what is meant by competition. When organisms of the same or different species ‘fight’ for necessary resources that are in short supply. ...
to view - Scottish Natural Heritage
to view - Scottish Natural Heritage

... Very little information exists for the bivalves present in this community, with no information available regarding population densities or Minimum Viable Populations. There are also only a few locations where this search feature is known within Scotland. In most known instances (e.g. Malthus et al., ...
Populations 8
Populations 8

... • Density Independent factors- When a certain proportion of a population may die regardless of the population’s density. • This type of regulation affects all populations in some way. • Severe weather and natural disasters are often density independent causes of death. ...
Habitat Bottlenecks and Fisheries Management
Habitat Bottlenecks and Fisheries Management

... protected from strong winds and surf which disrupts the mating process. High quality beaches are composed of a sand/pebble mixture optimal for incubating horseshoe crab eggs in terms of aeration and moisture. From Massachusetts to Delaware, productive spawning beaches are typically coarse-grained an ...
Ecology Unit - Midwest Central CUSD #191 / Homepage
Ecology Unit - Midwest Central CUSD #191 / Homepage

... Predator – found in all ecosystems and eat plants and/or animals. Predators are a type of consumer that seek out and eat other organisms. Prey – the animal that the predator eats. ...
Answers to Mastering Concepts Questions
Answers to Mastering Concepts Questions

... rates, and fishing most likely eliminated the cod in their reproductive stages. If the fish were unable to reproduce fast enough to counter their losses, the population would decline quickly. Policies that might prevent the collapse of the fishery might include overall catch limits and setting aside ...
Organisms and Populations
Organisms and Populations

... (thermoregulation and osmoregulation). Evolutionary biologists believe that the ‘success’ of mammals is largely due to their ability to maintain a constant body temperature and thrive whether they live in Antarctica or in the Sahara desert. The mechanisms used by most mammals to regulate their body ...
Ecosystems and Populations
Ecosystems and Populations

... within an ecosystem all affect one another, acting as either an energy source, or a competitor. The abiotic component is the non-biological part of an ecosystem. This includes the climate, light level and rainfall. Some abiotic factors, such as the soil, can be altered by the presence of organisms. ...
Glossary Ecology
Glossary Ecology

... NC, number of connections NS⋅NC = constant Gausse Law: The idea that if two competing species coexist in a stable environment, then they do so as a result of differentiation of their realized niches; but if there is no such differentiation, or if it is precluded by the habitat, then one competing sp ...
HS Biology Ecosystems and Succession
HS Biology Ecosystems and Succession

... within an ecosystem all affect one another, acting as either an energy source, or a competitor. The abiotic component is the non-biological part of an ecosystem. This includes the climate, light level and rainfall. Some abiotic factors, such as the soil, can be altered by the presence of organisms. ...
Organisms and Populations.pmd
Organisms and Populations.pmd

... (thermoregulation and osmoregulation). Evolutionary biologists believe that the ‘success’ of mammals is largely due to their ability to maintain a constant body temperature and thrive whether they live in Antarctica or in the Sahara desert. The mechanisms used by most mammals to regulate their body ...
Population - Plain Local Schools
Population - Plain Local Schools

... the difficulty predicting future birth and death rates of various countries C. The question remains whether or not Earth will have the capacity for the human population ...
ecology ppt
ecology ppt

... Density Dependent Factors Competition occurs… • When populations become crowded, organisms compete for food, water space, sunlight and other essentials. • among members of the same species • between members of different species. –This type of competition can lead to evolutionary change. ...
Evolution of Predator and Prey Movement into Sink Habitats
Evolution of Predator and Prey Movement into Sink Habitats

... levels only if the predator has some (but not too much) fitness advantage (e.g., lower mortality rate) in the sink habitats for the prey. Collectively, these scenarios allow us to understand when dispersal into sink habitats evolves and when dispersal polymorphisms evolve at one or multiple trophic ...
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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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