Create a chart to compare and contrast density-dependent factors and density-independent factors. Include the following: the size of population affected if it is biotic or abiotic a minimum of three examples of each of the factors Density-Dependent Factors Density-Independent Factors Size of Population Affected Biotic or Abiotic? Examples
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Create a chart to compare and contrast density-dependent factors and density-independent factors. Include the following:
- the size of population affected
- if it is biotic or abiotic
- a minimum of three examples of each of the factors
Density-Dependent Factors | Density-Independent Factors | |
---|---|---|
Size of Population Affected |
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Biotic or Abiotic? |
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Examples |
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Solved in 3 steps
- Which of the following is NOT true regarding population density? As population densities increase, density dependent factors increase in influence on the population. The crude density, or number of organisms per unit area, is a good indicator of where those organisms will be found in the landscape. Population densities can be useful to wildlife managers trying to maintain game populations as a renewable resource. Population densities can fluctuate overtime given their interactions among trophic levels.Read and highlight ways limiting factors affect the population growth Examples of how limiting factors affect population growth Abiotic (nonliving) limiting factors include things like wildfire, hurricanes, pollutants, droughts, floods and seasonal climate extremes. These factors limit all populations in a given area regardless of the size of the population. For example, a wildfire that sweeps through a dense forest in the Everglades has a big impact on every population in the ecosystem, regardless of how big the population is. Limiting factors can also be biotic-having to do with living organisms. Competition and predation are examples of biotic living factors. Organisms compete for available resources like food, water, and shelter. If the resources are plentiful then the populations can increase because there is less competition. If the resources are decreased in an area, competition increases and population size decreases. For example Mountain chickadees (Parus gambeli) compete for…Categorize the following density-dependent factors by their cause and effect. The four categories are natural/catastrophic, natural/gradual, human-made/catastrophic, and human-made/gradual. A contagious virus that causes death in forty-eight hours strikes a small population of frogs that lives in a small pond. A population explosion of mayflies in a small corner of a lake brings increased predation by dragonflies. The building of a large vacation resort results in the clearing of several acres of land, degrading the habitat of a large population of plants living on those acres. An accidental leak of biohazardous material introduces a bacteria that slightly decreases reproductive capability of a small population of songbirds living near the leak.
- Give an example of how density-dependent and density-independent factors might interact.Which of the following methods will provide information to an ecologist about both the size and density of a population? a. mark and recapture b. mark and release c. quadrat d. life tableCategorize the following density-independent factors by their cause and effect. The four categories are natural/catastrophic, natural/gradual, human-made/catastrophic, and human-made/gradual. A volcanic explosion results in lava flow over five square miles where a population of rare orchids lives. A vernal pool driesup a few weeks earlier than normal, impacting a population of spotted salamanders that used the pool to breed earlier in the season. A toxic chemical spill directly into a lake kills eggs, small fry, and all females in a dense population of bass. An increase in demand by humans increases harvesting of shrimp by people in the fishing industry.
- The length of a food chain is limited by the efficiency of the energy transfer along the chain. According to the Energetic hypothesis, what is the percentage of the energy stored in the organic matter of each trophic level that is converted to organic matter at the next trophic level. 10% 20% 50% None of these answers Among the four statements which ones reflect density-dependent regulation of population size? 1. A population of mice in a barn declines because a farmer has acquired two cats. 2. Mosquitos disappear from.an area after the first frost. 3. A lethal virus spreads more rapidly in cities than in rural areas. 4. Winds from a hurricane breaks down all the willow trees on the shore of a lake. 2, 3 and 4 2 and 4 1 and 3 1 and 2 and 3 ... e...The growth of a population of natural resources (such as hardwood trees) over time is illustrated by the graph. Two significant pieces of information are included: the environment's carrying capacity and the maximum sustainable yield. The environment's carrying capacity is the point at which all available resources are being used by the organisms in the population, and the maximum sustainable yield is the point at which the highest number of the population are being harvested without impairing the populations' growth. (see pic.) Identify the assumptions about population growth that are implicit in the figure. (multiple answers can be chosen.) A) The environment's carrying capacity does not change over time due to any increase or decrease of resource availability. B) The population grows logistically until it nears the environment's carrying capacity and does not diverge from this rate over time. C) The maximum sustainable yield grows logistically until it reaches the…Find a reference to the carrying capacity of Earth (for humans). It needs to be some estimate of the number of people that scientists estimate the earth can support. Note: this is NOT an estimate of what the population will be in the future; but rather what the earth is predicted to be able to support. BE CREATIVE and search more than one source. You will not receive credit if your summary covers the fırst article I see when I google this topic. In Canvas provide: • The estimated carrying capacity • Group/researcher who reported this estimate • How the group/researcher estimated carrying capacity (what variables were used) • Whether you think this is a reasonable estimate, and why or why not. The url for the article you are referencing
- What is the relationship between population density and available resources? exponentially proportional There is no relationship. directly proportional inversely proportionalAn ecologist studies three populations within an ecosystem. Each population has an identical intrinsic growth rate (r max = 0.5). The population sizes and carrying capacities are shown in the graph. 1000 900 800 700 600 500 400 300 200 100 ㅇ A Population 1 Size - Carrying capacity What is the growth rate of Population C? NumberWhich of the following is the term used to describe the downward pressure that the environment places on a population’s growth? Select one: Carrying capacity None of the above are correct Biotic potential Environmental resistance