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To consider how these different factors interact, populations are looked at from a variety of perspectives. Information presented and the examples highlighted in the section support concepts outlined in Big Idea 4 of the AP ® Biology Curriculum Framework.
How do population growth and age structure relate to the level of economic development in different countries? What are the long-term implications of unchecked human population growth? Connection for AP ® Courses. The methods used to look at animal population dynamics can also be used to look at the human populations.
Connection for AP ® Courses. Population ecologists use mathematical methods to model population dynamics. These models can be used to describe changes occurring in a population and to better predict future changes. Applying mathematics to these models (and being able to manipulate the equations) is in scope for AP ®.
Study with Quizlet and memorize flashcards containing terms like local regulators, example?, synaptic signaling, type of long distance signaling? and more.
- Limiting Factor Definition
- Types of Limiting Factor
- Examples of Limiting Factors
- Related Biology Terms
- Quiz
A limiting factor is a resource or environmental condition which limits the growth, distribution or abundance of an organism or population within an ecosystem. These can be either physical or biological factors which can be identified through a response of increased or decreased growth, abundance, or distribution of a population, when the factor is...
Density Dependent Factors
Density dependent factors are those factors whose effect on a population is determined by the total size of the population. Predation and disease, as well as resource availability, are all examples of density dependent factors. As an example, disease is likely to spread quicker through a larger, denser population, impacting the number of individuals within the population more than it would in a smaller, more widely dispersed population.
Density Independent Factors
A density independent limiting factor is one which limits the size of a population, but whose effect is not dependent on the size of the population (the number of individuals). Examples of density independent factors include environmentally stressful events such as earthquakes, tsunamis, and volcanic eruptions, as well as sudden climate changes such as drought or flood, and destructive occurrences, such as the input of extreme environmental pollutants. Density independent factors will usually...
Physical and Biological Limiting Factors
Limiting factors can also be split into further categories. Physical factors or abiotic factors include temperature, water availability, oxygen, salinity, light, food and nutrients; biological factors or biotic factors, involve interactions between organisms such as predation, competition, parasitism and herbivory.
Resources
Resources such as food, water, light, space, shelter and access to mates are all limiting factors. If an organism, group or population does not have enough resources to sustain it, individuals will die through starvation, desiccation and stress, or they will fail to produce offspring. In the case of photosynthesizing organisms such as plants, light is a vitally important limiting factor, essential for their growth. This is most prominent in understory plants of a forest, where photon energy f...
Environmental Conditions
Limiting factors are also present as environmental conditions. Two of the most prominent examples are temperature and precipitation; these are widely affected by the climate, and seasonal changes within the climate. The effect that each factor has on a particular organism is determined by each individual species’ life history traits. Maintaining a correct body temperature is vitally important for almost all organisms in order to perform metabolic functions effectively. With many organisms, th...
Biotic factors
As well as resource and climatic factors affecting population growth, biotic factors such as predation, herbivory, parasitism, and interspecific and intraspecific competition, are also limiting factors; these tend to be density dependent factors. Parasitism, like disease, is generally more destructive to large, dense populations because the parasite is able to effectively parasitize more individuals if they are in close contact. Within tropical ecosystems, the Cordyceps fungus is a prominent...
Resources– A substance within an environment, which is required by an organism for growth, maintenance and reproduction.Carrying Capacity– The number of populations or organisms within a population, which an environment can sustain indefinitely without environmental degradation.Fundamental Niche– The total range of environmental conditions that is suitable in order for an organism to exist, in the absence of limiting factors.Realized Niche– The actual amount of resources or environmental conditions that an organism is able to utilize within an ecosystem.1. Which of these limiting factors would be density independent? A. A food source B. Intraspecific competition C. A volcanic eruption D.Light 2. Temperature is an example of a: A. Density dependent factor B. An abiotic limiting factor C. A resource D.An environmental limiting factor 3. The carrying capacity (K), of an environment is reached when: A...
reductions of combined consumer and producer surplus associated with underproduction or overproduction of a product. Study with Quizlet and memorize flashcards containing terms like scarcity, economics, efficiency and more.
Aug 1, 2023 · The maximum stable population size of a species that an ecosystem can support is known as the carrying capacity. Every individual within a species population has the potential to reproduce and have offspring which contribute to population growth.
