Q: What is a keystone species? Describe an example.
A: Introduction An ecosystem deals with both biotic and abiotic factors and their interaction with…
Q: How can the loss of biodiversity be prevented?
A: Answer: Introduction: Biodiversity means the entire plant species, animal species, and ecosystems in…
Q: Where is exponential growth by a plant population more likely—in an area where a forest was…
A: The increasing pattern of population size when there is no limit of nutrients, so this type of…
Q: Why do managers try to maintain populations of fish and game species at about half their carrying…
A: A population consists of organisms belonging to the same species and occupying a common region. The…
Q: What are 4 mutualistic and 4 antagonistic interaction between two or more species that are exploited…
A: Four mutualistic interactions- 1. Aphids and ants- Aphids are sap-sucking insects that exude…
Q: Define sustainable development. What is meant by the triple bottom line? Why is it important to…
A: Humans have affected nature on a large scale.
Q: What conditions produce an inverted pyramid of biomass in which the consumers have a greater biomass…
A: A population is a group of species that inhabit the same area and live together. The individuals of…
Q: What is the greatest cause for threatened species?
A: One of the major cause of the threatened species os the loss of habitat. Destruction of Habitat is…
Q: Primary productivity varies from ecosystem to ecosystem.Explain?
A: An ecosystem is a large community of living organisms in a specific area in which the biotic and…
Q: When population of species begins declining rapidly, the species is said to be?
A: International union of conservation of nature and natural resources (IUCN) or world conservation…
Q: Based on its primary productivity, which terrestrial ecosystem or life zone is able to produce the…
A: Ecosystem is a geographical area that consists of all the organisms dwell together. The ecosystem of…
Q: Is Sustainable Development Goal realistic or idealistic? Why or why not? Give examples that support…
A: The UN's Sustainable Development Goals (SDGs), which supplant the Millennium Development Goals…
Q: What is a keystone species? How can a keystone species within a community be identified?
A: A keystone species is the one which has an important influence on maintaining the structure of an…
Q: Species with limited resources usually exhibit a(n)________ growth curve.a. logisticb. logicalc.…
A: THE NUMBER OF INDIVIDUAL OF A PARTICULAR SPECIES THAT A PARTICULAR ENVIRONMENT CAN SUPPORT IS CALLED…
Q: What is not observed in biodiversity hotspots?
A: A biodiversity hotspot is a significant bio-geographical spot or reservoir or bio-geographical area…
Q: What are the five primary causes of biodiversity loss? Give one specific example of each
A: Biodiversity loss is caused by five primary major factors: habitat loss: An example of such factor…
Q: The temperate regions show a lower value of primary productivity as compared to trophical…
A: An area which can be divided on the basis of physical characteristics, interaction of environment…
Q: What type of ecological pyramid would be obtained from 120g secondary consumers, 60g primary…
A: The graphical representation of the relationship between the organisms present in an ecosystem is…
Q: Which of the following would be most effective in slowing the loss of biodiversity?
A: Biodiversity is the diversity of plant and animal at all levels of biological organisation.It…
Q: Can you think of one organism not mentioned in this chapter as a keystone species that you believe…
A: Introduction An ecosystem deals with both biotic and abiotic factors and their interaction with each…
Q: species’ population dynamics
A: Population Dynamics is related to ecology ( study of living organisms with relation to environment).…
Q: What is a biodiversity hot spot?
A: The term biodiversity describes the huge variety of life forms on Earth. It is the variety and…
Q: Two alien species compete for resources on a planet far far away. Their initial populations are 100…
A: An invasive species is any living organism that is not native to an ecosystem and causes harm, such…
Q: community that has 4 trophic levels, what biomass of primary producers is necessary to maintain a…
A: Correct option: (a) 178kg/m^2 Reason: According to the 10 % Law : the energy stored in 1st trophic…
Q: What forces would be working against an equitable distribution of our resources?
A: Equitable distribution of resources among all people is the rightful distribution of resources…
Q: A community that does not undergo further succession is an apex community. True or false?
A: Introduction The process of change in an ecological community's species structure over time is…
Q: What is the impact of invasive aquatic species to the genetic diversity of wild species?
A: Invasive species are those which are introduced in an ecosystem by humans. These species are also…
Q: How did the original Endangered Species Act affect Timber Harvester stakeholders? Was it a positive…
A: The Endangered Species Act, 1973 prohibits importing, exporting, possession, sale and transport of…
Q: What are some economic applications that can be generated by very biodiverse ecosystems?
A: Biodiversity refers to several species of plants and animals living in a specific habitat,…
Q: What is the typical shape ofa population growth curve?How can the biotic potentialbe represented in…
A: A population growth curve is a graphical representation of how a particular quantity increases over…
Q: In a temperate grassland ecosystem, total primary production was 12,740 g/m"/yr. Annual net…
A: Ecology is the study of interaction of organisms with one another and with the environment. Ecology…
Q: What is an ecological footprint? Explain what is meantby the term overshoot.
A: An ecosystem is usually defined as the way they are sated as the community of living organisms that…
Q: Which of the following is a negative consequence associated with both slash-and-burn and…
A: The cultivation method that can be utilized by farmers in order to practice shifting agriculture in…
Q: What is the "climax community" for our area (Virginia, USA)?
A: Climax community is one which has reached a stable stage.
Q: If the gross primary productivity is 100 g/m2/year and the respiration rate is 37 g/m2/year what is…
A: NPP is calculated by subtracting the total amount of carbon fixed (or converted into useful…
Q: What happens to populations in a food web if there is a decrease in the amount of free energy…
A: As we know plants are only organisms which can synthesise/ produce their own food , thus they are…
Q: Why might coevolutionary interactions lead to increased broad-scale diversification rates? Give an…
A: It is a reciprocal evolutionary change in a set of interacting populations over time resulting from…
Q: Why is "carrying capacity" an important parameter for a healthy ecosystem?
A: According to the question we have to explain the reason behind "carrying capacity" is an important…
Q: What is meant by the term sustainable development?
A: The concept of sustainable development has been defined by many ways. One of the description about…
Q: In theory, with unlimited resources, a population could be expected to exhibit ____ growth.…
A: Carrying capacity is the term which describes the maximum population a place accommodate its…
Q: Why is the growth curve for most populations S-shaped?
A: A growth curve is a graph depicting the progression of an event through time. The number of…
Q: How does the success of an invasive species depend on its placement in its new food web? Explain.
A: An invasive species is an organism that causes ecological or economic harm in a new environment…
Q: How 'exponential population growth' affects in an ecosystem?
A: An ecosystem is a geographical region comprised of living (biotic) and non-living(abiotic) factors…
Q: Why can’t populations continue to grow exponentially? What “limits” thepopulation growth?
A: Lake of resources like food, water space etc population can not grow exponentially. so population…
Q: Why do K-selected species tends to be successful in a climax community? Why?
A: K selected species are the one based on k and r theory. This theory states that the the trait…
Population Growth
R and K Selection
R and K selection are concepts in ecology used to describe traits in the fluctuation of a population or population dynamics. For example, they describe the life-association traits between parent and offspring, such as quantity or number of young ones born at a time, quality of parental care, the age to maturity, and reproductive effort.
Why do some species tend to grow exponentially while others tend to follow a
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- Describe the growth at various parts of the S-shaped curve of logistic growth.Two alien species compete for resources on a planet far far away. Their initial populations are 100 and 1000 and their specific growth rate is 0.02263/year and 0.02/year and their yield coefficient is 0.95 and 0.85 respectively. When the first species begins to consume more than 50% of the resources the other population will be inevitably be annihilated. How many years does it take for this to occur? Answer:The maximum sustainable yield (MSY) is the highest rate at which a potentially renewable resource can be used indefinitely without reducing its available supply. The idea is to remove individuals while keeping the population at a constant growth rate and size, but to find the size where the harvest is maximized. The greater the growth rate, the more individuals you can remove and not change the population size. Where is the growth rate at its maximum? To find this look at your logistic model simulator. 1. Set up a hypothetical salmon population where the carrying capacity is 20,000 fish, the maximumr is 0.7. According the the maximum sustainable yield (MSY), at what population size should we maintain the salmon while fishing?
- During what phase of the growth curves in each diagram is the population just beginning to colonize an area? (C) a) Which type of population growth appears to continue unchecked? b) The growth curves in the Model are often referred to using the letters of the alphabet they resemble. The logistic growth curve is sometimes referred to as an S-curve. What letter would you use to describe the exponential growth curve? c) What causes the population to slow down during logistic growth? d) The maximum population an environment can sustain is affected by environmental factors that cause the population to level out or become stable. What term is used to describe this level of logistic growth? Diagram A-Exponential Growth Curve Population Numbers Exponential growth Lag phase Time Population Numbers Diagram B-Logistic Growth Curve Lag phase Time Carrying capacity (K) Pressure begins due to environmental resistanceWhy is "carrying capacity" an important parameter for a healthy ecosystem?Given 0.463 net reproduction per capita and a carrying capacity of 373 of a nature reserve , if 52 individuals are introduced into this nature reserve in 2011 for the first time, when will the population size reach 306 individuals?
- According to the resource-ratio hypothesis (a.k.a. R-star), what factor(s) will determine the maximum number of competing species that could possibly coexist in a community? (Note: either one or more-than-one answer could be correct) .what does the number of limiting resources in a community tell us? The number of limiting resources in the community The net primary productivity of the community (NPP). The number of trophic levels that are present in the community. | The intrinsic rate of increase (r) of each species in the community. The colonization rate of each species that can access the habitat.Why do K-selected species tends to be successful in a climax community? Why? (answer in minimum of 500 words)What conditions produce an inverted pyramid of biomass in which the consumers have a greater biomass than the producers? Can you think of an example of an inverted pyramid of numbers in which there are, for example, more herbivores than plants on which they feed?