In this blog you will find the correct answer of the Coursera quiz Ecology: Ecosystem Dynamics and Conservation Coursera Week 4 mixsaver always try to bring the best blogs and best coupon codes
Module Four: What have you learned?
Which of the following is NOT an abiotic component of ecosystems?
- population dynamics
- nutrient availability
- natural disturbances
Energy most frequently enters an ecosystem as:
- heat, during processes such as cellular respiration
- solar radiation
What percent of the solar energy that reaches plants (primary producers) is reflected or passes through them without being absorbed?
- less than 1%
On average, 100 kg of plant material can support approximately:
- 10 kg of herbivore biomass and 1 kg of carnivore biomass
- 1 kg of herbivore biomass and 10 kg of carnivore biomass
- 10 kg of herbivore biomass and 5 kg of carnivore biomass
- 5 kg of herbivore biomass and 1 kg of carnivore biomass
Found in limited supply, both __________________ and ___________________ are elements needed for the growth and reproduction of primary producers because they are the building blocks of many critical biochemicals.
- carbon; phosphorus
- oxygen; phosphorus
- nitrogen; amino acids
- nitrogen; phosphorus
Categories of concern where human activity currently exceeds planetary boundaries (according to the Stockholm Resilience Center) include:
- biochemical flows and freshwater use
- biodiversity loss and land-system change
- climate change and ocean acidification
- biodiversity loss and freshwater use
A study which showed that the more diverse grasslands within Yellowstone National Park were more resistant and experienced less changes in plant species composition illustrates:
- the Diversity-Stability Hypothesis
- ecosystem resilience
- ecosystem function
- ecosystem services
According to the Millenium Ecosystem Assessment, pollination is an ecosystem service that can best be classified as a:
- supporting service
- regulating service
- provisioning service
- cultural service
Payments for Ecosystem Services (PES) offer incentives for landowners or stewards to restore or maintain ecosystems and one or more of the services they provide. What types of concerns exist about these programs?
- Equity concerns: who is benefiting from these programs and are all stakeholders being considered?
- Ethical concerns: every species has an intrinsic right to exist and the fate of our resources should not depend on market fluctuations.
- Accuracy concerns: monetary assessments vary widely, depending on what is being assessed and who is doing the assessment.
- All of the above
A tropical forest is valued:
- differently depending on the audience
- for food and medicinal resources it provides
- for its spiritual significance
- for the market value of its timber
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