A group of ecologists want to test if an industrial effluent affects the diversity of aquatic invertebrates in a river. To do this, they compare the community of aquatic invertebrates between two sites: one upstream of the effluent and one downstrean of the effluent. Which variable should they calculate to compare the diversity of the two communities of invertebrates?
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- QUESTION 3 Below are 12 statements related to an ecological succession. Read through the list and place the numbers in thg text boxes, in the appropriate section of the Venn diagram. 1. 2. No previously existing life. 3. Occurs after a storm. 4. A climax community eventually forms at the end. 5. Triggered by a fire 6. Starts as the result of a receding glacier 7.. Previously existing life in habitat. 8. Features pioneer species. 9. Starts in a lake with sediment and a community. 10. Starts on bare rock. 11. Pioneer organisms form soil. 12. Happens relatively slowly. 13. Happens relatively quickly Primary succession Secondary successionQUESTION 45 Cultural eutrophication occurs when humans ____. a. Accept the degraded condition of aquatic ecosystems b. alter marine food webs by overfishing throughout the ocean c. allow excessive nutrients from urban and agricultural areas to enter lakes d. disconnect people from their environment e. clear forest land for urban expansion and agricultural useQUESTION 3 a) Discuss briefly on secondary productivity in an ecosystem.
- Question 3 The introduction of the wolf caused a trophic cascade which had a(n) effect on the growth of aspens? O negative indirect O direct O unrecognizable A Moving to another question will save this response. f5 esc IOI @ & 4. 6. 8. W Y A S D F #3QUESTION 1 Match the following statements on the left with the correct type of fallacies on the right: What Americans need is patience. A water well goes A. Amphiboly dry. Nature replenishes it by sending a good rain. B. Equivocation Nature shall replenish the great reservoirs. Scientists say it takes a few million years. All we need C. Accent is patience. oil The fund has a deficit of $57,000, which will be used to pay teachers' salaries. We have the finest politicians money can buy. Volkswagen does it again. A National Theatre is worth having for the sake of the National Soul. (George Bernard Shaw) I hope you will stay for lunch. Click Save and SubmitWhat if we were able to restore some critical salmon habitat, like the forests surrounding the spawning streams? To test this restoration, increase K to 40,000 fish. What would that do to the MSY value? [ Select ] Does this mean you would be able to harvest more or less fish? [ Select ]
- Question 2 A species that has a disproportionately large influence on the structure of its community relative to its abundance or size is considered a O Keystone species O bottom-up control O climax species O resilient species A Moving to another question will save this response. 4. 6. 8. Q W T Y A S D # 3MD Question 8 The drought in California is not related to climate change. True FalseQUESTION 3 (a) What is resource partitioning? (b) Fully describe an excellent example of resource partitioning. Samsung Triple Camera Shot with my Galaxy A03s
- Question 3 Part 1: Biological invasions have proliferated in recent decades because of increased rates at which species are transported beyond their native range, primarily due to what process: A. human actions B. natural selection C. natural disturbance regimes D. global climate change Question 3 Part 2: Many invasive species come from industries based on the trade of (often) non-native species, including horticulture and the pet trade. Regulations targeting these industries that would successfully reduce the incidence of new biological invasions would most likely focus on which invasion stage from the framework of Blackburn et al. (2011)? A. Introduction B. Transport C. Establishment D. SpreadQuestion 13 Which of the following statements about secondary succession is TRUE: A It leads to a stable, persistent climax community. B It typically begins with lichens. C It reaches completion in about 15 years. D It occurs in areas lacking vegetation where soil is present. Question 14 Trees of the same species in a dense forest must compete for available sunlight. This is an example of A intraspecific competition. B interspecific competition. predation. D mutualism. Question 15 Which of the following is a true statement about niches? (A) A realized niche is usually larger than a fundamental niche. B An organism's niche includes its habitat and role in the community. An organism's niche is inflexible. D Ecological niches exclude abiotic factors.QUESTION 12 Various plant species provide value as food crops, fuelwood, lumber, paper from trees, and useful scientific knowledge. What term best describes this type of value? a. Economic services b. Bioprospecting potential c. Value for ecotourism d. Ecologic provisions e. Natural benefits