For each statement below, write true or false. 1. The current rate of extinction is decreasing significantly. 2. Island species are especially vulnerable to extinction. 3. Only a few factors threaten biodiversity. 4. The primary cause of extinction is loss of habitat. 5. Introduced species make biodiversity stronger and more stabl

For each statement below, write true or false. 1. The current rate of extinction is decreasing significantly. 2. Island species are especially vulnerable to extinction. 3. Only a few factors threaten biodiversity. 4. The primary cause of extinction is loss of habitat. 5. Introduced species make biodiversity stronger and more stabl

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter21: Conservation And Biodiversity

Section: Chapter Questions

Problem 7RQ: What kind of ecosystem are exotic species especially threatening to? a. deserts b. marine ecosystems...

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Which of the subsequent options is not included in the red list criteria for species classified as "critically endangered"? 1. The population is projected to decrease by 25% or more within a span of 3 years or 1 generation. 2. The species possesses a limited range of less than 100km2 in a solitary location, and there is evidence of or anticipated habitat loss, fragmentation, ecological imbalance, or significant commercial pollution. 3. The likelihood of extinction exceeds 50% within a timeframe of 10 years or 3 generations. 4. The overall population size consists of fewer than 200 mature individuals.
Figure 19.6 If the major food source of seals declines due to pollution or overfishing, which of the following would likely occur? a. The carrying capacity of seals would decrease, as would the seal population. b. The carrying capacity of seals would decrease, but the seal population would remain the same. c. The number of seal deaths would increase, but the number of births would also increase, so the population size would remain the same. d. The carrying capacity of seals would remain the same, but the population of seals would decrease.
Figure 45.10b If the major food source of the seals declines due to pollution or overfishing, which of the following would likely occur? The carrying capacity of seals would decrease, as would the seal population. The carrying capacity of seals would decrease, but the seal population would remain the same. The number of seal deaths would increase but the number of births would also increase, so the population size would remain the same. The carrying capacity of seals would remain the same, but the population of seals would decrease.
What kind of ecosystem are exotic species especially threatening to? a. deserts b. marine ecosystems c. islands d. tropical forests
Certain species of parrot cannot be brought to the United States to be sold as pets. What is the name of the legislation that makes this illegal? a. Red List b. Migratory Bird Act c. CITES d. Endangered Species Act (ESA)
When the Endangered Species Act was established in 1973, the endangered and threatened species list included 78 U.S. species. In 2018, that number had risen to O 356 507 O 770 O 1,000 1,661
Protecting biodiversity 1. What characteristics make a species MORE susceptible to extinction/endangerment? (And conversely,what characteristics of a species would make it LESS susceptible?) 2. How were hunting & fishing laws an important “first step” in conserving biodiversity? 3. How is the endangered species act different from a fish/game law? 4. What important “addition” to our interpretation of what the ESA prohibits was established in 1995?
Match the following solutions to examples that address problems for biodiversity. Habitat Stewardship Fund for Species at Risk Ecological Gifts Program A Gas Guzzler Tax Mission Monarch 1. Train more scientists. 2. Financial subsidies to industries that damage the environment should end. 3. Establish payments for land managed to enhance conservation. 4. Fund NGOs to implement conservation.
Match the following solutions to examples that address problems for biodiversity. Ais-Richtersveld Transfrontier Park The Global wildlife program Haida Gwaii Watchmen Salmon recovery in Terra Nova National Park 1. Land managers have a responsibility to listen to local people's perspectives. 2. Conservation actions are difficult to coordinate between countries. 3. International organizations provide technical and financial support to developing countries. 4. Train and hire local people to work in protected areas.
The ENDANGERED ANIMAL is CA least tern and its a bird 1. Species Description Visual description, size, reproduction, lifespan, unique behaviors 2. Habitat Needs & Ecological Roles What type of habitat does it require? What does it eat? Who eats it? What role does this species play in its biological community?, etc. 3. Geographic Range/ Population Status Where is this species found geographically? How does its current range compare with where it’s distributed today? How many of these organisms are present in our region? (Or – if you can’t find overall numbers, is there data available on specific populations of this plant/animal?) 4. Reasons for Endangerment Explain the various factors that have led to this species’ current plight. Expand on these points individually, based on your species’ unique story. 5. Domino Effects As we’ve learned, species are not islands unto themselves; they are integrated with many other organisms in trophic relationships, mutualisms, competition, etc.…
1. Two predators feed on small antelope. One predator weighs 100 kg, and the other weighs 35 kg. Explain what might happen if the two predators share the same area. 2. Wolves are reintroduced into a park. As a result, the vegetation changes. Explain how the changes to the vegetation happened. 3. Find out about the niche of wolves in their community. Determine if they are a keystone species. Then, write a one-page essay describing their role in their ecosystem.
ENDANGERED ANIMAL is CA least tern bird 1-3 bases on the bird Reasons for Endangerment Explain the various factors that have led to this species’ current plight. Expand on these points individually, based on your species’ unique story. Domino Effects As we’ve learned, species are not islands unto themselves; they are integrated with many other organisms in trophic relationships, mutualisms, competition, etc. How is the absence of this species (or its lowered population size) likely to impact the other members of its habitat? (If findings specific to this point are available, please include them – otherwise, I’m asking you to speculate based on what you’ve learned about the biology of this organism.) Conservation Efforts Discuss past, current, and proposed efforts to conserve this species. Are these strategies effective? Are they realistic? What is the outlook for this organism?