Endangered Species: Test Your Understanding
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What is the single greatest threat to species around the globe?
Habitat destruction is the single greatest threat.
What is an invasive species?
Invasive species are species that, when introduced to a new range or environment, will establish them-
selves and outcompete native species.
What international strategies are in place to protect endangered species?
The Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) protects
endangered species from trade that depletes populations in the wild. In addition, the International
Union for Conservation of Nature and Natural Resources (IUCN) identifies which species are in danger
of extinction, and initiates international programs to protect those species.
Critical Thinking: Which environment would you expect to have the highest number of endangered spe-
cies: a desert island or a continental tropical rainforest? Why?
Sample answer: Although islands are associated with large numbers of rare species, a tropical environ-
ment would have more natural resources and environments to support a variety of habitats and spe-
cies, and thus have a higher species diversity than in desert environments. Thus, a tropical rainforest
would be likelier to have more endangered species than a desert island.
Critical Thinking: Could an endangered species ever be considered an invasive species? Why or why not?
Sample answer: Most likely, no. Endangered species are defined by their low numbers and limited
regions that support their existence, while invasive species thrive in many different environments and
often prey on endangered species.
Critical Thinking: How might designated parks or green spaces within urban environments help protect
native species in that area?
Sample answer: If parks or undeveloped spaces designated for species are maintained, it could allow
for greater species survival. However, human endeavors must be monitored in these regions to prevent
unforeseen human-caused impacts to the residing species.
