Biodiversity Conservation And Wild Life Question 124
Question: Exotic species:
Options:
A) are often endangered.
B) usually increase biodiversity.
C) often enhance the habitat for native species.
D) usually reduce biodiversity.
Show Answer
Answer:
Correct Answer: D
Solution:
Exotic species, also known as alien species, are organisms that are introduced into areas outside of their native ranges. The introduction can be either intentional or accidental.
The correct answer is D) usually reduce biodiversity. Here’s why:
A) are often endangered: This is not necessarily true. While some exotic species may become endangered, many thrive in their new environments, often to the detriment of native species.
B) usually increase biodiversity: This is generally not true. While the introduction of a new species does increase the number of species in an area (species richness), it often leads to a decrease in biodiversity overall. This is because exotic species can outcompete native species for resources, leading to a decrease in the abundance and diversity of native species.
C) often enhance the habitat for native species: This is generally not true. Exotic species can significantly alter habitats, often in ways that are detrimental to native species. For example, they can change the structure of ecosystems, alter nutrient cycles, and introduce new diseases.
D) usually reduce biodiversity: This is generally true. As mentioned above, exotic species can outcompete native species for resources and alter habitats, both of which can lead to a decrease in biodiversity.
So, while exotic species can have varied impacts depending on the specific species and the ecosystem into which they are introduced, they usually reduce biodiversity in their new environments.
Therefore, the correct answer is D) usually reduce biodiversity. It’s important to note that managing the introduction and spread of exotic species is a critical component of biodiversity conservation efforts globally.
BETA
