Two different species of blackbird both breed in marshland habitats. Male red-winged blackbirds set up territories in the marshland early in the Spring. As the season progresses, the more aggressive tri-colour blackbirds move in and take over the best territories and force the red-winged blackbirds to choose the leftover habitats.The entire marshland is BEST defined as the red winged blackbird’s:

Question

BlackTom AI · Accepted Answer

To analyze the question, we need to recall the ecological distinction between a species' niche concepts and how competition shapes where a species can occur.
Option a: 'niche.' This is a general term for the role or position of a species within an ecosystem, including its use of resources and interactions. However, it does not specify whether we are talking about the potential or the actual space a species could occupy, so it’s too vague here.
Option b: 'ecological niche.' This phrase is essentially synonymous with the niche concept in ecology, describing the set of environmental conditions and resources that allow a species to survive and reproduce. Like option a, it does not explicitly distinguish between potential and actual occupancy in the presence of competitors, making it an incomplete descriptor for the scenario described.
Option c: 'realised niche.' The realised niche is the portion of the fundamental niche that a species actually occupies after accounting for biotic interactions, such as competition, predation, and mutualisms. In this scenario, aggressive tri-colour blackbirds displace red-winged blackbirds from prime territories, reducing the red-winged birds' actual habitat availability. Therefore, the marshland that remains suitable but not necessarily used reflects the realised niche being squeezed by competitors.
Option d: 'fundamental niche.' The fundamental niche represents the full range of environmental conditions and resources a species could potentially exploit in the absence of competitors or other limiting factors. The question states that the entire marshland is BEST defined as the red winged blackbird’s area before competition occupies the space, which aligns with the fundamental niche concept as the potential habitat for the species.
In summary, options a and b do not specify the potential versus actual occupancy; option c describes the actual, reduced habitat due to competition (the realised niche); option d correctly points to the full potential habitat the red-winged blackbird could occupy in the absence of competitors, i.e., the fundamental niche.

类似问题

The environmental conditions in which an organism lives is its Blank ______.

Which from below best describes the concept of ecological niche?

Niche diversification is the result of cooperation between species.

Which of the following can be used to define niche?

What type of niche do we observe when walking through the forest?

Match the correct term from the famous studies on barnacle competitive interactions between two species. 1: When the barnacle Chthamalus lives only in the upper intertidal zone. 2: When the barnacle Chthamalus lives in both the upper and middle intertidal zones.

The difference fundemental niche and realized niche is that

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单