The terms chain, corridor, and patch are associated with landscape ecology, relating to how different ecological elements like areas (patches), linear features (corridors), and connections (chains) form patterns and networks in a landscape.
The question seems to be concerned with the concepts of landscape ecology, particularly the terms chain, corridor, and patch, likely within the context of how these landscape elements interact to form ecological networks or patterns across a region.
In landscape ecology:
A patch is an area that differs from its surroundings and is somewhat homogeneous in nature.
A corridor is a linear landscape element that provides connectivity, often facilitating the movement of species and energy between patches.
The term chain could refer to a series of patches or corridors linked together, forming a network across the landscape.
Reason is likely included as a typo or irrelevant part of the question but in general, it refers to the cause or explanation behind phenomena in various contexts, including in landscape ecology.
The question probable may be:
What are the key concepts in landscape ecology, specifically regarding the terms patch, corridor, and chain? How do these elements contribute to the formation of ecological patterns and networks across a landscape?