Aliasing shelves → shelf
Link to alias

Reason:

shelves (69 posts) is the plural version of shelf (471 posts). shelving (1 post) is also a variation for the object shelf.

Also, bookshelf is a specific variant of shelf.

Tag Alias:

• shelves -> shelf
• shelving -> shelf

Tag Implication:

• bookshelf -> shelf

EDIT: The tag alias shelves -> shelf (forum #271410) has been approved by @bitWolfy.