"To protect that zone" means to take actions or measures to ensure the safety or security of a particular area or space from potential harm or threats. Full definition
This is going to protect the zone against the claims or the lawsuits, which is related with the property of somebody else, which is damaged. (kirsteininsurance.com)
Munkhbayar and members from his organization United Movement of Mongolian Rivers and Lakes (UMMRL), together with 11 other NGOS, were protesting government attempts to weaken the «Law to prohibit mineral exploration and mining at headwaters of rivers, protected zones of water reservoirs and forested areas,» informally known as «the law with the long name» or LLN. (goldmanprize.org)
Unlike electrofishing, the method does not impact the fish fauna and can consequently be used in protected zones and breeding grounds. (sciencedaily.com)