What Scarborough nature reserve plan means for South China Sea

A marine area designated as a nature reserve under Chinese law is broadly equivalent to what is known internationally as a marine protected area – the establishment of which is a growing global trend. Supporters see the move to protect Scarborough Shoal’s fragile reef as evidence of Beijing’s readiness to assume its environmental responsibilities and integrate ecological priorities into maritime governance.

In the South China Sea region, government reactions vary. None of the other claimant states – Vietnam, Malaysia, Indonesia and Brunei – has made any official statement. The silence may reflect caution: jurisdictional implications aside, ecological protection is a goal hard to oppose.

Under the UN Convention on the Law of the Sea, all states have a duty to protect and preserve the marine environment. Historically, environmental initiatives have proceeded amid jurisdictional uncertainty. In the Mediterranean, for example, coastal states have created a network of marine protected areas despite unsettled boundaries. In the Southern Ocean, the Antarctic Treaty System has designated large marine sanctuaries through consensus, despite the absence of recognized sovereignty.

Whether a Scarborough Shoal nature reserve can join the list of constructive precedents will depend on the initiative’s transparency, scientific grounding and adherence to recognized standards.

It is not urgently necessary to revisit the entrenched debates over sovereignty, jurisdiction or the legitimacy of historical claims in the South China Sea. The more pressing question is whether initiatives like the Scarborough reserve can be reframed as opportunities to ease, rather than exacerbate, tensions. Can environmental stewardship help build confidence? Might ecological concerns provide common ground for dialogue amid territorial disagreements?

One avenue is joint scientific research. If China were to invite scientists, including from Southeast Asia, to join ecological surveys and monitoring within the proposed reserve, it would enhance transparency and credibility. Collaborative data collection on coral health, fish stocks and pollution could provide a factual basis for sustainable management.

Of course, trust deficits run deep after years of maritime stand-offs. Manila views any new Chinese measure as a disguised assertion of sovereignty. For China, inviting joint management may be seen domestically as a compromise of control. Yet history suggests functional cooperation can coexist with unresolved disputes.

For instance, the US and Soviet Union collaborated on environmental and scientific initiatives despite the Cold War. In 2018, Arctic and non-Arctic states agreed to a fisheries moratorium in the Central Arctic Ocean amid broader geopolitical strains.

The implications of a Scarborough reserve therefore extend beyond its modest geographical scope. If implemented unilaterally, with increased patrols and limited access, it may reinforce perceptions of exclusion and exacerbate mistrust. But if developed transparently, with space for dialogue and scientific collaboration, it could serve as a pilot for cooperative conservation in contested waters. Either trajectory will shape the regional narrative: is China using environmentalism as a veneer for control, or as a genuine opening for cooperation?

The broader lesson is the South China Sea need not remain trapped in a circle of zero-sum competition. Conservation is one of the few areas where interests converge: all littoral states depend on healthy fisheries, resilient reefs and clean waters. Climate change and pollution are shared threats that transcend national boundaries. By thinking creatively, governments could transform initiatives like the Scarborough reserve from symbols of rivalry into platforms for stewardship.

Ultimately, the reserve is both ecologically significant and politically sensitive. Its meaning will be defined less by Beijing’s decree than by how it is implemented and whether stakeholders seize the opportunity for constructive engagement. For a region too often associated with confrontation, framing Scarborough Shoal as a space of shared responsibility rather than exclusive control could mark a modest but meaningful step towards a more stable maritime future.