Home to virgin reefs, rare sharks and vast numbers of exotic fish, the Coral Sea is a unique haven of biodiversity off the northeastern coast of Australia. If a proposal by the Australian government goes ahead, the region will also become the world’s largest marine protected area, with restrictions or bans on fishing, mining and marine farming.

    The Coral Sea reserve would cover almost 990,000 square kilometres and stretch as far as 1,100 kilometres from the coast. Unveiled recently by environment minister Tony Burke, the proposal would be the last in a series of proposed marine reserves around Australia’s coast.

    But the scheme is attracting criticism from scientists and conservation groups, who argue that the government hasn’t gone far enough in protecting the Coral Sea, or in other marine reserves in the coastal network.

    Hugh Possingham, director of the Centre of Excellence for Environmental Decisions at the University of Queensland, points out that little more than half of the Coral Sea reserve is proposed as a ‘no take’ area, in which all fishing would be banned. The world’s largest existing marine reserve, established last year by the British government in the Indian Ocean, spans 544,000 km² and is a no-take zone throughout. An alliance of campaigning conservation groups argues that more of the Coral Sea should receive this level of protection.

    “I would like to have seen more protection for coral reefs,” says Terry Hughes, director of the Centre of Excellence for Coral Reef Studies at James Cook University in Queensland. “More than 20 of them would be outside the no-take area and vulnerable to catch-and-release fishing”.

    As Nature went to press, the Australian government had not responded to specific criticisms of the plan. But Robin Beaman, a marine geologist at James Cook University, says that the reserve does “broadly protect the range of habitats” in the sea. “I can testify to the huge effort that government agencies and other organizations have put into trying to understand the ecological values of this vast area,” he says.

    Reserves proposed earlier this year for Australia’s southwestern and northwestern coastal regions have also been criticized for failing to give habitats adequate protection. In August, 173 marine scientists signed an open letter to the government saying they were “greatly concerned” that the proposals for the southwestern region had not been based on the “core science principles” of reserves—the protected regions were not, for instance, representative of all the habitats in the region, they said.

    Critics say that the southwestern reserve offers the greatest protection to the offshore areas where commercial opportunities are fewest and where there is little threat to the environment, a contention also levelled at the Coral Sea plan.

解析：D。根据题干中的Australian government和Tony Burke可定位到原文第二段。第二段第二句为Tony Burke的观点：之前澳大利亚政府提议在海岸附近设立一些列保护区，而珊瑚海提案可能成为最后一个实施的。也就是说，澳大利亚政府曾经提议过在其海岸附近设立一系列保护区，而珊瑚海是最后一个，当它成立后，这一系列的保护区就设立完成。因此D项中的叙述与原文一致，为正确答案。

错项排除：A项中提到proposal，但原文中说澳大利亚政府早已提出设立一系列保护区的提案，而不是计划制定一个新提案，故错误。B项中的criticisms在第三段开头出现，但只是说科学家和环保主义者在批评澳大利亚政府的一系列保护计划，没有提到澳大利亚政府因此而修订计划，故B项错误。C项中的Upgrade在原文中没有提及，故排除。