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URBAN GULLS SPELL HEALTH RISK

机译：城市鸥散播健康风险

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In the past year, three seminars have been held to discuss bird hazards. Much focus has been given to increased urban gull problems. It is generally agreed that populations are increasing exponentially, and many are blaming this increase on landfill sites. In the May 2003 issue of Environmental Health Journal, it was claimed that "the key event leading to the full increase was the passing of the Clean Air Act in 1956. The Act forbade the burning of rubbish at tips, instead it required operators to cover the tip face with inert material at the end of a day's tipping". The author goes on to claim that this was an open invitation to the gulls and populations rose by fifteen-fold by the early 1970s. In turn, this explosion led to gulls creating new colonies and searching breeding grounds are readily available on urban rooftops where they are free from predators and disturbance. They are able to breed more successfully -producing two chicks a year compared to cliff top colonies who are fortunate to breed one successful chick per year.
机译：在过去的一年中，已经举办了三个研讨会来讨论鸟类的危害。人们越来越关注城市海鸥问题。人们普遍认为，人口呈指数级增长，许多人将此归咎于垃圾填埋场。在2003年5月的《环境健康杂志》上，“导致全面增加的关键事件是1956年通过了《清洁空气法》。该法禁止在尖端焚烧垃圾，取而代之的是要求运营商掩盖垃圾。在一天的小费结束时用惰性材料制成的小费脸”。作者继续声称，这是对海鸥的公开邀请，到1970年代初期，海鸥的数量增加了15倍。反过来，这次爆炸导致海鸥创造新的殖民地，并且在没有屋顶天敌和干扰的城市屋顶上容易找到繁殖地。他们能够更成功地繁殖-每年有2只小鸡，而有顶峰的殖民地每年有1只成功的小鸡。

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