美国德州水域发现巨大草虾 恐威胁墨西哥湾生态
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美国德州水域发现巨大草虾 恐威胁墨西哥湾生态(图) 中新网
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中新网12月29日电
据“中央社”28日报道,美国德克萨斯州公园暨野生动物局官员表示,德州沿岸水域出现体型巨大的亚洲草虾,对当地的虾蟹构成威胁,可能危及墨西哥湾的生态系统。
这类草虾最大可长到1英尺长 (约30厘米),不仅会与小型虾类争食,还会吃掉较小的虾、蟹和牡蛎。
德州农工大学专家表示,阿蓝萨斯湾发现3只草虾,靠近路易斯安那州的萨宾湖发现1只,自由港沿岸外约70哩的墨西哥湾也有1只。
无人知道这会对生态造成怎样的影响,但科学家担心,草虾占据栖地会破坏大自然的平衡,让多元健全的海洋栖地逐渐变成以单一入侵物种为主的生态环境。
德州公园暨野生动物局官员哈特曼说:“这有可能会造成相当糟糕的情况,但我们还不知道未来会怎么样。”
草虾来自西太平洋,栖地自2006年以来逐渐延伸到墨西哥湾,但数量今年明显增加,捕虾民众6月首度在德州水域抓到草虾。
有人猜测草虾入侵墨西哥湾,始于1988年南卡罗来纳州的养殖虾意外外流,也有人说是加勒比海的人工虾池在最近飓风侵袭期间淹大水,导致草虾逃出。
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