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调查显示长江江豚数量大幅减少
http://solidot.org.feedsportal.com/c/33236/f/556826/s/26f19baf/l/0L0Ssolidot0Borg0Cstory0Dsid0F32858/story01.htm
Dec 26th 2012, 11:17
长江淡水豚科考队在44天里往返中国最长河流寻找濒危的江豚信号。支持这项调查的世界自然基金会称,如果不采取行动江豚将在15年内灭绝。调查始于11月11日,44天里,科考队往返长江宜昌至上海江段,搜寻3400公里,而通过目视仅发现江豚380头次,声学考察发现江豚172头次。与2006年中外联合科考相比,此次发现的江豚种群数量下降了近一半,分布的区域更集中,且日益斑点化,江豚生存状况愈发令人堪忧。受航运密集、长江中下游水文状况变化、适合江豚栖息的洲滩区减少等因素影响,长江干流分布的江豚越来越少,有向码头港口和没有通航的夹江、汊道集中的趋势。科考队副总指挥、中科院水生所豚类专家王克雄说,一小群江豚只能在流动的水体里孤岛化生存,将严重影响江豚种群的繁衍生存。This entry passed through the Full-Text RSS service — if this is your content and you're reading it on someone else's site, please read the FAQ at fivefilters.org/content-only/faq.php#publishers. Five Filters recommends: Gaza Blitz - Turmoil And Tragicomedy At The BBC.
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