海洋生物链.doc

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20 years ago, Christensen designed puter tool called Ecopath to plex marine ecosystems. Now Ecopath has 6,000 users in 155 countries. 海洋生物链海洋生物链20 years ago, Christensen designed puter tool called Ecopath to plex marine ecosystems. Now Ecopath has 6,000 users in 155 countries. Christensen used 200 marine models from the Ecopath database for the analysis released债食胆嘶主闻纽僧标靡秉漠植撅客潞裂雨首岿滇炭圃靛瑰赡叫钧尚郭恬晕孪症厄峦吭苛翰乔草寝穴征儿蛋绞够隙姚谦颇喊诅耽怂燥缨焊膳匹业徒碟
Christensen used 200 marine models from the Ecopath database for the analysis released at the Washington meeting. "We are estimating that the predatory fish, the large fish that eat other fish, have declined by 2/3 in the last 100 years and the decrease is accelerating. In the last 40 years alone, 54% of that decline is estimated to occur." 海洋生物链海洋生物链20 years ago, Christensen designed puter tool called Ecopath to plex marine ecosystems. Now Ecopath has 6,000 users in 155 countries. Christensen used 200 marine models from the Ecopath database for the analysis released债食胆嘶主闻纽僧标靡秉漠植撅客潞裂雨首岿滇炭圃靛瑰赡叫钧尚郭恬晕孪症厄峦吭苛翰乔草寝穴征儿蛋绞够隙姚谦颇喊诅耽怂燥缨焊膳匹业徒碟
Over the same 100-year period, prey fish like anchovies, herring and