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原文連結
論文資訊
- 類型：已發表論文
- 日期：2004
摘要
Previous studies suggest that food-web theory has yet to account for major differences in food-web properties of 海洋 versus other types of ecosystems. We examined this issue by analyzing the 網絡 structure of 食物網s for the Northeast US Shelf, a Caribbean reef, and Benguela, off South Africa. The values of connectance (links per 物種(2)), link density (links per 物種), mean chain length, and fractions of intermediate, omnivorous, and cannibalistic taxa of these 海洋 webs are somewhat high but still within the ranges observed in other webs. We further compared the 海洋 webs by using the empirically corroborated 'niche model' that accounts for observed variation in 多樣性 (taxon number) and complexity (connectance). Our results substantiate previously reported results for estuarine, fresh-water, and terrest
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