Carbon sources of Amazonian fisheries
Carbon sources of Amazonian fisheries
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DOI：
10.1046/j.1365-2400.2000.00189.x
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发表时间：
2000-06-01
影响因子：
2
通讯作者：
Martinelli, LC
中科院分区：
文献类型：
--
作者：
Benedito-Cecilio, E;Araujo-Lima, CARM;Martinelli, LC
研究了植物C4（水生植物）、C3（森林、C3水生植物和藻类）和鱼类（黑唇鱼、巨脂鲤、无斑唇鱼和黑唇鱼）C4、C3同位素组成的季节和空间变化。对亚马逊河洪泛区的淡水鱼类（包括淡水鱼类和淡水鱼类）和淡水鱼类（包括淡水鱼类和淡水鱼类）进行了分析，以测试渔业是否以与洪泛区相同的比例向马瑙斯人口提供植物碳。C-4植物的贡献是显着较低的C-13在高水位的季节，并增加向西的盆地。Mylossoma duriventre和C.大盖蕨改变δ（13）C水平，而黑盖蕨和黑盖蕨则改变δ（13）C水平。大果壳在空间上移动。C-4对渔业产量的贡献很小。C-3植物（不包括浮游植物）的贡献也低于预期。这是因为食藻动物对渔业产量的重要性以及这些物种对藻类碳的依赖。
Variation in the seasonal and spatial isotopic composition of plant C-4 (aquatic macrophytes) and C-3 (forest, C-3 aquatic macrophytes and algae), and that of fish [Prochilodus nigricans Agassiz, Mylossoma duriventre (Cuvier), Colossoma macropomum (Cuvier), Semaprochilodus insignis (Schomburgk) and S. taeniurus Steindachner] in the Amazon floodplain were analysed to test whether the fisheries deliver plant carbon to the population of Manaus in the same proportion as it is available in the floodplain. The contribution of C-4 plants was significantly lower in C-13 during the season of high water levels and increased toward the west of the basin. Mylossoma duriventre and C. macropomum changed delta(13)C levels, while the delta(13)C of P. nigricans and C. macropomum shifted spatially. The contribution of C-4 to the fisheries yield was small. C-3 plants (excluding phytoplankton) also contributed less than expected. This was explained by the importance of detritivores to the yield of the fisheries and the dependence of these species on algal carbon.