Dissolved carbohydrates in Antarctic sea ice
Dissolved carbohydrates in Antarctic sea ice
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DOI：
10.1017/s0954102001000190
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发表时间：
2001-06-01
影响因子：
1.6
通讯作者：
Dieckmann, GS
中科院分区：
文献类型：
--
作者：
Herborg, LM;Thomas, DN;Dieckmann, GS
分析了夏季韦德尔海海冰(表层池塘、冰芯、缝隙层和小片冰)不同冰生境中溶解的单碳水化合物(MCHO)和多碳水化合物(PCHO)的浓度。还测量了这些生境的溶解有机碳(DOC)库，并评估了碳水化合物对该库的贡献。与表层海水相比，所有海冰生境中的DOC浓度都较高，最高可达958亩MC。总碳水化合物(TCHO)在冰芯和片状冰样中最高，高达DOC池的31%，反映了这两个生境类别的高藻类生物量。其他生境的TCHO占DOC的10%~29%。不同冰区MCHO/PCHO的比例差异很大：表层池塘和冰芯MCHO占TCHO池的70%，而空隙层和片状冰层PCHO含量较低，导致MCHO占TCHO的88%。
Concentrations of dissolved monocarbohydrates (MCHO) and polycarbohydrates (PCHO) were analysed in a variety of ice habitats from summer Weddell Sea sea ice (surface ponds, ice cores, gap layers and platelet ice). The dissolved organic carbon (DOC) pool in these habitats was also measured and the contribution of carbohydrate to this pool was assessed. The DOC concentrations within all sea ice habitats were high compared to surface seawater concentrations with values up to 958 mu MC being measured. Total carbohydrates (TCHO) were highest in the ice cores and platelet ice samples, up to 31% of the DOC pool, a reflection of the high algal biomass in these two habitat classes. TCHO in the other habitats ranged between 10% and 29% of DOC. The ratios of MCHO to PCHO varied considerably between the ice habitats: in surface ponds and ice cores MCHO was 70% of the TCHO pool, whereas in gap layers and platelet ice there were lower PCHO concentrations resulting in MCHO being 88% of TCHO.