RESPIRATION AND ITS SIZE-DEPENDENCE IN MICROPLANKTON POPULATIONS FROM SURFACE WATERS OF THE CANADIAN ARCTIC
RESPIRATION AND ITS SIZE-DEPENDENCE IN MICROPLANKTON POPULATIONS FROM SURFACE WATERS OF THE CANADIAN ARCTIC
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DOI：
10.1007/bf00274877
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发表时间：
1986-10-01
期刊：
影响因子：
1.7
通讯作者：
HARRISON, WG
中科院分区：
文献类型：
--
作者：
HARRISON, WG
1983 年夏季，测量了加拿大北极地区近地表水域微型浮游生物耗氧量（呼吸）和产量的空间分布和大小依赖性。在地表附近（上部 20-30 m）观察到高氧通量率（消耗和生产），通常与高浮游植物生物量（叶绿素 a）水平有关。然而，呼吸作用的很大一部分（> 50%）位于透光带以下。在大多数采样位置，积分氧通量 (0-100 m) 大致处于平衡状态（即，净氧产量约 0）。总体而言，氧通量高于南大洋观测到的氧通量，但与温带沿海水域的氧通量处于相同范围。尺寸分级研究表明，大多数 (> 60%) 的氧气产量和浮游植物生物量（叶绿素 a）与大于 35 μm 的生物体相关。另一方面，超过 70% 的呼吸作用与小于 35 μm 的生物体有关；平均而言，超过 50% 的呼吸作用与小于 1 μm 的生物体相关。这些结果与理论研究和温带水域的实验观察结果一致。
The spatial distribution and size-dependence of oxygen consumption (respiration) and production by microplankton in near surface waters of the Canadian Arctic were measured during summer, 1983. High oxygen flux rates (consumption and production) were observed near surface (upper 20-30 m) and were generally associated with high phytoplankton biomass (chlorophyll a) levels. A substantial portion of the respiration (> 50%), however, was below the euphotic zone. Integrated oxygen fluxes (0-100 m) were approximately in balance (i.e., net oxygen production .apprxeq. 0) at most locations sampled. In general, oxygen fluxes were higher than have been observed in the Southern Ocean but in the same range as found in temperate coastal waters. Size-fractionation studies showed that most (> 60%) of the oxygen production and phytoplankton biomass (chlorophyll a) were associated with organisms greater than 35 .mu.m. On the other hand, more than 70% of the respiration was associated with organisms less than 35 .mu.m; on average, more than 50% of the respiration was associated with organisms less than 1 .mu.m. These results are consistent with theoretical studies and with experimental observations from temperate waters.