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1998 /1 999年南极夏季 ,作者随“雪龙船”在南极普里兹湾及其北部海区 (63° - 69°1 2′S ,70°30′- 75°30′E) 3条断面 2 4个测站进行浮游生物现存量和初级生产力的现场观测 ,研究叶绿素a浓度和初级生产力的分布特征。测区表层叶绿素a浓度为 0 .1 6 - 3 .99μg/dm3,普里兹湾内和湾西部四女士浅滩海域浓度在 3 .5μg/dm3以上 ;平面分布趋势从湾内向西北方向递减 ,深海区浓度在 0 .5μg/dm3以下。从垂向看叶绿素a浓度的最大值大多出现于 2 5m或 50m层 ,50m以下更深层的浓度随深度的增加而降低 ,2 0 0m层叶绿素a浓度分布范围为 0 .0 1 - 0 .95μg/dm3。粒径分级叶绿素a浓度以微小型浮游生物的贡献占优势 (56 % ) ,微型浮游生物的贡献占2 4 % ,微微型浮游生物的贡献占 2 0 %。测区潜在初级生产力为 0 .1 1～ 1 1 .67mgC/(m3·h) ,平均值为 2 .0 0± 2 .80mgC/(m3·h)。高生产力区位于普里兹湾 ,平均现场生产力达到 0 .86gC/(m2 ·d) ;依次为陆架区、陆坡区 ,深海区生产力较低 ,平均现场生产力为 0 .1 7gC/(m2 ·d)。光合作用同化数较低 (1 .53± 1 .1 1mgC/(mgChla·h) )。粒径分级初级生产力以微小型浮游生物的贡献占优势 (58% ) ,微型浮游生物的贡献占 2 6 % ,微微型浮游生物的贡献占 1 6 %。浮游植?
1998/999 Antarctic summer, the author with the “Snow Dragon Boat” Prydz Bay in the South Pole and its northern sea area (63 ° - 69 ° 1 2’S, 70 ° 30’- 75 ° 30’E) 3 section 2 Four stations were used for on-site observations of plankton present and primary productivity to study the distribution of chlorophyll-a concentration and primary productivity. The concentration of chlorophyll a in the test area was between 0.16 and 3.99 μg / dm3, and the concentration of the shoal in the area of four ladies in the Pridz Bay and the western part of the Bay was above 3.5 μg / dm3. The distribution trend of the surface area decreased from the bay to the northwest, The concentration of 0.5μg / dm3 or less. The maximum of chlorophyll a concentration appeared mostly in 25 m or 50 m layer from the vertical direction, while the deeper layer below 50 m decreased with increasing depth. The concentration of chlorophyll a in 200 m layer ranged from 0.010 to 0.95 μg / dm3. Particle size-fractionated chlorophyll a concentrations dominated micro-plankton contributions (56%), mini-plankton contribution by 24% and pico-plankton contribution by 20%. Potential primary productivity of the survey area was 0.11-1.167mgC / (m3 · h) with an average of 2.00 ± 2.80mgC / (m3 · h). The high productive area is located in Prydz Bay, with an average on-site productivity of 0.86 gC / (m2 · d), followed by low productivity in the shelf area, slope area and deep sea area with an average on-site productivity of 0.17 gC / (m2 · d ). Photosynthesis assimilation numbers were lower (1.53 ± 1 .1 mgC / (mgChla · h)). Particle size primary productivity contributes to the contribution of micro-plankton (58%), micro-plankton contribution to 26%, and pico-plankton contribution to 16%. Phytoplankton?