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首页> 外文期刊>Estuarine Coastal and Shelf Science >Mesozooplankton dynamics in nearshore waters of the Great Barrier Reef
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Mesozooplankton dynamics in nearshore waters of the Great Barrier Reef

机译：大堡礁近海水域中游浮游生物的动力学

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摘要

Zooplankton dynamics (community composition, juvenile somatic growth rate, adult egg production, secondary production) were studied in coastal waters of the Great Barrier Reef. Two sectors were compared, one adjacent to a catchment of near-pristine land use patterns, the other to a more intensively farmed catchment. Sampling was conducted in the austral winter (August) and summer (January-March) of two succeeding years. Gradients in zooplankton community composition were weak, with only moderate effects of season and sector. Overall, 37% of zooplankton biomass was in the 73-150 μm size fraction, 26% in the 150-350 μm fraction, and 38% was > 350 μm. There was no biomass difference and only small differences in community composition between samples taken during the day and at night; ostracods and large calanoid copepods were occasionally more common at night. Carbon-specific growth rates averaged 0.29 d~(-1) for cyclopoid copepods and 0.35 d~(-1) for calanoid copepods, with no difference between sectors. Calanoid copepod growth showed a significant relationship to chlorophyll concentration, but cyclopoid copepods did not. Copepod egg production was low (7.9 ± 5.9 eggs female~(-1) d~(-1)) and apparently food-limited. Copepod secondary production was lower in August (mean = 2.6, range 1.4-4.0 mg C m~(-2) d~(-1)) than in January-March (mean = 8.5, range 2.4-15.5 mg C m~(-2) d~(-1)). Secondary production by mesozooplankton in the 73-100 μm size range averaged 0.9% of total phytoplankton production.
机译：在大堡礁沿海水域研究了浮游动物的动力学（群落组成，少年体细胞生长速率，成虫产蛋量，次级产蛋量）。对两个部门进行了比较，一个部门接近一个接近原始土地利用模式的流域，另一个部门则是一个集约化耕种的流域。在随后两年的冬季（八月）和夏季（一月至三月）进行采样。浮游动物群落组成的梯度较弱，仅对季节和区域有中等影响。总体而言，浮游动物生物量中有37％在73-150μm的粒径范围内，在150-350μm的粒径中占26％，而大于350μm的则占38％。白天和晚上采集的样品之间没有生物量差异，群落组成只有很小差异；在夜间，类和大型类颅足co足类动物有时更常见。摆线类pe足类的碳比平均增长率平均为0.29 d〜（-1），而类an足类co足类的碳平均增长率为0.35 d〜（-1），各部门之间没有差异。 Calanoid copepod的生长与叶绿素浓度显示出显着的相关性，而cyclopoid copepods却没有。 pe足类卵的产量低（雌性（-1）－（-1）d〜（-1）－7.9±5.9个卵），显然食物有限。 Copepod的二次生产在8月（平均值= 2.6，范围1.4-4.0 mg C m〜（-2）d〜（-1））低于1月至3月（平均值= 8.5，范围2.4-15.5 mg C m〜（-1）） -2）d〜（-1））。中小型浮游生物在73-100微米大小范围内的二次生产平均占浮游植物总产量的0.9％。

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