White-noise-like distribution of the oceanic copepod Neocalanus cristatus in the subarctic North Pacific
White-noise-like distribution of the oceanic copepod Neocalanus cristatus in the subarctic North Pacific
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北太平洋亚北极地区海洋桡足类新卡拉努斯克里斯塔斯的类白噪声分布
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
T. Sato
中科院分区：
文献类型：
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作者：
A. Tsuda;H. Sugisaki;T. Ishimaru;T. Saino;T. Sato
在北太平洋西部亚北极地区，利用电子粒子计数器连续估计了春季新冠藻的丰度。在采样间隔510 m、覆盖范围2519 km的中、大尺度观测中，斑块数量随斑块大小和斑块内桡足类密度的增加呈指数递减。最大斑块大小和密度分别为6.6 km和1230 indm -3。在微尺度观测中，当采样间隔为10 ~ 30 m时，斑块数量也随斑块大小和密度呈指数递减。对温度、盐度、v ~ v ~叶绿素荧光和桡足类丰度的光谱分析表明，桡足类不具有在其他参数中观察到的典型斑块长度或波数依赖性。这些类白噪声光谱结合微观到宏观尺度的一般观测结果表明，N crjstatus在至少10 m至50 km的所有长度尺度上都有斑块。给定顺序的斑块是由更小尺度的斑块聚集而成的。
Continuous estimates of Neocalanus cristatus abundance were obtained with an electric particle counter along a cruise track in the subarctic western North Pacific in spring. In mesoto megascale observations, with sampling interval 510 m and coverage 2519 km, the number of patches decreased exponentially both with increasing patch size and with density of the copepods in the patch. The maximum patch size and density were 6.6 km and 1230 ind. m-3, respectively. In micro-scale observations, with sampling interval 10 to 30 m, the number of patches also decreased exponentially with patch size and density. Spectral analysis of temperature, salinity, in v ~ v o chlorophyll fluorescense and copepod abundance showed that the copepod did not have the characteristic patch-length or wavenumber dependencies observed in the other parameters These white-noise-like spectra, together with the general observations on microto mega-scales, suggested that N crjstatus had patches in all length scales from at least 10 m to 50 km, and that patches of a given order were constituted by the gathering of smaller-scale patches.