(Table 1) Some structural characteristics of communities and detritus flux through the lower boundary of a given water column in different regions of the Kara Sea

Vertical fluxes of autochtonous detritus at different levels were estimated using the algorithm of structure-function analysis. The calculations are based on pelagic ecosystem parameters in the Kara Sea observed in September 1993 (temperature, primary production, biomass of phytoplankton, bacteria, protozoa, and zooplankton, trophic and size composition, etc.). At eight stations in different parts of the sea where sedimentation traps were set, the range of calculated fluxes of autochtonous detritus through the lower boundary of the water column was 13-90 mgC/m**2/day. The flux was much higher in the estuary of the Yenisey River (55-90 mgC/m**2/day) than in the northeastern regions (I8-50 mgC/m**2/day) and, especially, in the relatively deep southwestern part of the sea (13-35 mgC/m**2/day). The calculated fluxes of autochtonous detritus in shallow water regions (where conditions are variable and poorly known hydrologically and where outflow of allochtonous detritus is substantial) cannot be compared to data from sedimentation traps.

本研究采用结构功能分析法（structure-function analysis），对不同水层的原地碎屑（autochtonous detritus）垂直通量进行了估算。计算基于1993年9月在喀拉海（Kara Sea）实测的浮游生态系统参数，涵盖水温、初级生产力、浮游植物、细菌、原生动物与浮游动物生物量，以及营养级组成、粒径组成等。在该海域布设了沉积捕集器（sedimentation traps）的8个站位中，经水柱下界输出的原地碎屑通量计算值范围为13~90 mgC/m²·天。其中叶尼塞河（Yenisey River）河口区域的碎屑通量（55~90 mgC/m²·天）显著高于东北部海域（18~50 mgC/m²·天），尤其远高于相对较深的喀拉海南部海域（13~35 mgC/m²·天）。浅水区环境多变且水文数据匮乏，同时外源碎屑（allochtonous detritus）输入量可观，该区域计算得到的原地碎屑通量无法与沉积捕集器实测数据进行对比。