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This paper analyzed the settling process of Cd and the origin in Jiaozhou Bay based on investigation data during 1979 — 1983. Results showed that the distributions of Cd contents in bottom waters were determined by the spatialtemporal variations of the Cd source inputs, and the transports of Cd from land/atmosphere to ocean. The seasonal-spatial variations of the settling of Cd resulted...
We selected four kinds of land use types from Caohai wetlands of Guizhou plateau (a total number of 32 soil profiles) to study the distribution characteristics of organic carbon content in soil. With different ways of land use, the organic carbon content of soil profiles and organic carbon density show the tendency of decreasing firstly and then increasing from top to bottom. With the increase of...
Based on investigation dada on Cadmium (Cd) in surface waters in Jiaozhou Bay in 1982, this paper analyzed the content, distribution and source of Cd. Results showed that The content of Cd in April, June, July and October in surface waters ranged from 0.11–0.53 µg.L−1, 0.11–0.21 µg.L−1, 0.12–0.52 µg.L−1 and 0.32–0.53 µg.L−1, respectively. Cd contents were meeting Grade I (1.00 µg.L–1) in National...
This paper analyzed the content, distribution and source of Cr in surface waters in Jiaozhou Bay in 1982. Results showed that Cr content in April, June, July and October, ranged from 0.81–2.11µg.L−1, 0.33–9.67µg.L−1, 1.02–9.62µg.L−1 and 0.24–1.35µg.L−1, respectively, complied with Grade I (50.00µg.L−1) in Sea water quality standard (GB 3097–1997) of China, indicating that Jiaozhou Bay was very lightly...
Jiaozhou Bay is a semi-closed bay located in Shandong Province, eastern China. Based on investigation data on distribution of Hg content in surface and bottom waters in May 1983, April and October 1985, this paper analyzed the influence of ocean current on Hg content in the bay mouth. Results showed that In case of Hg content in both surface and bottom waters was relative low, low Hg content areas...
Based on the investigation data of mercury (Hg) in waters in Jiaozhou bay during time periods of 1979 to 1985 (absent of 1984), in the spatial scale, by means of the analysis of the annual Hg dataset, by the view of the content, horizontal and vertical distribution and season of the Hg, studying the source, water quality, distribution and transfer of the Hg in the marine waters of the Jiaozhou bay...
The earth ecosystem has life characteristics by itself, and is able to maintain sustainable development through strong capability of self-regulate and self-control. This paper showed that in the biogeochemical process of silicon (Si) and Carbon (C), the earth ecosystem determined the phytoplankton growth by virtue of silicon, in turn by virtue of the phytoplankton growth determined the variation of...
The morphological expressions of imposex in gastropods have been classified into seven stages (S0–S6) with three types (a, b and c). This typical imposex scheme, however, fails to cover some new findings such as specimens with the proximal vas deferens section passing by the vaginal opening (VDSP) and aborted egg capsules. In the present study, Cantharus cecillei was sampled from the coastal waters...
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