Organic and inorganic matter in aquatic systems is usually divided into two principal fractions. Dissolved matter is the fraction that passing through a 0.45 m membrane filter includes material in true solution, together with colloidal component. The filter retained material is referred to as suspended particulate matter (Chester, 2000). Suspended particles are thought to play important roles to transport the materials vertically and horizontally in oceanic biogeochemical cycles. Through chemical transformations, elements combine to form compounds, and the biogeochemical cycle of each element must also be considered in relation to the biogeochemical cycles of other elements.
Marginal sea, adjacent to the North Pacific (e.g., Sea of Okhotsk, Bering Sea and Chuckchi Sea), own their specific characteristics. Sea of Okhotsk is semi-closed area, surrounding by lands and continental that influence its characteristics. Several studies have shown that Amur river is one of the most influences way that land area effects to dynamics of Sea of Okhotsk.