Distribution of biologic, anthropogenic, and volcanic constituents as a proxy for sediment transport in the San Francisco Bay Coastal System

摘要: Abstract Although conventional sediment parameters (mean grain size, sorting, and skewness) provenance have typically been used to infer transport pathways, most freshwater, brackish, marine environments are also characterized by abundant constituents of biological, possibly anthropogenic volcanic, origin that can provide additional insight into local sedimentary processes. The biota will be spatially distributed according its response environmental such as water temperature, salinity, dissolved oxygen, organic carbon content, intensity currents tidal flow, whereas the presence volcanic reflect proximity source areas whether they fluvially- or aerially-transported. Because each these a unique signature, more precise proxy for area than process indicators. This San Francisco Bay Coastal System study demonstrates applying multi-proxy approach, primary sites identified. Many far from where originated, showing is widespread in region. not often used, identifying interpreting distribution naturally-occurring allochthonous biologic, anthropogenic, powerful tool aid investigation pathways other coastal systems.