Separation strategies for invertebrate dormant stages contained in sediment

Separation strategies for invertebrate dormant stages contained in sediment

Invertebrates and their dormant stages are an essential component of most freshwater and marine ecosystems (Cáceres 1997). As the active invertebrate community has a very variable distribution, both in time and space (Arnott et al. 1999, Folt & Burns 1999), reliable assessment of community diversity consequently requires repeated sampling across multiple locations for a prolonged period of time...

Estimation of Friction Coefficient in Sediment Contained Flow through Rockfill

An increase in the flow velocity in flowthrough large porous media and deflection of flow regime from Darcy law causes a nonlinear relationship between hydraulic gradient and pore velocity of media. So many investigations have done previously in such Medias. One of the most important subjects in flowthrough large porous media is relationship between friction coefficient and flow characteristics...

Strategies for Protein Separation

Viability of invertebrate diapausing eggs collected from residual ballast sediment

Natural or anthropogenic movement of sediments may be an important vector for the dispersal of invertebrate resting stages between water bodies. Here we record the presence of invertebrate diapausing eggs in residual sediments from transoceanic vessels and explore whether these may pose an invasion risk. Viability of diapausing eggs was explored under light and dark conditions using sediment co...

Morphological spelling strategies: developmental stages and processes.

The spelling of many words in English and in other orthographies involves patterns determined by morphology (e.g., ed in past regular verbs). The authors report a longitudinal study that shows that when children first adopt such spelling patterns, they do so with little regard for their morphological basis. They generalize the patterns to grammatically inappropriate words (e.g., sofed for soft)...