In the revised, fifth edition of the American Psychiatric Association's Diagnostic and Statistical Manual of Mental Disorders (DSM-5), hoarding disorder becomes a separate diagnosis, characterized by a persistent difficulty discarding or parting with possessions, regardless of their actual value..
Surface ocean currents are driven mainly by winds and are affected by seasons.Deep ocean currents are driven mainly by density and temperature gradients. However the most important and fundamental causes for the formation of the ocean currents are solar heating,winds and gravity. Source(s): Arasan Â· 9 years ago.
Surprisingly for the non-specialist on marine ecology, the most significant impact of. ocean currents on marine life consists of the enhancement of primary productivity, and. that is the reason why this article is placed within the Topic Productivity of the Oceans. This is so because primary production in the ocean is limited by availability of light and. nutrients.