Surface ocean currents and distribution of organisms

Morske struje su stalna gibanja mora, a rezultat su kombiniranog djelovanja vjetra, temperature i saliniteta. Iako poput valova i struje djeluju na gibanje čestica u moru, one ipak nemaju takvu snagu kojom bi mogle oštetiti organizme. Negativni utjecaji struja su što pridnene struje podizanjem sedimenta mogu uzrokovati abraziju stijena, zatrpavanje organizama i sprječavanje prihvaćanja ličinki. S druge strane, strujanje je neophodno za život mnogih bentoskih organizama, osobito filtratora i osobito nepokretnih organizama. Struje donose hranjive čestice. Kod organizama koji kopaju tunele u sedimentu struje donose kisik i hranjive tvari, a odnose ugljični dioksid i produkte ekskrecije. Struje su značajne za migracije riba i igraju značajnu ulogu u rasprostiranju planktonskih organizama i ličnki.Sea currents are continuous movements of seawater, as a result of combined influence of wind, temperature and salinity level. Like sea waves, sea currents influence movements of seawater particles, but they have no such strengths to damage the organisms. Negative influences of currents are lifting of sediments that can cause abrasion of rocks, covering of organisms and preventing of accepting of larvae. However, currents are necessary for life of many benthic organisms, especially of filtering and static organisms. Currents bring nutrients. They are useful to tunnel-digging organisms because they bring them oxygen, nutrients, and take away carbon dioxide and excretion products. Sea currents are important for fish migration. They play a vital role in distribution of plankton organisms and larvae