Global warming and climatic changes

Abstract

In this study, warming and climatic changes and their effects on the world were reviewed. It was estimated in last century that the air temperature on the world increased about 0.7-0.8 degrees C. If precautionary measures have not to be taken, this increase will be continued in future. This situation causes natural catastrophe such as decrease of glaciers, increase of desert area, disorder falling of rain and snow, torrent, whirlwind. It is expected important changes fish populations living in the seas. Some fish species will have to migrate to other regions. In addition, it is expected that especially lessepsian fish species will increase in the our seas which will migrate from the Red Sea and Atlantic Ocean to the Mediterranean Sea by The Suez Channel and Gibraltar