Although there were serious concerns that the recent expansion of the Suez Canal by 2015 could trigger a huge wave of invasions [ 6 ], the annual rate of introductions in the Mediterranean seems to be in a decreasing trend, currently with no rational explanations, except for the survey intensity over years [ 7 ].
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The sentences
An increasing trend in the number of ship-borne species is evident between the periods 1990–2010 in the Levantine Sea, but its importance in the species introduction was dropped from 32% to 22% in the last decade.