As Invasive Species
In the late 1980s the ctenophore species Mnemiopsis leidyi was introduced into the Black Sea, probably through ballast water, which led to the collapse of the local anchovy population. In 1997 another ctenophore species arrived--Beroe ovata, a predator of Mnemiopsis leidyi. The Beroe population underwent an initial explosion, until the numbers of both ctenophores stabilized. Nevertheless, both Mnemiopsis leidyi and Beroe ovata remain today in the Black Sea. The same phenomenon is occurring at the beginning of the 21st century in the Caspian Sea.
Read more about this topic: Nuda
Famous quotes containing the words invasive and/or species:
“The frequency of personal questions grows in direct proportion to your increasing girth. . . . No one would ask a man such a personally invasive question as Is your wife having natural childbirth or is she planning to be knocked out? But someone might ask that of you. No matter how much you wish for privacy, your pregnancy is a public event to which everyone feels invited.”
—Jean Marzollo (20th century)
“If Steam has done nothing else, it has at least added a whole new Species to English Literature ... the bookletsthe little thrilling romances, where the Murder comes at page fifteen, and the Wedding at page fortysurely they are due to Steam?
And when we travel by electricityif I may venture to develop your theorywe shall have leaflets instead of booklets, and the Murder and the Wedding will come on the same page.”
—Lewis Carroll [Charles Lutwidge Dodgson] (18321898)