Volume 46, Issue 4 pp. 653-657
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REPORT OF A NEW INVASIVE ALGA IN THE ATLANTIC UNITED STATES: “HETEROSIPHONIA” JAPONICA IN RHODE ISLAND1

Craig W. Schneider

Craig W. Schneider

Department of Biology, Trinity College, Hartford, Connecticut 06106-3100, USA

Author for correspondence: e-mail [email protected].

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First published: 02 August 2010
Citations: 22

Received 7 January 2010. Accepted 12 May 2010.

Abstract

Recent collections of tetrasporangiate “Heterosiphonia” japonica Yendo from Watch Hill to Point Judith, Rhode Island, represent the first report of this nonnative alga in the western Atlantic. Native to the Pacific Ocean, this species was unintentionally introduced into European waters by 1984 and has subsequently invaded the eastern Atlantic Ocean widely from France to Norway and south into the Mediterranean Sea. Thus far, all western Atlantic collections of this species are confined to the outer coast of Rhode Island, and at present are not found in Narragansett Bay or in Long Island Sound along the Connecticut coast. Molecular and morphological studies confirm the identity of this newly introduced invasive species.

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