Changes in the structure of a New England (USA) kelp bed: the effect of an introduced species?
Since its first observation in the Gulf of Maine (Northwest Atlantic) in 1987, the epiphytic bryozoan Membranipora membranacea has become the dominant epiphyte on laminarian kelps. This note describes changes in the structure of a kelp bed at Cape Neddick (Mane, USA) after the coincident increase of...
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1992
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ftuninhampshire:oai:scholars.unh.edu:jel-1354 2023-05-15T17:45:39+02:00 Changes in the structure of a New England (USA) kelp bed: the effect of an introduced species? Lambert, Walter J. Levin, Phillip S. Berman, Jody 1992-11-12T08:00:00Z application/pdf https://scholars.unh.edu/jel/209 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1354&context=jel unknown University of New Hampshire Scholars' Repository https://scholars.unh.edu/jel/209 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1354&context=jel Jackson Estuarine Laboratory text 1992 ftuninhampshire 2023-01-30T21:55:31Z Since its first observation in the Gulf of Maine (Northwest Atlantic) in 1987, the epiphytic bryozoan Membranipora membranacea has become the dominant epiphyte on laminarian kelps. This note describes changes in the structure of a kelp bed at Cape Neddick (Mane, USA) after the coincident increase of M. membranacea, evaluates the potential causes of the observed changes, and documents the shortterm recovery of the kelp bed. Percent cover, length and density of kelps decreased significantly during 1989 through 1991 The dispersion of Laminaria spp. within the kelp bed was clumped on each sampling date at a large spatial scale (meters), while the distribution of Laminana spp. changed from a random pattern to a clumped d~stribut~on on a smaller spatial scale (0.25 m'). There were no consistent differences in storm intensity between years; densities of herbivores within the kelp bed were low and also have not changed between years. The coverage of M. membranacea on laminarian kelps increased 3-fold from 1989 to 1990, and the total coverage of other epiphytes decreased. It appears that the presence of M. membranacea on kelps has contributed to the defoliation of the kelp bed at Cape Neddick. This phenomenon may have important consequences to organisms that utilize kelps as habitat and shelter. Text Northwest Atlantic University of New Hampshire: Scholars Repository |
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University of New Hampshire: Scholars Repository |
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ftuninhampshire |
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description |
Since its first observation in the Gulf of Maine (Northwest Atlantic) in 1987, the epiphytic bryozoan Membranipora membranacea has become the dominant epiphyte on laminarian kelps. This note describes changes in the structure of a kelp bed at Cape Neddick (Mane, USA) after the coincident increase of M. membranacea, evaluates the potential causes of the observed changes, and documents the shortterm recovery of the kelp bed. Percent cover, length and density of kelps decreased significantly during 1989 through 1991 The dispersion of Laminaria spp. within the kelp bed was clumped on each sampling date at a large spatial scale (meters), while the distribution of Laminana spp. changed from a random pattern to a clumped d~stribut~on on a smaller spatial scale (0.25 m'). There were no consistent differences in storm intensity between years; densities of herbivores within the kelp bed were low and also have not changed between years. The coverage of M. membranacea on laminarian kelps increased 3-fold from 1989 to 1990, and the total coverage of other epiphytes decreased. It appears that the presence of M. membranacea on kelps has contributed to the defoliation of the kelp bed at Cape Neddick. This phenomenon may have important consequences to organisms that utilize kelps as habitat and shelter. |
format |
Text |
author |
Lambert, Walter J. Levin, Phillip S. Berman, Jody |
spellingShingle |
Lambert, Walter J. Levin, Phillip S. Berman, Jody Changes in the structure of a New England (USA) kelp bed: the effect of an introduced species? |
author_facet |
Lambert, Walter J. Levin, Phillip S. Berman, Jody |
author_sort |
Lambert, Walter J. |
title |
Changes in the structure of a New England (USA) kelp bed: the effect of an introduced species? |
title_short |
Changes in the structure of a New England (USA) kelp bed: the effect of an introduced species? |
title_full |
Changes in the structure of a New England (USA) kelp bed: the effect of an introduced species? |
title_fullStr |
Changes in the structure of a New England (USA) kelp bed: the effect of an introduced species? |
title_full_unstemmed |
Changes in the structure of a New England (USA) kelp bed: the effect of an introduced species? |
title_sort |
changes in the structure of a new england (usa) kelp bed: the effect of an introduced species? |
publisher |
University of New Hampshire Scholars' Repository |
publishDate |
1992 |
url |
https://scholars.unh.edu/jel/209 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1354&context=jel |
genre |
Northwest Atlantic |
genre_facet |
Northwest Atlantic |
op_source |
Jackson Estuarine Laboratory |
op_relation |
https://scholars.unh.edu/jel/209 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1354&context=jel |
_version_ |
1766148832619397120 |