Sipuncula of the western North Atlantic. Bulletin of the AMNH

p. 105-204 : ill., maps 27 cm. Includes bibliographical references (p. 199-204). "More than 8300 sipunculans from more than 500 stations of the east coast of the United States are identified and described. The area under investigation extends from Nova Scotia to cape Kennedy, Florida, in depths...

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Main Author: Cutler, Edward Bayler.
Format: Text
Language:English
Published: New York : [American Museum of Natural History] 1973
Subjects:
Online Access:http://hdl.handle.net/2246/601
id ftamnh:oai:digitallibrary.amnh.org:2246/601
record_format openpolar
spelling ftamnh:oai:digitallibrary.amnh.org:2246/601 2023-05-15T17:32:59+02:00 Sipuncula of the western North Atlantic. Bulletin of the AMNH v. 152, article 3 Cutler, Edward Bayler. 1973 20970317 bytes application/pdf http://hdl.handle.net/2246/601 eng en_US eng New York : [American Museum of Natural History] Bulletin of the American Museum of Natural History v. 152, article 3 http://hdl.handle.net/2246/601 Sipuncula -- Atlantic Coast (U.S.) Sipuncula -- North Atlantic Ocean text 1973 ftamnh 2022-03-24T06:33:21Z p. 105-204 : ill., maps 27 cm. Includes bibliographical references (p. 199-204). "More than 8300 sipunculans from more than 500 stations of the east coast of the United States are identified and described. The area under investigation extends from Nova Scotia to cape Kennedy, Florida, in depths from 10 to 5400 meters. Several abiotic factors of the environment (topography, currents, temperature, and sediments) are described. Each species is characterized morphologically and also in terms of depth, latitude, sediment, and temperature. A key is given for the identification of all the 26 species collected. Distribution maps for the species are presented, as well as figures showing their morphology. In the description of each species, particular attention is paid to variation in morphology due to ontogeny. Several combinations of existing species names are suggested. Based on abiotic niche features, the species are grouped into four major ecological units: southern, shallow, warm water; northern, shallow, cold water; slope; and abyssal. Competitive exclusion operates within each of these groups except the abyssal fauna; this group has more sympatric species than the shallower groups and their morphology is less distinctive. One possible explanation is the limited magnitude of the significant environmental differences, which may be too small to be effective. Another is that the relatively low density greatly reduces the likelihood of two worms coming into contact and competing for given resources. The continental slope may not be an ecotone, but ecotones may exist along its upper and lower boundaries. The existence of a shallow-water, zoogeographical barrier at Cape Hatteras is reaffirmed, but the role of currents on larval dispersal may be as important as temperature in maintaining this barrier. A barrier on the slope, maintained by the effect of the bottom currents on larval dispersion just south of Cape Hatteras (latitude 34°20'-34°30'N), is proposed. Three of the four ecological groupings of species fit into pre-existing zoogeographical provinces (Carolinian, Nova Scotian, and Abyssal Atlantic subarea), but a new province (Atlantic Transitional) is proposed for the slope. Sipunculans in the Virginian Province are extremely rare. Two pieces of evidence support the concept that abyssal, cold-water fauna is ancestral to the warmer, shallow-water fauna"--P. 107. Text North Atlantic American Museum of Natural History: AMNH scientific publications Cape Kennedy ENVELOPE(-64.074,-64.074,-64.753,-64.753)
institution Open Polar
collection American Museum of Natural History: AMNH scientific publications
op_collection_id ftamnh
language English
topic Sipuncula -- Atlantic Coast (U.S.)
Sipuncula -- North Atlantic Ocean
spellingShingle Sipuncula -- Atlantic Coast (U.S.)
Sipuncula -- North Atlantic Ocean
Cutler, Edward Bayler.
Sipuncula of the western North Atlantic. Bulletin of the AMNH
topic_facet Sipuncula -- Atlantic Coast (U.S.)
Sipuncula -- North Atlantic Ocean
description p. 105-204 : ill., maps 27 cm. Includes bibliographical references (p. 199-204). "More than 8300 sipunculans from more than 500 stations of the east coast of the United States are identified and described. The area under investigation extends from Nova Scotia to cape Kennedy, Florida, in depths from 10 to 5400 meters. Several abiotic factors of the environment (topography, currents, temperature, and sediments) are described. Each species is characterized morphologically and also in terms of depth, latitude, sediment, and temperature. A key is given for the identification of all the 26 species collected. Distribution maps for the species are presented, as well as figures showing their morphology. In the description of each species, particular attention is paid to variation in morphology due to ontogeny. Several combinations of existing species names are suggested. Based on abiotic niche features, the species are grouped into four major ecological units: southern, shallow, warm water; northern, shallow, cold water; slope; and abyssal. Competitive exclusion operates within each of these groups except the abyssal fauna; this group has more sympatric species than the shallower groups and their morphology is less distinctive. One possible explanation is the limited magnitude of the significant environmental differences, which may be too small to be effective. Another is that the relatively low density greatly reduces the likelihood of two worms coming into contact and competing for given resources. The continental slope may not be an ecotone, but ecotones may exist along its upper and lower boundaries. The existence of a shallow-water, zoogeographical barrier at Cape Hatteras is reaffirmed, but the role of currents on larval dispersal may be as important as temperature in maintaining this barrier. A barrier on the slope, maintained by the effect of the bottom currents on larval dispersion just south of Cape Hatteras (latitude 34°20'-34°30'N), is proposed. Three of the four ecological groupings of species fit into pre-existing zoogeographical provinces (Carolinian, Nova Scotian, and Abyssal Atlantic subarea), but a new province (Atlantic Transitional) is proposed for the slope. Sipunculans in the Virginian Province are extremely rare. Two pieces of evidence support the concept that abyssal, cold-water fauna is ancestral to the warmer, shallow-water fauna"--P. 107.
format Text
author Cutler, Edward Bayler.
author_facet Cutler, Edward Bayler.
author_sort Cutler, Edward Bayler.
title Sipuncula of the western North Atlantic. Bulletin of the AMNH
title_short Sipuncula of the western North Atlantic. Bulletin of the AMNH
title_full Sipuncula of the western North Atlantic. Bulletin of the AMNH
title_fullStr Sipuncula of the western North Atlantic. Bulletin of the AMNH
title_full_unstemmed Sipuncula of the western North Atlantic. Bulletin of the AMNH
title_sort sipuncula of the western north atlantic. bulletin of the amnh
publisher New York : [American Museum of Natural History]
publishDate 1973
url http://hdl.handle.net/2246/601
long_lat ENVELOPE(-64.074,-64.074,-64.753,-64.753)
geographic Cape Kennedy
geographic_facet Cape Kennedy
genre North Atlantic
genre_facet North Atlantic
op_relation Bulletin of the American Museum of Natural History
v. 152, article 3
http://hdl.handle.net/2246/601
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