TY - JOUR
T1 - Phytohydrography, Gulf Stream rings, and herbivore habitat contrasts
AU - Ortner, Peter B.
AU - Hulburt, Edward M.
AU - Wiebe, Peter H.
N1 - Funding Information:
J. F. Grassle? L. Murphy and J. McCarthy made numerous helpful suggestions regarding early drafts of this manuscript. R. Haedrich, W. Smith and R. Goldsmith helped with computer and statistical techniques. This study was supported by ONR NOOO14-66-C-0240; NOOO14-24-C-0262 NR 083-004, NSF DES74-02783A1, the Woods Hole Oceanographic Institution Graduate Education Program. and the Tai Ping Foundation.
PY - 1979/6/14
Y1 - 1979/6/14
N2 - The Gulf Stream constitutes a major ecological discontinuity separating two distinct phytohydrographic provinces: the Slope Water and the Northern Sargasso Sea. Differences between phytoplankton assemblages are maximal above well-established seasonal thermoclines. Due to systematic differences in the composition, quantity, distribution, and variability of their phytoplankton assemblages, the upper euphotic zones of the Slope Water and the Northern Sargasso Sea represent very different herbivore habitats. Although the Northern Sargasso Sea has been thought to be a relatively monotonous biogeographic province, within its geographic boundaries Gulf Stream cold core rings constitute largescale floral non-homogeneities. The rings observed differed markedly in species composition from both the Slope Water and the Northern Sargasso Sea. Although species groups isolated by correspondence analysis were not strictly confined to one or another phytohydrographic province they represented ecotypes differing in their apparent 'responsiveness' to variation in nutrient concentration.
AB - The Gulf Stream constitutes a major ecological discontinuity separating two distinct phytohydrographic provinces: the Slope Water and the Northern Sargasso Sea. Differences between phytoplankton assemblages are maximal above well-established seasonal thermoclines. Due to systematic differences in the composition, quantity, distribution, and variability of their phytoplankton assemblages, the upper euphotic zones of the Slope Water and the Northern Sargasso Sea represent very different herbivore habitats. Although the Northern Sargasso Sea has been thought to be a relatively monotonous biogeographic province, within its geographic boundaries Gulf Stream cold core rings constitute largescale floral non-homogeneities. The rings observed differed markedly in species composition from both the Slope Water and the Northern Sargasso Sea. Although species groups isolated by correspondence analysis were not strictly confined to one or another phytohydrographic province they represented ecotypes differing in their apparent 'responsiveness' to variation in nutrient concentration.
UR - http://www.scopus.com/inward/record.url?scp=1842325785&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=1842325785&partnerID=8YFLogxK
U2 - 10.1016/0022-0981(79)90008-X
DO - 10.1016/0022-0981(79)90008-X
M3 - Article
AN - SCOPUS:1842325785
VL - 39
SP - 101
EP - 124
JO - Journal of Experimental Marine Biology and Ecology
JF - Journal of Experimental Marine Biology and Ecology
SN - 0022-0981
IS - 2
ER -