87:6464 Population dynamics of Weddell seals (Leptonychotes weddelli) in McMurdo Sound, Antarctica
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986 E. Biological Oceanography O LR (1987) 34 (I 1) 87:6461 Wilkerson, F.P. and R.C, Dugdale, 1987. The use of large shipboard barrels and drifters to study the effects of coastal upweliing on phytoplankton dynamics. Limnol. Oceanogr., 32(2):368-382. During the OPUS (Organization of Persistent Up- welling Structures) study of the upwelling center at Point Conception, California, large (380 liter) plastic shipboard enclosures (barrels) were tested as exper- imental tools to study phytoplankton processes in isolation from variability in circulation and grazing. The results showed the same trends as those obtained with Lagrangian sampling along drifter tracks initiated at the same time and place as the barrels. Our hypothesis that the initial nutrient concentration has an effect on the rate of shift-up was substantiated. Allan Hancock Fdn., Univ. of Southern Calif., Los Angeles, CA 90089-0371, USA. 87:6462 Wishner, K.F. and M.M. Gowing, 1987. In-situ filtering and ingestion rates of deep-sea benthic boundary-layer zooplankton in the Santa Catalina Basin. Mar. Biol., 94(3):357-366. Grad. School of Oceanogr., Univ. of Rhode Island, Narragansett, RI 02882, USA. 87:6463 Zimmerman, R.C., J.N. Kremer and R.C. Dugdale, 1987. Acceleration of nutrient uptake by phy- toplankton in a coastal upwelling ecosystem: a modeling analysis. Limnol. Oceanogr., 32(2):359- 367. Studies of upwelling centers in the eastern Pacific suggest that maximum rates of nitrate uptake (light and nutrient saturated) increase, or shift-up, as newly upwelled water moves downstream. The rate of shift-up appears to be related to irradiance and the ambient concentration of limiting nutrient at the time of upwelling. A mathematical model was developed to evaluate effects of irradiance and initial nitrate concentration on temporal patterns of shift- up and subsequent time scales of nutrient utilization over a range of simulated upwelling conditions. When rates consistent with field studies were used, complete shift-up was possible only under certain conditions, and the time scale was on the order of 7-10 d. Hopkins Mar. Station, Pacific Grove, CA 93950, USA. EIO0. Nekton (communities; also fish, rep- tiles, mammals) 87:6464 Testa, J.W. and D.B. Siniff, 1987. Population dynamics of Weddell seals (Leptonychotes wed. delh) in McMurdo Sound, Antarctica. Ecol. Monogr., 57(2): 149-165. Inst. of Mar. Sci., Univ. of Alaska, Fairbanks, AK 99775-1080, USA. ELI0. Bottom communities 87:6465 Ansari, Z.A., B.S. Ingole, G. Banerjee and A.H. Parulekar, 1986. Spatial and temporal changes in benthic macrofauna from Mandovi and Zuari estuaries of Goa, west coast of India. Indian J. mar. Sci., 15(4):223-229. Sixty-nine species were recorded from 6 stations. Maximum density (2425 m 2) was observed during pre- and post-monsoon and minimum (650 m 2) during monsoon season. Polychaetes were dominant in both estuaries followed by Crustacea and Mol- lusca. There was about 40% reduction in the population density and species composition as compared with an earlier study of 1971-73. The implication of this variability and the utilization of quantitative benthic information in pollution impact studies are discussed. Natl. Inst. of Oceanogr., Dona Paula, Goa 403 004, India. 87:6466 Bosman, A.L., P.A.R. Hockey and W.R. Siegfried, 1987. The influence of coastal upwelling on the functional structure of rocky intertidal commu- nities. Oecologia, 72(2):226-232. Mid-shore community structure at study sites on rocky shores in southern Africa, central Chile and the Canary Islands (in areas with and without coastal upwelling), was analysed in terms of the abundance of certain functional guilds of organisms. Algal cover and biomass of herbivorous limpets supported per unit area were significantly greater in regions of coastal upwelling. Ground cover by sessile filter-feeding organisms was significantly greater on shores in non-upwelled areas. However, correspon- dence analysis showed no functional aspect of intertidal community structure that was character- istic of coasts washed by upwelled waters. Fitz- Patrick Inst. of African Ornithol., Univ. of Cape Town, Rondebosch 7700, South Africa. 87:6467 Gorzelany, J.F. and W.G. Nelson, 1987. The effects of beach replenishment on the benthos of a subtropical Florida beach. Mar. environ. Res., 21(2):75-94. Mote Mar. Lab., 1600 City Island Park, Sarasota, FL 33577, USA. 87:6468 Guzman Mendez, Leonardo and Carlos Rios Cardoza, 1986. Structure analysis in intertidal
Transcript of 87:6464 Population dynamics of Weddell seals (Leptonychotes weddelli) in McMurdo Sound, Antarctica
986 E. Biological Oceanography O LR (1987) 34 (I 1)
87:6461 Wilkerson, F.P. and R.C, Dugdale, 1987. The use of
large shipboard barrels and drifters to study the effects of coastal upweliing on phytoplankton dynamics. Limnol. Oceanogr., 32(2):368-382.
During the OPUS (Organization of Persistent Up- welling Structures) study of the upwelling center at Point Conception, California, large (380 liter) plastic shipboard enclosures (barrels) were tested as exper- imental tools to study phytoplankton processes in isolation from variability in circulation and grazing. The results showed the same trends as those obtained with Lagrangian sampling along drifter tracks initiated at the same time and place as the barrels. Our hypothesis that the initial nutrient concentration has an effect on the rate of shift-up was substantiated. Allan Hancock Fdn., Univ. of Southern Calif., Los Angeles, CA 90089-0371, USA.
87:6462 Wishner, K.F. and M.M. Gowing, 1987. In-situ
filtering and ingestion rates of deep-sea benthic boundary-layer zooplankton in the Santa Catalina Basin. Mar. Biol., 94(3):357-366. Grad. School of Oceanogr., Univ. of Rhode Island, Narragansett, RI 02882, USA.
87:6463 Zimmerman, R.C., J.N. Kremer and R.C. Dugdale,
1987. Acceleration of nutrient uptake by phy- toplankton in a coastal upwelling ecosystem: a modeling analysis. Limnol. Oceanogr., 32(2):359- 367.
Studies of upwelling centers in the eastern Pacific suggest that maximum rates of nitrate uptake (light and nutrient saturated) increase, or shift-up, as newly upwelled water moves downstream. The rate of shift-up appears to be related to irradiance and the ambient concentration of limiting nutrient at the time of upwelling. A mathematical model was developed to evaluate effects of irradiance and initial nitrate concentration on temporal patterns of shift- up and subsequent time scales of nutrient utilization over a range of simulated upwelling conditions. When rates consistent with field studies were used, complete shift-up was possible only under certain conditions, and the time scale was on the order of 7-10 d. Hopkins Mar. Station, Pacific Grove, CA 93950, USA.
EIO0. Nekton (communities; also fish, rep- tiles, mammals)
87:6464 Testa, J.W. and D.B. Siniff, 1987. Population
dynamics of Weddell seals (Leptonychotes wed.
delh) in McMurdo Sound, Antarctica. Ecol. Monogr., 57(2): 149-165. Inst. of Mar. Sci., Univ. of Alaska, Fairbanks, AK 99775-1080, USA.
ELI0. Bottom communities
87:6465 Ansari, Z.A., B.S. Ingole, G. Banerjee and A.H.
Parulekar, 1986. Spatial and temporal changes in benthic macrofauna from Mandovi and Zuari estuaries of Goa, west coast of India. Indian J. mar. Sci., 15(4):223-229.
Sixty-nine species were recorded from 6 stations. Maximum density (2425 m 2) was observed during pre- and post-monsoon and minimum (650 m 2) during monsoon season. Polychaetes were dominant in both estuaries followed by Crustacea and Mol- lusca. There was about 40% reduction in the population density and species composition as compared with an earlier study of 1971-73. The implication of this variability and the utilization of quantitative benthic information in pollution impact studies are discussed. Natl. Inst. of Oceanogr., Dona Paula, Goa 403 004, India.
87:6466 Bosman, A.L., P.A.R. Hockey and W.R. Siegfried,
1987. The influence of coastal upwelling on the functional structure of rocky intertidal commu- nities. Oecologia, 72(2):226-232.
Mid-shore community structure at study sites on rocky shores in southern Africa, central Chile and the Canary Islands (in areas with and without coastal upwelling), was analysed in terms of the abundance of certain functional guilds of organisms. Algal cover and biomass of herbivorous limpets supported per unit area were significantly greater in regions of coastal upwelling. Ground cover by sessile filter-feeding organisms was significantly greater on shores in non-upwelled areas. However, correspon- dence analysis showed no functional aspect of intertidal community structure that was character- istic of coasts washed by upwelled waters. Fitz- Patrick Inst. of African Ornithol., Univ. of Cape Town, Rondebosch 7700, South Africa.
87:6467 Gorzelany, J.F. and W.G. Nelson, 1987. The effects
of beach replenishment on the benthos of a subtropical Florida beach. Mar. environ. Res., 21(2):75-94. Mote Mar. Lab., 1600 City Island Park, Sarasota, FL 33577, USA.
87:6468 Guzman Mendez, Leonardo and Carlos Rios
Cardoza, 1986. Structure analysis in intertidal
