988 E. Biological Oceanography O LR (1987) 34 (I I)

attenuation by the epiphytes reduced leaf photo- synthesis at low light, but neither light attenuation nor impedance of gas exchange altered photosyn- thetic rate at the high intensities characteristic of midday. Freshwater Biol. Lab., Univ. of Copen- hagen, Helsingorsgade 51, DK-3400 Hillerod, Den- mark.

87:6477 Zhou, Shiqiang and Fuxue Li, 1986. Community

ecology of benthic macrofauna dwelling on man- grove trees in the Jiulong Jiang Estuary, Fujian [China]. Taiwan Strait, 5(1):78-85. (In Chinese, English abstract.) Dept. of Oceanogr., Xiamen Univ., People's Republic of China.

El40. Birds

87:6478 Able, K.P., 1987. Geomagnetic disturbance and

migratory bird orientation: is there an effect? Anim. Behav., 35(2):599-601.

Behavioral effects of earth-strength magnetic fields on passerine nocturnal migrants were studied by recording the birds' mean flight direction and deviation during the autumn and spring for a number of years at three eastern U.S. stations and comparing the observed dispersion with the intensity of magnetic disturbances recorded at the magnetic observatory at Fredericksburg (Virginia). Analysis of the data revealed no significant relationship between the two and does not support Moore's (1977) report of a strong relationship between orientation accu- racy and magnetic storm intensity. Dept. of Biol., SUNY, Albany, NY 12222, USA. 0abf)

87:6479 Vermeer, Kees, Ildy Szabo and Paul Greisman, 1987.

The relationship between plankton-feeding Bo- naparte's and mew gulls and tidal upweiling at Active Pass, British Columbia. J. Plankt. Res., 9(3):483-501. Canadian Wildlife Serv., c/o Inst. of Ocean Sci., P.O. Box 6000, Sidney, BC, V8L 4B2, Canada.

El50. Microbiology (communities, pro- cesses; also bacteria, fungi, yeasts, viruses, etc.)

87:6480 Caron, D.A., 1987. Grazing of attached bacteria by

heterotrophic microflagellates. Microb. Ecol., 13(3):203 -218.

Two species of microflagellates (Monas and Cryp- tobia sp.) efficiently grazed unattached bacteria but showed little or no ability to graze attached or aggregated cells, while Rhynchomonas nasuta and Bodo sp. showed marked preferences for attached and aggregated bacteria and a limited ability to graze unattached cells. The pelagic existence of microflagellates that graze attached bacteria may be strongly linked to the distribution of suspended particles and their associated bacteria, and removal of attached bacteria by microflagellates may signif- icantly affect bacterial density. This activity may have important implications for the controversy concerning the relative importance of attached and free-living bacteria in the plankton. Biol. Dept., WHOI, Woods Hole, MA 02543, USA.

87:6481 Gautheir, M.J., P.M. Munro and Soussan Mohajer,

1987. Influence of salts and sodium chloride on the recovery of Eschericlda coli from seawater. Curt. Microbiol., 15(1):5-10.

Some E. coil cells were apparently able to adapt to the high salinity of seawater when previously grown on medium containing NaC1. In general, recovery on a complex organic medium plus NaC1 after seawater exposure was dependent on strain, starvation time, and salinity. Inst. Natl. de la Sante et de la Recherche Medicale, Unite 303, 1 ave. Jean Lorrain, F-06300 Nice, France. (gsb)

87:6482 Kannan, L. and K. Vasantha, 1986. Distribution of

heterotrophic bacteria in Vellar Estuary, east coast of India. Indian J. mar. Sci., 15(4):267-268. Centre of Advanced Study in Mar. Biol., Annamalai Univ., Porto Novo 608 502, India.

87:6483 Nagasawa, Sachiko, 1986. High incidence of cope-

pod-bacteria associations in Tokyo Bay waters and Woods Hole waters. Mer, Tokyo, 24(4):177- 185. Ocean Res. Inst., Univ. of Tokyo, Minami- dai 1-15-1, Nakano-ku, Tokyo, 164, Japan.

87:6484 Paerl, H.W. and L.E. Prufert, 1987. Oxygen-poor

microzones as potential sites of microbial N 2 fixation in nitrogen-depleted aerobic marine waters. Appl. environ. Microbiol., 53(5):1078- 1087.

The nitrogen-deficient coastal waters of North Carolina contain suspended bacteria potentially able to fix N2; DOC and POC additions elicited and enhanced N2 fixation (nitrogenase activity) in these waters. In all cases bacterial N 2 fixation occurred in