Abstract
Few investigations have examined the occurrence of zooplankton resting eggs in the sea bed of waters deeper than 20 m. In this study the distribution and abundance of planktonic copepods and their benthic resting eggs in coastal waters off northern California, U.S.A., were determined and related to environmental parameters (temperature, salinity, depth, and sediment grain size). Sediment cores, net tows, and CTD profiles were obtained in April and October 1989, and February, April, and October 1990. Water depths in the study area ranged from approximately 60 to 120 m. The mean abundance of eggs was as high as 1.2×105 m-2 for Acartia clausi Giesbrecht and 1.9×105 m-2 for Tortanus discaudatus Thompson and Scott. These egg concentrations are comparable to those reported previously for shallower more protected regions. The abundance of eggs in the sediments decreased with increasing depth of the water column. For the region as a whole, eggs were least abundant in muddy sediments. The mean abundance of eggs in the sea bed also varied seasonally and annully. Benthic resting eggs of A. clausi were more abundant in April 1989 than in April 1990, and adults of the species were never found in the plankton samples. The lack of adults is not unusual since results of previous studies indicate that A. clausi is a cold-water species, and in this region water temperatures are colder in summer, than in winter, due to upwelling. Temperature and salinity data indicated that the upwelling season had commenced by the time of the April 1990, but not the April 1989 sampling. Thus, the reduced abundance of benthic eggs in April 1990 may have been due to egg-hatching in response to reduced temperatures. The results suggest that the presence of A. clausi in coastal waters off northern California is linked to recruitment from benthic resting eggs.
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References
Cacchione D, Drake D, Grant W, Williams A, Tate G (1983) Variability of sea floor roughness within the coastal ocean dynamics experiment (CODE) region. Tech Rep Woods Hole oceanogr Instn 83–25
Conway DVP, McFadzen IRB, Tranter PRG (1994) Digestion of copepod eggs by larval turbot Scophthalmus maximus and egg viability following gut passage. Mar Ecol Prog Ser 106: 303–309
Craib J (1965) A sampler for taking short undisturbed marine cores. J Cons perm int Explor Mer 30: 34–39
Drake D, Cacchione D (1985) Seasonal variation in sediment transport on the Russian River shelf, California. Contin Shelf Res 4: 495–514
Fleminger A (1964) Distributional atlas of calanoid copepods in the California Current region. Part I. Calcofi Atlas No. 2, ix–xvi. Scripps Istitution of Oceanography, La Jolla, California pp 1–313
Fleminger A (1967) Distributional atlas of calanoid copepods in the California Current region. Part II. Calcofi Atlas No. 7, vii–xvi. Scripps Istitution of Oceanography, La Jolla, California, pp 1–313
Folk RL (1980) Petrology of sedimentary rocks. 2nd edn. Hemphill, Austin, Texas
Grice G, Gibson V (1975) Occurrence, viability, and significance of resting eggs of the calanoid copepod, Labidocera aestiva. Mar Biol 31: 335–337
Kasahara S, Uye S, Onbe T (1974) Calanoid copepod eggs in sea-bottom muds. Mar Biol 26: 167–171
Kasahara S, Uye S, Onbe T (1974) Calanoid copepod eggs in sea-bottom muds. II. Seasonal cycles of abundance in the populations of several species of copepods and their eggs in the Inland Sea of Japan. Mar Biol 31: 25–29
Lentz SJ (1987) A description of the 1981 and 1982 spring transition over the northern California shelf. J geophys Res 92:1545–1567
Lindley JA (1986) Dormant eggs of calanoid copepods in sea-bed sediments of the English Channel and southern North Sea. J Plankton Res 8: 399–400
Lindley JA (1990) Distribution of overwintering calanoid copepod eggs in sea-bed sediments around southern Britain. Mar Biol 104: 209–217
Marcus NH (1984) Recruitment of copepod nauplii into the plankton: importance of diapause eggs and benthic processes. Mar Ecol Prog Ser 15: 47–54
Marcus NH (1989) Abundance in bottom sediments and hatching requirements of eggs of Centropages hamatus (Copepoda: Calanoida) from the Alligator Harbor region, Florida. Biol Bull mar biol Lab, Woods Hole 176: 142–146
Marcus NH (1990) Calanoid copepod, cladoceran, and rotifer eggs in sea-bottom sediments of northern California coastal waters: identification, occurrence, and hatching. Mar Biol 105: 413–418
Marcus NH (1991) Planktonic copepods in a sub-tropical estuary: seasonal patterns in the abundance of adults, copepodites, nauplii, and eggs in the sea bed. Biol Bull mar biol Lab, Woods Hole 181: 269–274
Marcus NH, Fuller CM (1986) Subitaneous and diapause eggs of Labidocera aestiva Wheeler (Copepoda: Calanoida): differences in fall velocity and density. J exp mar Biol Ecol 99: 247–256
Marcus NH, Fuller CM (1989) Distribution and abundance of eggs of Labidocera aestiva (Copepoda: Calanoida) in the bottom sediments of Buzzards Bay, Massachusetts, USA. Mar Biol 100: 319–326
Marcus NH, Lutz RV, Burnett W, Cable P (1994) Age, viability, and vertical distribution of zooplankton resting eggs from an anoxic basin: evidence of egg bank. Limnol Oceanogr 39: 154–158
Naess T (1991) Marine calanoid resting eggs in Norway: abundance and distribution of two copepod species in the sediments of an enclosed marine basin. Mar Biol 110: 261–266
Omori M, Ikeda T (1984) Methods in marine zooplankton ecology. John Wiley and Sons, New York
Onbe T (1978) Distribution of resting eggs of marine cladocerans in the bottom sediments of Ise Bay and Uragami Inlet, Central Japan. Bull Jap Soc scient Fish 44: p 1053
Peterson WT, Miller CB (1977) Seasonal cycle of zooplankton abundance and species composition along the central Oregon coast. Fish Bull U.S. 75: 717–724
Quarta S, Piccinni MR, Geraci S, Boero F (1992) Isolation of resting stages of planktonic organisms from fine grained sediments. Oebalia (Taranto, Italy) 18: 121–128
Snell TW, Burke BE, Messur SD (1983) Size and distribution of resting eggs in a natural population of a rotifer, Brachionus plicatilis. Gulf Res Rep 7: 285–287
Strub PT, Allen JS, Huyer A, Smith RL, Beardsley RC (1987) Seasonal cycles of currents,temperature, winds, and sea level over the northeast Pacific continental shelf; 35°N to 48°N. J geophys Res 92: 1507–1526
Uye S (1980) Development of neritic copepods Acartia clausi and A. steuri. I. Some environmental factors affecting egg development and the nature of resting eggs. Bull Plankton Soc Japan 27: 1–9
Uye S (1983) Seasonal cycles in abundance of resting eggs of Acartia steuri Smirnov (Copepoda: Calanoida) in sea-bottom mud of Onagawa Bay, Japan. Crustaceana 44: 103–105
Uye S, Fleminger A (1976) Effects of vaious environmental factors on egg development of several species of Acartia in southern California. Mar Biol 38: 253–262
Uye S, Kasahara S (1978) Life history of marine planktonic copepods in neritic region with special reference to the role of resting eggs. Bull Plankton Soc Japan 25: 109–122
Viitasalo M (1992) Calanoid resting eggs in the Baltic Sea: implications for the population dynamics of Acartia bifilosa (Copepoda). Mar Biol 114: 397–405
Wheatcroft RA (1994) Temporal variation in bed configuration and one-dimensional bottom roughness at the mid-shelf STRESS site. Contin Shelf Res 14: 1167–1190
Zhong XF, Xiao YC (1992) Resting eggs of Acartia bifilosa Giesbrecht and A. pacifica Steuer in Jiaozhou Bay. Mar Sciences (Qingdao) 5: 55–59
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Communicated by J.P. Grassle, New Brunswick
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Marcus, N.H. Seasonal study of planktonic copepods and their benthic resting eggs in northern California coastal waters. Marine Biology 123, 459–465 (1995). https://doi.org/10.1007/BF00349225
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DOI: https://doi.org/10.1007/BF00349225