Distribution of living coccolithophore assemblages in the Gulf of Elat ('Aqaba)

Winter, Amos; Reiss, Zeev; Luz, Boaz

doi:10.1016/0377-8398(79)90017-3

Cited by 85 publications

(49 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For example, ultraphytoplankton, including Synechococcus and small eukaryotic cells, were uniformly distributed throughout a 600 m deep mixed layer during the cold winter of /1993(Lindell & Post 1995, indicative of their passive entrainment by mixing. A similar homogeneous distribution in the mixed layer was reported for large (> 65 µm) diatoms and dinoflagellates during winter 1975 (Kimor & Golandsky 1977) and for coccolithophores in February 1976 (Winter et al 1979). Likewise, the extended distribution of typical Red Sea epipelagic oncaeid species down to 300 m depth in the Gulf during winter 1999 was also ascribed to the nearly homogeneous and well oxygenated water column (Böttger-Schnack et al 2001).…”

Section: Introductionsupporting

confidence: 74%

“…Profiles with less than a total of 1500 ind. m -2 (integrated over the entire water column) were omitted from the analysis Spreading and homogeneity in the vertical distribution of phytoplankton in deeply mixed water columns were observed at our study site (Kimor & Golandsky 1977, Winter et al 1979, Lindell & Post 1995 as well as at many other regions worldwide (Sverdrup 1953, Pingree et al 1975, Bradford et al 1982, Zohary et al 1998). Deep mixing is obviously deleterious for phytoplankton, as the cells which are mixed down to aphotic layers (as much as 85% in the Gulf of Aqaba in February) cannot photosynthesize.…”

Section: Discussionmentioning

confidence: 99%

“…Seasonal conditions change; from stratification with a very shallow (0 to 30 m) windmixed layer during the warm months (May to September) to deep convective mixing, extending several hundred meters below the surface during the winter (Reiss & Hottinger 1984, Wolf-Vecht et al 1992, Genin et al 1995. Reports from that region attributed the observed seasonality in the community structure of ultraphytoplankton (Lindell & Post 1995), coccolithophores (Winter et al 1979) and microplankton (Kimor & Golandsky 1977) to water-column stability and the degree of mixing. For example, ultraphytoplankton, including Synechococcus and small eukaryotic cells, were uniformly distributed throughout a 600 m deep mixed layer during the cold winter of /1993(Lindell & Post 1995, indicative of their passive entrainment by mixing.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Expansion and homogeneity of the vertical distribution of zooplankton in a very deep mixed layer

Farstey¹,

Lazar²,

Genin³

2002

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

During stratification over 70% of the zooplankton >100 µm in the Gulf of Aqaba (Eilat), Red Sea, resided in the upper 100 m. In the course of winter mixing, the vertical pattern became more homogeneous, reaching an almost complete uniformity when the vertical mixing exceeded 500 m depth. The zooplankton expanded its vertical distribution throughout the mixed layer. However, full homogeneity, such as would be expected for a passive tracer and observed for phytoplankton, occurred for zooplankton only in the upper section of the mixed layer. Homogeneity occurred for zooplankton passing through 750 µm mesh but not for larger crustaceans. The copepod Pleuromamma indica retained its diel vertical migration regardless of mixing but expanded its nocturnal range under mixing conditions. The observed homogeneity of zooplankton could have been reached either by passive entrainment with the mixing water or by isotropic swimming of the animals, or both. The ecological implications of the expansion of zooplankton distribution for predator-prey relationships and particle fluxes are discussed. KEY WORDS: Plankton · Vertical mixing · Red SeaResale or republication not permitted without written consent of the publisher

show abstract

Section: Introductionsupporting

confidence: 74%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Expansion and homogeneity of the vertical distribution of zooplankton in a very deep mixed layer

Farstey¹,

Lazar²,

Genin³

2002

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

show abstract

“…Schneidermann (1977) reported richness decreases toward polar regions. Winter et al (1979) found higher richness can correlate with high water temperature (summer) and low richness in cool winter period. Okada and McIntyre (1979) also reported higher diversity in late summer or autumn in the North Atlantic Ocean.…”

Section: Paleoclimatic and Paleoceanographic History Of Hole 959cmentioning

confidence: 80%

“…Honjo and Okada (1974) showed that modern day coccolith richness is highest in the equatorial zone. Winter et al (1979) demonstrated that high species richness in modern nannoplankton communities is correlated with high water temperatures, and low diversity is characteristic of relatively cool periods. Haq (1971) showed greater calcareous nannofossil species richness at climatic warming during the Paleogene period.…”

Section: Paleoclimatic and Paleoceanographic History Of Hole 959cmentioning

confidence: 99%

PliocenePleistocene paleoclimatic and paleoceanographic history of Site 959, eastern equatorial Atlantic Ocean

Shin¹

1998

Proceedings of the Ocean Drilling Program, 159 Scientific Results

View full text Add to dashboard Cite

Pliocene-Pleistocene paleoclimatic and paleoceanographic variables were examined based on the number (in 20 view fields) and relative abundances of calcareous nannofossil F. profunda, number of discoasters in 20 view fields, relative abundances of warm-and cool-water indicator calcareous nannofossils, and the species diversity indices S, H(S), and E. The early Pliocene is characterized by relatively shallow nutricline (by proxy, thermocline) compared to the late Pliocene as evidenced by lower relative abundances of F. profunda. The early Pliocene contains a higher abundance of discoasters, warm-water indicator calcareous nannofossils, and the species diversity indices S, H(S), and E all suggest warm and stable surface-water conditions. The late Pliocene contains the highest relative abundance of F. profunda, indicating the deepest nutricline and, by proxy, thermocline. Climatic shift and changes in nutricline/thermocline occurred between 2.82 and 3.03 Ma. The surface-water temperature became cool, the thermocline/nutricline depth became shallower, and the primary productivity began to get higher starting from the early late Pliocene (2.82 Ma) to the latest Pleistocene. These paleoceanographic events are shown by significant changes in both number and relative abundances of F. profunda, relative abundances of warm-water indicator calcareous nannofossils, and by the species diversity indices from the early late Pliocene (upper part of Subzone CN 12a; 2.82 Ma) through the latest Pleistocene. The early Pleistocene shows greater variations of the relative abundances of F. profunda and warm-water nannofossils, suggesting unstable and great fluctuation of surface-water temperature and nutricline/thermocline depth. Another climatic cooling starting approximately 2.4 Ma, also shown by the decreasing relative abundances of F. profunda, by warmwater indicator nannofossils, and by the species diversity indices for the younger sediment. The middle and late Pleistocene contain the lowest relative abundances of F. profunda, suggesting the shallowest thermocline/nutricline.

show abstract

Coccolithophore responses to the Pacific Decadal Oscillation in the East China Sea region of the Northwest Pacific from ad 1901 to 2013

Yang

Yuan

Yang

et al. 2019

J Quaternary Science

View full text Add to dashboard Cite

A high‐resolution study of coccolithophores in a sediment core from the East China Sea (ECS) region of the Northwest Pacific revealed that fluctuations in coccolithophore assemblages responded well to the Pacific Decadal Oscillation (PDO) during 1901–2013. Emiliania huxleyi and Gephyrocapsa oceanica were the most dominant species, accounting for more than 97% of all the ten detected species. The variation of the two dominant species showed a significant positive correlation, and they both increased during peak values of the PDO. Decreased stratification and increased nutrient supplementation from the bottom water induced by lower sea surface temperatures in the ECS, which were associated with high PDO values, were responsible for the dominant coccolithophore increase. Similarly, the increase of Calcidiscus leptoporus also corresponded to low‐temperature and high‐nutrient conditions associated with the cold phase in the ECS (positive phase of the PDO). The responses of decadal C. leptoporus variations to changes in cold and warm phases of the PDO in the Northwest and Northeast Pacific indicate that C. leptoporus preserved in sediment cores represents a potential indicator for reconstructing phase changes of the PDO during ancient times.

show abstract

Distribution of living coccolithophore assemblages in the Gulf of Elat ('Aqaba)

Cited by 85 publications

References 28 publications

Expansion and homogeneity of the vertical distribution of zooplankton in a very deep mixed layer

Expansion and homogeneity of the vertical distribution of zooplankton in a very deep mixed layer

PliocenePleistocene paleoclimatic and paleoceanographic history of Site 959, eastern equatorial Atlantic Ocean

Coccolithophore responses to the Pacific Decadal Oscillation in the East China Sea region of the Northwest Pacific from ad 1901 to 2013

Contact Info

Product

Resources

About

Distribution of living coccolithophore assemblages in the Gulf of Elat ('Aqaba)

Cited by 85 publications

References 28 publications

Expansion and homogeneity of the vertical distribution of zooplankton in a very deep mixed layer

Expansion and homogeneity of the vertical distribution of zooplankton in a very deep mixed layer

PliocenePleistocene paleoclimatic and paleoceanographic history of Site 959, eastern equatorial Atlantic Ocean

Coccolithophore responses to the Pacific Decadal Oscillation in the East China Sea region of the Northwest Pacific from ad 1901 to 2013

Contact Info

Product

Resources

About

PliocenePleistocene paleoclimatic and paleoceanographic history of Site 959, eastern equatorial Atlantic Ocean