Distribution and Ecology of <i>Ceratium egyptiacum</i> Halim and its Validity as Indicator of the Current Regime in the Suez Canal

Dowidar, N. M.

doi:10.1002/iroh.19710560606

Cited by 14 publications

(10 citation statements)

References 5 publications

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“…An advantage offered by this genus is that identification to species level is more feasible than for other phytoplanktonic groups, where it can be limited by the small size of the organisms or may require the use of electron microscopy and molecular tools. Moreover, Ceratium species are known to be sensitive to temperature in terms of biogeography (Dodge & Marshall 1994), seasonality and morphology (Sournia 1967), and have hence been proposed as biological indicators of water masses (Dodge 1993, Okolodkov 1996, Ochoa & Gómez 1997, Sanchez et al 2000, Raine et al 2002, current regimes (Dowidar 1973) and climate change (Dodge & Marshall 1994, Johns et al 2003. In the northwestern Mediterranean Sea, the genus is species-rich and often dominates the armoured dinoflagellates in terms of abundance (Tunin-Ley et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Phytoplankton biodiversity and NW Mediterranean Sea warming: changes in the dinoflagellate genus Ceratium in the 20th century

Tunin‐Ley¹,

Ibañez²,

Labat³

et al. 2009

Mar. Ecol. Prog. Ser.

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Our knowledge of the response of phytoplankton to climate change is restricted by the lack of phytoplankton long-term studies, especially those reporting species data. To circumvent this problem, we combined recent data from sampling at monitoring sites with old bibliographic data. The study was conducted on the genus Ceratium (planktonic dinoflagellates) in the NW Mediterranean, as numerous studies have been conducted in the area since the beginning of the 20th century. In addition, species of this highly diverse genus are known to be particularly sensitive to water temperature, and should thus be responsive to global warming. The temporal distribution of Ceratium species over the last century showed a progressive disappearance from the surface layer of likely stenothermic species, which may have moved to deeper layers in response to water warming, along with a decrease of species richness during the annual cycle. Seasonal and phenological aspects of Ceratium assemblages were also affected, as illustrated by the earlier timing in the minimum of richness. A change in the overall species assemblage also occurred from past to present in the Ligurian Sea, suggesting a warming in this area consistent with the development in surface water temperatures. Our results suggest that Ceratium species may constitute good biological indicators of warming in the NW Mediterranean Sea. In addition, the present study showed the importance of time-series data and the value of historical literature as the basis for ecological studies of long-term trends needed to substantiate our current understanding of the impact of global change on marine biodiversity. KEY WORDS: Ceratium · Phytoplankton · Climate change · Long-term series · Mediterranean · Biodiversity · Biological indicator · Historical ecology Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 375: [85][86][87][88][89][90][91][92][93][94][95][96][97][98][99] 2009 Gentili 1996, Johnson 1997, Marbà & Duarte 1997, although periodic patterns such as the 22 to 25 yr period of solar activity may overlay the monotonic trends and mask them (Duarte et al. 1999). Nutrient concentrations, particularly phosphate and nitrogen, have also increased from the early 1960s, probably due to increasing atmospheric and terrestrial inputs, while concentration in silicate has remained relatively constant (Béthoux et al. 2002).Using different approaches, a number of studies have provided information on the temporal distribution of Mediterranean Sea phytoplankton (Duarte et al. 1999, Goffart et al. 2002, Marty et al. 2002, Gómez & Gorsky 2003, Bosc et al. 2004, Ribera d'Alcalà et al. 2004. Some of these studies show changes in phytoplankton in the NW Mediterranean in relation to climatic forcing. Pigment analysis over a decade revealed a positive trend in phytoplankton biomass in response to the lengthening of the summer stratification, accompanied by an increase of small-sized phytoplankton (picoplankton and nanoflagellates) able to support re...

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Section: Introductionmentioning

confidence: 99%

Phytoplankton biodiversity and NW Mediterranean Sea warming: changes in the dinoflagellate genus Ceratium in the 20th century

Tunin‐Ley¹,

Ibañez²,

Labat³

et al. 2009

Mar. Ecol. Prog. Ser.

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“…Several authors studied the phytoplankton distribution in some regions of the Suez Canal like Dowidar (1971Dowidar ( , 1976, Dorgham and Dowidar (1983), Dorgham (1985Dorgham ( , 1990, ElSherif and Ibrahim (1993), and Madkour (2000). Touliabah and Taylor (2004) examined the impact of sewage and agricultural wastes as well as the heated effluents from Abu-Sultan electric power station on the phytoplankton community of the lakes.…”

Section: Introductionmentioning

confidence: 99%

Effects of some environmental factors on the population density and species diversity of phytoplankton in Bitter Lakes, Egypt

Nassar

Fahmy

2015

Rend. Fis. Acc. Lincei

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The assessment of the phytoplankton community structure in the Bitter Lakes during 2012-2013 indicated about 150 species belonging to 73 genera. These are classified as 89 species of diatoms, 27 dinoflagellates, 19 chlorophytes, 13 cyanophytes, and one of euglenophytes as well as one rare species of silicoflagellates. Diatoms were the leading and most dominant group forming about 81.67 % of the total number of individuals due to the high flourishing of Rhizosolenia alata variety gracillima, Thalassionema nitzschioides, Skeletonema costatum, Thalassiothrix frauenfeldii, and Chaetoceros lorenzianus. AbuRommanh was the most productive area in the phytoplankton counts, whereas the area of Shandoura was the lowest productive one, coincided principally with the types and amounts of pollutants as well as the highest human and fishing activities at this area of the Bitter Lakes.

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“…Among the Dinoflagellata, Halim (1963), Kimor (1972), and Dowidar (1973) report Ceratium furca, Ceratium aegyptiacum and Ceratium eupulchellum. There are two tintinnids, Tzntinnopsis beroidea and T.radix (Kimor, 1972).…”

Section: Species Diversity In the Suez Canalmentioning

confidence: 99%

Lessepsian Migration

Por

1978

Ecological Studies

139

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Distribution and Ecology of Ceratium egyptiacum Halim and its Validity as Indicator of the Current Regime in the Suez Canal

Cited by 14 publications

References 5 publications

Phytoplankton biodiversity and NW Mediterranean Sea warming: changes in the dinoflagellate genus Ceratium in the 20th century

Phytoplankton biodiversity and NW Mediterranean Sea warming: changes in the dinoflagellate genus Ceratium in the 20th century

Effects of some environmental factors on the population density and species diversity of phytoplankton in Bitter Lakes, Egypt

Lessepsian Migration

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