Impact of the Phaeocystis globosa spring bloom on the intertidal benthic compartment in the eastern English Channel: A synthesis

A new virus that infects the harmful algal bloom-forming microalga Phaeocystis globosa was isolated from surface water in the English Channel off the coast of Plymouth, UK, in May 2001. Phylogenetic analysis of the DNA polymerase gene revealed the virus isolate, designated PgV-102P, belongs to the family Phycodnaviridae, a group of large double-stranded DNA viruses known to infect algae. Basic characterization of PgV-102P revealed it was a lytic virus with a relatively slow culture lysis period of 10-days. The genome size (176 kbp) and capsid diameter (98 nm) of PgV-102P fall at the bottom end of the range expected for phycodnaviruses. Interestingly, PgV-102P did not cluster with other P. globosa viruses; instead, it was more closely related to other prymnesioviruses that infect the marine prymnesiophyte Chrysochromulina brevifilum. We discuss the effectiveness of DNA polymerase as a diagnostic marker. Although it is ideal for determining what family or even genus an algal virus belongs to, it is clear that the DNA polymerase gene does not have sufficient resolution when looking for relationships within algal virus genera.

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Temporal changes of major bacterial groups and bacterial heterotrophic activity during a Phaeocystis globosa bloom in the eastern English Channel

Aquatic Microbial Ecology ◽

10.3354/ame01359 ◽

2009 ◽

Vol 58 ◽

pp. 95-107 ◽

Cited By ~ 34

Author(s):

D Lamy ◽

I Obernosterer ◽

M Laghdass ◽

F Artigas ◽

E Breton ◽

...

Keyword(s):

Temporal Changes ◽

English Channel ◽

Phaeocystis Globosa ◽

Heterotrophic Activity ◽

Bacterial Groups

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Mesoscale and microscale spatial variability of bacteria and viruses during a Phaeocystis globosa bloom in the Eastern English Channel

Estuarine Coastal and Shelf Science ◽

10.1016/j.ecss.2008.09.011 ◽

2008 ◽

Vol 80 (4) ◽

pp. 589-597 ◽

Cited By ~ 11

Author(s):

J.R. Seymour ◽

L. Seuront ◽

M.J. Doubell ◽

J.G. Mitchell

Keyword(s):

Spatial Variability ◽

English Channel ◽

Phaeocystis Globosa

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Increased seawater viscosity, Phaeocystis globosa spring bloom and Temora longicornis feeding and swimming behaviours

Marine Ecology Progress Series ◽

10.3354/meps07373 ◽

2008 ◽

Vol 363 ◽

pp. 131-145 ◽

Cited By ~ 27

Author(s):

L Seuront ◽

D Vincent

Keyword(s):

Spring Bloom ◽

Phaeocystis Globosa ◽

Temora Longicornis

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The seasonal abundance of the copepodite stages of Calanus helgolandicus and Pseudocalanus elongatus off Plymouth

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315400032677 ◽

1993 ◽

Vol 73 (1) ◽

pp. 109-122 ◽

Cited By ~ 19

Author(s):

E. P. Green ◽

R. P. Harris ◽

A. Duncan

Keyword(s):

Seasonal Variation ◽

Relative Abundance ◽

Spring Bloom ◽

Food Limitation ◽

The Body ◽

Seasonal Abundance ◽

English Channel ◽

Major Period ◽

Naupliar Development ◽

Calanus Helgolandicus

The relative abundance of the six copepodite stages (CI-CVI) of Calanus helgolandicus Claus (Copepoda: Calanoida) and Pseudocalanus elongatus Boeck (Copepoda: Calanoida) was recorded at a station in the English Channel throughout 1989. There was a pronounced seasonal variation in the abundance of the early stages. Increased recruitment from the nauplii corresponded in both species to rising primary production early in the year, producing small CI abundance peaks in March. The major period of naupliar development occurred after the April/May spring bloom. During seasonal peaks the CI and CII stages typically formed 40% of the copepodites of these species but were scarce at other times. The body carbon weight of Calanus and Pseudocalanus CIs decreased by 38% and 21% respectively from May to August, indicating an increase in food limitation for the nauplii. Summer was passed predominantly in the CIV and CV stage at low abundances.

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