The effects of Phaeocystis globosa bloom on the dynamics of the mineralization processes in intertidal permeable sediment in the Eastern English Channel (Wimereux, France)

2008 ◽  
Vol 56 (7) ◽  
pp. 1284-1293 ◽  
Author(s):  
Mathieu Rauch ◽  
Lionel Denis ◽  
Jean-Claude Dauvin
Keyword(s):  
English Channel ◽  
Phaeocystis Globosa ◽  
Permeable Sediment ◽  
Mineralization Processes

Coastal bacterial viability and production in the eastern English Channel: A case study during a Phaeocystis globosa bloom

2006 ◽  
Vol 56 (3) ◽  
pp. 227-238 ◽  
Author(s):  
D. Lamy ◽  
L.F. Artigas ◽  
C. Jauzein ◽  
F. Lizon ◽  
V. Cornille
Keyword(s):  
English Channel ◽  
Phaeocystis Globosa ◽  
Bacterial Viability

Phylogenetic analysis of PgV-102P, a new virus from the English Channel that infects Phaeocystis globosa

2006 ◽  
Vol 86 (3) ◽  
pp. 485-490 ◽  
Author(s):  
William H. Wilson ◽  
Declan C. Schroeder ◽  
Jenna Ho ◽  
Martin Canty
Keyword(s):  
Phylogenetic Analysis ◽  
Dna Polymerase ◽  
Harmful Algal Bloom ◽  
English Channel ◽  
Polymerase Gene ◽  
Phaeocystis Globosa ◽  
Dna Viruses ◽  
Algal Virus ◽  
Double Stranded Dna ◽  
Dna Polymerase Gene

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.

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

2009 ◽  
Vol 58 (1) ◽  
pp. 55-63 ◽  
Author(s):  
Nicolas Spilmont ◽  
Lionel Denis ◽  
Luis Felipe Artigas ◽  
Frédéric Caloin ◽  
Lucie Courcot ◽  
...  
Keyword(s):  
Spring Bloom ◽  
English Channel ◽  
Phaeocystis Globosa

scholarly journals Trajectories of Changes in Phytoplankton Biomass, Phaeocystis globosa and Diatom (incl. Pseudo-nitzschia sp.) Abundances Related to Nutrient Pressures in the Eastern English Channel, Southern North Sea

2020 ◽  
Vol 8 (6) ◽  
pp. 401 ◽  
Author(s):  
Alain Lefebvre ◽  
Camille Dezécache
Keyword(s):  
North Sea ◽  
Inorganic Nitrogen ◽  
Ecological Status ◽  
Initial Pressure ◽  
Numerical Approach ◽  
Significant Shift ◽  
English Channel ◽  
Nutrient Inputs ◽  
Phaeocystis Globosa ◽  
Southern North Sea

The phytoplankton compartment is particularly reactive to changes in nutrient concentration and is used as a quality indicator. Using a simple numerical approach, the response of emblematic harmful taxa from the eastern English Channel and southern North Sea to changes in nutrient inputs was studied. The method is based on a diachronic approach using averaged maxima over sliding periods of six years (1994–2018). This gave a final dataset containing pairs of points (number of years) for explained and explanatory variables. The temporal trajectory of the relationship between each pair of variables was then highlighted. Changes were represented as long-term trajectories that allowed a comparison to a reference/average situation. In addition, the relevance of the use of Phaeocystis globosa and the Pseudo-nitzchia complex as eutrophication species indicators was tested. Results showed a significant shift in the 2000s and different trajectories between diatoms and P. globosa abundances in response to changes in Dissolved Inorganic Nitrogen (DIN). The contrasting ecosystems under study reacted differently depending on the initial pressure. While a return to good ecological status does not seem feasible in the short term, it seems that these ecosystems were in an unstable intermediate state requiring continued efforts to reduce nutrient inputs.

Studi Awal Geologi di Daerah Beruang Kanan Kabupaten Gunung Mas Propinsi Kalimantan Tengah

PROMINE ◽  
2018 ◽  
Vol 6 (1) ◽  
pp. 1-11
Author(s):  
Retno Anjarwati ◽  
Arifudin Idrus ◽  
Lucas Donny Setijadji
Keyword(s):  
Gold Mineralization ◽  
Volcanic Rocks ◽  
Gold Deposits ◽  
Central Kalimantan ◽  
Magmatic Arc ◽  
Tertiary Sediment ◽  
Copper Gold ◽  
Regional Tectonic ◽  
Mineralization Processes ◽  
High Yields

The regional tectonic conditions of the KSK Contract of Work are located in the mid-Tertiary magmatic arc (Carlile and Mitchell, 1994) which host a number of epithermal gold deposits (eg, Kelian, Indon, Muro) and significant prospects such as Muyup, Masupa Ria, Gunung Mas and Mirah. Copper-gold mineralization in the KSK Contract of Work is associated with a number of intrusions that have occupied the shallow-scale crust at the Mesozoic metamorphic intercellular junction to the south and continuously into the Lower Tertiary sediment toward the water. This intrusion is interpreted to be part of the Oligocene arc of Central Kalimantan (in Carlile and Mitchell 1994) Volcanic rocks and associated volcanoes are older than intrusions, possibly aged Cretaceous and exposed together with all three contacts (Carlile and Mitchell, 1994) some researchers contribute details about the geological and mineralogical background, and some papers for that are published for the Beruang Kanan region and beyond but no one can confirm the genesis type of the Beruang Kanan region The mineralization of the Beruang Kanan area is generally composed by high yields of epithermal sulphide mineralization. with Cu-Au mineralization This high epithermal sulphide deposition coats the upper part of the Cu-Au porphyry precipitate associated with mineralization processes that are generally controlled by the structure

Sign in / Sign up

Export Citation Format

Share Document