scholarly journals Distribution of the prokaryotic biomass and community respiration in the main water masses of the Southern Tyrrhenian Sea (June and December 2005)

2010 ◽  
Vol 1 (2) ◽  
pp. 235 ◽  
Author(s):  
Rosabruna La Ferla ◽  
Maurizio Azzaro ◽  
Giorgio Budillon ◽  
Carmela Caroppo ◽  
Franco Decembrini ◽  
...  
Keyword(s):  
Microbial Community ◽  
Water Masses ◽  
Community Respiration ◽  
Tyrrhenian Sea ◽  
Ets Activity ◽  
C Cell ◽  
Prokaryotic Abundance ◽  
Volume Measurements ◽  
Southern Tyrrhenian Sea ◽  
Bottom Depth

The distribution of the prokaryotic biomass (from both abundance and cell volume measurements) and microbial community respiration (by ETS activity) in the main water masses of the Southern Tyrrhenian Sea were studied. The data were collected from surface to the bottom depth (max 3600 m) in July and December 2005. Prokaryotic abundance and microbial respiration were higher in summer than late-autumn and decreased with depth in accordance with the water masses. The opposite was found for the prokaryotic cell volumes that increased with depth and were higher in December. The cell carbon content varied within the water masses and study periods (range 9–34 fg C cell−1) and overestimations and underestimations of biomass there would have been by using the routinely adopted conversion factor (20 fg C cell−1). The depth-integrated respiratory rates resulted comparable in the photic and aphotic layers. In July, 210 and 225 mg C m−2 day−1 in the euphotic and aphotic zones, respectively, were remineralized while in December, 112 and 134 mg C m−2 day−1, respectively, were. Speculations to quantify the carbon flow mediated by microbial community suggested the occurrence of different microbial behavior within the different water masses.

Distribution of the prokaryotic biomass and community respiration in the main water masses of the Southern Tyrrhenian Sea (June and December 2005)

2010 ◽  
Vol 1 (2) ◽  
pp. 235-257 ◽  
Author(s):  
Rosabruna La Ferla ◽  
Maurizio Azzaro ◽  
Giorgio Budillon ◽  
Carmela Caroppo ◽  
Franco Decembrini ◽  
...  
Keyword(s):  
Water Masses ◽  
Community Respiration ◽  
Tyrrhenian Sea ◽  
Southern Tyrrhenian Sea

scholarly journals Ocean Acidification Induces Changes in Virus–Host Relationships in Mediterranean Benthic Ecosystems

2021 ◽  
Vol 9 (4) ◽  
pp. 769
Author(s):  
Michael Tangherlini ◽  
Cinzia Corinaldesi ◽  
Francesca Ape ◽  
Silvestro Greco ◽  
Teresa Romeo ◽  
...  
Keyword(s):  
Organic Matter ◽  
Ocean Acidification ◽  
Tyrrhenian Sea ◽  
Benthic Assemblages ◽  
Prokaryotic Abundance ◽  
Microbial Response ◽  
Southern Tyrrhenian Sea ◽  
Host Relationships ◽  
Benthic Ecosystems ◽  
Mixed Gases

Acidified marine systems represent “natural laboratories”, which provide opportunities to investigate the impacts of ocean acidification on different living components, including microbes. Here, we compared the benthic microbial response in four naturally acidified sites within the Southern Tyrrhenian Sea characterized by different acidification sources (i.e., CO2 emissions at Ischia, mixed gases at Panarea and Basiluzzo and acidified freshwater from karst rocks at Presidiana) and pH values. We investigated prokaryotic abundance, activity and biodiversity, viral abundance and prokaryotic infections, along with the biochemical composition of the sediment organic matter. We found that, despite differences in local environmental dynamics, viral life strategies change in acidified conditions from mainly lytic to temperate lifestyles (e.g., chronic infection), also resulting in a lowered impact on prokaryotic communities, which shift towards (chemo)autotrophic assemblages, with lower organic matter consumption. Taken together, these results suggest that ocean acidification exerts a deep control on microbial benthic assemblages, with important feedbacks on ecosystem functioning.

Distribution patterns and population structure of Illex coindetii (Cephalopoda: Ommastrephidae) in the Southern Tyrrhenian Sea: Historical series of 14 years trawl survey

2011 ◽  
Vol 109 (2-3) ◽  
pp. 342-350 ◽  
Author(s):  
Anna Perdichizzi ◽  
Laura Pirrera ◽  
Daniela Giordano ◽  
Francesco Perdichizzi ◽  
Barbara Busalacchi ◽  
...  
Keyword(s):  
Population Structure ◽  
Distribution Patterns ◽  
Trawl Survey ◽  
Tyrrhenian Sea ◽  
Historical Series ◽  
Southern Tyrrhenian Sea

Crustal magnetism of the Southern Tyrrhenian Sea from aeromagnetic surveys

2006 ◽  
Vol 262 (1) ◽  
pp. 337-348
Author(s):  
G. L. Piangiamore ◽  
O. Faggioni ◽  
M. S. Barbano
Keyword(s):  
Tyrrhenian Sea ◽  
Southern Tyrrhenian Sea

scholarly journals A Histological Study of Ovarian Development in the Giant Red ShrimpAristaeomorpha foliacea(Crustacea: Decapoda: Aristeidae) from the Southern Tyrrhenian Sea (Western Mediterranean)

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Anna Perdichizzi ◽  
Laura Pirrera ◽  
Valeria Micale ◽  
Ugo Muglia ◽  
Paola Rinelli
Keyword(s):  
Ovarian Development ◽  
Developmental Stages ◽  
Histological Study ◽  
Western Mediterranean ◽  
Ovary Development ◽  
Tyrrhenian Sea ◽  
Length Frequency ◽  
Southern Tyrrhenian Sea ◽  
Aristaeomorpha Foliacea ◽  
Trawl Surveys

The reproductive features of the giant red shrimp,Aristaeomorpha foliacea, were investigated in the southern Tyrrhenian sea by experimental trawl sampling. The annual length-frequency distribution showed a multimodal trend in females, ranging between 16 and 67 mm carapace length (CL), and a unimodal trend in males (18–45 mm CL). Mature males occurred in different proportions all year round, while females displayed seasonal maturity (June—September), with a peak in July. Six oocyte developmental stages were identified, the most advanced of which (Pv, postvitellogenic) had never been described before in this species. Ovary development followed a group-synchronous pattern, with the yolked oocyte stock clearly separated from the reservoir of unyolked oocytes, suggesting thatA. foliaceais a total spawner, with determinate fecundity. Based upon histological findings, a revision of macroscopic maturity staging employed in Mediterranean bottom trawl surveys (MEDITS) is proposed.

scholarly journals Abundance and Microbial Diversity from Surface to Deep Water Layers Over the Rio Grande Rise, South Atlantic

2021 ◽  
Author(s):  
Juliana Correa Neiva Ferreira ◽  
Natascha M. Bergo ◽  
Pedro M. Tura ◽  
Mateus Gustavo Chuqui ◽  
Frederico P. Brandini ◽  
...  
Keyword(s):  
Microbial Community ◽  
Microbial Diversity ◽  
Rio Grande ◽  
South Atlantic ◽  
Water Masses ◽  
16S Rrna Genes ◽  
Rrna Genes ◽  
List Type ◽  
Tropical Water ◽  
Southwestern Atlantic Ocean

AbstractMarine microbes control the flux of matter and energy essential for life in the oceans. Until now, the distribution and diversity of planktonic microorganisms above Fe-Mn crusts has received relatively little attention. Future mining\dredging of these minerals is predicted to affect microbial diversity and functioning in the deep sea. Here, we studied the ecology of planktonic microbes among pelagic environments of an Fe-Mn deposit region, at Rio Grande Rise, Southwestern Atlantic Ocean. We investigated microbial community composition using high-throughput sequencing of 16S rRNA genes and their abundance estimated by flow cytometry. Our results showed that the majority of picoplanktonic was found in epi- and mesopelagic waters, corresponding to the Tropical Water and South Atlantic Central Water. Bacterial and archaeal groups related to phototrophy, heterotrophy and chemosynthesis, such as Synechococcales, Sar11 (Proteobacteria) and Nitrosopumilales (Thaumarchaeota) were the main representatives of the pelagic microbial community. Additionally, we detected abundant assemblages involved in biodegradation of marine organic matter and iron oxidation at deep waters, i.e., Pseudoalteromonas and Alteromonas. No differences were observed in microbial community alpha diversity. However, we detected differences in community structure between water masses, suggesting that changes in an environmental setting (i.e. nutrient availability or circulation) play a significant role in structuring the pelagic zones, also affecting the meso- and bathypelagic microbiome.HighlightsRio Grande Rise pelagic microbiomePicoplankton carbon biomass partitioning through pelagic zonesUnique SAR11 Clade I oligotype in the shallowest Tropical WaterHigher number of shared oligotypes between deepest water massesNitrogen, carbon and sulfur may be important contributors for the pelagic microbiome

scholarly journals New Volcanic Complex Found Below the Southern Tyrrhenian Sea

Eos ◽  
2019 ◽  
Vol 100 ◽  
Author(s):  
Terri Cook
Keyword(s):  
Volcanic Complex ◽  
Tyrrhenian Sea ◽  
Intrusive Complex ◽  
Mantle Material ◽  
Northern Edge ◽  
Southern Tyrrhenian Sea

Researchers have identified a previously unknown volcanic-intrusive complex that originated through the melting of mantle material at the northern edge of the Ionian slab.

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