Extrapolations of Standing-Stocks of Big Bacteria in Humboldt Eastern Boundary Current Ecosystem (HEBCE)

Gallardo, Víctor A.; Fonseca, Alexis; Musleh, Selim; Espinoza, Claudia

doi:10.4172/2332-2632.1000110

Cited by 4 publications

(3 citation statements)

References 37 publications

(49 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, since sulfur-driven microbial metabolisms have been shown to be as old ca. 3.5 Ga and appropriate environmental conditions up to this day (Gallardo et al 2013b), the species-rich and high information diversity bacterial community living in the HS today could be considered related to the primordial bacterial communities. Consistent morphological similarities between Archean fossils and the extant filamentous multicellular macro-and megabacteria of the HS attest to this proposition.…”

Section: Discussionmentioning

confidence: 99%

“…Consistent morphological similarities between Archean fossils and the extant filamentous multicellular macro-and megabacteria of the HS attest to this proposition. A list of filamentous fossil records of bacteria from the early Archaean has been extracted from the micropaleontological literature (Schopf 2006) by Gallardo et al (2013b), suggesting that at least some of the older filamentous fossil records could have been members of ancient sulfuretum communities. In other words, in this type of stable-environment-over-time community complexity has been maximized.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Bacteria of the Humboldt sulfuretum comply with unifying macroecological principles

et al. 2015

View full text Add to dashboard Cite

The Humboldt Sulfuretum (HS), in the productive Humboldt Eastern Boundary Current Upwelling Ecosystem, extends under the hypoxic waters of the Peru-Chile Undercurrent (ca. 6˚S and ca. 36˚S). Studies show that primeval sulfuretums held diverse prokaryotic life, and, while rare today, still sustain species-rich giant sulfur-oxidizing bacterial communities. We here present the genomic features of a new bacteria of the HS, "Candidatus Venteria ishoeyi" ("Ca. V. ishoeyi") in the family Thiotrichaceae.Three identical filaments were micro-manipulated from reduced sediments collected off central Chile; their DNA was extracted, amplified, and sequenced by a Roche 454 GS FLX platform. Using three sequenced libraries and through de novo genome assembly, a draft genome of 5.7 Mbp, 495 scaffolds, and a N50 of 70 kbp, was obtained. The 16S rRNA gene phylogenetic analysis showed that "Ca. V. ishoeyi" is related to non-vacuolate forms presently known as Beggiatoa or Beggiatoa-like forms. The complete set of genes involved in respiratory nitrate-reduction to dinitrogen was identified in "Ca. V. ishoeyi"; including genes likely leading to ammonification. As expected, the sulfur-oxidation pathway reported for other sulfur-oxidizing bacteria were deduced and also, key inorganic and organic carbon acquisition related genes were identified. Unexpectedly, the genome of "Ca. V. ishoeyi" contained numerous CRISPR repeats and an IF CRISPR-Cas type system gene coding array. Findings further show that, as a member of an eons-old marine ecosystem, "Ca. V. ishoeyi" contains the needed metabolic plasticity for life in an increasingly oxygenated and variable ocean.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Bacteria of the Humboldt sulfuretum comply with unifying macroecological principles

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Taking into account the levels of photosynthetic fixed carbon C and extensive eutrophic bottoms, it is proposed that for all Chilean management areas, primary food availability should not be a limiting factor for the improvement of landings [44][45][46][47]. Thus, the surface area allotted to AR during a primary phase should not be larger than the amount considered for the development of aquaculture within the AMERBs, which corresponds to 20% of its total area [43].…”

Section: Discussionmentioning

confidence: 99%

Sustainability of the Artisanal Fishery in Northern Chile: A Case Study of Caleta Pisagua

et al. 2020

View full text Add to dashboard Cite

The Humboldt Current, one of the most productive waters in the world, flows along the Chilean coast with high primary production level. However, living marine resources in these waters are declining due to overexploitation and other anthropogenic and environmental factors. It has been reported that deploying artificial reefs in coastal waters can improve the production of benthic resources. To ensure the sustainability of coastal fisheries in northern Chile this study aims to investigate fishermen’s perceptions on deploying artificial reefs and propose future management measures using Caleta Pisagua as a case study. Interviews of artisanal fishermen regarding four aspects: fishermen profile, fishing activity, resources, and artificial reefs were conducted. Results showed that most fishermen favored the implementation of artificial reefs within the Areas of Management and Exploitation of Benthic Resources (AMERBs). In addition, deploying artificial reefs appears to be socio-economically necessary for the artisanal fishermen whose livelihood is being affected by the overexploitation of coastal fish and because hard substrates essential for benthic resources are in short supply within this administration area. It is recommended that criteria for the deployment of artificial reefs as well as specific management plans for main and secondary species should be developed.

show abstract

Microbes as marine habitat formers and ecosystem engineers

Danovaro,

Levin,

Fanelli

et al. 2024

Nat Ecol Evol

View full text Add to dashboard Cite

Extrapolations of Standing-Stocks of Big Bacteria in Humboldt Eastern Boundary Current Ecosystem (HEBCE)

Cited by 4 publications

References 37 publications

Bacteria of the Humboldt sulfuretum comply with unifying macroecological principles

Bacteria of the Humboldt sulfuretum comply with unifying macroecological principles

Sustainability of the Artisanal Fishery in Northern Chile: A Case Study of Caleta Pisagua

Microbes as marine habitat formers and ecosystem engineers

Contact Info

Product

Resources

About