Sökning: id:"swepub:oai:DiVA.org:su-184554" >
Meiofauna improve o...
Meiofauna improve oxygenation and accelerate sulfide removal in the seasonally hypoxic seabed
-
- Bonaglia, Stefano (författare)
- Stockholms universitet,Institutionen för ekologi, miljö och botanik,University of Southern Denmark, Denmark
-
- Hedberg, Johanna (författare)
- Stockholms universitet,Institutionen för ekologi, miljö och botanik
-
Marzocchi, Ugo (författare)
-
visa fler...
-
- Iburg, Sven (författare)
- Stockholms universitet,Institutionen för ekologi, miljö och botanik
-
Glud, Ronnie N. (författare)
-
- Nascimento, Francisco J. A. (författare)
- Stockholms universitet,Institutionen för ekologi, miljö och botanik
-
visa färre...
-
(creator_code:org_t)
- Elsevier BV, 2020
- 2020
- Engelska.
-
Ingår i: Marine Environmental Research. - : Elsevier BV. - 0141-1136 .- 1879-0291. ; 159
- Relaterad länk:
-
https://doi.org/10.1...
-
visa fler...
-
https://doi.org/10.1...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- Oxygen depleted areas are widespread in the marine realm. Unlike macrofauna, meiofauna are abundant in hypoxic sediments. We studied to what extent meiofauna affect oxygen availability, sulfide removal and microbial communities. Meiofauna were extracted alive and added to intact sediments simulating abundance gradients previously reported in the area. A total of 324 porewater microprofiles were recorded over a 3-week incubation period and microbial community structure and cable bacteria densities were determined at the end of the experiment. At high abundances meiofauna activity deepened oxygen penetration by 85%, 59%, and 62% after 5, 14, and 22 days, respectively, compared to control sediment with scarce meiofauna. After 6 days, meiofauna increased the volume of oxidized, sulfide-free sediment by 68% and reduced sulfide fluxes from 8.8 to 0.4 mmol m(-2) d(-1). After 15 days, the difference with the control attenuated due to the presence of a cable bacteria population, which facilitated sulfides oxidation in all treatments. 16S rRNA gene analysis revealed that meiofauna affected microbial community structure (beta diversity). Thus, meiofauna bioturbation plays an important role in deepening oxygen penetration, counteracting euxinia and in structuring microbial diversity of hypoxic sediments. Co-existence with cable bacteria demonstrates neutralism interaction between these two ecosystem engineers.
Ämnesord
- NATURVETENSKAP -- Biologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences (hsv//eng)
Nyckelord
- Hypoxia
- Sediment
- Meiofauna
- Sulfide oxidation
- Oxygen penetration
- Nematode
- Cable bacteria
- 16S rRNA sequencing
- Microbial communities
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas