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Naslov:The depleted carbon isotopic signature of nematodes and harpacticoids and their place in carbon processing in fish farm sediments
Avtorji:ID Grego, Mateja (Avtor)
ID Malej, Alenka (Avtor)
ID De Troch, Marleen (Avtor)
Datoteke:URL URL - Izvorni URL, za dostop obiščite https://www.frontiersin.org/articles/10.3389/fmars.2020.00572/full
 
.pdf PDF - Predstavitvena datoteka, prenos (12,60 MB)
MD5: EB4131F51C3C4D98E4EAD30A63218DF4
 
Jezik:Angleški jezik
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:Logo NIB - Nacionalni inštitut za biologijo
Povzetek:Fish farm-originating organic matter can modify the ecological processes in a benthic ecosystem. This was investigated in the sediments of the northern Adriatic Sea by measuring δ13C signature of nematodes, harpacticoids, and sedimentary organic matter, and by assessing pore water nutrients and bacterial composition. In a mesocosm experiment, 13C-labeled diatoms were added on top of sediment cores and 13C enrichment was measured as a proxy of diatom uptake by meiofauna. The δ13C signatures were depleted under fish farming cages compared to the reference site, as observed for sedimentary organic matter (−24.4‰ vs. −21.8‰), for nematodes (−22.5‰ vs. −17.7‰), and for harpacticoids (−25.3‰ vs. −20.8‰). The direct consumption of fish feed (−22.2‰) was not traced in meiofauna taxa. Nematodes from the farm site likely reflect a diet comprising sedimentary organic matter, as they were enriched by 2‰ relative to the sedimentary organic matter. The nematodes from the reference site were enriched by 4.2‰ relative to the sedimentary organic matter, which implies that they rely on more enriched food sources, like diatoms, which was confirmed by their uptake of 13C-labeled diatoms. The nematode assemblage incorporated more diatom 13C than harpacticoids, making them more important players in the carbon flux from diatoms to higher trophic levels at the reference site. Harpacticoids from the reference site were enriched by 1.1‰ compared to sedimentary organic matter, implying that this was their primary food source. Harpacticoids from the farm site were depleted by 0.9‰ relative to the sedimentary organic matter, indicating they were influenced by a very depleted food source like bacteria. Harpacticoids from both the cage and reference sites consumed 13C-labeled diatoms, which implies their diet might span a broad δ13C range, from bacteria to diatoms. Pore water nutrients with high dissolved inorganic carbon, phosphate, and ammonium concentration indicated an elevated microbial degradation of organic compounds under the fish farm. The denaturing gradient gel electrophoresis analysis showed a 70% similarity between sediment bacteria communities from the fish farm and reference site. The study demonstrated that fish farm-originating organic matter enters the meiofauna food chain, and that nematodes and harpacticoids use different food sources under the fish farm and at the reference site.
Status publikacije:Objavljeno
Verzija publikacije:Objavljena publikacija
Datum objave:28.07.2020
Leto izida:2020
Št. strani:str. 1-15
Številčenje:Vol. 7, article 572
PID:20.500.12556/DiRROS-19521 Novo okno
UDK:574.6
ISSN pri članku:2296-7745
DOI:10.3389/fmars.2020.00572 Novo okno
COBISS.SI-ID:24147971 Novo okno
Opomba:Nasl. z nasl. zaslona; Opis vira z dne 31. 7. 2020;
Datum objave v DiRROS:22.07.2024
Število ogledov:426
Število prenosov:266
Metapodatki:XML DC-XML DC-RDF
:
GREGO, Mateja, MALEJ, Alenka in DE TROCH, Marleen, 2020, The depleted carbon isotopic signature of nematodes and harpacticoids and their place in carbon processing in fish farm sediments. Frontiers in marine science [na spletu]. 2020. Vol. 7, no. 572, p. 1–15. [Dostopano 9 april 2025]. DOI 10.3389/fmars.2020.00572. Pridobljeno s: https://dirros.openscience.si/IzpisGradiva.php?lang=slv&id=19521
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Gradivo je del revije

Naslov:Frontiers in marine science
Skrajšan naslov:Front. mar. sci.
Založnik:Frontiers Media S.A.
ISSN:2296-7745
COBISS.SI-ID:523094809 Novo okno

Gradivo je financirano iz projekta

Financer:ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
Številka projekta:P1-0237-2020
Naslov:Raziskave obalnega morja
Financer:EC - European Commission
Program financ.:European 6th Framework Programme
Številka projekta:006540
Naslov:Ecosystem Approach for Sustainable Aquaculture
Akronim:ECASA

Licence

Licenca:CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:hidrobiologija, ribogojnice, usedline, ogljik


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