Matches in SemOpenAlex for { <https://semopenalex.org/work/W2003013908> ?p ?o ?g. }
- W2003013908 endingPage "62" @default.
- W2003013908 startingPage "45" @default.
- W2003013908 abstract "Benthic metabolism and the effects of bioturbation were investigated during the dry season from December to March in a tilapia (Oreochromis niloticus) dominated polyculture fish pond in northeast Thailand. Benthic metabolic fluxes were measured by incubating intact sediment cores sampled in the pond. Oxygen uptake showed significant temporal variations from 15.4 to 52.3 mmol O2 m−2 day−1, averaging 31.9 ± 15.0 mmol O2 m−2 day−1. Total carbon dioxide release showed similar temporal variations from 43.0 to 127.8 mmol CO2 m−2 day−1, averaging 68.6 ± 36.9 mmol CO2 m−2 day−1 (n = 6). The community respiratory quotient (RQ = CO2O2; range 1.1–3.5, average 2.3 ± 0.9, n = 6) indicated significant anaerobic mineralisation. Oxygen uptake by the sediment corresponded to 8% of the oxygen respired by the planktonic community. Ammonia release averaged 13.2 ± 4.8 mmol NH+4 m−2 day−1 (n = 4). A new method using the stable 15N isotope technique for measuring denitrification was introduced. Rates of denitrification averaged 4.1 ± 0.85 mmol N m−2 day−1 (n = 3). Denitrification was insignificant in the mineralisation of organic matter, but caused atmospheric loss of nitrogen, averaging 16% of the loading by commercial fertiliser and manure. The net sedimentation of particulate organic matter in the pond was 5 cm year−1. The burial of particulate organic carbon (POC) and particulate organic nitrogen (PON) averaged 25% and 60% of the gross input, respectively. The effects of fish and benthic fauna on the benthic metabolism were studied by excluding the fish from 0.5 m2 of the pond bottom for 6 weeks. The sediment was dominated by small oligochaetes less than 10 mm long and the exclusion experiment indicated a high predation on the benthic fauna. Oligochaete numbers and biomass as well as benthic metabolic rates were significantly higher when fish were excluded from the sediment. Inside the exclosure, the RQ was approximately the double that outside, indicating that the exclusion of fish from the sediment increased the sediment flux of metabolites and the anaerobic respiration, including the denitrification process. The presence of benthivorous fish reduced the atmospheric nitrogen loss caused by denitrification by 50%." @default.
- W2003013908 created "2016-06-24" @default.
- W2003013908 creator A5018434980 @default.
- W2003013908 creator A5033346554 @default.
- W2003013908 date "1997-04-01" @default.
- W2003013908 modified "2023-09-26" @default.
- W2003013908 title "Benthic metabolism and the effects of bioturbation in a fertilised polyculture fish pond in northeast Thailand" @default.
- W2003013908 cites W1544386505 @default.
- W2003013908 cites W1576460556 @default.
- W2003013908 cites W1671899670 @default.
- W2003013908 cites W1985290698 @default.
- W2003013908 cites W1994925927 @default.
- W2003013908 cites W2001633796 @default.
- W2003013908 cites W2008867129 @default.
- W2003013908 cites W2034152066 @default.
- W2003013908 cites W2034160165 @default.
- W2003013908 cites W2045936395 @default.
- W2003013908 cites W2052641003 @default.
- W2003013908 cites W2055957490 @default.
- W2003013908 cites W2056654834 @default.
- W2003013908 cites W2063687154 @default.
- W2003013908 cites W2063730432 @default.
- W2003013908 cites W2071096668 @default.
- W2003013908 cites W2087165097 @default.
- W2003013908 cites W2092411426 @default.
- W2003013908 cites W2102942560 @default.
- W2003013908 cites W2105961523 @default.
- W2003013908 cites W2132435333 @default.
- W2003013908 cites W2294177855 @default.
- W2003013908 cites W4231703012 @default.
- W2003013908 cites W4238820525 @default.
- W2003013908 cites W4240335892 @default.
- W2003013908 cites W4254900311 @default.
- W2003013908 doi "https://doi.org/10.1016/s0044-8486(96)01466-4" @default.
- W2003013908 hasPublicationYear "1997" @default.
- W2003013908 type Work @default.
- W2003013908 sameAs 2003013908 @default.
- W2003013908 citedByCount "35" @default.
- W2003013908 countsByYear W20030139082012 @default.
- W2003013908 countsByYear W20030139082013 @default.
- W2003013908 countsByYear W20030139082014 @default.
- W2003013908 countsByYear W20030139082015 @default.
- W2003013908 countsByYear W20030139082022 @default.
- W2003013908 countsByYear W20030139082023 @default.
- W2003013908 crossrefType "journal-article" @default.
- W2003013908 hasAuthorship W2003013908A5018434980 @default.
- W2003013908 hasAuthorship W2003013908A5033346554 @default.
- W2003013908 hasConcept C107872376 @default.
- W2003013908 hasConcept C140793950 @default.
- W2003013908 hasConcept C151730666 @default.
- W2003013908 hasConcept C153018869 @default.
- W2003013908 hasConcept C158787203 @default.
- W2003013908 hasConcept C178790620 @default.
- W2003013908 hasConcept C185592680 @default.
- W2003013908 hasConcept C18903297 @default.
- W2003013908 hasConcept C2816523 @default.
- W2003013908 hasConcept C2909208804 @default.
- W2003013908 hasConcept C48743137 @default.
- W2003013908 hasConcept C505870484 @default.
- W2003013908 hasConcept C537208039 @default.
- W2003013908 hasConcept C68701300 @default.
- W2003013908 hasConcept C73593433 @default.
- W2003013908 hasConcept C83042747 @default.
- W2003013908 hasConcept C86803240 @default.
- W2003013908 hasConcept C86909935 @default.
- W2003013908 hasConceptScore W2003013908C107872376 @default.
- W2003013908 hasConceptScore W2003013908C140793950 @default.
- W2003013908 hasConceptScore W2003013908C151730666 @default.
- W2003013908 hasConceptScore W2003013908C153018869 @default.
- W2003013908 hasConceptScore W2003013908C158787203 @default.
- W2003013908 hasConceptScore W2003013908C178790620 @default.
- W2003013908 hasConceptScore W2003013908C185592680 @default.
- W2003013908 hasConceptScore W2003013908C18903297 @default.
- W2003013908 hasConceptScore W2003013908C2816523 @default.
- W2003013908 hasConceptScore W2003013908C2909208804 @default.
- W2003013908 hasConceptScore W2003013908C48743137 @default.
- W2003013908 hasConceptScore W2003013908C505870484 @default.
- W2003013908 hasConceptScore W2003013908C537208039 @default.
- W2003013908 hasConceptScore W2003013908C68701300 @default.
- W2003013908 hasConceptScore W2003013908C73593433 @default.
- W2003013908 hasConceptScore W2003013908C83042747 @default.
- W2003013908 hasConceptScore W2003013908C86803240 @default.
- W2003013908 hasConceptScore W2003013908C86909935 @default.
- W2003013908 hasIssue "1-2" @default.
- W2003013908 hasLocation W20030139081 @default.
- W2003013908 hasOpenAccess W2003013908 @default.
- W2003013908 hasPrimaryLocation W20030139081 @default.
- W2003013908 hasRelatedWork W1990637930 @default.
- W2003013908 hasRelatedWork W201352748 @default.
- W2003013908 hasRelatedWork W2024646008 @default.
- W2003013908 hasRelatedWork W2042491294 @default.
- W2003013908 hasRelatedWork W2062541677 @default.
- W2003013908 hasRelatedWork W2063218798 @default.
- W2003013908 hasRelatedWork W2078546575 @default.
- W2003013908 hasRelatedWork W2749541073 @default.
- W2003013908 hasRelatedWork W2912262402 @default.
- W2003013908 hasRelatedWork W3097026268 @default.
- W2003013908 hasVolume "150" @default.