Ocean acidification effects on stable isotope signatures and trophic interactions of polychaete consumers and organic matter sources at a CO2 shallow vent system

Salvatrice Vizzini, Maria-Cristina Gambi, Elena Ricevuto

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Abstract

Stable carbon and nitrogen isotope analysis (SIA)was used to examine trophic interactions in a naturally acidified shallow coastal CO2 area in the Mediterranean Sea. SIA was helpful to determine the potential effects of ocean acidification (OA) on the interactions of organic matter sources and polychaete consumers, which appear to be tolerant to high pCO2. Mesoherbivore consumers, represented by three polychaete species, Platynereis dumerilii (Audouin and Milne Edwards, 1834) (Nereididae), Polyophthalmus pictus (Dujardin, 1839) (Opheliidae) and Syllis prolifera Krohn, 1852 (Syllidae), are abundant in the low pH conditions of the CO2 vents. Samples of consumers and potential organic matter sources (macroalgae, seagrass and epiphytes)were collected in two periods (May-June and Oct-Nov 2012) in two acidified areas (Castello Aragonese CO2 vents, off Ischia, Italy) and in two control areas. Results suggest a substantial effect of high pCO2 on isotopic composition of both organic matter sources and consumers. The recurring 13C depletion observed in the acidified sites is probably due to an increase in carbon availability and to the exploitation of volcanic-derived dissolved inorganic carbon (DIC) present in the area. The nutritional quality of organic matter sourceswas higher in lowpH stations, where indeed C:N ratios decreased. Despite the occurrence of these effects, the trophic habit of high pCO2 tolerant polychaete consumers seems not to be dramatically affected. Our findings shed the light on how some benthic organisms may respond well to near-future OA conditions, exhibiting high plasticity also in their feeding habits, without being subject to dramatic ecological changes.
Original languageEnglish
Pages (from-to)105-117
Number of pages13
JournalJournal of Experimental Marine Biology and Ecology
Volume468
Publication statusPublished - 2015

Fingerprint

trophic interaction
polychaete
Polychaeta
stable isotopes
stable isotope
organic matter
carbon
Rasa Aragonesa
epiphytes
dissolved inorganic carbon
nitrogen isotope
benthic organisms
seagrass
carbon nitrogen ratio
carbon isotope
plasticity
macroalgae
isotopes
isotopic composition
nutritive value

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science

Cite this

@article{96e617151f984210bdcfce7ca9d099b2,
title = "Ocean acidification effects on stable isotope signatures and trophic interactions of polychaete consumers and organic matter sources at a CO2 shallow vent system",
abstract = "Stable carbon and nitrogen isotope analysis (SIA)was used to examine trophic interactions in a naturally acidified shallow coastal CO2 area in the Mediterranean Sea. SIA was helpful to determine the potential effects of ocean acidification (OA) on the interactions of organic matter sources and polychaete consumers, which appear to be tolerant to high pCO2. Mesoherbivore consumers, represented by three polychaete species, Platynereis dumerilii (Audouin and Milne Edwards, 1834) (Nereididae), Polyophthalmus pictus (Dujardin, 1839) (Opheliidae) and Syllis prolifera Krohn, 1852 (Syllidae), are abundant in the low pH conditions of the CO2 vents. Samples of consumers and potential organic matter sources (macroalgae, seagrass and epiphytes)were collected in two periods (May-June and Oct-Nov 2012) in two acidified areas (Castello Aragonese CO2 vents, off Ischia, Italy) and in two control areas. Results suggest a substantial effect of high pCO2 on isotopic composition of both organic matter sources and consumers. The recurring 13C depletion observed in the acidified sites is probably due to an increase in carbon availability and to the exploitation of volcanic-derived dissolved inorganic carbon (DIC) present in the area. The nutritional quality of organic matter sourceswas higher in lowpH stations, where indeed C:N ratios decreased. Despite the occurrence of these effects, the trophic habit of high pCO2 tolerant polychaete consumers seems not to be dramatically affected. Our findings shed the light on how some benthic organisms may respond well to near-future OA conditions, exhibiting high plasticity also in their feeding habits, without being subject to dramatic ecological changes.",
author = "Salvatrice Vizzini and Maria-Cristina Gambi and Elena Ricevuto",
year = "2015",
language = "English",
volume = "468",
pages = "105--117",
journal = "Journal of Experimental Marine Biology and Ecology",
issn = "0022-0981",
publisher = "Elsevier",

}

TY - JOUR

T1 - Ocean acidification effects on stable isotope signatures and trophic interactions of polychaete consumers and organic matter sources at a CO2 shallow vent system

AU - Vizzini, Salvatrice

AU - Gambi, Maria-Cristina

AU - Ricevuto, Elena

PY - 2015

Y1 - 2015

N2 - Stable carbon and nitrogen isotope analysis (SIA)was used to examine trophic interactions in a naturally acidified shallow coastal CO2 area in the Mediterranean Sea. SIA was helpful to determine the potential effects of ocean acidification (OA) on the interactions of organic matter sources and polychaete consumers, which appear to be tolerant to high pCO2. Mesoherbivore consumers, represented by three polychaete species, Platynereis dumerilii (Audouin and Milne Edwards, 1834) (Nereididae), Polyophthalmus pictus (Dujardin, 1839) (Opheliidae) and Syllis prolifera Krohn, 1852 (Syllidae), are abundant in the low pH conditions of the CO2 vents. Samples of consumers and potential organic matter sources (macroalgae, seagrass and epiphytes)were collected in two periods (May-June and Oct-Nov 2012) in two acidified areas (Castello Aragonese CO2 vents, off Ischia, Italy) and in two control areas. Results suggest a substantial effect of high pCO2 on isotopic composition of both organic matter sources and consumers. The recurring 13C depletion observed in the acidified sites is probably due to an increase in carbon availability and to the exploitation of volcanic-derived dissolved inorganic carbon (DIC) present in the area. The nutritional quality of organic matter sourceswas higher in lowpH stations, where indeed C:N ratios decreased. Despite the occurrence of these effects, the trophic habit of high pCO2 tolerant polychaete consumers seems not to be dramatically affected. Our findings shed the light on how some benthic organisms may respond well to near-future OA conditions, exhibiting high plasticity also in their feeding habits, without being subject to dramatic ecological changes.

AB - Stable carbon and nitrogen isotope analysis (SIA)was used to examine trophic interactions in a naturally acidified shallow coastal CO2 area in the Mediterranean Sea. SIA was helpful to determine the potential effects of ocean acidification (OA) on the interactions of organic matter sources and polychaete consumers, which appear to be tolerant to high pCO2. Mesoherbivore consumers, represented by three polychaete species, Platynereis dumerilii (Audouin and Milne Edwards, 1834) (Nereididae), Polyophthalmus pictus (Dujardin, 1839) (Opheliidae) and Syllis prolifera Krohn, 1852 (Syllidae), are abundant in the low pH conditions of the CO2 vents. Samples of consumers and potential organic matter sources (macroalgae, seagrass and epiphytes)were collected in two periods (May-June and Oct-Nov 2012) in two acidified areas (Castello Aragonese CO2 vents, off Ischia, Italy) and in two control areas. Results suggest a substantial effect of high pCO2 on isotopic composition of both organic matter sources and consumers. The recurring 13C depletion observed in the acidified sites is probably due to an increase in carbon availability and to the exploitation of volcanic-derived dissolved inorganic carbon (DIC) present in the area. The nutritional quality of organic matter sourceswas higher in lowpH stations, where indeed C:N ratios decreased. Despite the occurrence of these effects, the trophic habit of high pCO2 tolerant polychaete consumers seems not to be dramatically affected. Our findings shed the light on how some benthic organisms may respond well to near-future OA conditions, exhibiting high plasticity also in their feeding habits, without being subject to dramatic ecological changes.

UR - http://hdl.handle.net/10447/152523

M3 - Article

VL - 468

SP - 105

EP - 117

JO - Journal of Experimental Marine Biology and Ecology

JF - Journal of Experimental Marine Biology and Ecology

SN - 0022-0981

ER -