Assessment of CO2 and O2 spatial variability in an indigenous aquaculture system for restoration impacts
Spatial variability in carbon dioxide (CO2) and oxygen (O2) was assessed within an Indigenous Hawaiian fishpond undergoing active ecosystem restoration. The brackish, tidal fishpond is located within Kāne‘ohe Bay, Hawai‘i. Following a year of monthly discrete sampling, a significant shift in DIC and...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2022-12-01
|
| Series: | Frontiers in Marine Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fmars.2022.1049744/full |
| _version_ | 1811177981732716544 |
|---|---|
| author | Evan Lechner Yoshimi M. Rii Yoshimi M. Rii Yoshimi M. Rii Kathleen Ruttenberg Keli‘iahonui Kotubetey Christopher L. Sabine |
| author_facet | Evan Lechner Yoshimi M. Rii Yoshimi M. Rii Yoshimi M. Rii Kathleen Ruttenberg Keli‘iahonui Kotubetey Christopher L. Sabine |
| author_sort | Evan Lechner |
| collection | DOAJ |
| description | Spatial variability in carbon dioxide (CO2) and oxygen (O2) was assessed within an Indigenous Hawaiian fishpond undergoing active ecosystem restoration. The brackish, tidal fishpond is located within Kāne‘ohe Bay, Hawai‘i. Following a year of monthly discrete sampling, a significant shift in DIC and percent O2 saturation was observed along the North-South axis within the pond. The south end of the pond was higher in DIC (+35 μmol·kg⁻¹) and lower in percent O2 saturation (-19%) than the north end, which exhibited values similar to those observed in water entering the fishpond from the bay. Water quality parameters and inequal proximity to water flux sites suggested that a difference in residence time may exist along the north-south axis. In addition, ΔTA/ΔDIC relationships revealed a respiration signal in south end of the pond, which was enhanced at depth. While physical processes strongly affect CO2 and O2 across various temporal scales, spatial patterns in biological processes may also affect variability within the fishpond. These findings demonstrate that changes in water chemistry within the fishpond are the result of ecosystem restoration efforts. In turn, future management decisions at the fishpond will play an important role in preserving its viability as a healthy habitat for the intended marine species. |
| first_indexed | 2024-04-11T06:10:37Z |
| format | Article |
| id | doaj.art-34b79ac4152b41df8e55c64bea6da439 |
| institution | Directory Open Access Journal |
| issn | 2296-7745 |
| language | English |
| last_indexed | 2024-04-11T06:10:37Z |
| publishDate | 2022-12-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj.art-34b79ac4152b41df8e55c64bea6da4392022-12-22T04:41:16ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452022-12-01910.3389/fmars.2022.10497441049744Assessment of CO2 and O2 spatial variability in an indigenous aquaculture system for restoration impactsEvan Lechner0Yoshimi M. Rii1Yoshimi M. Rii2Yoshimi M. Rii3Kathleen Ruttenberg4Keli‘iahonui Kotubetey5Christopher L. Sabine6Department of Oceanography, University of Hawai‘i at Mānoa, Honolulu, HI, United StatesHawai‘i Institute of Marine Biology, Kāne‘ohe, HI, United StatesHe‘eia National Estuarine Research Reserve, Kāne‘ohe, HI, United StatesDepartment of Oceanography, University of Hawai‘i at Mānoa, Honolulu, HI, United StatesDepartment of Oceanography, University of Hawai‘i at Mānoa, Honolulu, HI, United StatesPaepae o He‘eia, Kāne‘ohe, HI, United StatesDepartment of Oceanography, University of Hawai‘i at Mānoa, Honolulu, HI, United StatesSpatial variability in carbon dioxide (CO2) and oxygen (O2) was assessed within an Indigenous Hawaiian fishpond undergoing active ecosystem restoration. The brackish, tidal fishpond is located within Kāne‘ohe Bay, Hawai‘i. Following a year of monthly discrete sampling, a significant shift in DIC and percent O2 saturation was observed along the North-South axis within the pond. The south end of the pond was higher in DIC (+35 μmol·kg⁻¹) and lower in percent O2 saturation (-19%) than the north end, which exhibited values similar to those observed in water entering the fishpond from the bay. Water quality parameters and inequal proximity to water flux sites suggested that a difference in residence time may exist along the north-south axis. In addition, ΔTA/ΔDIC relationships revealed a respiration signal in south end of the pond, which was enhanced at depth. While physical processes strongly affect CO2 and O2 across various temporal scales, spatial patterns in biological processes may also affect variability within the fishpond. These findings demonstrate that changes in water chemistry within the fishpond are the result of ecosystem restoration efforts. In turn, future management decisions at the fishpond will play an important role in preserving its viability as a healthy habitat for the intended marine species.https://www.frontiersin.org/articles/10.3389/fmars.2022.1049744/fulltotal alkalinitydissolved inorganic carbondissolved oxygencarbon dynamicsecosystem restorationblue carbon ecosystem |
| spellingShingle | Evan Lechner Yoshimi M. Rii Yoshimi M. Rii Yoshimi M. Rii Kathleen Ruttenberg Keli‘iahonui Kotubetey Christopher L. Sabine Assessment of CO2 and O2 spatial variability in an indigenous aquaculture system for restoration impacts Frontiers in Marine Science total alkalinity dissolved inorganic carbon dissolved oxygen carbon dynamics ecosystem restoration blue carbon ecosystem |
| title | Assessment of CO2 and O2 spatial variability in an indigenous aquaculture system for restoration impacts |
| title_full | Assessment of CO2 and O2 spatial variability in an indigenous aquaculture system for restoration impacts |
| title_fullStr | Assessment of CO2 and O2 spatial variability in an indigenous aquaculture system for restoration impacts |
| title_full_unstemmed | Assessment of CO2 and O2 spatial variability in an indigenous aquaculture system for restoration impacts |
| title_short | Assessment of CO2 and O2 spatial variability in an indigenous aquaculture system for restoration impacts |
| title_sort | assessment of co2 and o2 spatial variability in an indigenous aquaculture system for restoration impacts |
| topic | total alkalinity dissolved inorganic carbon dissolved oxygen carbon dynamics ecosystem restoration blue carbon ecosystem |
| url | https://www.frontiersin.org/articles/10.3389/fmars.2022.1049744/full |
| work_keys_str_mv | AT evanlechner assessmentofco2ando2spatialvariabilityinanindigenousaquaculturesystemforrestorationimpacts AT yoshimimrii assessmentofco2ando2spatialvariabilityinanindigenousaquaculturesystemforrestorationimpacts AT yoshimimrii assessmentofco2ando2spatialvariabilityinanindigenousaquaculturesystemforrestorationimpacts AT yoshimimrii assessmentofco2ando2spatialvariabilityinanindigenousaquaculturesystemforrestorationimpacts AT kathleenruttenberg assessmentofco2ando2spatialvariabilityinanindigenousaquaculturesystemforrestorationimpacts AT keliiahonuikotubetey assessmentofco2ando2spatialvariabilityinanindigenousaquaculturesystemforrestorationimpacts AT christopherlsabine assessmentofco2ando2spatialvariabilityinanindigenousaquaculturesystemforrestorationimpacts |