Trophic structure in the Western Tropical North Atlantic Ocean using Stable Isotope Abundances (δ15N and δ13C)
We investigated the biomass concentration and natural abundance of nitrogen and carbon stable isotopes (δ15N and δ13C) of size-fractionated zooplankton collected on two cruises to the Amazon River Plume (ARP) region. Mean animal biomass concentration was 3.34 mg/m2 during the day and 2.68 mg/m2 on C...
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Georgia Institute of Technology
2023
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Online Access: | https://hdl.handle.net/1853/72398 |
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ftgeorgiatech:oai:repository.gatech.edu:1853/72398 2023-08-27T04:10:55+02:00 Trophic structure in the Western Tropical North Atlantic Ocean using Stable Isotope Abundances (δ15N and δ13C) Salter, Shannon Marie Montoya, Joseph P. Jennofer, Glass Mark, Hay Natalie , Loick-Wilde Biology 2023-07-26T18:37:22Z application/pdf https://hdl.handle.net/1853/72398 unknown Georgia Institute of Technology https://hdl.handle.net/1853/72398 Text Thesis 2023 ftgeorgiatech 2023-08-07T18:01:43Z We investigated the biomass concentration and natural abundance of nitrogen and carbon stable isotopes (δ15N and δ13C) of size-fractionated zooplankton collected on two cruises to the Amazon River Plume (ARP) region. Mean animal biomass concentration was 3.34 mg/m2 during the day and 2.68 mg/m2 on Cruise EN614. The mean biomass on Cruise EN640 was 7.22 mg/m2 during the day and 9.60 mg/m2 at night. . Sampling stations were classified into habitat types based on biologically relevant physical and chemical parameters: the young plume core (YPC), old plume core (OPC), outer plume margin (OPM), western plume margin (WPM), and oceanic seawater (OSW). In general, zooplankton δ15N varied markedly and significantly among habitats for both cruises, with generally higher values in the YPC, OPC, WPM, and OSW habitats relative to the OPM habitat. Zooplankton δ15N values reflect the sources of nitrogen supporting biological production, and trophic processing within the food web. Suspended particles collected from these habitats showed lower δ15N values than the zooplankton, but we did not find a consistent increase in animal δ15N with size. Vertical migration led to diel shifts in zooplankton δ15N at the surface, with generally higher δ15N values at night than during the day during both cruises. Zooplankton δ13C values varied less than their δ15N, with no significant differences among habitats or with animal size. M.S. Thesis North Atlantic Georgia Institute of Technology: SMARTech - Scholarly Materials and Research at Georgia Tech |
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Georgia Institute of Technology: SMARTech - Scholarly Materials and Research at Georgia Tech |
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ftgeorgiatech |
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We investigated the biomass concentration and natural abundance of nitrogen and carbon stable isotopes (δ15N and δ13C) of size-fractionated zooplankton collected on two cruises to the Amazon River Plume (ARP) region. Mean animal biomass concentration was 3.34 mg/m2 during the day and 2.68 mg/m2 on Cruise EN614. The mean biomass on Cruise EN640 was 7.22 mg/m2 during the day and 9.60 mg/m2 at night. . Sampling stations were classified into habitat types based on biologically relevant physical and chemical parameters: the young plume core (YPC), old plume core (OPC), outer plume margin (OPM), western plume margin (WPM), and oceanic seawater (OSW). In general, zooplankton δ15N varied markedly and significantly among habitats for both cruises, with generally higher values in the YPC, OPC, WPM, and OSW habitats relative to the OPM habitat. Zooplankton δ15N values reflect the sources of nitrogen supporting biological production, and trophic processing within the food web. Suspended particles collected from these habitats showed lower δ15N values than the zooplankton, but we did not find a consistent increase in animal δ15N with size. Vertical migration led to diel shifts in zooplankton δ15N at the surface, with generally higher δ15N values at night than during the day during both cruises. Zooplankton δ13C values varied less than their δ15N, with no significant differences among habitats or with animal size. M.S. |
author2 |
Montoya, Joseph P. Jennofer, Glass Mark, Hay Natalie , Loick-Wilde Biology |
format |
Thesis |
author |
Salter, Shannon Marie |
spellingShingle |
Salter, Shannon Marie Trophic structure in the Western Tropical North Atlantic Ocean using Stable Isotope Abundances (δ15N and δ13C) |
author_facet |
Salter, Shannon Marie |
author_sort |
Salter, Shannon Marie |
title |
Trophic structure in the Western Tropical North Atlantic Ocean using Stable Isotope Abundances (δ15N and δ13C) |
title_short |
Trophic structure in the Western Tropical North Atlantic Ocean using Stable Isotope Abundances (δ15N and δ13C) |
title_full |
Trophic structure in the Western Tropical North Atlantic Ocean using Stable Isotope Abundances (δ15N and δ13C) |
title_fullStr |
Trophic structure in the Western Tropical North Atlantic Ocean using Stable Isotope Abundances (δ15N and δ13C) |
title_full_unstemmed |
Trophic structure in the Western Tropical North Atlantic Ocean using Stable Isotope Abundances (δ15N and δ13C) |
title_sort |
trophic structure in the western tropical north atlantic ocean using stable isotope abundances (δ15n and δ13c) |
publisher |
Georgia Institute of Technology |
publishDate |
2023 |
url |
https://hdl.handle.net/1853/72398 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://hdl.handle.net/1853/72398 |
_version_ |
1775353320768012288 |