Carbon and nitrogen assimilation in the Bering Sea clams Nuculana radiata and Macoma moesta
We analyzed bulk carbon and nitrogen stable isotope values (delta C-13 and delta N-15) of the benthic clams Nuculana radiata and Macoma moesta from the Bering Sea during controlled feeding experiments (spring of 2009 and 2010) using isotopically labeled sea ice algae. The aim was to determine the ab...
Main Authors: | , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Elsevier
2012
|
Subjects: | |
Online Access: | http://hdl.handle.net/11122/4660 |
id |
ftunivalaska:oai:scholarworks.alaska.edu:11122/4660 |
---|---|
record_format |
openpolar |
spelling |
ftunivalaska:oai:scholarworks.alaska.edu:11122/4660 2023-05-15T15:43:16+02:00 Carbon and nitrogen assimilation in the Bering Sea clams Nuculana radiata and Macoma moesta Weems, Jared Iken, Katrin Gradinger, Rolf Wooller, Matthew 2012-06 http://hdl.handle.net/11122/4660 unknown Elsevier Weems, J., et al. (2012). "Carbon and nitrogen assimilation in the Bering Sea clams Nuculana radiata and Macoma moesta." Journal of Experimental Marine Biology and Ecology 430: 32-42. 0022-0981 http://hdl.handle.net/11122/4660 Journal of Experimental Marine Biology and Ecology Article 2012 ftunivalaska 2023-02-23T21:36:16Z We analyzed bulk carbon and nitrogen stable isotope values (delta C-13 and delta N-15) of the benthic clams Nuculana radiata and Macoma moesta from the Bering Sea during controlled feeding experiments (spring of 2009 and 2010) using isotopically labeled sea ice algae. The aim was to determine the ability of these clam species to assimilate carbon and nitrogen from sea ice algae. Specimens were collected in the Bering Sea and placed into jars without sediment (2009, N. radiata only) or into natural sediment cores (2010, both species). The clams were offered isotopically enriched (both C and N) or non-enriched algal feeds for time periods of 42 (2009) and 18 d (2010). Isotopic assimilation rates for carbon and nitrogen were calculated using the change in the isotope ratios of the clams over the experimental time. N. radiata in the jar experiments had slow isotopic assimilation rates (0.01 to 0.23 parts per thousand d(-1)), with solvent-extractable organic matter/lipids taking up both of the isotope markers fastest and muscle tissue the slowest. Lipids may thus be particularly suitable to track the immediate ingestion of sea ice algal production in benthic consumers. M. moesta showed 30% higher isotopic assimilation compared to N. radiata in sediment cores, likely reflecting the different feeding behaviors of these two species. Based on our results, N. radiata is likely better able to utilize food sources buried in the sediment and may be more competitive over the sediment surface feeding M. moesta under conditions of reduced ice algal production in the northern Bering Sea. (C) 2012 Elsevier B.V. All rights reserved. This project was undertaken as a part of the National Science Foundation funded Bering Sea Ecosystem Study (BEST Project) #0732767awarded to R. Gradinger, K. Iken, and B. Bluhm at the University of Alaska Fairbanks. Additional research funding to J. Weems was provided by the UAF Center for Global Change Student Research Grant with funds from the Cooperative Institute for Alaska Research and the ... Article in Journal/Newspaper Bering Sea ice algae Sea ice Alaska University of Alaska: ScholarWorks@UA Bering Sea Fairbanks Iken ENVELOPE(88.949,88.949,70.523,70.523) |
institution |
Open Polar |
collection |
University of Alaska: ScholarWorks@UA |
op_collection_id |
ftunivalaska |
language |
unknown |
description |
We analyzed bulk carbon and nitrogen stable isotope values (delta C-13 and delta N-15) of the benthic clams Nuculana radiata and Macoma moesta from the Bering Sea during controlled feeding experiments (spring of 2009 and 2010) using isotopically labeled sea ice algae. The aim was to determine the ability of these clam species to assimilate carbon and nitrogen from sea ice algae. Specimens were collected in the Bering Sea and placed into jars without sediment (2009, N. radiata only) or into natural sediment cores (2010, both species). The clams were offered isotopically enriched (both C and N) or non-enriched algal feeds for time periods of 42 (2009) and 18 d (2010). Isotopic assimilation rates for carbon and nitrogen were calculated using the change in the isotope ratios of the clams over the experimental time. N. radiata in the jar experiments had slow isotopic assimilation rates (0.01 to 0.23 parts per thousand d(-1)), with solvent-extractable organic matter/lipids taking up both of the isotope markers fastest and muscle tissue the slowest. Lipids may thus be particularly suitable to track the immediate ingestion of sea ice algal production in benthic consumers. M. moesta showed 30% higher isotopic assimilation compared to N. radiata in sediment cores, likely reflecting the different feeding behaviors of these two species. Based on our results, N. radiata is likely better able to utilize food sources buried in the sediment and may be more competitive over the sediment surface feeding M. moesta under conditions of reduced ice algal production in the northern Bering Sea. (C) 2012 Elsevier B.V. All rights reserved. This project was undertaken as a part of the National Science Foundation funded Bering Sea Ecosystem Study (BEST Project) #0732767awarded to R. Gradinger, K. Iken, and B. Bluhm at the University of Alaska Fairbanks. Additional research funding to J. Weems was provided by the UAF Center for Global Change Student Research Grant with funds from the Cooperative Institute for Alaska Research and the ... |
format |
Article in Journal/Newspaper |
author |
Weems, Jared Iken, Katrin Gradinger, Rolf Wooller, Matthew |
spellingShingle |
Weems, Jared Iken, Katrin Gradinger, Rolf Wooller, Matthew Carbon and nitrogen assimilation in the Bering Sea clams Nuculana radiata and Macoma moesta |
author_facet |
Weems, Jared Iken, Katrin Gradinger, Rolf Wooller, Matthew |
author_sort |
Weems, Jared |
title |
Carbon and nitrogen assimilation in the Bering Sea clams Nuculana radiata and Macoma moesta |
title_short |
Carbon and nitrogen assimilation in the Bering Sea clams Nuculana radiata and Macoma moesta |
title_full |
Carbon and nitrogen assimilation in the Bering Sea clams Nuculana radiata and Macoma moesta |
title_fullStr |
Carbon and nitrogen assimilation in the Bering Sea clams Nuculana radiata and Macoma moesta |
title_full_unstemmed |
Carbon and nitrogen assimilation in the Bering Sea clams Nuculana radiata and Macoma moesta |
title_sort |
carbon and nitrogen assimilation in the bering sea clams nuculana radiata and macoma moesta |
publisher |
Elsevier |
publishDate |
2012 |
url |
http://hdl.handle.net/11122/4660 |
long_lat |
ENVELOPE(88.949,88.949,70.523,70.523) |
geographic |
Bering Sea Fairbanks Iken |
geographic_facet |
Bering Sea Fairbanks Iken |
genre |
Bering Sea ice algae Sea ice Alaska |
genre_facet |
Bering Sea ice algae Sea ice Alaska |
op_source |
Journal of Experimental Marine Biology and Ecology |
op_relation |
Weems, J., et al. (2012). "Carbon and nitrogen assimilation in the Bering Sea clams Nuculana radiata and Macoma moesta." Journal of Experimental Marine Biology and Ecology 430: 32-42. 0022-0981 http://hdl.handle.net/11122/4660 |
_version_ |
1766377335027662848 |