Downward carbon transport by diel vertical migration of the copepods Metridia pacifica and Metridia okhotensis in the Oyashio region of the western subarctic Pacific Ocean
Seasonal change in the downward carbon transport due to respiration and mortality through diel vertical migration (DVM) of the calanoid copepods Metridia pacifica and Metridia okhotensis was estimated in the Oyashio region, western subarctic Pacific during six cruises from June 2001 to June 2002. M....
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| creator | Takahashi, Kazutaka Kuwata, Akira Sugisaki, Hiroya Uchikawa, Kazuhisa Saito, Hiroaki |
| description | Seasonal change in the downward carbon transport due to respiration and mortality through diel vertical migration (DVM) of the calanoid copepods
Metridia pacifica and
Metridia okhotensis was estimated in the Oyashio region, western subarctic Pacific during six cruises from June 2001 to June 2002.
M. pacifica (C4, C5 and adult females) was an active migratory species throughout the year though its DVM amplitude varied among seasons and stages. The mean distribution depths of adult females during the daytime were positively related with the illumination level in the water column, being shallowest in April and deepest in January.
M. okhotensis generally showed less-extensive migrations than
M. pacifica. Therefore, together with their lower abundance, this species is considered to be a less-important mechanism of downward transport of carbon except for April when their DVM was more active and descended deeper than
M. pacifica, which remained in the upper 150
m even during the daytime. The mean migrating biomass of the two
Metridia species was 558
mg
C
m
−2
d
−1 and was high during summer to winter (263–1676
mg
C
m
−2
d
−1) and low during spring (59–63
mg
C
m
−2
d
−1). Total downward flux through DVM fluctuated between 1.0 and 20.0
mg
C
m
−2
d
−1 with an annual mean of 8.0
mg
C
m
−2
d
−1. Contribution of the respiratory flux was greater than the mortality flux and accounted for 64–98% of total migratory flux throughout the year except for January when contribution of both fluxes was equal. Overall the annual carbon transport by DVM of
Metridia spp. was estimated as 3.0
g
C
m
−2
year
−1, corresponding to 15% of the annual total POC flux at 150
m at the study site, suggesting that DVM is a significant process for carbon export in the subarctic region as well as that in tropical and subtropical oceanic regions. Since DVM in
M. pacifica is more active during the non-bloom season when the gravitational flux of particulate matter is low, this species plays an important role in driving the biological pump in the subarctic Pacific during summer to winter. |
| doi_str_mv | 10.1016/j.dsr.2009.05.006 |
| format | Article |
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Metridia pacifica and
Metridia okhotensis was estimated in the Oyashio region, western subarctic Pacific during six cruises from June 2001 to June 2002.
M. pacifica (C4, C5 and adult females) was an active migratory species throughout the year though its DVM amplitude varied among seasons and stages. The mean distribution depths of adult females during the daytime were positively related with the illumination level in the water column, being shallowest in April and deepest in January.
M. okhotensis generally showed less-extensive migrations than
M. pacifica. Therefore, together with their lower abundance, this species is considered to be a less-important mechanism of downward transport of carbon except for April when their DVM was more active and descended deeper than
M. pacifica, which remained in the upper 150
m even during the daytime. The mean migrating biomass of the two
Metridia species was 558
mg
C
m
−2
d
−1 and was high during summer to winter (263–1676
mg
C
m
−2
d
−1) and low during spring (59–63
mg
C
m
−2
d
−1). Total downward flux through DVM fluctuated between 1.0 and 20.0
mg
C
m
−2
d
−1 with an annual mean of 8.0
mg
C
m
−2
d
−1. Contribution of the respiratory flux was greater than the mortality flux and accounted for 64–98% of total migratory flux throughout the year except for January when contribution of both fluxes was equal. Overall the annual carbon transport by DVM of
Metridia spp. was estimated as 3.0
g
C
m
−2
year
−1, corresponding to 15% of the annual total POC flux at 150
m at the study site, suggesting that DVM is a significant process for carbon export in the subarctic region as well as that in tropical and subtropical oceanic regions. Since DVM in
M. pacifica is more active during the non-bloom season when the gravitational flux of particulate matter is low, this species plays an important role in driving the biological pump in the subarctic Pacific during summer to winter.</description><identifier>ISSN: 0967-0637</identifier><identifier>EISSN: 1879-0119</identifier><identifier>DOI: 10.1016/j.dsr.2009.05.006</identifier><language>eng</language><publisher>Kidlington: Elsevier Ltd</publisher><subject>Active flux ; Animal and plant ecology ; Animal, plant and microbial ecology ; Biological and medical sciences ; Carbon ; Crustaceans ; Earth, ocean, space ; Exact sciences and technology ; External geophysics ; Fundamental and applied biological sciences. Psychology ; Mesozooplankton ; Micronekton ; Migration ; Mortality ; Myctophids ; Oceans ; Physics of the oceans ; Predation ; Respiration ; Sea water ecosystems ; Seasons ; Synecology</subject><ispartof>Deep-sea research. Part I, Oceanographic research papers, 2009-10, Vol.56 (10), p.1777-1791</ispartof><rights>2009</rights><rights>2015 INIST-CNRS</rights><rights>Copyright Pergamon Press Inc. Oct 2009</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c420t-4f4749005779e0843baf218b2de874558f4e5b1c8f03f72caca406463981f783</citedby><cites>FETCH-LOGICAL-c420t-4f4749005779e0843baf218b2de874558f4e5b1c8f03f72caca406463981f783</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0967063709000983$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3536,27903,27904,65309</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=21896265$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Takahashi, Kazutaka</creatorcontrib><creatorcontrib>Kuwata, Akira</creatorcontrib><creatorcontrib>Sugisaki, Hiroya</creatorcontrib><creatorcontrib>Uchikawa, Kazuhisa</creatorcontrib><creatorcontrib>Saito, Hiroaki</creatorcontrib><title>Downward carbon transport by diel vertical migration of the copepods Metridia pacifica and Metridia okhotensis in the Oyashio region of the western subarctic Pacific Ocean</title><title>Deep-sea research. Part I, Oceanographic research papers</title><description>Seasonal change in the downward carbon transport due to respiration and mortality through diel vertical migration (DVM) of the calanoid copepods
Metridia pacifica and
Metridia okhotensis was estimated in the Oyashio region, western subarctic Pacific during six cruises from June 2001 to June 2002.
M. pacifica (C4, C5 and adult females) was an active migratory species throughout the year though its DVM amplitude varied among seasons and stages. The mean distribution depths of adult females during the daytime were positively related with the illumination level in the water column, being shallowest in April and deepest in January.
M. okhotensis generally showed less-extensive migrations than
M. pacifica. Therefore, together with their lower abundance, this species is considered to be a less-important mechanism of downward transport of carbon except for April when their DVM was more active and descended deeper than
M. pacifica, which remained in the upper 150
m even during the daytime. The mean migrating biomass of the two
Metridia species was 558
mg
C
m
−2
d
−1 and was high during summer to winter (263–1676
mg
C
m
−2
d
−1) and low during spring (59–63
mg
C
m
−2
d
−1). Total downward flux through DVM fluctuated between 1.0 and 20.0
mg
C
m
−2
d
−1 with an annual mean of 8.0
mg
C
m
−2
d
−1. Contribution of the respiratory flux was greater than the mortality flux and accounted for 64–98% of total migratory flux throughout the year except for January when contribution of both fluxes was equal. Overall the annual carbon transport by DVM of
Metridia spp. was estimated as 3.0
g
C
m
−2
year
−1, corresponding to 15% of the annual total POC flux at 150
m at the study site, suggesting that DVM is a significant process for carbon export in the subarctic region as well as that in tropical and subtropical oceanic regions. Since DVM in
M. pacifica is more active during the non-bloom season when the gravitational flux of particulate matter is low, this species plays an important role in driving the biological pump in the subarctic Pacific during summer to winter.</description><subject>Active flux</subject><subject>Animal and plant ecology</subject><subject>Animal, plant and microbial ecology</subject><subject>Biological and medical sciences</subject><subject>Carbon</subject><subject>Crustaceans</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>External geophysics</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Mesozooplankton</subject><subject>Micronekton</subject><subject>Migration</subject><subject>Mortality</subject><subject>Myctophids</subject><subject>Oceans</subject><subject>Physics of the oceans</subject><subject>Predation</subject><subject>Respiration</subject><subject>Sea water ecosystems</subject><subject>Seasons</subject><subject>Synecology</subject><issn>0967-0637</issn><issn>1879-0119</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><recordid>eNp9kc1uFDEQhEcIJJYkD5CbhcRxhvb8eGxxQuFXSrQccrc8nnbWy8Ye2t6s9pl4SRw2Ak6cLFlfVXV3VdUlh4YDF2-3zZyoaQFUA0MDIJ5VKy5HVQPn6nm1AiXGGkQ3vqxepbQFKCIJq-rnh3gIB0Mzs4amGFgmE9ISKbPpyGaPO_aAlL01O3bv78hkX6DoWN4gs3HBJc6J3WAmP3vDFmO9KzAzYf77G79vYsaQfGI-_FaujyZtfGSEd__4HTBlpMDSfjJkSyj7dvJja4smnFcvnNklvHh6z6rbTx9vr77U1-vPX6_eX9e2byHXvevHXgEM46gQZN9NxrVcTu2McuyHQboeh4lb6aBzY2uNNT2IXnRKcjfK7qx6fbJdKP7Yl5H0Nu4plETNlRCqYKJA_ARZiikROr2Qvzd01Bz0YyN6q0sj-rERDYMujRTNmydjk8o9Xbm09emPsMyoRCuGwr07cViWfPBIOlmPweLsCW3Wc_T_SfkFvgSjlw</recordid><startdate>20091001</startdate><enddate>20091001</enddate><creator>Takahashi, Kazutaka</creator><creator>Kuwata, Akira</creator><creator>Sugisaki, Hiroya</creator><creator>Uchikawa, Kazuhisa</creator><creator>Saito, Hiroaki</creator><general>Elsevier Ltd</general><general>Elsevier</general><general>Pergamon Press Inc</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20091001</creationdate><title>Downward carbon transport by diel vertical migration of the copepods Metridia pacifica and Metridia okhotensis in the Oyashio region of the western subarctic Pacific Ocean</title><author>Takahashi, Kazutaka ; Kuwata, Akira ; Sugisaki, Hiroya ; Uchikawa, Kazuhisa ; Saito, Hiroaki</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c420t-4f4749005779e0843baf218b2de874558f4e5b1c8f03f72caca406463981f783</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>Active flux</topic><topic>Animal and plant ecology</topic><topic>Animal, plant and microbial ecology</topic><topic>Biological and medical sciences</topic><topic>Carbon</topic><topic>Crustaceans</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><topic>External geophysics</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Mesozooplankton</topic><topic>Micronekton</topic><topic>Migration</topic><topic>Mortality</topic><topic>Myctophids</topic><topic>Oceans</topic><topic>Physics of the oceans</topic><topic>Predation</topic><topic>Respiration</topic><topic>Sea water ecosystems</topic><topic>Seasons</topic><topic>Synecology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Takahashi, Kazutaka</creatorcontrib><creatorcontrib>Kuwata, Akira</creatorcontrib><creatorcontrib>Sugisaki, Hiroya</creatorcontrib><creatorcontrib>Uchikawa, Kazuhisa</creatorcontrib><creatorcontrib>Saito, Hiroaki</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><jtitle>Deep-sea research. Part I, Oceanographic research papers</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Takahashi, Kazutaka</au><au>Kuwata, Akira</au><au>Sugisaki, Hiroya</au><au>Uchikawa, Kazuhisa</au><au>Saito, Hiroaki</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Downward carbon transport by diel vertical migration of the copepods Metridia pacifica and Metridia okhotensis in the Oyashio region of the western subarctic Pacific Ocean</atitle><jtitle>Deep-sea research. Part I, Oceanographic research papers</jtitle><date>2009-10-01</date><risdate>2009</risdate><volume>56</volume><issue>10</issue><spage>1777</spage><epage>1791</epage><pages>1777-1791</pages><issn>0967-0637</issn><eissn>1879-0119</eissn><abstract>Seasonal change in the downward carbon transport due to respiration and mortality through diel vertical migration (DVM) of the calanoid copepods
Metridia pacifica and
Metridia okhotensis was estimated in the Oyashio region, western subarctic Pacific during six cruises from June 2001 to June 2002.
M. pacifica (C4, C5 and adult females) was an active migratory species throughout the year though its DVM amplitude varied among seasons and stages. The mean distribution depths of adult females during the daytime were positively related with the illumination level in the water column, being shallowest in April and deepest in January.
M. okhotensis generally showed less-extensive migrations than
M. pacifica. Therefore, together with their lower abundance, this species is considered to be a less-important mechanism of downward transport of carbon except for April when their DVM was more active and descended deeper than
M. pacifica, which remained in the upper 150
m even during the daytime. The mean migrating biomass of the two
Metridia species was 558
mg
C
m
−2
d
−1 and was high during summer to winter (263–1676
mg
C
m
−2
d
−1) and low during spring (59–63
mg
C
m
−2
d
−1). Total downward flux through DVM fluctuated between 1.0 and 20.0
mg
C
m
−2
d
−1 with an annual mean of 8.0
mg
C
m
−2
d
−1. Contribution of the respiratory flux was greater than the mortality flux and accounted for 64–98% of total migratory flux throughout the year except for January when contribution of both fluxes was equal. Overall the annual carbon transport by DVM of
Metridia spp. was estimated as 3.0
g
C
m
−2
year
−1, corresponding to 15% of the annual total POC flux at 150
m at the study site, suggesting that DVM is a significant process for carbon export in the subarctic region as well as that in tropical and subtropical oceanic regions. Since DVM in
M. pacifica is more active during the non-bloom season when the gravitational flux of particulate matter is low, this species plays an important role in driving the biological pump in the subarctic Pacific during summer to winter.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.dsr.2009.05.006</doi><tpages>15</tpages></addata></record> |
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| identifier | ISSN: 0967-0637 |
| ispartof | Deep-sea research. Part I, Oceanographic research papers, 2009-10, Vol.56 (10), p.1777-1791 |
| issn | 0967-0637 1879-0119 |
| language | eng |
| recordid | cdi_proquest_journals_196699816 |
| source | Elsevier ScienceDirect Journals |
| subjects | Active flux Animal and plant ecology Animal, plant and microbial ecology Biological and medical sciences Carbon Crustaceans Earth, ocean, space Exact sciences and technology External geophysics Fundamental and applied biological sciences. Psychology Mesozooplankton Micronekton Migration Mortality Myctophids Oceans Physics of the oceans Predation Respiration Sea water ecosystems Seasons Synecology |
| title | Downward carbon transport by diel vertical migration of the copepods Metridia pacifica and Metridia okhotensis in the Oyashio region of the western subarctic Pacific Ocean |
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