Carbon flows in the benthic food web at the deep-sea observatory HAUSGARTEN (Fram Strait)
The HAUSGARTEN observatory is located in the eastern Fram Strait (Arctic Ocean) and used as long-term monitoring site to follow changes in the Arctic benthic ecosystem. Linear inverse modelling was applied to decipher carbon flows among the compartments of the benthic food web at the central HAUSGAR...
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| creator | van Oevelen, Dick Bergmann, Melanie Soetaert, Karline Bauerfeind, Eduard Hasemann, Christiane Klages, Michael Schewe, Ingo Soltwedel, Thomas Budaeva, Nataliya E. |
| description | The HAUSGARTEN observatory is located in the eastern Fram Strait (Arctic Ocean) and used as long-term monitoring site to follow changes in the Arctic benthic ecosystem. Linear inverse modelling was applied to decipher carbon flows among the compartments of the benthic food web at the central HAUSGARTEN station (2500
m) based on an empirical data set consisting of data on biomass, prokaryote production, total carbon deposition and community respiration. The model resolved 99 carbon flows among 4 abiotic and 10 biotic compartments, ranging from prokaryotes up to megafauna. Total carbon input was 3.78±0.31
mmol
C
m
−2
d
−1, which is a comparatively small fraction of total primary production in the area. The community respiration of 3.26±0.20
mmol
C
m
−2
d
−1 is dominated by prokaryotes (93%) and has lower contributions from surface-deposit feeding macro- (1.7%) and suspension feeding megafauna (1.9%), whereas contributions from nematode and other macro- and megabenthic compartments were limited to |
| doi_str_mv | 10.1016/j.dsr.2011.08.002 |
| format | Article |
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m) based on an empirical data set consisting of data on biomass, prokaryote production, total carbon deposition and community respiration. The model resolved 99 carbon flows among 4 abiotic and 10 biotic compartments, ranging from prokaryotes up to megafauna. Total carbon input was 3.78±0.31
mmol
C
m
−2
d
−1, which is a comparatively small fraction of total primary production in the area. The community respiration of 3.26±0.20
mmol
C
m
−2
d
−1 is dominated by prokaryotes (93%) and has lower contributions from surface-deposit feeding macro- (1.7%) and suspension feeding megafauna (1.9%), whereas contributions from nematode and other macro- and megabenthic compartments were limited to <1%. The high prokaryotic contribution to carbon processing suggests that functioning of the benthic food web at the central HAUSGARTEN station is comparable to abyssal plain sediments that are characterised by strong energy limitation. Faunal diet compositions suggest that labile detritus is important for deposit-feeding nematodes (24% of their diet) and surface-deposit feeding macrofauna (∼44%), but that semi-labile detritus is more important in the diets of deposit-feeding macro- and megafauna. Dependency indices on these food sources were also calculated as these integrate direct (i.e. direct grazing and predator–prey interactions) and indirect (i.e. longer loops in the food web) pathways in the food web. Projected sea-ice retreats for the Arctic Ocean typically anticipate a decrease in the labile detritus flux to the already food-limited benthic food web. The dependency indices indicate that faunal compartments depend similarly on labile and semi-labile detritus, which suggests that the benthic biota may be more sensitive to changes in labile detritus inputs than when assessed from diet composition alone. Species-specific responses to different types of labile detritus inputs, e.g. pelagic algae versus sympagic algae, however, are presently unknown and are needed to assess the vulnerability of individual components of the benthic food web.
► Carbon flows in the benthic food web of the Arctic observatory HAUSGARTEN were modelled. ► Linear inverse model was based on a large set of empirical and literature data. ► Carbon processing in the benthic food web was dominated by bacteria. ► Dependency indices show fauna to depend equally on labile and semi-labile detritus. ► Food web is more sensitive to changes in labile detritus than assessed from diets alone.</description><identifier>ISSN: 0967-0637</identifier><identifier>EISSN: 1879-0119</identifier><identifier>DOI: 10.1016/j.dsr.2011.08.002</identifier><language>eng</language><publisher>Oxford: Elsevier Ltd</publisher><subject>Arctic Ocean ; Benthos ; Carbon ; Carbon processing ; Compartments ; Deposition ; Detritus ; Diets ; Feeding ; Food chains ; Food web ; Foods ; Marine ; Marine ecology ; Modelling ; Nematodes ; Prokaryotes ; Sediment</subject><ispartof>Deep-sea research. Part I, Oceanographic research papers, 2011-11, Vol.58 (11), p.1069-1083</ispartof><rights>2011 Elsevier Ltd</rights><rights>Copyright Pergamon Press Inc. Nov 2011</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c498t-2db3095b77a4c3dbe51ddf4193d44997566cdb7b6fcdc4b388191fd9bf6ce923</citedby><cites>FETCH-LOGICAL-c498t-2db3095b77a4c3dbe51ddf4193d44997566cdb7b6fcdc4b388191fd9bf6ce923</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0967063711001385$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3536,27903,27904,65309</link.rule.ids></links><search><creatorcontrib>van Oevelen, Dick</creatorcontrib><creatorcontrib>Bergmann, Melanie</creatorcontrib><creatorcontrib>Soetaert, Karline</creatorcontrib><creatorcontrib>Bauerfeind, Eduard</creatorcontrib><creatorcontrib>Hasemann, Christiane</creatorcontrib><creatorcontrib>Klages, Michael</creatorcontrib><creatorcontrib>Schewe, Ingo</creatorcontrib><creatorcontrib>Soltwedel, Thomas</creatorcontrib><creatorcontrib>Budaeva, Nataliya E.</creatorcontrib><title>Carbon flows in the benthic food web at the deep-sea observatory HAUSGARTEN (Fram Strait)</title><title>Deep-sea research. Part I, Oceanographic research papers</title><description>The HAUSGARTEN observatory is located in the eastern Fram Strait (Arctic Ocean) and used as long-term monitoring site to follow changes in the Arctic benthic ecosystem. Linear inverse modelling was applied to decipher carbon flows among the compartments of the benthic food web at the central HAUSGARTEN station (2500
m) based on an empirical data set consisting of data on biomass, prokaryote production, total carbon deposition and community respiration. The model resolved 99 carbon flows among 4 abiotic and 10 biotic compartments, ranging from prokaryotes up to megafauna. Total carbon input was 3.78±0.31
mmol
C
m
−2
d
−1, which is a comparatively small fraction of total primary production in the area. The community respiration of 3.26±0.20
mmol
C
m
−2
d
−1 is dominated by prokaryotes (93%) and has lower contributions from surface-deposit feeding macro- (1.7%) and suspension feeding megafauna (1.9%), whereas contributions from nematode and other macro- and megabenthic compartments were limited to <1%. The high prokaryotic contribution to carbon processing suggests that functioning of the benthic food web at the central HAUSGARTEN station is comparable to abyssal plain sediments that are characterised by strong energy limitation. Faunal diet compositions suggest that labile detritus is important for deposit-feeding nematodes (24% of their diet) and surface-deposit feeding macrofauna (∼44%), but that semi-labile detritus is more important in the diets of deposit-feeding macro- and megafauna. Dependency indices on these food sources were also calculated as these integrate direct (i.e. direct grazing and predator–prey interactions) and indirect (i.e. longer loops in the food web) pathways in the food web. Projected sea-ice retreats for the Arctic Ocean typically anticipate a decrease in the labile detritus flux to the already food-limited benthic food web. The dependency indices indicate that faunal compartments depend similarly on labile and semi-labile detritus, which suggests that the benthic biota may be more sensitive to changes in labile detritus inputs than when assessed from diet composition alone. Species-specific responses to different types of labile detritus inputs, e.g. pelagic algae versus sympagic algae, however, are presently unknown and are needed to assess the vulnerability of individual components of the benthic food web.
► Carbon flows in the benthic food web of the Arctic observatory HAUSGARTEN were modelled. ► Linear inverse model was based on a large set of empirical and literature data. ► Carbon processing in the benthic food web was dominated by bacteria. ► Dependency indices show fauna to depend equally on labile and semi-labile detritus. ► Food web is more sensitive to changes in labile detritus than assessed from diets alone.</description><subject>Arctic Ocean</subject><subject>Benthos</subject><subject>Carbon</subject><subject>Carbon processing</subject><subject>Compartments</subject><subject>Deposition</subject><subject>Detritus</subject><subject>Diets</subject><subject>Feeding</subject><subject>Food chains</subject><subject>Food web</subject><subject>Foods</subject><subject>Marine</subject><subject>Marine ecology</subject><subject>Modelling</subject><subject>Nematodes</subject><subject>Prokaryotes</subject><subject>Sediment</subject><issn>0967-0637</issn><issn>1879-0119</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNp9kU1rGzEQhkVooK7TH9CbyKXpYTfSrlYf5GRMviAk0LiHnoQ-ZomMvXIkOSH_vkrdUw85DQzPM8PMi9A3SlpKKD9ftz6ntiOUtkS2hHRHaEalUE3tqE9oRhQXDeG9-Iy-5LwmpEqSzNDvpUk2TnjcxNeMw4TLE2ALU3kKDo8xevwKFpvyt-8Bdk0Gg6PNkF5MiekN3yx-PV4vfq4u7_HZVTJb_FiSCeXHCToezSbD1391jlZXl6vlTXP3cH27XNw1jilZms7bnqjBCmGY672FgXo_Mqp6z5hSYuDceSssH513zPZSUkVHr-zIHaiun6Pvh7G7FJ_3kIvehuxgszETxH3WinS9UJzxSp59SFIuKOspr6vn6PQ_dB33aapnaKmk6NjAhwrRA-RSzDnBqHcpbE1605To91D0WtdQ9HsomkhdQ6nOxcGB-pGXAElnF2By4EMCV7SP4QP7D_ULkrI</recordid><startdate>20111101</startdate><enddate>20111101</enddate><creator>van Oevelen, Dick</creator><creator>Bergmann, Melanie</creator><creator>Soetaert, Karline</creator><creator>Bauerfeind, Eduard</creator><creator>Hasemann, Christiane</creator><creator>Klages, Michael</creator><creator>Schewe, Ingo</creator><creator>Soltwedel, Thomas</creator><creator>Budaeva, Nataliya E.</creator><general>Elsevier Ltd</general><general>Pergamon Press Inc</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>KR7</scope><scope>L7M</scope></search><sort><creationdate>20111101</creationdate><title>Carbon flows in the benthic food web at the deep-sea observatory HAUSGARTEN (Fram Strait)</title><author>van Oevelen, Dick ; Bergmann, Melanie ; Soetaert, Karline ; Bauerfeind, Eduard ; Hasemann, Christiane ; Klages, Michael ; Schewe, Ingo ; Soltwedel, Thomas ; Budaeva, Nataliya E.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c498t-2db3095b77a4c3dbe51ddf4193d44997566cdb7b6fcdc4b388191fd9bf6ce923</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Arctic Ocean</topic><topic>Benthos</topic><topic>Carbon</topic><topic>Carbon processing</topic><topic>Compartments</topic><topic>Deposition</topic><topic>Detritus</topic><topic>Diets</topic><topic>Feeding</topic><topic>Food chains</topic><topic>Food web</topic><topic>Foods</topic><topic>Marine</topic><topic>Marine ecology</topic><topic>Modelling</topic><topic>Nematodes</topic><topic>Prokaryotes</topic><topic>Sediment</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>van Oevelen, Dick</creatorcontrib><creatorcontrib>Bergmann, Melanie</creatorcontrib><creatorcontrib>Soetaert, Karline</creatorcontrib><creatorcontrib>Bauerfeind, Eduard</creatorcontrib><creatorcontrib>Hasemann, Christiane</creatorcontrib><creatorcontrib>Klages, Michael</creatorcontrib><creatorcontrib>Schewe, Ingo</creatorcontrib><creatorcontrib>Soltwedel, Thomas</creatorcontrib><creatorcontrib>Budaeva, Nataliya E.</creatorcontrib><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Deep-sea research. Part I, Oceanographic research papers</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>van Oevelen, Dick</au><au>Bergmann, Melanie</au><au>Soetaert, Karline</au><au>Bauerfeind, Eduard</au><au>Hasemann, Christiane</au><au>Klages, Michael</au><au>Schewe, Ingo</au><au>Soltwedel, Thomas</au><au>Budaeva, Nataliya E.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Carbon flows in the benthic food web at the deep-sea observatory HAUSGARTEN (Fram Strait)</atitle><jtitle>Deep-sea research. Part I, Oceanographic research papers</jtitle><date>2011-11-01</date><risdate>2011</risdate><volume>58</volume><issue>11</issue><spage>1069</spage><epage>1083</epage><pages>1069-1083</pages><issn>0967-0637</issn><eissn>1879-0119</eissn><abstract>The HAUSGARTEN observatory is located in the eastern Fram Strait (Arctic Ocean) and used as long-term monitoring site to follow changes in the Arctic benthic ecosystem. Linear inverse modelling was applied to decipher carbon flows among the compartments of the benthic food web at the central HAUSGARTEN station (2500
m) based on an empirical data set consisting of data on biomass, prokaryote production, total carbon deposition and community respiration. The model resolved 99 carbon flows among 4 abiotic and 10 biotic compartments, ranging from prokaryotes up to megafauna. Total carbon input was 3.78±0.31
mmol
C
m
−2
d
−1, which is a comparatively small fraction of total primary production in the area. The community respiration of 3.26±0.20
mmol
C
m
−2
d
−1 is dominated by prokaryotes (93%) and has lower contributions from surface-deposit feeding macro- (1.7%) and suspension feeding megafauna (1.9%), whereas contributions from nematode and other macro- and megabenthic compartments were limited to <1%. The high prokaryotic contribution to carbon processing suggests that functioning of the benthic food web at the central HAUSGARTEN station is comparable to abyssal plain sediments that are characterised by strong energy limitation. Faunal diet compositions suggest that labile detritus is important for deposit-feeding nematodes (24% of their diet) and surface-deposit feeding macrofauna (∼44%), but that semi-labile detritus is more important in the diets of deposit-feeding macro- and megafauna. Dependency indices on these food sources were also calculated as these integrate direct (i.e. direct grazing and predator–prey interactions) and indirect (i.e. longer loops in the food web) pathways in the food web. Projected sea-ice retreats for the Arctic Ocean typically anticipate a decrease in the labile detritus flux to the already food-limited benthic food web. The dependency indices indicate that faunal compartments depend similarly on labile and semi-labile detritus, which suggests that the benthic biota may be more sensitive to changes in labile detritus inputs than when assessed from diet composition alone. Species-specific responses to different types of labile detritus inputs, e.g. pelagic algae versus sympagic algae, however, are presently unknown and are needed to assess the vulnerability of individual components of the benthic food web.
► Carbon flows in the benthic food web of the Arctic observatory HAUSGARTEN were modelled. ► Linear inverse model was based on a large set of empirical and literature data. ► Carbon processing in the benthic food web was dominated by bacteria. ► Dependency indices show fauna to depend equally on labile and semi-labile detritus. ► Food web is more sensitive to changes in labile detritus than assessed from diets alone.</abstract><cop>Oxford</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.dsr.2011.08.002</doi><tpages>15</tpages><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0967-0637 |
| ispartof | Deep-sea research. Part I, Oceanographic research papers, 2011-11, Vol.58 (11), p.1069-1083 |
| issn | 0967-0637 1879-0119 |
| language | eng |
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| source | Elsevier ScienceDirect Journals |
| subjects | Arctic Ocean Benthos Carbon Carbon processing Compartments Deposition Detritus Diets Feeding Food chains Food web Foods Marine Marine ecology Modelling Nematodes Prokaryotes Sediment |
| title | Carbon flows in the benthic food web at the deep-sea observatory HAUSGARTEN (Fram Strait) |
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