Modelling the influence of copepod behaviour on faecal pellet export at high latitudes
The contribution of faecal pellet (FP) production by zooplankton to the downward flux of particulate organic carbon (POC) can vary from <1 % to more than 90 % of total POC. This results from varying degrees of interception and consumption, and hence recycling, of FPs by zooplankton in the upper m...
Published in: | Polar Biology |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Springer
2013
|
Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/501661/ https://nora.nerc.ac.uk/id/eprint/501661/1/Wallace%20et%20al%20revised_final.doc https://doi.org/10.1007/s00300-013-1287-7 |
id |
ftnerc:oai:nora.nerc.ac.uk:501661 |
---|---|
record_format |
openpolar |
spelling |
ftnerc:oai:nora.nerc.ac.uk:501661 2023-05-15T18:02:01+02:00 Modelling the influence of copepod behaviour on faecal pellet export at high latitudes Wallace, M.I. Cottier, F.R. Brierley, A.S. Tarling, G.A. 2013-04 text http://nora.nerc.ac.uk/id/eprint/501661/ https://nora.nerc.ac.uk/id/eprint/501661/1/Wallace%20et%20al%20revised_final.doc https://doi.org/10.1007/s00300-013-1287-7 en eng Springer https://nora.nerc.ac.uk/id/eprint/501661/1/Wallace%20et%20al%20revised_final.doc Wallace, M.I.; Cottier, F.R.; Brierley, A.S.; Tarling, G.A. orcid:0000-0002-3753-5899 . 2013 Modelling the influence of copepod behaviour on faecal pellet export at high latitudes. Polar Biology, 36 (4). 579-592. https://doi.org/10.1007/s00300-013-1287-7 <https://doi.org/10.1007/s00300-013-1287-7> Marine Sciences Publication - Article PeerReviewed 2013 ftnerc https://doi.org/10.1007/s00300-013-1287-7 2023-02-04T19:36:52Z The contribution of faecal pellet (FP) production by zooplankton to the downward flux of particulate organic carbon (POC) can vary from <1 % to more than 90 % of total POC. This results from varying degrees of interception and consumption, and hence recycling, of FPs by zooplankton in the upper mixed layers, and the active transport of FP to depth via diel vertical migration (VM) of zooplankton. During mid-summer at high latitudes, synchronised diel VM ceases, but individual zooplankton may continue to make forays into and out of the surface layers. This study considers the relative importance of different VM behaviours on FP export at high latitudes. We focussed on copepods and parameterised an individual-based model using empirical measures of phytoplankton vertical distribution and the rate of FP production, as a function of food availability. FP production was estimated under three different behaviours common to high-latitude environments (1) no VM, (2) foray-type behaviour and (3) synchronised diel VM. Simulations were also made of how each of these behaviours would be observed by an acoustic Doppler current profiler (ADCP). The model found that the type of copepod behaviour made a substantial difference to the level of FP export to depth. In the absence of VM, all FPs were produced above 50 m, where the probability of eventual export to depth was low. In foray-type scenarios, FP production occurred between 0 and 80 m, although the majority occurred between 30 and 70 m depth. Greatest FP production in the deeper layers (>70 m) occurred when diel VM took place. Simulated ADCP vertical velocity fields from the foray-type scenario resembled field observations, particularly with regard to the occurrence of positive anomalies in deeper waters and negative anomalies in shallower waters. The model illustrates that active vertical flux of zooplankton FP can occur at high latitudes even when no synchronised VM is taking place. Article in Journal/Newspaper Polar Biology Copepods Natural Environment Research Council: NERC Open Research Archive Polar Biology 36 4 579 592 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
topic |
Marine Sciences |
spellingShingle |
Marine Sciences Wallace, M.I. Cottier, F.R. Brierley, A.S. Tarling, G.A. Modelling the influence of copepod behaviour on faecal pellet export at high latitudes |
topic_facet |
Marine Sciences |
description |
The contribution of faecal pellet (FP) production by zooplankton to the downward flux of particulate organic carbon (POC) can vary from <1 % to more than 90 % of total POC. This results from varying degrees of interception and consumption, and hence recycling, of FPs by zooplankton in the upper mixed layers, and the active transport of FP to depth via diel vertical migration (VM) of zooplankton. During mid-summer at high latitudes, synchronised diel VM ceases, but individual zooplankton may continue to make forays into and out of the surface layers. This study considers the relative importance of different VM behaviours on FP export at high latitudes. We focussed on copepods and parameterised an individual-based model using empirical measures of phytoplankton vertical distribution and the rate of FP production, as a function of food availability. FP production was estimated under three different behaviours common to high-latitude environments (1) no VM, (2) foray-type behaviour and (3) synchronised diel VM. Simulations were also made of how each of these behaviours would be observed by an acoustic Doppler current profiler (ADCP). The model found that the type of copepod behaviour made a substantial difference to the level of FP export to depth. In the absence of VM, all FPs were produced above 50 m, where the probability of eventual export to depth was low. In foray-type scenarios, FP production occurred between 0 and 80 m, although the majority occurred between 30 and 70 m depth. Greatest FP production in the deeper layers (>70 m) occurred when diel VM took place. Simulated ADCP vertical velocity fields from the foray-type scenario resembled field observations, particularly with regard to the occurrence of positive anomalies in deeper waters and negative anomalies in shallower waters. The model illustrates that active vertical flux of zooplankton FP can occur at high latitudes even when no synchronised VM is taking place. |
format |
Article in Journal/Newspaper |
author |
Wallace, M.I. Cottier, F.R. Brierley, A.S. Tarling, G.A. |
author_facet |
Wallace, M.I. Cottier, F.R. Brierley, A.S. Tarling, G.A. |
author_sort |
Wallace, M.I. |
title |
Modelling the influence of copepod behaviour on faecal pellet export at high latitudes |
title_short |
Modelling the influence of copepod behaviour on faecal pellet export at high latitudes |
title_full |
Modelling the influence of copepod behaviour on faecal pellet export at high latitudes |
title_fullStr |
Modelling the influence of copepod behaviour on faecal pellet export at high latitudes |
title_full_unstemmed |
Modelling the influence of copepod behaviour on faecal pellet export at high latitudes |
title_sort |
modelling the influence of copepod behaviour on faecal pellet export at high latitudes |
publisher |
Springer |
publishDate |
2013 |
url |
http://nora.nerc.ac.uk/id/eprint/501661/ https://nora.nerc.ac.uk/id/eprint/501661/1/Wallace%20et%20al%20revised_final.doc https://doi.org/10.1007/s00300-013-1287-7 |
genre |
Polar Biology Copepods |
genre_facet |
Polar Biology Copepods |
op_relation |
https://nora.nerc.ac.uk/id/eprint/501661/1/Wallace%20et%20al%20revised_final.doc Wallace, M.I.; Cottier, F.R.; Brierley, A.S.; Tarling, G.A. orcid:0000-0002-3753-5899 . 2013 Modelling the influence of copepod behaviour on faecal pellet export at high latitudes. Polar Biology, 36 (4). 579-592. https://doi.org/10.1007/s00300-013-1287-7 <https://doi.org/10.1007/s00300-013-1287-7> |
op_doi |
https://doi.org/10.1007/s00300-013-1287-7 |
container_title |
Polar Biology |
container_volume |
36 |
container_issue |
4 |
container_start_page |
579 |
op_container_end_page |
592 |
_version_ |
1766171675725922304 |