Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Biophysical interactions in the Iceland Basin
The Iceland Basin in the N. Atlantic has attracted considerable recent attention because the spring bloom in this region acts as the most powerful biological carbon pump anywhere in the world oceans. Furthermore, the link between primary productivity and herbivory by the calanoid copepod, Calanus fi...
Saved in:
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Biological Sciences
2017
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613289295380480 |
|---|---|
| access_status_str | Open Access |
| author | Harington, Amy |
| author2 | Lucas, Michael I |
| author_browse | Harington, Amy Lucas, Michael I |
| author_facet | Lucas, Michael I Harington, Amy |
| author_sort | Harington, Amy |
| collection | Thesis |
| description | The Iceland Basin in the N. Atlantic has attracted considerable recent attention because the spring bloom in this region acts as the most powerful biological carbon pump anywhere in the world oceans. Furthermore, the link between primary productivity and herbivory by the calanoid copepod, Calanus finmarchicus provides the trophic link between primary producers and the important commercial fishery for Atlantic Cod. However, one result of ocean warming is that the distribution of the cold water loving Calanus finmarchicus is being pushed northwards which adversely affects the food supply to juvenile Cod. Perhaps of more serious concern are concerns that the biological carbon pump may weaken as a result of increased thermal stratification and therefore reduce upward nitrate flux to drive nitrate-based export production. This was in fact confirmed at least in the study region which is dominated by regenerated production (f-ratio <0.5) which in turn suggests a shift in community structure from larger celled organisms to smaller celled organisms, characterised by long inefficient food chains. This project makes use of summer cruise data to the Iceland Basin last summer (2007) where measurements of 15N derived new production (NP) were made to add to previous seasonal (spring, winter) measurements of NP in the region. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/25790 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:33:45.686Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| publisher | Department of Biological Sciences |
| publisherStr | Department of Biological Sciences |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/25790 Biophysical interactions in the Iceland Basin Harington, Amy Lucas, Michael I Ecology The Iceland Basin in the N. Atlantic has attracted considerable recent attention because the spring bloom in this region acts as the most powerful biological carbon pump anywhere in the world oceans. Furthermore, the link between primary productivity and herbivory by the calanoid copepod, Calanus finmarchicus provides the trophic link between primary producers and the important commercial fishery for Atlantic Cod. However, one result of ocean warming is that the distribution of the cold water loving Calanus finmarchicus is being pushed northwards which adversely affects the food supply to juvenile Cod. Perhaps of more serious concern are concerns that the biological carbon pump may weaken as a result of increased thermal stratification and therefore reduce upward nitrate flux to drive nitrate-based export production. This was in fact confirmed at least in the study region which is dominated by regenerated production (f-ratio <0.5) which in turn suggests a shift in community structure from larger celled organisms to smaller celled organisms, characterised by long inefficient food chains. This project makes use of summer cruise data to the Iceland Basin last summer (2007) where measurements of 15N derived new production (NP) were made to add to previous seasonal (spring, winter) measurements of NP in the region. 2017-10-25T08:38:21Z 2017-10-25T08:38:21Z 2008 2017-02-21T10:17:20Z Bachelor Thesis Honours BSc (Hons) http://hdl.handle.net/11427/25790 eng application/pdf Department of Biological Sciences Faculty of Science University of Cape Town |
| spellingShingle | Ecology Harington, Amy Biophysical interactions in the Iceland Basin |
| thesis_degree_str | Bachelor's / Honours |
| title | Biophysical interactions in the Iceland Basin |
| title_full | Biophysical interactions in the Iceland Basin |
| title_fullStr | Biophysical interactions in the Iceland Basin |
| title_full_unstemmed | Biophysical interactions in the Iceland Basin |
| title_short | Biophysical interactions in the Iceland Basin |
| title_sort | biophysical interactions in the iceland basin |
| topic | Ecology |
| url | http://hdl.handle.net/11427/25790 |
| work_keys_str_mv | AT haringtonamy biophysicalinteractionsintheicelandbasin |