Oithona similis in a high latitude ecosystem: abundance, distribution and temperature limitation of fecundity rates in a sac spawning copepod
In this study we report the abundance, fecundity and an index of mortality of Oithona similis across a large latitudinal and temperature range within the Southern Ocean. The abundance of O. similis was strongly related to temperature and to depthintegrated (0-100m) chorophyll a (Chl a), abundance in...
Published in: | Marine Biology |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Springer
2007
|
Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/9196/ https://nora.nerc.ac.uk/id/eprint/9196/1/O.similis__PW_AH.pdf |
id |
ftnerc:oai:nora.nerc.ac.uk:9196 |
---|---|
record_format |
openpolar |
spelling |
ftnerc:oai:nora.nerc.ac.uk:9196 2023-05-15T18:25:40+02:00 Oithona similis in a high latitude ecosystem: abundance, distribution and temperature limitation of fecundity rates in a sac spawning copepod Ward, Peter Hirst, Andrew 2007 text http://nora.nerc.ac.uk/id/eprint/9196/ https://nora.nerc.ac.uk/id/eprint/9196/1/O.similis__PW_AH.pdf en eng Springer https://nora.nerc.ac.uk/id/eprint/9196/1/O.similis__PW_AH.pdf Ward, Peter; Hirst, Andrew. 2007 Oithona similis in a high latitude ecosystem: abundance, distribution and temperature limitation of fecundity rates in a sac spawning copepod. Marine Biology, 151 (3). 1099-1110. https://doi.org/10.1007/s00227-006-0548-1 <https://doi.org/10.1007/s00227-006-0548-1> Marine Sciences Publication - Article PeerReviewed 2007 ftnerc https://doi.org/10.1007/s00227-006-0548-1 2023-02-04T19:25:56Z In this study we report the abundance, fecundity and an index of mortality of Oithona similis across a large latitudinal and temperature range within the Southern Ocean. The abundance of O. similis was strongly related to temperature and to depthintegrated (0-100m) chorophyll a (Chl a), abundance increasing with increasing temperature (and therefore increasing latitude) and Chl a. In situ total egg production rates and fecundity per female were significantly and positively related to temperature and Chl a. Egg hatch times lengthen as temperature decreases and in sac spawning species the next batch of eggs cannot be produced until the previous clutch hatch. Consequently, O. similis fecundity rates must rapidly decline at low temperatures, especially below 5oC. In situ fecundity rates were compared with a model of maximum fecundity, and were generally much lower, thus suggesting strong food limitation across the region studied. However the relationships of in situ and maximum rates to temperature were similar, confirming the importance of temperature. Further, as time taken to develop from egg to adult also rapidly extends with declining temperature, it is increasingly unlikely that O. similis will be able to 2 maintain its population against typical field mortality. Our findings have broad implications for the lower temperature range and hence geographic limits of O. similis, but also for the distribution of other sac spawning copepods and planktonic species generally Article in Journal/Newspaper Southern Ocean Copepods Natural Environment Research Council: NERC Open Research Archive Southern Ocean Marine Biology 151 3 1099 1110 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
topic |
Marine Sciences |
spellingShingle |
Marine Sciences Ward, Peter Hirst, Andrew Oithona similis in a high latitude ecosystem: abundance, distribution and temperature limitation of fecundity rates in a sac spawning copepod |
topic_facet |
Marine Sciences |
description |
In this study we report the abundance, fecundity and an index of mortality of Oithona similis across a large latitudinal and temperature range within the Southern Ocean. The abundance of O. similis was strongly related to temperature and to depthintegrated (0-100m) chorophyll a (Chl a), abundance increasing with increasing temperature (and therefore increasing latitude) and Chl a. In situ total egg production rates and fecundity per female were significantly and positively related to temperature and Chl a. Egg hatch times lengthen as temperature decreases and in sac spawning species the next batch of eggs cannot be produced until the previous clutch hatch. Consequently, O. similis fecundity rates must rapidly decline at low temperatures, especially below 5oC. In situ fecundity rates were compared with a model of maximum fecundity, and were generally much lower, thus suggesting strong food limitation across the region studied. However the relationships of in situ and maximum rates to temperature were similar, confirming the importance of temperature. Further, as time taken to develop from egg to adult also rapidly extends with declining temperature, it is increasingly unlikely that O. similis will be able to 2 maintain its population against typical field mortality. Our findings have broad implications for the lower temperature range and hence geographic limits of O. similis, but also for the distribution of other sac spawning copepods and planktonic species generally |
format |
Article in Journal/Newspaper |
author |
Ward, Peter Hirst, Andrew |
author_facet |
Ward, Peter Hirst, Andrew |
author_sort |
Ward, Peter |
title |
Oithona similis in a high latitude ecosystem: abundance, distribution and temperature limitation of fecundity rates in a sac spawning copepod |
title_short |
Oithona similis in a high latitude ecosystem: abundance, distribution and temperature limitation of fecundity rates in a sac spawning copepod |
title_full |
Oithona similis in a high latitude ecosystem: abundance, distribution and temperature limitation of fecundity rates in a sac spawning copepod |
title_fullStr |
Oithona similis in a high latitude ecosystem: abundance, distribution and temperature limitation of fecundity rates in a sac spawning copepod |
title_full_unstemmed |
Oithona similis in a high latitude ecosystem: abundance, distribution and temperature limitation of fecundity rates in a sac spawning copepod |
title_sort |
oithona similis in a high latitude ecosystem: abundance, distribution and temperature limitation of fecundity rates in a sac spawning copepod |
publisher |
Springer |
publishDate |
2007 |
url |
http://nora.nerc.ac.uk/id/eprint/9196/ https://nora.nerc.ac.uk/id/eprint/9196/1/O.similis__PW_AH.pdf |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean Copepods |
genre_facet |
Southern Ocean Copepods |
op_relation |
https://nora.nerc.ac.uk/id/eprint/9196/1/O.similis__PW_AH.pdf Ward, Peter; Hirst, Andrew. 2007 Oithona similis in a high latitude ecosystem: abundance, distribution and temperature limitation of fecundity rates in a sac spawning copepod. Marine Biology, 151 (3). 1099-1110. https://doi.org/10.1007/s00227-006-0548-1 <https://doi.org/10.1007/s00227-006-0548-1> |
op_doi |
https://doi.org/10.1007/s00227-006-0548-1 |
container_title |
Marine Biology |
container_volume |
151 |
container_issue |
3 |
container_start_page |
1099 |
op_container_end_page |
1110 |
_version_ |
1766207271910506496 |