Timing of Calanus finmarchicus diapause in stochastic environments
In environments with strong seasonality, many herbivorous zooplankton remain active only during the productive season and undergo a period of inactivity and suppressed development termed ‘diapause’ during the unproductive season. The ability to time the diapause entry and exit in response to the sea...
Published in: | Ecological Modelling |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
2021
|
Subjects: | |
Online Access: | https://hdl.handle.net/11250/2831770 https://doi.org/10.1016/j.ecolmodel.2021.109739 |
id |
ftunivbergen:oai:bora.uib.no:11250/2831770 |
---|---|
record_format |
openpolar |
spelling |
ftunivbergen:oai:bora.uib.no:11250/2831770 2023-05-15T15:47:57+02:00 Timing of Calanus finmarchicus diapause in stochastic environments Bandara, Kanchana Varpe, Øystein Maps, Frédéric Ji, Rubao Eiane, Ketil Tverberg, Vigdis 2021 application/pdf https://hdl.handle.net/11250/2831770 https://doi.org/10.1016/j.ecolmodel.2021.109739 eng eng Elsevier urn:issn:0304-3800 https://hdl.handle.net/11250/2831770 https://doi.org/10.1016/j.ecolmodel.2021.109739 cristin:1945291 Ecological Modelling. 2021, 460, 109739. Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2021 The Author(s). 109739 Ecological Modelling 460 Journal article Peer reviewed 2021 ftunivbergen https://doi.org/10.1016/j.ecolmodel.2021.109739 2023-03-14T17:44:07Z In environments with strong seasonality, many herbivorous zooplankton remain active only during the productive season and undergo a period of inactivity and suppressed development termed ‘diapause’ during the unproductive season. The ability to time the diapause entry and exit in response to the seasonality of the environment is thus essential for their survival. However, timing of diapause may become challenging when environmental conditions vary stochastically across shorter and longer timescales, and particularly when zooplankton lack external cues to predict these variations. In this study, we used a novel individual-based model to study the emerging patterns of diapause timing of the high-latitude marine herbivorous copepod Calanus finmarchicus under shorter- (6-h) and longer-term (interannual) environmental stochasticity. The model simulated growth, development, survival and reproduction (income breeding) of a C. finmarchicus population over multiple calendar years and traced the emergence of behavioral responses and life history strategies. The emergent timing of diapause entry and exit were robust to shorter-term environmental stochasticity, which was manifested through morphological (i.e., body and energy reserve sizes) and behavioral plasticity (i.e., diel vertical migration). Longer-term stochastic variations of temperature and food environments altered the timing of diapause entry, which occurred earlier in warmer years with higher growth potential and vice versa. Irrespective of the modelled environmental variability, diapause exit occurred asynchronously throughout the year. This appeared to be a consequence of a diversified bet hedging strategy, where parents spread the starvation mortality risk of ascending to the upper pelagial at food-deprived times of the year among their offspring. This was a potent strategy, particularly in simulations where the timing of the algal bloom varied stochastically between years, since a fraction of the population was present in the upper pelagial year-round and ... Article in Journal/Newspaper Calanus finmarchicus University of Bergen: Bergen Open Research Archive (BORA-UiB) Ecological Modelling 460 109739 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
In environments with strong seasonality, many herbivorous zooplankton remain active only during the productive season and undergo a period of inactivity and suppressed development termed ‘diapause’ during the unproductive season. The ability to time the diapause entry and exit in response to the seasonality of the environment is thus essential for their survival. However, timing of diapause may become challenging when environmental conditions vary stochastically across shorter and longer timescales, and particularly when zooplankton lack external cues to predict these variations. In this study, we used a novel individual-based model to study the emerging patterns of diapause timing of the high-latitude marine herbivorous copepod Calanus finmarchicus under shorter- (6-h) and longer-term (interannual) environmental stochasticity. The model simulated growth, development, survival and reproduction (income breeding) of a C. finmarchicus population over multiple calendar years and traced the emergence of behavioral responses and life history strategies. The emergent timing of diapause entry and exit were robust to shorter-term environmental stochasticity, which was manifested through morphological (i.e., body and energy reserve sizes) and behavioral plasticity (i.e., diel vertical migration). Longer-term stochastic variations of temperature and food environments altered the timing of diapause entry, which occurred earlier in warmer years with higher growth potential and vice versa. Irrespective of the modelled environmental variability, diapause exit occurred asynchronously throughout the year. This appeared to be a consequence of a diversified bet hedging strategy, where parents spread the starvation mortality risk of ascending to the upper pelagial at food-deprived times of the year among their offspring. This was a potent strategy, particularly in simulations where the timing of the algal bloom varied stochastically between years, since a fraction of the population was present in the upper pelagial year-round and ... |
format |
Article in Journal/Newspaper |
author |
Bandara, Kanchana Varpe, Øystein Maps, Frédéric Ji, Rubao Eiane, Ketil Tverberg, Vigdis |
spellingShingle |
Bandara, Kanchana Varpe, Øystein Maps, Frédéric Ji, Rubao Eiane, Ketil Tverberg, Vigdis Timing of Calanus finmarchicus diapause in stochastic environments |
author_facet |
Bandara, Kanchana Varpe, Øystein Maps, Frédéric Ji, Rubao Eiane, Ketil Tverberg, Vigdis |
author_sort |
Bandara, Kanchana |
title |
Timing of Calanus finmarchicus diapause in stochastic environments |
title_short |
Timing of Calanus finmarchicus diapause in stochastic environments |
title_full |
Timing of Calanus finmarchicus diapause in stochastic environments |
title_fullStr |
Timing of Calanus finmarchicus diapause in stochastic environments |
title_full_unstemmed |
Timing of Calanus finmarchicus diapause in stochastic environments |
title_sort |
timing of calanus finmarchicus diapause in stochastic environments |
publisher |
Elsevier |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2831770 https://doi.org/10.1016/j.ecolmodel.2021.109739 |
genre |
Calanus finmarchicus |
genre_facet |
Calanus finmarchicus |
op_source |
109739 Ecological Modelling 460 |
op_relation |
urn:issn:0304-3800 https://hdl.handle.net/11250/2831770 https://doi.org/10.1016/j.ecolmodel.2021.109739 cristin:1945291 Ecological Modelling. 2021, 460, 109739. |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2021 The Author(s). |
op_doi |
https://doi.org/10.1016/j.ecolmodel.2021.109739 |
container_title |
Ecological Modelling |
container_volume |
460 |
container_start_page |
109739 |
_version_ |
1766382940182282240 |