The impact of salps (Salpa thompsoni) on the Antarctic krill population (Euphausia superba): an individual-based modelling study
Krill (Euphausia superba) and salps (Salpa thompsoni) are key macrozooplankton grazers in the Southern Ocean ecosystem. However, due to differing habitat requirements, both species previously exhibited little spatial overlap. With ongoing climate change-induced seawater temperature increase and regi...
Published in: | Ecological Processes |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Springer Nature
2023
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/58145/ https://epic.awi.de/id/eprint/58145/1/2023,%20Pietzsch%20et%20al.%202023.pdf https://doi.org/10.1186/s13717-023-00462-9 https://hdl.handle.net/10013/epic.d59679ab-1d2f-4558-b99e-1397e8cdd624 |
id |
ftawi:oai:epic.awi.de:58145 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:58145 2023-12-24T10:11:31+01:00 The impact of salps (Salpa thompsoni) on the Antarctic krill population (Euphausia superba): an individual-based modelling study Pietzsch, Bruno Walter Schmidt, Aaron Groeneveld, Jürgen Bahlburg, Dominik Meyer, Bettina Berger, Uta 2023-12-01 application/pdf https://epic.awi.de/id/eprint/58145/ https://epic.awi.de/id/eprint/58145/1/2023,%20Pietzsch%20et%20al.%202023.pdf https://doi.org/10.1186/s13717-023-00462-9 https://hdl.handle.net/10013/epic.d59679ab-1d2f-4558-b99e-1397e8cdd624 unknown Springer Nature https://epic.awi.de/id/eprint/58145/1/2023,%20Pietzsch%20et%20al.%202023.pdf Pietzsch, B. W. , Schmidt, A. , Groeneveld, J. , Bahlburg, D. , Meyer, B. orcid:0000-0001-6804-9896 and Berger, U. (2023) The impact of salps (Salpa thompsoni) on the Antarctic krill population (Euphausia superba): an individual-based modelling study , Ecological Processes, 12 (1), p. 50 . doi:10.1186/s13717-023-00462-9 <https://doi.org/10.1186/s13717-023-00462-9> , hdl:10013/epic.d59679ab-1d2f-4558-b99e-1397e8cdd624 EPIC3Ecological Processes, Springer Nature, 12(1), pp. 50-50, ISSN: 2192-1709 Article isiRev 2023 ftawi https://doi.org/10.1186/s13717-023-00462-9 2023-11-27T00:23:17Z Krill (Euphausia superba) and salps (Salpa thompsoni) are key macrozooplankton grazers in the Southern Ocean ecosystem. However, due to differing habitat requirements, both species previously exhibited little spatial overlap. With ongoing climate change-induced seawater temperature increase and regional sea ice loss, salps can now extend their spatial distribution into historically krill-dominated areas and increase rapidly due to asexual reproduction when environmental conditions are favorable. Understanding the potential effects on krill is crucial, since krill is a species of exceptional trophic significance in the Southern Ocean food web. Negative impacts on krill could trigger cascading effects on its predators and prey. To address this question, we combined two individual-based models on salps and krill, which describe the whole life cycle of salp individuals and the dynamic energy budget of individual krill. The resulting new model PEKRIS (PErformance of KRIll vs. Salps) simulates a krill population for 100 years under varying chlorophyll-a concentrations in the presence or absence of salps. All of the investigated krill population properties (abundance, mean length, and yearly egg production) were significantly impacted by the presence of salps. On the other hand, salp density was not impacted if krill were present. The medians of krill population properties deviated during variable maximum chlorophyll-a density per year when salps were introduced by − 99.9% (− 234 individuals per 1000 m3) for krill density, − 100% (− 22,062 eggs per 1000 m3) for krill eggs and − 0.9% (− 0.3 mm) for mean length of krill. If both species compete for the same food resource in a closed space, salps seem to inhibit krill populations. Further simulation studies should investigate whether this effect prevails if different phytoplankton sizes and consumption preferences of krill are implemented. Furthermore, direct predation of the two species or consumption of krill fecal pellets by salps could change the impact size of the ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Euphausia superba Sea ice Southern Ocean Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic Southern Ocean The Antarctic Ecological Processes 12 1 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Krill (Euphausia superba) and salps (Salpa thompsoni) are key macrozooplankton grazers in the Southern Ocean ecosystem. However, due to differing habitat requirements, both species previously exhibited little spatial overlap. With ongoing climate change-induced seawater temperature increase and regional sea ice loss, salps can now extend their spatial distribution into historically krill-dominated areas and increase rapidly due to asexual reproduction when environmental conditions are favorable. Understanding the potential effects on krill is crucial, since krill is a species of exceptional trophic significance in the Southern Ocean food web. Negative impacts on krill could trigger cascading effects on its predators and prey. To address this question, we combined two individual-based models on salps and krill, which describe the whole life cycle of salp individuals and the dynamic energy budget of individual krill. The resulting new model PEKRIS (PErformance of KRIll vs. Salps) simulates a krill population for 100 years under varying chlorophyll-a concentrations in the presence or absence of salps. All of the investigated krill population properties (abundance, mean length, and yearly egg production) were significantly impacted by the presence of salps. On the other hand, salp density was not impacted if krill were present. The medians of krill population properties deviated during variable maximum chlorophyll-a density per year when salps were introduced by − 99.9% (− 234 individuals per 1000 m3) for krill density, − 100% (− 22,062 eggs per 1000 m3) for krill eggs and − 0.9% (− 0.3 mm) for mean length of krill. If both species compete for the same food resource in a closed space, salps seem to inhibit krill populations. Further simulation studies should investigate whether this effect prevails if different phytoplankton sizes and consumption preferences of krill are implemented. Furthermore, direct predation of the two species or consumption of krill fecal pellets by salps could change the impact size of the ... |
format |
Article in Journal/Newspaper |
author |
Pietzsch, Bruno Walter Schmidt, Aaron Groeneveld, Jürgen Bahlburg, Dominik Meyer, Bettina Berger, Uta |
spellingShingle |
Pietzsch, Bruno Walter Schmidt, Aaron Groeneveld, Jürgen Bahlburg, Dominik Meyer, Bettina Berger, Uta The impact of salps (Salpa thompsoni) on the Antarctic krill population (Euphausia superba): an individual-based modelling study |
author_facet |
Pietzsch, Bruno Walter Schmidt, Aaron Groeneveld, Jürgen Bahlburg, Dominik Meyer, Bettina Berger, Uta |
author_sort |
Pietzsch, Bruno Walter |
title |
The impact of salps (Salpa thompsoni) on the Antarctic krill population (Euphausia superba): an individual-based modelling study |
title_short |
The impact of salps (Salpa thompsoni) on the Antarctic krill population (Euphausia superba): an individual-based modelling study |
title_full |
The impact of salps (Salpa thompsoni) on the Antarctic krill population (Euphausia superba): an individual-based modelling study |
title_fullStr |
The impact of salps (Salpa thompsoni) on the Antarctic krill population (Euphausia superba): an individual-based modelling study |
title_full_unstemmed |
The impact of salps (Salpa thompsoni) on the Antarctic krill population (Euphausia superba): an individual-based modelling study |
title_sort |
impact of salps (salpa thompsoni) on the antarctic krill population (euphausia superba): an individual-based modelling study |
publisher |
Springer Nature |
publishDate |
2023 |
url |
https://epic.awi.de/id/eprint/58145/ https://epic.awi.de/id/eprint/58145/1/2023,%20Pietzsch%20et%20al.%202023.pdf https://doi.org/10.1186/s13717-023-00462-9 https://hdl.handle.net/10013/epic.d59679ab-1d2f-4558-b99e-1397e8cdd624 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Euphausia superba Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Euphausia superba Sea ice Southern Ocean |
op_source |
EPIC3Ecological Processes, Springer Nature, 12(1), pp. 50-50, ISSN: 2192-1709 |
op_relation |
https://epic.awi.de/id/eprint/58145/1/2023,%20Pietzsch%20et%20al.%202023.pdf Pietzsch, B. W. , Schmidt, A. , Groeneveld, J. , Bahlburg, D. , Meyer, B. orcid:0000-0001-6804-9896 and Berger, U. (2023) The impact of salps (Salpa thompsoni) on the Antarctic krill population (Euphausia superba): an individual-based modelling study , Ecological Processes, 12 (1), p. 50 . doi:10.1186/s13717-023-00462-9 <https://doi.org/10.1186/s13717-023-00462-9> , hdl:10013/epic.d59679ab-1d2f-4558-b99e-1397e8cdd624 |
op_doi |
https://doi.org/10.1186/s13717-023-00462-9 |
container_title |
Ecological Processes |
container_volume |
12 |
container_issue |
1 |
_version_ |
1786166205629857792 |