Microscopic life stages of Arctic kelp differ in their resilience and reproductive output in response to Arctic seasonality

Kelp forests are important habitats in the strongly environmentally and seasonally variable Arctic. There is a critical lack of knowledge about how seasonal conditions and climate change scenarios influence survival and reproduction of kelp early life stages. To better understand the regulation of k...

Full description

Bibliographic Details
Published in:European Journal of Phycology
Main Authors: Silva, Cláudio F., Pearson, Gareth A., Serrao, Ester A., Bartsch, Inka, Martins, Neusa
Format: Article in Journal/Newspaper
Language:unknown
Published: TAYLOR & FRANCIS LTD 2022
Subjects:
Online Access:https://epic.awi.de/id/eprint/55877/
https://hdl.handle.net/10013/epic.c166724c-8286-4019-9bb2-bd46142ad9fc
id ftawi:oai:epic.awi.de:55877
record_format openpolar
spelling ftawi:oai:epic.awi.de:55877 2024-09-15T17:50:29+00:00 Microscopic life stages of Arctic kelp differ in their resilience and reproductive output in response to Arctic seasonality Silva, Cláudio F. Pearson, Gareth A. Serrao, Ester A. Bartsch, Inka Martins, Neusa 2022-01-19 https://epic.awi.de/id/eprint/55877/ https://hdl.handle.net/10013/epic.c166724c-8286-4019-9bb2-bd46142ad9fc unknown TAYLOR & FRANCIS LTD Silva, C. F. , Pearson, G. A. orcid:0000-0002-0768-464X , Serrao, E. A. orcid:0000-0003-1316-658X , Bartsch, I. orcid:0000-0001-7609-2149 and Martins, N. orcid:0000-0003-4333-2905 (2022) Microscopic life stages of Arctic kelp differ in their resilience and reproductive output in response to Arctic seasonality , European Journal of Phycology . doi:10.1080/09670262.2021.2014983 <https://doi.org/10.1080/09670262.2021.2014983> , hdl:10013/epic.c166724c-8286-4019-9bb2-bd46142ad9fc EPIC3European Journal of Phycology, TAYLOR & FRANCIS LTD, ISSN: 0967-0262 Article isiRev 2022 ftawi https://doi.org/10.1080/09670262.2021.2014983 2024-06-24T04:28:46Z Kelp forests are important habitats in the strongly environmentally and seasonally variable Arctic. There is a critical lack of knowledge about how seasonal conditions and climate change scenarios influence survival and reproduction of kelp early life stages. To better understand the regulation of kelp life cycle processes in this harsh environment we focused on the physiological performance and reproductive success of early life stages in Alaria esculenta and Laminaria digitata from Kongsfjorden, Spitsbergen. Gametophyte growth and survival during Arctic winter and subsequent sporophyte recruitment under spring conditions were investigated. Winter conditions (2°C, complete darkness) halted gametophyte growth and prevented the onset of gametogenesis in both species. The gametophytes of L. digitata but not A. esculenta became fertile after returning to spring conditions, suggesting that sporogenesis, sexual reproduction and recruitment in A. esculenta must occur successively during summer/autumn while in L. digitata a new generation of sporophytes could develop from overwintering gametophytes. The effects of simulated canopy shading (offering protection against extreme irradiance stress, particularly as sea ice retreats), present-day and projected Arctic summer seawater temperatures, and nutrient levels on gametophyte survival, fertility and sporophyte recruitment success were also investigated in both species. A. esculenta gametophytes had greater survival and reproductive success than L. digitata, except under very low light (simulating dense canopy). In contrast, shading was required for reproductive success in L. digitata gametophytes. Predicted summer temperatures of 9°C reduced sexual reproduction in both species. Interactions observed between these environmental drivers probably reflect species-specific seasonal patterns of survival and reproduction. These differences between kelp species in response to abiotic factors and light levels (simulated canopy shading) suggest that climate change could alter ... Article in Journal/Newspaper Arctic Climate change Kongsfjord* Kongsfjorden Sea ice Spitsbergen Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) European Journal of Phycology 1 15
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 Kelp forests are important habitats in the strongly environmentally and seasonally variable Arctic. There is a critical lack of knowledge about how seasonal conditions and climate change scenarios influence survival and reproduction of kelp early life stages. To better understand the regulation of kelp life cycle processes in this harsh environment we focused on the physiological performance and reproductive success of early life stages in Alaria esculenta and Laminaria digitata from Kongsfjorden, Spitsbergen. Gametophyte growth and survival during Arctic winter and subsequent sporophyte recruitment under spring conditions were investigated. Winter conditions (2°C, complete darkness) halted gametophyte growth and prevented the onset of gametogenesis in both species. The gametophytes of L. digitata but not A. esculenta became fertile after returning to spring conditions, suggesting that sporogenesis, sexual reproduction and recruitment in A. esculenta must occur successively during summer/autumn while in L. digitata a new generation of sporophytes could develop from overwintering gametophytes. The effects of simulated canopy shading (offering protection against extreme irradiance stress, particularly as sea ice retreats), present-day and projected Arctic summer seawater temperatures, and nutrient levels on gametophyte survival, fertility and sporophyte recruitment success were also investigated in both species. A. esculenta gametophytes had greater survival and reproductive success than L. digitata, except under very low light (simulating dense canopy). In contrast, shading was required for reproductive success in L. digitata gametophytes. Predicted summer temperatures of 9°C reduced sexual reproduction in both species. Interactions observed between these environmental drivers probably reflect species-specific seasonal patterns of survival and reproduction. These differences between kelp species in response to abiotic factors and light levels (simulated canopy shading) suggest that climate change could alter ...
format Article in Journal/Newspaper
author Silva, Cláudio F.
Pearson, Gareth A.
Serrao, Ester A.
Bartsch, Inka
Martins, Neusa
spellingShingle Silva, Cláudio F.
Pearson, Gareth A.
Serrao, Ester A.
Bartsch, Inka
Martins, Neusa
Microscopic life stages of Arctic kelp differ in their resilience and reproductive output in response to Arctic seasonality
author_facet Silva, Cláudio F.
Pearson, Gareth A.
Serrao, Ester A.
Bartsch, Inka
Martins, Neusa
author_sort Silva, Cláudio F.
title Microscopic life stages of Arctic kelp differ in their resilience and reproductive output in response to Arctic seasonality
title_short Microscopic life stages of Arctic kelp differ in their resilience and reproductive output in response to Arctic seasonality
title_full Microscopic life stages of Arctic kelp differ in their resilience and reproductive output in response to Arctic seasonality
title_fullStr Microscopic life stages of Arctic kelp differ in their resilience and reproductive output in response to Arctic seasonality
title_full_unstemmed Microscopic life stages of Arctic kelp differ in their resilience and reproductive output in response to Arctic seasonality
title_sort microscopic life stages of arctic kelp differ in their resilience and reproductive output in response to arctic seasonality
publisher TAYLOR & FRANCIS LTD
publishDate 2022
url https://epic.awi.de/id/eprint/55877/
https://hdl.handle.net/10013/epic.c166724c-8286-4019-9bb2-bd46142ad9fc
genre Arctic
Climate change
Kongsfjord*
Kongsfjorden
Sea ice
Spitsbergen
genre_facet Arctic
Climate change
Kongsfjord*
Kongsfjorden
Sea ice
Spitsbergen
op_source EPIC3European Journal of Phycology, TAYLOR & FRANCIS LTD, ISSN: 0967-0262
op_relation Silva, C. F. , Pearson, G. A. orcid:0000-0002-0768-464X , Serrao, E. A. orcid:0000-0003-1316-658X , Bartsch, I. orcid:0000-0001-7609-2149 and Martins, N. orcid:0000-0003-4333-2905 (2022) Microscopic life stages of Arctic kelp differ in their resilience and reproductive output in response to Arctic seasonality , European Journal of Phycology . doi:10.1080/09670262.2021.2014983 <https://doi.org/10.1080/09670262.2021.2014983> , hdl:10013/epic.c166724c-8286-4019-9bb2-bd46142ad9fc
op_doi https://doi.org/10.1080/09670262.2021.2014983
container_title European Journal of Phycology
container_start_page 1
op_container_end_page 15
_version_ 1810292291455156224