Some Anatomical and Physiological Differences in Chorda Filum from Coastal Waters of Finland and Great Britain
A comparative study of Chorda filum populations from the British Isles (S 34‰) and the Baltic coast of Finland (S 6‰) has revealed differences in response by live adult thalli to treatment for 2 h with sea water of different salinities. Water uptake and loss by thalli differed significantly in salin...
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Cambridge University Press (CUP)
1985
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Online Access: | http://dx.doi.org/10.1017/s0025315400050463 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400050463 |
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crcambridgeupr:10.1017/s0025315400050463 2024-03-03T08:47:09+00:00 Some Anatomical and Physiological Differences in Chorda Filum from Coastal Waters of Finland and Great Britain Russell, G. 1985 http://dx.doi.org/10.1017/s0025315400050463 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400050463 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Journal of the Marine Biological Association of the United Kingdom volume 65, issue 2, page 343-349 ISSN 0025-3154 1469-7769 Aquatic Science journal-article 1985 crcambridgeupr https://doi.org/10.1017/s0025315400050463 2024-02-08T08:30:40Z A comparative study of Chorda filum populations from the British Isles (S 34‰) and the Baltic coast of Finland (S 6‰) has revealed differences in response by live adult thalli to treatment for 2 h with sea water of different salinities. Water uptake and loss by thalli differed significantly in salinities of х o‚ х 1/6, х ⅓ and х 1 ( = 34‰). British material showed severe cell disruption in freshwater whereas Finnish material did not. Killed thalli also behaved differently, British material showing little response to salinity treatment but Finnish plants continuing to react much as live tissues. Anatomical differences between populations were also observed, cortical cells in Finnish plants being significantly smaller than their British counterparts. Diaphragms traversing lumens of British material were simple, entire structures, but those in Finnish plants were deeply dissected and complex in organization. It is postulated that Baltic Chorda may have undergone a process of evolutionary divergence in response to its changed saline environment. INTRODUCTION Chorda filum (L.) Stackh. is one of several species of north Atlantic Phaeophyceae to be found in the inner Baltic Sea and Gulf of Bothnia; its geographical limit being associated with sea water salinity of approximately 4‰, (Waern, 1952; Hällfors et al. 1981). This species has been studied by Norton & South (1969) and South (1966) who traced the development of gametophytes and early sporophytes in culture media of different salinites. Although their cultures had been established from British material only, they felt able to argue from their results that the Baltic population did not constitute ‘… a different physiological strain specially adapted to the extreme environmental conditions prevailing there’. Article in Journal/Newspaper North Atlantic Cambridge University Press Hällfors ENVELOPE(23.450,23.450,65.933,65.933) Journal of the Marine Biological Association of the United Kingdom 65 2 343 349 |
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Open Polar |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Aquatic Science |
spellingShingle |
Aquatic Science Russell, G. Some Anatomical and Physiological Differences in Chorda Filum from Coastal Waters of Finland and Great Britain |
topic_facet |
Aquatic Science |
description |
A comparative study of Chorda filum populations from the British Isles (S 34‰) and the Baltic coast of Finland (S 6‰) has revealed differences in response by live adult thalli to treatment for 2 h with sea water of different salinities. Water uptake and loss by thalli differed significantly in salinities of х o‚ х 1/6, х ⅓ and х 1 ( = 34‰). British material showed severe cell disruption in freshwater whereas Finnish material did not. Killed thalli also behaved differently, British material showing little response to salinity treatment but Finnish plants continuing to react much as live tissues. Anatomical differences between populations were also observed, cortical cells in Finnish plants being significantly smaller than their British counterparts. Diaphragms traversing lumens of British material were simple, entire structures, but those in Finnish plants were deeply dissected and complex in organization. It is postulated that Baltic Chorda may have undergone a process of evolutionary divergence in response to its changed saline environment. INTRODUCTION Chorda filum (L.) Stackh. is one of several species of north Atlantic Phaeophyceae to be found in the inner Baltic Sea and Gulf of Bothnia; its geographical limit being associated with sea water salinity of approximately 4‰, (Waern, 1952; Hällfors et al. 1981). This species has been studied by Norton & South (1969) and South (1966) who traced the development of gametophytes and early sporophytes in culture media of different salinites. Although their cultures had been established from British material only, they felt able to argue from their results that the Baltic population did not constitute ‘… a different physiological strain specially adapted to the extreme environmental conditions prevailing there’. |
format |
Article in Journal/Newspaper |
author |
Russell, G. |
author_facet |
Russell, G. |
author_sort |
Russell, G. |
title |
Some Anatomical and Physiological Differences in Chorda Filum from Coastal Waters of Finland and Great Britain |
title_short |
Some Anatomical and Physiological Differences in Chorda Filum from Coastal Waters of Finland and Great Britain |
title_full |
Some Anatomical and Physiological Differences in Chorda Filum from Coastal Waters of Finland and Great Britain |
title_fullStr |
Some Anatomical and Physiological Differences in Chorda Filum from Coastal Waters of Finland and Great Britain |
title_full_unstemmed |
Some Anatomical and Physiological Differences in Chorda Filum from Coastal Waters of Finland and Great Britain |
title_sort |
some anatomical and physiological differences in chorda filum from coastal waters of finland and great britain |
publisher |
Cambridge University Press (CUP) |
publishDate |
1985 |
url |
http://dx.doi.org/10.1017/s0025315400050463 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400050463 |
long_lat |
ENVELOPE(23.450,23.450,65.933,65.933) |
geographic |
Hällfors |
geographic_facet |
Hällfors |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Journal of the Marine Biological Association of the United Kingdom volume 65, issue 2, page 343-349 ISSN 0025-3154 1469-7769 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0025315400050463 |
container_title |
Journal of the Marine Biological Association of the United Kingdom |
container_volume |
65 |
container_issue |
2 |
container_start_page |
343 |
op_container_end_page |
349 |
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1792503292350169088 |