In situ photosynthesis and estimated annual production of the red macroalga Myriogramme mangini in relation to underwater irradiance at Signy island (Antarctica)
For the first time, photosynthesis of Myriogramme mangini (Gain) Skottsberg, one of the dominant red macroalgae in the sublittoral of Signy Island (South Orkney Islands), was studied in situ under natural irradiance levels in specially developed incubation chambers. M. mangini is adapted to low irra...
Published in: | Antarctic Science |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
1996
|
Subjects: | |
Online Access: | https://pure.knaw.nl/portal/en/publications/1e0e823d-ad52-4d2e-828a-fad6893c432f https://doi.org/10.1017/S095410209600034X https://hdl.handle.net/20.500.11755/1e0e823d-ad52-4d2e-828a-fad6893c432f https://pure.knaw.nl/ws/files/479208/Brouwer_2156.pdf |
id |
ftknawnlpublic:oai:pure.knaw.nl:publications/1e0e823d-ad52-4d2e-828a-fad6893c432f |
---|---|
record_format |
openpolar |
spelling |
ftknawnlpublic:oai:pure.knaw.nl:publications/1e0e823d-ad52-4d2e-828a-fad6893c432f 2024-09-15T17:41:52+00:00 In situ photosynthesis and estimated annual production of the red macroalga Myriogramme mangini in relation to underwater irradiance at Signy island (Antarctica) Brouwer, P.E.M. 1996 application/pdf https://pure.knaw.nl/portal/en/publications/1e0e823d-ad52-4d2e-828a-fad6893c432f https://doi.org/10.1017/S095410209600034X https://hdl.handle.net/20.500.11755/1e0e823d-ad52-4d2e-828a-fad6893c432f https://pure.knaw.nl/ws/files/479208/Brouwer_2156.pdf eng eng https://pure.knaw.nl/portal/en/publications/1e0e823d-ad52-4d2e-828a-fad6893c432f info:eu-repo/semantics/openAccess Brouwer , P E M 1996 , ' In situ photosynthesis and estimated annual production of the red macroalga Myriogramme mangini in relation to underwater irradiance at Signy island (Antarctica) ' , Antarctic Science , vol. 8 , no. 3 , pp. 245-252 . https://doi.org/10.1017/S095410209600034X article 1996 ftknawnlpublic https://doi.org/10.1017/S095410209600034X20.500.11755/1e0e823d-ad52-4d2e-828a-fad6893c432f 2024-07-22T23:43:54Z For the first time, photosynthesis of Myriogramme mangini (Gain) Skottsberg, one of the dominant red macroalgae in the sublittoral of Signy Island (South Orkney Islands), was studied in situ under natural irradiance levels in specially developed incubation chambers. M. mangini is adapted to low irradiance levels. Water transparency varied over the year. A maximum attenuation coefficient (k(d)) of 0.328 m(-1) was reached in January, and the water was dearest in September with a k(d) value of 0.079 m(-1). Classification of the water type on a Jerlov scale, gave water type 4 in January and II in May and June. The mean k(d) value over the year was 0.158 m(-1) and the water was classified as Jerlov's water type 1. The euphotic depths (Z(eu)) for 1%, 0.1% and 0.01% surface irradiance levels were 29.1 m, 43.7 m and 58.3 m, respectively. Photosynthetic characteristics were determined, with the oxygen production rates and irradiance levels measured in situ, using P-I curves. The initial saturation irradiance (I-k) varied significantly from 18.0 +/- 1.5 mu mol m(-2) s(-1) in autumn to 10.5 +/- 1.8 mu mol m(-2) s(-1) in early spring. Mean photosynthetic capacity (P-g max) ranged from 57.2 +/- 1.3 mu mol O-2 g(-1)DW h(-1) to 63.1 +/- 1.6 mu mol O-2 g(-1)DW h(-1). The photosynthetic efficiency (alpha) was 3.2 +/- 0.2 mu mol O-2 g(-1)DW h(-1) (mu mol m(-2) s(-1))(-1) in autumn and 6.0 +/- 1.0 mu mol O-2 g(-1)DW h(-1) (mu mol m(-2) s(-1))(-1) in early spring. Compensation irradiance (I-c) was low and ranged from 2.5 to 2.8 mu mol m(-2) s(-1). Estimates of annual net production rates were 128.1 and 0.6 mmol O-2 g(-1)DW y(-1) at 5 m depth and 20 m depth, respectively. A maximum depth of occurrence of M. mangini was predicted at 22.9 m (2.7% of the surface irradiance). [KEYWORDS: annual production; irradiance; k(d); light penetration; macroalgae; photosynthesis; Rhodophyta King-george-island; long-term culture; south-shetland; sea ice; light; respiration; temperature; seasonality; phaeophyta; daylengths] For the first time, ... Article in Journal/Newspaper Antarc* Antarctic Science Antarctica King George Island Sea ice Signy Island South Orkney Islands Royal Netherlands Academy of Arts and Sciences Research Portal (KNAW) Antarctic Science 8 3 245 252 |
institution |
Open Polar |
collection |
Royal Netherlands Academy of Arts and Sciences Research Portal (KNAW) |
op_collection_id |
ftknawnlpublic |
language |
English |
description |
For the first time, photosynthesis of Myriogramme mangini (Gain) Skottsberg, one of the dominant red macroalgae in the sublittoral of Signy Island (South Orkney Islands), was studied in situ under natural irradiance levels in specially developed incubation chambers. M. mangini is adapted to low irradiance levels. Water transparency varied over the year. A maximum attenuation coefficient (k(d)) of 0.328 m(-1) was reached in January, and the water was dearest in September with a k(d) value of 0.079 m(-1). Classification of the water type on a Jerlov scale, gave water type 4 in January and II in May and June. The mean k(d) value over the year was 0.158 m(-1) and the water was classified as Jerlov's water type 1. The euphotic depths (Z(eu)) for 1%, 0.1% and 0.01% surface irradiance levels were 29.1 m, 43.7 m and 58.3 m, respectively. Photosynthetic characteristics were determined, with the oxygen production rates and irradiance levels measured in situ, using P-I curves. The initial saturation irradiance (I-k) varied significantly from 18.0 +/- 1.5 mu mol m(-2) s(-1) in autumn to 10.5 +/- 1.8 mu mol m(-2) s(-1) in early spring. Mean photosynthetic capacity (P-g max) ranged from 57.2 +/- 1.3 mu mol O-2 g(-1)DW h(-1) to 63.1 +/- 1.6 mu mol O-2 g(-1)DW h(-1). The photosynthetic efficiency (alpha) was 3.2 +/- 0.2 mu mol O-2 g(-1)DW h(-1) (mu mol m(-2) s(-1))(-1) in autumn and 6.0 +/- 1.0 mu mol O-2 g(-1)DW h(-1) (mu mol m(-2) s(-1))(-1) in early spring. Compensation irradiance (I-c) was low and ranged from 2.5 to 2.8 mu mol m(-2) s(-1). Estimates of annual net production rates were 128.1 and 0.6 mmol O-2 g(-1)DW y(-1) at 5 m depth and 20 m depth, respectively. A maximum depth of occurrence of M. mangini was predicted at 22.9 m (2.7% of the surface irradiance). [KEYWORDS: annual production; irradiance; k(d); light penetration; macroalgae; photosynthesis; Rhodophyta King-george-island; long-term culture; south-shetland; sea ice; light; respiration; temperature; seasonality; phaeophyta; daylengths] For the first time, ... |
format |
Article in Journal/Newspaper |
author |
Brouwer, P.E.M. |
spellingShingle |
Brouwer, P.E.M. In situ photosynthesis and estimated annual production of the red macroalga Myriogramme mangini in relation to underwater irradiance at Signy island (Antarctica) |
author_facet |
Brouwer, P.E.M. |
author_sort |
Brouwer, P.E.M. |
title |
In situ photosynthesis and estimated annual production of the red macroalga Myriogramme mangini in relation to underwater irradiance at Signy island (Antarctica) |
title_short |
In situ photosynthesis and estimated annual production of the red macroalga Myriogramme mangini in relation to underwater irradiance at Signy island (Antarctica) |
title_full |
In situ photosynthesis and estimated annual production of the red macroalga Myriogramme mangini in relation to underwater irradiance at Signy island (Antarctica) |
title_fullStr |
In situ photosynthesis and estimated annual production of the red macroalga Myriogramme mangini in relation to underwater irradiance at Signy island (Antarctica) |
title_full_unstemmed |
In situ photosynthesis and estimated annual production of the red macroalga Myriogramme mangini in relation to underwater irradiance at Signy island (Antarctica) |
title_sort |
in situ photosynthesis and estimated annual production of the red macroalga myriogramme mangini in relation to underwater irradiance at signy island (antarctica) |
publishDate |
1996 |
url |
https://pure.knaw.nl/portal/en/publications/1e0e823d-ad52-4d2e-828a-fad6893c432f https://doi.org/10.1017/S095410209600034X https://hdl.handle.net/20.500.11755/1e0e823d-ad52-4d2e-828a-fad6893c432f https://pure.knaw.nl/ws/files/479208/Brouwer_2156.pdf |
genre |
Antarc* Antarctic Science Antarctica King George Island Sea ice Signy Island South Orkney Islands |
genre_facet |
Antarc* Antarctic Science Antarctica King George Island Sea ice Signy Island South Orkney Islands |
op_source |
Brouwer , P E M 1996 , ' In situ photosynthesis and estimated annual production of the red macroalga Myriogramme mangini in relation to underwater irradiance at Signy island (Antarctica) ' , Antarctic Science , vol. 8 , no. 3 , pp. 245-252 . https://doi.org/10.1017/S095410209600034X |
op_relation |
https://pure.knaw.nl/portal/en/publications/1e0e823d-ad52-4d2e-828a-fad6893c432f |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1017/S095410209600034X20.500.11755/1e0e823d-ad52-4d2e-828a-fad6893c432f |
container_title |
Antarctic Science |
container_volume |
8 |
container_issue |
3 |
container_start_page |
245 |
op_container_end_page |
252 |
_version_ |
1810488154430373888 |