Adjustment of photoprotection to tidal conditions in intertidal seagrasses
Copyright © Marine Biological Association of the United Kingdom 2016Light adaptive strategies were studied in a comparative analysis of the congeneric seagrass species Zostera muelleri and Zostera marina at two case study areas in New Zealand and Germany. Surveys in intertidal seagrass meadows were...
| Main Authors: | , , , |
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| Format: | Journal Article |
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Marine Biological Association of the United Kingdom
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/51864 |
| _version_ | 1848758792645246976 |
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| author | Kohlmeier, D. Pilditch, C. Bornman, Janet Bischof, K. |
| author_facet | Kohlmeier, D. Pilditch, C. Bornman, Janet Bischof, K. |
| author_sort | Kohlmeier, D. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Copyright © Marine Biological Association of the United Kingdom 2016Light adaptive strategies were studied in a comparative analysis of the congeneric seagrass species Zostera muelleri and Zostera marina at two case study areas in New Zealand and Germany. Surveys in intertidal seagrass meadows were conducted from pre-dawn until sunset on days when either low or high tide coincided with noon. The results show marked fluctuations of photophysiology (optimum and effective quantum yield, non-photochemical quenching, cycling of xanthophyll cycle (XC) pigments) over daily and tidal cycles. At both locations, we observed a near complete conversion (de-epoxidation) of violaxanthin to zeaxanthin at times with high irradiance and a rapid and complete re-epoxidation under subsequent lower light conditions. At the New Zealand site we also observed significantly larger XC-pigment pool sizes in seagrass leaves sampled in a week when low tide coincided with noon (larger daily fluence and higher maximum irradiance), compared with leaves sampled in a week when high tide was at noon. This dynamic adjustment of xanthophyll pool size has not been previously reported for intertidal seagrasses. It adds to our understanding of an important adaptive feature in a highly dynamic light environment and to the general ecology and adaptability of seagrasses. |
| first_indexed | 2025-11-14T09:49:37Z |
| format | Journal Article |
| id | curtin-20.500.11937-51864 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:49:37Z |
| publishDate | 2016 |
| publisher | Marine Biological Association of the United Kingdom |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-518642017-09-13T15:36:42Z Adjustment of photoprotection to tidal conditions in intertidal seagrasses Kohlmeier, D. Pilditch, C. Bornman, Janet Bischof, K. Copyright © Marine Biological Association of the United Kingdom 2016Light adaptive strategies were studied in a comparative analysis of the congeneric seagrass species Zostera muelleri and Zostera marina at two case study areas in New Zealand and Germany. Surveys in intertidal seagrass meadows were conducted from pre-dawn until sunset on days when either low or high tide coincided with noon. The results show marked fluctuations of photophysiology (optimum and effective quantum yield, non-photochemical quenching, cycling of xanthophyll cycle (XC) pigments) over daily and tidal cycles. At both locations, we observed a near complete conversion (de-epoxidation) of violaxanthin to zeaxanthin at times with high irradiance and a rapid and complete re-epoxidation under subsequent lower light conditions. At the New Zealand site we also observed significantly larger XC-pigment pool sizes in seagrass leaves sampled in a week when low tide coincided with noon (larger daily fluence and higher maximum irradiance), compared with leaves sampled in a week when high tide was at noon. This dynamic adjustment of xanthophyll pool size has not been previously reported for intertidal seagrasses. It adds to our understanding of an important adaptive feature in a highly dynamic light environment and to the general ecology and adaptability of seagrasses. 2016 Journal Article http://hdl.handle.net/20.500.11937/51864 10.1017/S0025315416001090 Marine Biological Association of the United Kingdom restricted |
| spellingShingle | Kohlmeier, D. Pilditch, C. Bornman, Janet Bischof, K. Adjustment of photoprotection to tidal conditions in intertidal seagrasses |
| title | Adjustment of photoprotection to tidal conditions in intertidal seagrasses |
| title_full | Adjustment of photoprotection to tidal conditions in intertidal seagrasses |
| title_fullStr | Adjustment of photoprotection to tidal conditions in intertidal seagrasses |
| title_full_unstemmed | Adjustment of photoprotection to tidal conditions in intertidal seagrasses |
| title_short | Adjustment of photoprotection to tidal conditions in intertidal seagrasses |
| title_sort | adjustment of photoprotection to tidal conditions in intertidal seagrasses |
| url | http://hdl.handle.net/20.500.11937/51864 |