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Article: arrow range of temperature and irradiance supports optimal development of Lessonia corrugata (Orchrophyta, Phaeophyceae, Laminariales) gametophytes: implications for kelp aquaculture and climate change

Titlearrow range of temperature and irradiance supports optimal development of Lessonia corrugata (Orchrophyta, Phaeophyceae, Laminariales) gametophytes: implications for kelp aquaculture and climate change
Authors
Issue Date2021
PublisherSpringer International Publishing. The Journal's web site is located at http://springerlink.metapress.com/openurl.asp?genre=journal&issn=0921-8971
Citation
Journal of Applied Phycology, 2021, v. 33, p. 1721–1730 How to Cite?
AbstractThe kelp Lessonia corrugata (Ochrophyta, Laminariales) is being developed for integrated multi-trophic aquaculture (IMTA) trials in the vicinity of salmon cages in Tasmania, Australia. Gametophytes are vegetally maintained before seeding on hatchery twine; however, the optimal temperature and light conditions for growth and sexual development are unknown. We measured vegetative size of female and male gametophytes and sexual development of females over a range of temperatures and irradiances using a temperature gradient table and neutral density light filters. Over a 4-week experiment, gametophytes were exposed to a combination of thermal (5.7–24.9 °C) and irradiance (10–100 μmol photons m−2 s−1) gradients, to assess biological performance. At the temperature extremes (hottest = 24.9 °C, coldest = 5.7 °C), we observed the critical thermal limits for this species and the results reveal a narrow optimal temperature range for growth and sexual development between 15.7 and 17.9 °C, with irradiances between 40 and 100 μmol photons m−2 s−1 resulting in fertile female gametophytes. Lessonia corrugata inhabits a small geographic range, found only around Tasmania, south of the Australian mainland, hence oceanic changes such as ongoing increases in sea surface temperatures (SSTs), and altered irradiance regimes may limit recruitment of the early microscopic life stages in the future. Our findings provide optimised culture conditions for aquaculture and information to predict the future geographic range of L. corrugata under ocean global change.
Persistent Identifierhttp://hdl.handle.net/10722/304394

 

DC FieldValueLanguage
dc.contributor.authorPain, E-
dc.contributor.authorSchmid, M-
dc.contributor.authorGaitan Espitia, JD-
dc.contributor.authorCastle, J-
dc.contributor.authorJameson, I-
dc.contributor.authorSanderson, J-
dc.contributor.authorHurd, C-
dc.date.accessioned2021-09-23T08:59:25Z-
dc.date.available2021-09-23T08:59:25Z-
dc.date.issued2021-
dc.identifier.citationJournal of Applied Phycology, 2021, v. 33, p. 1721–1730-
dc.identifier.urihttp://hdl.handle.net/10722/304394-
dc.description.abstractThe kelp Lessonia corrugata (Ochrophyta, Laminariales) is being developed for integrated multi-trophic aquaculture (IMTA) trials in the vicinity of salmon cages in Tasmania, Australia. Gametophytes are vegetally maintained before seeding on hatchery twine; however, the optimal temperature and light conditions for growth and sexual development are unknown. We measured vegetative size of female and male gametophytes and sexual development of females over a range of temperatures and irradiances using a temperature gradient table and neutral density light filters. Over a 4-week experiment, gametophytes were exposed to a combination of thermal (5.7–24.9 °C) and irradiance (10–100 μmol photons m−2 s−1) gradients, to assess biological performance. At the temperature extremes (hottest = 24.9 °C, coldest = 5.7 °C), we observed the critical thermal limits for this species and the results reveal a narrow optimal temperature range for growth and sexual development between 15.7 and 17.9 °C, with irradiances between 40 and 100 μmol photons m−2 s−1 resulting in fertile female gametophytes. Lessonia corrugata inhabits a small geographic range, found only around Tasmania, south of the Australian mainland, hence oceanic changes such as ongoing increases in sea surface temperatures (SSTs), and altered irradiance regimes may limit recruitment of the early microscopic life stages in the future. Our findings provide optimised culture conditions for aquaculture and information to predict the future geographic range of L. corrugata under ocean global change.-
dc.languageeng-
dc.publisherSpringer International Publishing. The Journal's web site is located at http://springerlink.metapress.com/openurl.asp?genre=journal&issn=0921-8971-
dc.relation.ispartofJournal of Applied Phycology-
dc.titlearrow range of temperature and irradiance supports optimal development of Lessonia corrugata (Orchrophyta, Phaeophyceae, Laminariales) gametophytes: implications for kelp aquaculture and climate change-
dc.typeArticle-
dc.identifier.emailGaitan Espitia, JD: jdgaitan@hku.hk-
dc.identifier.authorityGaitan Espitia, JD=rp02384-
dc.identifier.doi10.1007/s10811-021-02382-7-
dc.identifier.hkuros325481-
dc.identifier.volume33-
dc.identifier.spage1721–1730-
dc.identifier.epage1721–1730-

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