{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,30]],"date-time":"2026-04-30T07:01:26Z","timestamp":1777532486033,"version":"3.51.4"},"reference-count":75,"publisher":"Inter-Research Science Center","license":[{"start":{"date-parts":[[2022,2,3]],"date-time":"2022-02-03T00:00:00Z","timestamp":1643846400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.int-res.com\/journals\/terms-of-use\/"}],"content-domain":{"domain":["int-res.com"],"crossmark-restriction":false},"short-container-title":["Mar. Ecol. Prog. Ser."],"published-print":{"date-parts":[[2022,2,3]]},"abstract":"<jats:p>Many organisms have endogenous clocks that synchronize biological processes with environmental changes, leading to optimized development and reproduction. However, certain environments, like the Arctic, pose a special challenge to circadian clocks, particularly due to extreme seasonal changes in daylength, ranging from permanent sunlight to complete darkness. Kelps seem to be well adapted to the variable environmental conditions characteristic of this region. However, daylength might affect kelp species that use circadian rhythms to control the timing of daily egg release from female gametophytes. We aimed to investigate how daylength and light intensity affect gametogenesis and reproductive success of summer-reproducing kelp species (using <jats:italic>Alaria esculenta<\/jats:italic> as a model). As daylength and temperature co-vary most of the year, we also investigated the thermal resilience of the sporophytes developed under different daylengths to understand if there is a cross-tolerance between light doses and temperature tolerance. Although continuous daylight, characteristic of Arctic summers, enhanced gametogenesis and increased gametophyte vegetative growth, and thereby the number of potential reproductive gametophyte cells, sporophyte production was higher under long (16 h light:8 h dark) and intermediate (12:12 h) days. Sporophyte growth was triggered by changing daylength from short to long days, suggesting a synchronization with annual daylength variation. High daily light doses during reproduction and early development improved subsequent sporophyte survival at high (sub)lethal temperatures, indicating cross-tolerance between light and temperature. Reproductive success in Arctic <jats:italic>A. esculenta<\/jats:italic> was hampered under continuous light, and we hypothesize that this might result from disturbance of synchronized egg release and subsequent fertilization.<\/jats:p>","DOI":"10.3354\/meps13950","type":"journal-article","created":{"date-parts":[[2021,11,15]],"date-time":"2021-11-15T11:30:06Z","timestamp":1636975806000},"page":"37-52","update-policy":"https:\/\/doi.org\/10.3354\/policy","source":"Crossref","is-referenced-by-count":17,"title":["Daylength influences reproductive success and sporophyte growth in the Arctic kelp species Alaria esculenta"],"prefix":"10.3354","volume":"683","author":[{"given":"N","family":"Martins","sequence":"first","affiliation":[{"name":"Centre of Marine Sciences (CCMAR), CIMAR, University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal"}]},{"given":"L","family":"Barreto","sequence":"additional","affiliation":[{"name":"Centre of Marine Sciences (CCMAR), CIMAR, University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal"}]},{"given":"I","family":"Bartsch","sequence":"additional","affiliation":[{"name":"Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research, Am Handelshafen 12, 27570 Bremerhaven, Germany"}]},{"given":"J","family":"Bernard","sequence":"additional","affiliation":[{"name":"Centre of Marine Sciences (CCMAR), CIMAR, University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal"}]},{"given":"EA","family":"Serr\u00e3o","sequence":"additional","affiliation":[{"name":"Centre of Marine Sciences (CCMAR), CIMAR, University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal"}]},{"given":"GA","family":"Pearson","sequence":"additional","affiliation":[{"name":"Centre of Marine Sciences (CCMAR), CIMAR, University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal"}]}],"member":"1913","reference":[{"key":"Ref1","doi-asserted-by":"crossref","unstructured":"Anderson MJ (2001) A new method for non-parametric multivariate analysis of variance. Austral Ecol 26:32-46","DOI":"10.1046\/j.1442-9993.2001.01070.x"},{"key":"Ref2","doi-asserted-by":"publisher","DOI":"10.1080\/09670269600651601"},{"key":"Ref3","doi-asserted-by":"publisher","DOI":"10.1111\/gcb.13818"},{"key":"Ref4","doi-asserted-by":"crossref","unstructured":"Bartsch I (2018) Derivation of clonal stock cultures and hybridization of kelps. In: Charrier B, Wichard T, Reddy C (eds) Protocols for macroalgae research. CRC Press, Boca Raton, FL, p 61-78","DOI":"10.1201\/b21460-3"},{"key":"Ref5","doi-asserted-by":"publisher","DOI":"10.1080\/09670260701711376"},{"key":"Ref6","doi-asserted-by":"publisher","DOI":"10.1016\/j.scienta.2017.12.006"},{"key":"Ref7","doi-asserted-by":"publisher","DOI":"10.1111\/j.1469-8137.2010.03357.x"},{"key":"Ref8","doi-asserted-by":"publisher","DOI":"10.1111\/j.1751-1097.1993.tb04915.x"},{"key":"Ref9","doi-asserted-by":"publisher","DOI":"10.2216\/i0031-8884-9-1-103.1"},{"key":"Ref10","doi-asserted-by":"publisher","DOI":"10.1007\/s10811-005-0432-2"},{"key":"Ref11","doi-asserted-by":"publisher","DOI":"10.1111\/jpy.13043"},{"key":"Ref12","doi-asserted-by":"publisher","DOI":"10.3389\/fmars.2020.00567"},{"key":"Ref13","doi-asserted-by":"publisher","DOI":"10.1111\/j.1529-8817.2009.00752.x"},{"key":"Ref14","doi-asserted-by":"publisher","DOI":"10.1007\/s00300-020-02668-5"},{"key":"Ref15","doi-asserted-by":"publisher","DOI":"10.1126\/science.1115581"},{"key":"Ref16","unstructured":"Dring MJ (1984) Photoperiodism and phycology. Prog Phycol Res 8:159-162"},{"key":"Ref17","doi-asserted-by":"publisher","DOI":"10.1111\/j.1529-8817.2005.04143.x"},{"key":"Ref18","unstructured":"Duarte A (2017) Optimization of seedling production using vegetative gametophytes of Alaria esculenta. MSc thesis, University of Porto"},{"key":"Ref19","doi-asserted-by":"publisher","DOI":"10.1890\/0012-9658(2000)081[2404:TROALH]2.0.CO;2"},{"key":"Ref20","doi-asserted-by":"publisher","DOI":"10.1111\/j.1558-5646.2008.00324.x"},{"key":"Ref21","doi-asserted-by":"publisher","DOI":"10.1038\/s41598-021-82094-7"},{"key":"Ref22","doi-asserted-by":"publisher","DOI":"10.1016\/j.gloplacha.2018.09.005"},{"key":"Ref23","doi-asserted-by":"publisher","DOI":"10.1007\/s00442-009-1326-9"},{"key":"Ref24","doi-asserted-by":"publisher","DOI":"10.1038\/nrg3976"},{"key":"Ref25","doi-asserted-by":"publisher","DOI":"10.3354\/meps12696"},{"key":"Ref26","doi-asserted-by":"publisher","DOI":"10.1080\/09670269600651431"},{"key":"Ref27","doi-asserted-by":"publisher","DOI":"10.1007\/s002270000481"},{"key":"Ref28","doi-asserted-by":"publisher","DOI":"10.1016\/j.tree.2020.04.011"},{"key":"Ref29","doi-asserted-by":"publisher","DOI":"10.3389\/fmars.2021.658485"},{"key":"Ref30","doi-asserted-by":"publisher","DOI":"10.1080\/00071618900650221"},{"key":"Ref31","doi-asserted-by":"publisher","DOI":"10.1111\/j.1529-8817.1978.tb00626.x"},{"key":"Ref32","doi-asserted-by":"publisher","DOI":"10.1007\/s10811-020-02222-0"},{"key":"Ref33","doi-asserted-by":"publisher","DOI":"10.1080\/09670260110001735178"},{"key":"Ref34","doi-asserted-by":"publisher","DOI":"10.1111\/j.0022-3646.1993.00363.x"},{"key":"Ref35","doi-asserted-by":"publisher","DOI":"10.1007\/s00343-013-2207-y"},{"key":"Ref36","doi-asserted-by":"publisher","DOI":"10.1186\/s13059-017-1201-7"},{"key":"Ref37","doi-asserted-by":"publisher","DOI":"10.1080\/00071618100650441"},{"key":"Ref38","doi-asserted-by":"publisher","DOI":"10.3354\/meps045137"},{"key":"Ref39","unstructured":"L\u00fcning K (1990) Seaweeds: their environment, biogeography and ecophysiology. John Wiley and Sons, New York, NY"},{"key":"Ref40","doi-asserted-by":"publisher","DOI":"10.1007\/BF00391846"},{"key":"Ref41","doi-asserted-by":"crossref","unstructured":"L\u00fcning K, M\u00fcller DG (1978) Chemical interaction in sexual reproduction of several Laminariales (Phaeophyceae) release and attraction of spermatozoids. Z Pflanzenphysiol 89:333-341","DOI":"10.1016\/S0044-328X(78)80006-3"},{"key":"Ref42","doi-asserted-by":"publisher","DOI":"10.1515\/BOT.1999.007"},{"key":"Ref43","doi-asserted-by":"publisher","DOI":"10.1515\/bot-2016-0094"},{"key":"Ref44","doi-asserted-by":"publisher","DOI":"10.1890\/0012-9658(2001)082[0290:FMMTCD]2.0.CO;2"},{"key":"Ref45","doi-asserted-by":"publisher","DOI":"10.1007\/s00227-012-2068-5"},{"key":"Ref46","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0203666"},{"key":"Ref47","doi-asserted-by":"publisher","DOI":"10.1038\/279430a0"},{"key":"Ref48","doi-asserted-by":"publisher","DOI":"10.3354\/cr00762"},{"key":"Ref49","doi-asserted-by":"publisher","DOI":"10.1007\/BF01614267"},{"key":"Ref50","doi-asserted-by":"publisher","DOI":"10.1007\/s00300-013-1325-5"},{"key":"Ref51","doi-asserted-by":"publisher","DOI":"10.1111\/j.1529-8817.2007.00408.x"},{"key":"Ref52","doi-asserted-by":"crossref","unstructured":"Papageorgiou GC, Govindjee A (2004) Chlorophyll a fluorescence: a signature of photosynthesis. Springer, Dordrecht, p 447-461","DOI":"10.1007\/978-1-4020-3218-9"},{"key":"Ref53","doi-asserted-by":"publisher","DOI":"10.1104\/pp.17.00361"},{"key":"Ref54","unstructured":"Provasoli L (1968) Media and prospects for the cultivation of marine algae. In: Watanabe A, Hattori A (eds) Cultures and collections of algae. Proc US-Japan Conference, Hakone, 12-15 September 1966. Japanese Society of Plant Physiology, Tokyo, p 63-75"},{"key":"Ref55","doi-asserted-by":"publisher","DOI":"10.1177\/074873099129000731"},{"key":"Ref56","doi-asserted-by":"publisher","DOI":"10.1093\/conphys\/coab037"},{"key":"Ref57","doi-asserted-by":"publisher","DOI":"10.1038\/nrm1766"},{"key":"Ref58","doi-asserted-by":"publisher","DOI":"10.1007\/s00300-004-0713-2"},{"key":"Ref59","doi-asserted-by":"publisher","DOI":"10.1111\/ddi.12474"},{"key":"Ref60","doi-asserted-by":"publisher","DOI":"10.1038\/nclimate1430"},{"key":"Ref61","doi-asserted-by":"publisher","DOI":"10.1038\/nmeth.2089"},{"key":"Ref62","doi-asserted-by":"publisher","DOI":"10.1111\/pre.12014"},{"key":"Ref63","doi-asserted-by":"publisher","DOI":"10.2216\/16-122.1"},{"key":"Ref64","doi-asserted-by":"publisher","DOI":"10.1046\/j.1529-8817.2001.01094.x"},{"key":"Ref65","doi-asserted-by":"publisher","DOI":"10.1080\/00071618000650301"},{"key":"Ref66","doi-asserted-by":"publisher","DOI":"10.2216\/i0031-8884-31-2-147.1"},{"key":"Ref67","doi-asserted-by":"publisher","DOI":"10.1007\/BF00349397"},{"key":"Ref68","doi-asserted-by":"publisher","DOI":"10.1038\/4381095a"},{"key":"Ref69","doi-asserted-by":"publisher","DOI":"10.1016\/j.scienta.2013.05.036"},{"key":"Ref70","doi-asserted-by":"crossref","unstructured":"Vince-Prue D (1986) The duration of light and photoperiodic responses. In: Kendrick RE, Kronenberg GHM (eds) Photomorphogenesis in plants. Springer, Dordrecht, p 269-305","DOI":"10.1007\/978-94-017-2624-5_13"},{"key":"Ref71","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365-2486.2012.02656.x"},{"key":"Ref72","doi-asserted-by":"publisher","DOI":"10.1007\/s11157-006-9106-z"},{"key":"Ref73","doi-asserted-by":"publisher","DOI":"10.1007\/s42398-020-00156-4"},{"key":"Ref74","doi-asserted-by":"publisher","DOI":"10.1007\/s00300-016-1906-1"},{"key":"Ref75","unstructured":"Zhang Z, Pang S (2007) Circadian rhythms in the growth and reproduction of the brown alga Undaria pinnatifida and gametogenesis under different photoperiods. Acta Oceanol Sin 26:104-111"}],"container-title":["Marine Ecology Progress Series"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.int-res.com\/articles\/meps2022\/683\/m683p037.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.int-res.com\/articles\/meps2022\/683\/m683p037.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2022,2,3]],"date-time":"2022-02-03T15:50:53Z","timestamp":1643903453000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.int-res.com\/abstracts\/meps\/v683\/p37-52\/"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,2,3]]},"references-count":75,"URL":"https:\/\/doi.org\/10.3354\/meps13950","relation":{},"ISSN":["0171-8630","1616-1599"],"issn-type":[{"value":"0171-8630","type":"print"},{"value":"1616-1599","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,2,3]]}}}