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Within these forests, species such as\n                    <jats:italic>Laminaria hyperborea<\/jats:italic>\n                    and\n                    <jats:italic>Saccharina latissima<\/jats:italic>\n                    occupy distinct depth ranges, yet the physiological mechanisms underlying this zonation remain unclear. We compared their responses to temperature and light to test whether adult ecophysiology contributes to their vertical distribution and may also influence their latitudinal range limits. Both species displayed high tolerance to short\u2010term thermal stress, maintaining positive net photosynthesis up to 30\u00b0C.\n                    <jats:italic>Saccharina latissima<\/jats:italic>\n                    showed moderate reductions in photosynthetic efficiency and productivity at this temperature, whereas\n                    <jats:italic>L.\u2009hyperborea<\/jats:italic>\n                    remained largely unaffected. Both species exhibited low light requirements, consistent with their persistence in deeper habitats. These results suggest that adult thermal and light tolerance alone do not constrain current distributions. However, processes acting at other life stages, such as reproduction, recruitment, habitat availability and other ecological drivers, are likely more influential in setting biogeographical and vertical range limits. These insights suggest that future changes in species dominance and community composition in southern kelp forests will be driven by shifts in ecological interactions and life\u2010cycle dynamics, rather than by direct physiological constraints.\n                  <\/jats:p>","DOI":"10.1111\/jpy.70216","type":"journal-article","created":{"date-parts":[[2026,7,31]],"date-time":"2026-07-31T08:22:05Z","timestamp":1785486125000},"page":"1645-1655","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Ecophysiological responses of boreal\u2010temperate Atlantic kelp at their equatorial range limit"],"prefix":"10.1111","volume":"62","author":[{"ORCID":"https:\/\/orcid.org\/0009-0003-3112-3302","authenticated-orcid":false,"given":"Tom\u00e1s F.","family":"Pinheiro","sequence":"first","affiliation":[{"name":"CIIMAR\/CIMAR LA, Interdisciplinary Centre of Marine and Environmental Research University of Porto  Matosinhos Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6151-891X","authenticated-orcid":false,"given":"Silvia","family":"Chemello","sequence":"additional","affiliation":[{"name":"CIIMAR\/CIMAR LA, Interdisciplinary Centre of Marine and Environmental Research University of Porto  Matosinhos Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Isabel","family":"Sousa\u2010Pinto","sequence":"additional","affiliation":[{"name":"CIIMAR\/CIMAR LA, Interdisciplinary Centre of Marine and Environmental Research University of Porto  Matosinhos Portugal"},{"name":"Department of Biology, Faculty of Sciences University of Porto  Porto Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"T\u00e2nia R.","family":"Pereira","sequence":"additional","affiliation":[{"name":"CIIMAR\/CIMAR LA, Interdisciplinary Centre of Marine and Environmental Research University of Porto  Matosinhos Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,7,31]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10531\u2010016\u20101141\u20107"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.actao.2006.04.002"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.4490\/algae.2019.34.5.12"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.aquaculture.2016.03.038"},{"key":"e_1_2_10_6_1","doi-asserted-by":"publisher","DOI":"10.1111\/jpy.12125"},{"key":"e_1_2_10_7_1","doi-asserted-by":"publisher","DOI":"10.1111\/jpy.13332"},{"key":"e_1_2_10_8_1","doi-asserted-by":"publisher","DOI":"10.3389\/fmars.2021.714462"},{"key":"e_1_2_10_9_1","doi-asserted-by":"publisher","DOI":"10.1080\/17451000.2014.943239"},{"key":"e_1_2_10_10_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF00397259"},{"key":"e_1_2_10_11_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10531\u2010019\u201001716\u20109"},{"key":"e_1_2_10_12_1","first-page":"63","article-title":"El alga marina Macrocystis pyrifera como sumplemento alimenticio para cabras","volume":"19","author":"Castro N. 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