Effects of temperature and salinity on the reproductive phases of Macrocystis pyrifera (L.) C. Agardh (Phaeophyceae) in the Magellan region

Toward a conceptual framework for managing and conserving marine habitats: A case study of kelp forests in the Salish Sea

“…Similar patterns of reduced growth and health under reduced salinity conditions have been documented elsewhere in the distribution of M . pyrifera (Rodríguez et al, 2019 ). While only one identified study looked directly at the impacts of salinity on kelps in the Salish Sea, similar negative impacts of hyposalinity (i.e., reduced salinity relative to ambient) have been documented in other temperate systems on some species also found in the Salish Sea, such as Saccharina latissima and Nereocystis luetkeana .…”

“…While only one identified study looked directly at the impacts of salinity on kelps in the Salish Sea, similar negative impacts of hyposalinity (i.e., reduced salinity relative to ambient) have been documented in other temperate systems on some species also found in the Salish Sea, such as Saccharina latissima and Nereocystis luetkeana . Under experimental settings, reduced salinity can lower growth rates (Li et al, 2020 ), cause blistering or bleaching (Vettori et al, 2020 ), induce a physiological stress response (Bollen et al, 2016 ; Li et al, 2020 ; Monteiro et al, 2019 ; Mortensen, 2017 ), and limit recruitment (Rodríguez et al, 2019 ). This has been documented in multiple species of both canopy (e.g., Macrocystis pyrifera ) and understory kelps (e.g., Saccharina latissima , Laminaria spp.).…”

New ecophysiological perspectives on the kelp Macrocystis pyrifera: generating a basis for sustainability in the sub-Antarctic region

“…The sporophylls of M. pyrifera were stored in a cooler in the dark, with seawater at low temperature (<10°C), and were transported to the laboratory on the same day of collection, following the methodology of Rodrıǵuez et al (2019). The area of coverage and position of the sporangial sorus of the collected sporophylls was calculated by digital photography, using Acrobat Reader DC Version 2015 software.…”

“…Furthermore, this region is vulnerable to climate change (Mansilla et al, 2012;Wernberg et al, 2018;Qiu et al, 2019), as is M. pyrifera (Mansilla et al, 2012) kelp forest. Climate change and the environmental variations it causes directly affect M. pyrifera populations, mainly in its life cycle, photosynthetic capacity, external morphology, population structure, and size (Rıós et al, 2007;Marambio et al, 2017;Rodrıǵuez et al, 2019), with direct implications for the sustainability of southern marine ecosystems (Hollarsmith et al, 2020;Davis et al, 2022. ) The kelp forest of M. pyrifera that inhabit the Magellan ecoregion have been studied extensively, including work on ecology (Adami and Gordillo, 1999;Mansilla et al, 2005;Plana et al, 2007;Rıós et al, 2007;Rosenfeld et al, 2014;Friedlander et al, 2023), bioactive compounds such as carotenoids and polyphenols (Mansilla and A ́vila, 2011;Mansilla et al, 2012;Astorga-España and Mansilla, 2014), remote sensing (Mora-Soto et al, 2020;Mora-Soto et al, 2021), and reproduction (Palacios and Mansilla, 2003;Rodrıǵuez et al, 2019;Camus et al, 2021).…”

“…Therefore, the Magellanic populations would have been strongly affected by historical events such as the Last Glacial Maximum (LGM) (Macaya and Zuccarello, 2010). On the other hand, studies in ecophysiology have shown how M. pyrifera populations have physiological traits that allow them to respond to different scenarios it has also been observed that there are populations that have unique traits that allow them to survive certain environmental conditions (Marambio et al, 2017;Rodrıǵuez et al, 2019;Ziemann dos Santos et al, 2019;Palacios et al, 2021). However, these studies have been focused on populations that inhabit a specific area of the MSE.…”