Superior photosynthetic performance of the invasive kelp Undaria pinnatifida may contribute to continued range expansion in a wave-exposed kelp forest community

Desmond, Matthew J.; Pritchard, Daniel W.; Hurd, Catriona L.; Richards, Derek K.; Schweikert, Katja; Wing, Stephen R.; Hepburn, Christopher D.

doi:10.1007/s00227-019-3593-2

Cited by 7 publications

(7 citation statements)

References 49 publications

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“…Such low E c values (4–6 μmol photon ⋅ m −2 ⋅ s −1 in our study) and elevated values of α were also previously observed in U . pinnatifida (Campbell et al, 1999; Dean & Hurd, 2007; Desmond et al, 2019) and suggest particular photosynthetic capabilities exist that confer this species the ability to efficiently exploit low light availability for photosynthetic processes (Campbell et al, 1999; Sato et al, 2021) and to colonize deeper zones (e.g., from 4 m to a maximum 14 m depth; Dean & Hurd, 2007). It is well described that the higher metabolic and vegetative productivity of fast‐spreading invasive seaweeds confer a competitive advantage over native algae (Andreakis & Schaffelke, 2012 and references therein).…”

Section: Discussionmentioning

confidence: 99%

“…Some authors state the superior photosynthetic performance and light‐use efficiency exhibited by adult sporophytes of U . pinnatifida (Campbell et al, 1999; Richards et al, 2011; Tait et al, 2015), critically contributed to its invasion success (Dean & Hurd, 2007, Desmond et al, 2019). Our results revealed that this apparent photosynthetic superiority could be further extrapolated to juvenile sporophytes.…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, seaweeds have photoacclimation strategies to improve the capture of light, such as the increment of photosynthetic efficiency, α, and the reduction of compensation irradiance, E c (Umanzor et al, 2000). The photoacclimation capabilities of U. pinnatifida adult sporophytes have been examined previously (Desmond et al, 2019;Richards et al, 2011;Tait et al, 2015). However, little is known about the photo-physiology of juvenile stages, which is critical during the recruitment stage (see Campbell et al, 1999;Morelissen et al, 2013).…”

Section: R E S E a R C H A R T I C L Ementioning

confidence: 99%

“…The photoacclimation capabilities of U . pinnatifida adult sporophytes have been examined previously (Desmond et al, 2019; Richards et al, 2011; Tait et al, 2015). However, little is known about the photo‐physiology of juvenile stages, which is critical during the recruitment stage (see Campbell et al, 1999; Morelissen et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Shading by giant kelp canopy can restrict the invasiveness of Undaria pinnatifida (Laminariales, Phaeophyceae)

Sandoval‐Gil

Sánchez-Barredo

Cruz-López

et al. 2023

Journal of Phycology

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The spread of non-indigenous and invasive seaweeds has increased worldwide, and their potential effects on native seaweeds have raised concern. Undaria pinnatifida is considered among the most prolific non-indigenous species. This species has expanded rapidly in the Northeast Pacific, overlapping with native communities such as the iconic giant kelp forests (Macrocystis pyrifera). Canopy shading by giant kelp has been argued to be a limiting factor for the presence of U. pinnatifida in the understory, thus its invasiveness capacity. However, its physiological plasticity under light limitation remains unclear. In this work, we compared the physiology and growth of juvenile U. pinnatifida and M. pyrifera sporophytes transplanted to the understory of a giant kelp forest, to juveniles growing outside of the forest. Extreme low light availability compared to that outside (~0.2 and ~4.4 mol photon ⋅ m −2 ⋅ d −1 , respectively) likely caused a "metabolic energy crisis" in U. pinnatifida, thus restricting its photoacclimation plasticity and nitrogen acquisition, ultimately reducing its growth. Despite M. pyrifera juveniles showing photoacclimatory responses (e.g., increases in photosynthetic efficiency and lower compensation irradiance, E c ), their physiological/vegetative status deteriorated similarly to U. pinnatifida, which explains the low recruitment inside the forest. Generally, our results revealed the ecophysiological basis behind the limited growth and survival of juvenile U. pinnatifida sporophytes in the understory.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: R E S E a R C H A R T I C L Ementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Shading by giant kelp canopy can restrict the invasiveness of Undaria pinnatifida (Laminariales, Phaeophyceae)

Sandoval‐Gil

Sánchez-Barredo

Cruz-López

et al. 2023

Journal of Phycology

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“…2). The flux of carbon that is best quantified for seaweeds is rates of photosynthesis/NPP of both individuals and beds (e.g., Gao and McKinley 1994, Chung et al 2011, Krause-Jensen and Duarte 2016, Raven 2017, 2018, Desmond et al 2019. Seaweed biomass enters coastal food webs as particulate and dissolved organic carbon (POC and DOC, respectively; e.g., Branch andGriffiths 1988, Pedersen et al 2020, and see review of Elliott Smith and Fox 2021).…”

Section: Natural Seaweed Beds: Carbon Fluxes and Fate In Food Websmentioning

confidence: 99%

Forensic carbon accounting: Assessing the role of seaweeds for carbon sequestration

Hurd

Law

Bach

et al. 2022

Journal of Phycology

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Carbon sequestration is defined as the secure storage of carbon‐containing molecules for >100 years, and in the context of carbon dioxide removal for climate mitigation, the origin of this CO2 is from the atmosphere. On land, trees globally sequester substantial amounts of carbon in woody biomass, and an analogous role for seaweeds in ocean carbon sequestration has been suggested. The purposeful expansion of natural seaweed beds and aquaculture systems, including into the open ocean (ocean afforestation), has been proposed as a method of increasing carbon sequestration and use in carbon trading and offset schemes. However, to verify whether CO2 fixed by seaweeds through photosynthesis leads to carbon sequestration is extremely complex in the marine environment compared to terrestrial systems, because of the need to jointly consider: the comparatively rapid turnover of seaweed biomass, tracing the fate of carbon via particulate and dissolved organic carbon pathways in dynamic coastal waters, and the key role of atmosphere–ocean CO2 exchange. We propose a Forensic Carbon Accounting approach, in which a thorough analysis of carbon flows between the atmosphere and ocean, and into and out of seaweeds would be undertaken, for assessing the magnitude of CO2 removal and robust attribution of carbon sequestration to seaweeds.

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Unravelling facilitation among introduced species, a mechanistic approach

et al. 2021

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Superior photosynthetic performance of the invasive kelp Undaria pinnatifida may contribute to continued range expansion in a wave-exposed kelp forest community

Cited by 7 publications

References 49 publications

Shading by giant kelp canopy can restrict the invasiveness of Undaria pinnatifida (Laminariales, Phaeophyceae)

Shading by giant kelp canopy can restrict the invasiveness of Undaria pinnatifida (Laminariales, Phaeophyceae)

Forensic carbon accounting: Assessing the role of seaweeds for carbon sequestration

Unravelling facilitation among introduced species, a mechanistic approach

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