Revisiting the economic profitability of giant kelp Macrocystis pyrifera (Ochrophyta) cultivation in Chile

Camus, Carolina; Infante, Javier; Buschmann, Alejandro H.

doi:10.1016/j.aquaculture.2018.12.030

Cited by 46 publications

(25 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our results elucidate the photoacclimation mechanisms that can allow farming Macrocystis pyrifera in relatively shallow waters (Camus et al. , ). Shallow water cultivation reduces the challenges of installing, monitoring, and harvesting of final biomass in deeper waters (Altamirano ).…”

Section: Discussionsupporting

confidence: 60%

“…However, because depth, in conjunction with turbidity events, may drive light‐limitation, especially for juvenile stages, M. pyrifera farms are installed in waters as shallow as 4 m in depth (Camus et al. , ). Nonetheless, farming individuals too shallow in the water column can result in over‐exposure to sunlight (Santelices ), for example if sub‐canopy blades and juvenile sporophytes are exposed suddenly to direct sunlight during partial harvesting activities (Kimura and Foster , Doty et al.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Photoacclimation and Photoprotection of Juvenile Sporophytes of Macrocystis pyrifera (Laminariales, Phaeophyceae) Under High‐light Conditions During Short‐term Shallow‐water Cultivation¹

Umanzor

Ramírez‐García

Sandoval‐Gil

et al. 2020

Journal of Phycology

View full text Add to dashboard Cite

This study was designed to understand better if and how juvenile sporophytes of Macrocystis pyrifera can photoacclimate to high‐light conditions when transplanted from 10 to 3 meters over 7 d. Acclimation of adult sporophytes to light regimes in the bathymetric gradient has been extensively documented. It primarily depends on photoacclimation and translocation of resources among blades. Among other physiological differences, juvenile sporophytes of M. pyrifera lack the structural complexity shown by adults. As such, juveniles may primarily depend on their photoacclimation capacities to maintain productivity and even avoid mortality under changing light regimes. However, little is known about how these mechanisms operate in young individuals. The capacity of sporophytes to photoacclimate was assessed by examining changes in their photosynthetic performance, pigment content, and bio‐optical properties of the blade. Sporophytes nutritional status and oxidative damage were also determined. Results showed that juvenile sporophytes transplanted to shallow water were able to regulate light harvesting by reducing pigment concentration, and thus, absorptance and photosynthetic efficiency. Also, shallow‐water sporophytes notably enhanced the dissipation of light energy as heat (NPQ) as a photoprotective mechanism. Generally, these adjustments allowed sporophytes to manage the absorption and utilization of light energy, hence reducing the potential for photo‐oxidative damage. Furthermore, no substantial changes were found in the internal reserves (i.e., soluble carbohydrates and nitrogen) of these sporophytes. To our knowledge, these results are the first to provide robust evidence of photoprotective and photoacclimation strategies in juveniles of M. pyrifera, allowing them to restrict or avoid photodamage during shallow‐water cultivation.

show abstract

Section: Discussionsupporting

confidence: 60%

mentioning

confidence: 99%

Photoacclimation and Photoprotection of Juvenile Sporophytes of Macrocystis pyrifera (Laminariales, Phaeophyceae) Under High‐light Conditions During Short‐term Shallow‐water Cultivation¹

Umanzor

Ramírez‐García

Sandoval‐Gil

et al. 2020

Journal of Phycology

View full text Add to dashboard Cite

show abstract

“…Southerly winds dominate from early autumn to early spring and tend to be stronger than in late spring and summer, promoting surface turbulence and vertical mixing (Valle-Levinson et al 2007). This agrees with the season (autumnspring) for optimum seeding and growth for farming Macrocystis pyrifera (Linnaeus) C.Agardh (Camus et al 2019). In addition, the limited light environment during the low productivity period (autumn-winter) restricts the growth of nuisance epiphytic algae in pilot crops of commercial macroalgae (Avila et al 1999;Lüning & Pang 2003;Romo et al 2001;Westermeier et al 1993).…”

Section: Macrophytes As Oa Refuges For Calcifying Marine Organismssupporting

confidence: 65%

Co-culture in marine farms: macroalgae can act as chemical refuge for shell-forming molluscs under an ocean acidification scenario

2019

View full text Add to dashboard Cite

With ongoing climate change, aquaculture faces environmental challenges similar to those of natural ecosystems. These include increasing stress for calcifying species, e.g. macroalgae and shellfish. In this context, ocean acidification (OA) has the potential to affect important socioeconomic activities, including shellfish aquaculture, due to changes in the seawater carbonate system. However, coastal environments are characterised by strong diurnal pH fluctuations associated with the metabolic activity of macroalgae; that is, photosynthesis and respiration. This suggests that calcifying organisms that inhabit these ecosystems are adapted to this fluctuating pH environment. Macrophyte-dominated environments may have the potential to act as an OA buffering system in the form of a photosynthetic footprint, by reducing excess of CO 2 and increasing the seawater pH and Ω arg. This can support calcification and other threatened physiological processes of calcifying organisms under a reduced pH environment. Because this footprint is supportive beyond the macroalgal canopy spatial area, this chemical refuge mechanism can be applied to support shellfish aquaculture, e.g. mussels. However, this approach should be tested in commercial shellfish farms to determine critical aspects of implementation. This includes critical factors such as target species and productivity rates. The degree of OA buffering capacity caused by the metabolic activity of macroalgae might depend on community structure and hydrodynamic conditions, creating site-specific responses. This concept might aid the development of future adaptive strategies, supporting marine ecological planning for the mussel aquaculture industry in Chile.

show abstract

“…In terms of transferability of these cost estimates to other setups or locations, we acknowledge that some costs may have been circumvented owing to local conditions, for instance, in Sweden there are no specific licensing fees. Relative to other economic assessments in literature [16][17][18] , there are specific differences in terms of inventory items, costs and estimated lifetime of investments; however, on the whole, costs are comparable.…”

Section: Discussionmentioning

confidence: 91%

“…We focus on the production of seaweed for human consumption which already is a large industry in Asia. Previous studies that have assessed the profit potential for seaweed farming [16][17][18] have not included the environmental impact of seaweed farming in the analysis. In this study we present a socioeconomic assessment that includes externalities from seaweed farming.…”

mentioning

confidence: 99%

Socioeconomic prospects of a seaweed bioeconomy in Sweden

Hasselström

Thomas

Nordström

et al. 2020

Sci Rep

View full text Add to dashboard Cite

Seaweed cultivation is a large industry worldwide, but production in Europe is small compared to production in Asian countries. In the EU, the motivations for seaweed farming may be seen from two perspectives; one being economic growth through biomass production and the other being the provisioning of ecosystem services such as mitigating eutrophication. In this paper, we assess the economic potential of large-scale cultivation of kelp, Saccharina latissima, along the Swedish west coast, including the value of externalities. The findings suggest that seaweed farming has the potential of becoming a profitable industry in Sweden. Furthermore, large-scale seaweed farming can sequester a significant share of annual anthropogenic nitrogen and phosphorus inflows to the basins of the Swedish west coast (8% of N and 60% of P). Concerning the valuation of externalities, positive values generated from sequestration of nitrogen and phosphorus are potentially counteracted by negative values from interference with recreational values. Despite the large N and P uptake, the socioeconomic value of this sequestration is only a minor share of the potential financial value from biomass production. This suggests that e.g. payment schemes for nutrient uptake based on the socioeconomic values generated is not likely to be a tipping point for the industry. Additionally, seaweed cultivation is not a cost-efficient measure in itself to remove nutrients. Policy should thus be oriented towards industry development, as the market potential of the biomass will be the driver that may unlock these bioremediation opportunities.

show abstract

Revisiting the economic profitability of giant kelp Macrocystis pyrifera (Ochrophyta) cultivation in Chile

Cited by 46 publications

References 34 publications

Photoacclimation and Photoprotection of Juvenile Sporophytes of Macrocystis pyrifera (Laminariales, Phaeophyceae) Under High‐light Conditions During Short‐term Shallow‐water Cultivation¹

Photoacclimation and Photoprotection of Juvenile Sporophytes of Macrocystis pyrifera (Laminariales, Phaeophyceae) Under High‐light Conditions During Short‐term Shallow‐water Cultivation¹

Co-culture in marine farms: macroalgae can act as chemical refuge for shell-forming molluscs under an ocean acidification scenario

Socioeconomic prospects of a seaweed bioeconomy in Sweden

Contact Info

Product

Resources

About

Revisiting the economic profitability of giant kelp Macrocystis pyrifera (Ochrophyta) cultivation in Chile

Cited by 46 publications

References 34 publications

Photoacclimation and Photoprotection of Juvenile Sporophytes of Macrocystis pyrifera (Laminariales, Phaeophyceae) Under High‐light Conditions During Short‐term Shallow‐water Cultivation1

Photoacclimation and Photoprotection of Juvenile Sporophytes of Macrocystis pyrifera (Laminariales, Phaeophyceae) Under High‐light Conditions During Short‐term Shallow‐water Cultivation1

Co-culture in marine farms: macroalgae can act as chemical refuge for shell-forming molluscs under an ocean acidification scenario

Socioeconomic prospects of a seaweed bioeconomy in Sweden

Contact Info

Product

Resources

About

Photoacclimation and Photoprotection of Juvenile Sporophytes of Macrocystis pyrifera (Laminariales, Phaeophyceae) Under High‐light Conditions During Short‐term Shallow‐water Cultivation¹

Photoacclimation and Photoprotection of Juvenile Sporophytes of Macrocystis pyrifera (Laminariales, Phaeophyceae) Under High‐light Conditions During Short‐term Shallow‐water Cultivation¹