Beach-cast deposition and commercial harvesting of a non-indigenous alga, Mazzaella japonica: Implications for macrofauna communities in Baynes Sound, British Columbia

Holden, Jessica J.; MacNeill, Shaun; Juanes, Francis; Dudas, Sarah E.

doi:10.1016/j.ecss.2018.06.008

Cited by 9 publications

(2 citation statements)

References 38 publications

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“…Beach-cast seaweeds, consisting in the accumulation of large amounts of algae detached from the bottom of the sea or coast platforms, are documented on beaches of many coasts around the world [1,2]. This is a natural and seasonal phenomenon which is mainly influenced by climate, wind conditions, eutrophication, and more importantly, the occurrence of considerable wave episodes; due to climate change, the number of beach-casts has been increasing dramatically over recent years [3,4].…”

Section: Introductionmentioning

confidence: 99%

Pharmacological and Cosmeceutical Potential of Seaweed Beach-Casts of Macaronesia

et al. 2020

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Seaweed beach-casts are a seasonal phenomenon that regularly deposits tons of algae biomass on beaches, which are usually disposed of in landfills. The present work aimed to contribute to the valorization of this biomass by studying bioactivities that reveal its potential in the pharmaceutical and/or cosmeceutical industries. Methanol and ethanol extracts and fractions from 15 beach-casts biomass were tested for a range of bioactivities. Eight of the most active samples exhibit IC50 values between 11.38 µg/mL and 19.28 µg/mL and selectivity indexes higher than 3.8, against NCI-H1299 (lung cancer) and T47D (breast cancer). Concerning antiaging potential, all the extracts tested presented UV protection, with SPF values above 30, like the standard sunscreen. Regarding aging-related enzymes, 24 samples were tyrosinase inhibitors exhibiting IC50 values from 9.01 µg/mL to 200.09 µg/mL. Eight extracts inhibited collagenase (IC50 < 248.76 µg/mL), two of them more actively than positive control EDTA (IC50 = 59.26 µg/mL). In addition to UV protection, the cumulative effect of antityrosinase and anticollagenase activities shown by the samples suggest that they may play a significant role in preventing skin photoaging. The results obtained demonstrate the high potential of beach-cast seaweed biomass as sources of cosmetic bioproducts with antiaging effects, and of selective cytotoxic metabolites.

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Section: Introductionmentioning

confidence: 99%

Pharmacological and Cosmeceutical Potential of Seaweed Beach-Casts of Macaronesia

et al. 2020

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“…First, seaweed stands contribute to energy capture and transfer, including primary, secondary and detritus production as well as carbon storage and nutrient cycling (Fredriksen 2003, Scheibling 2012, Hyndes et al 2014). Through their direct provision of food and structural habitat, seaweed forests also support higher levels of biodiversity, fuel food webs and provide biological links between marine ecosystems (Vetter and Dayton 1999, Gaylord et al 2007, Hyndes et al 2014, Bustamante et al 2017, Teagle et al 2017, Holden et al 2018. Seaweed beds not only provide habitat for year-round residents but also for species that use the habitat as foraging grounds such as birds and otters, as breeding and nursery areas particularly for fishes, and as refugia from predators (Seitz et al 2014, Bertocci et al 2015, Teagle et al 2017.…”

Section: Ecosystem Structure Functions and Servicesmentioning

confidence: 99%

Ecosystem-based management of seaweed harvesting

et al. 2019

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Harvesting wild seaweeds has a long history and is still relevant today, even though aquaculture now supplies >96% of global seaweed production. Current wild harvests mostly target canopy-forming kelp, rockweed and red macroalgae that provide important ecosystem roles, including primary production, carbon storage, nutrient cycling, habitat provision, biodiversity and fisheries support. Harvest methods range from selective hand-cutting to bottom trawling. Resulting ecosystem impacts depend on extraction method and scale, ranging from changes in primary production to habitat disruption, fragmentation, food-web alterations and bycatch of non-target species. Current management often aims for sustainable harvesting in a single-species context, although some agencies acknowledge the wider ecosystem structure, functions and services seaweeds provide. We outline potential ecosystem-based management approaches that would help sustain productive and diverse seaweed-based ecosystems. These include maintaining high canopy biomass, recovery potential, habitat structure and connectivity, limiting bycatch and discards, while incorporating seasonal closures and harvest-exclusion zones into spatial management plans. Other sustainability considerations concern monitoring, enforcement and certification standards, a shift to aquaculture, and addressing cumulative human impacts, invasive species and climate change. Our review provides a concise overview on how to define and operationalize ecosystem-based management of seaweed harvesting that can inform ongoing management and conservation efforts.

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Temporal Characterization of Sargassum (Sargassaceae, Phaeophyceae) Strandings in a Sandy Beach of Quintana Roo, Mexico: Ecological Implications for Coastal Ecosystems and Management

Vázquez-Delfín,

Robledo,

Freile-Pelegrín

2024

Thalassas

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Beach-cast deposition and commercial harvesting of a non-indigenous alga, Mazzaella japonica: Implications for macrofauna communities in Baynes Sound, British Columbia

Cited by 9 publications

References 38 publications

Pharmacological and Cosmeceutical Potential of Seaweed Beach-Casts of Macaronesia

Pharmacological and Cosmeceutical Potential of Seaweed Beach-Casts of Macaronesia

Ecosystem-based management of seaweed harvesting

Temporal Characterization of Sargassum (Sargassaceae, Phaeophyceae) Strandings in a Sandy Beach of Quintana Roo, Mexico: Ecological Implications for Coastal Ecosystems and Management

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