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The Environmental Impacts of Harvesting Beach‐Cast Seaweeds

Abstract

Until recently the commercial collection of beach‐cast seaweeds in New Zealand was prohibited but the legislation has recently been amended to allow permitting of this activity. This review collates existing information on the role of beach‐cast seaweed in coastal ecosystems to describe the nature and extent of the effects that commercial removals of beach cast seaweed may have on the marine environment. It outlines the amount of beach‐cast seaweed available for harvest in New Zealand and the fate of seaweed when not collected; reviewing current information on the importance of beach‐cast seaweeds and its inhabitants on: feeding and nesting shorebirds, and nutritional contribution of seaweed inhabitants to nearshore coastal ecosystems when seaweed is washed back into the sea It also identifies key research gaps related to any environmental impacts that the removal of beach cast seaweed might have.

Marine macroalgae as a feasible and complete resource to address and promote Sustainable Development Goals (SDGs)

“…Thus, coastal erosion is reduced. Additionally, kelp that drifts ashore is important for providing nutrition to the plants and animals that inhabit coastal ecosystems while also stabilizing coastal ecosystems (Zemke‐White et al, 2005). Thus, macroalgae are important for maintaining the homeostasis of the food chain and ecological services, such as nurseries, recruitment, and protected areas for various aquatic species (Roth & Marliave, 1995).…”

Faunal composition within algal mats and adjacent habitats on Likuri Island, Fiji Islands

“…Tropical beaches are susceptible to algal beach-cast accumulation and degradation, because of increased fishing of grazers and high nutrient inputs from land activities that enhance algal production (Jackson, 1997; Bellwood et al , 2004; McManus & Polsenberg, 2004). High algal biomass may accumulate and decompose in the surf zone over short periods of time (Robertson & Hansen, 1982; Zemke-White et al , 2005), thus presenting a significant problem to commercial operations in the tourism sector (i.e. resorts and water sport operators).…”

Caracterização química, potencial antioxidante e atividade biológica de macroalgas arribadas do litoral brasileiro

“…From the studies described above, we can highlight ecological researches in many countries such as Argentina (Piriz et al 2003), Baltic Sea (Malm et al, 2004;Schultz-Zehden and Matczak, 2012), Canada (Glickman et al, 2012;Holden, 2016;Holden et al, 2016;Holden et al, 2018), Germany (Springer, 2014), Kenyan (Ochieng and Erftemeijer, 1999), Mexico (Milledge and Harvey, 2016), New Zealand (Hurd et al, 2004;Zemke-White et al 2003;Zemke-White et al, 2005;Thomsen and Wernberg, 2009;Dufour, 2011;Dufour et al, 2012), Scotland (Angus, 2018), Sweden (Kathleen, 2013Dessle, 2017;Risén et al, 2017) and USA (Young, 2003).…”