Sargassum is a genus of brown seaweed. Over 300 species are distributed across the world in both temperate and tropical climates. The species fluitans and natans are unique because they spend their life cycle floating on the ocean, never attaching to the sea floor. Other seaweed species reproduce and begin life on the ocean floor.
Pelagic (open-sea) sargassum has been described as the “golden rainforest of the ocean” because of the floating ecosystem it supports in the Sargasso Sea, in the western Atlantic Ocean. It occurs naturally in the Gulf of Mexico and the Caribbean.
Floating sargassum first began arriving en masse on shores across the tropical Atlantic in 2011. Up to 10 000t arrived daily during a particularly severe peak season. Severe years since then include 2015, 2018 and 2022, but every year there is a significant influx. In the Caribbean, there has been good progress in understanding the pelagic sargassum seaweed.
We now have a better idea of where it’s coming from: likely a new southern area of growth.
In 2009 the first reports emerged of pelagic sargassum sightings off the coast of Ghana. Densities have increased annually ever since. In early March 2023, large quantities have again arrived on the shores of the Western Region of the country.
It is beneficial in many ways: marine species such as eels, white marlin and dolphin depend on it for spawning grounds, and commercial fish species including tuna depend on it for food.
Bu hikaye Farmer's Weekly dergisinin Farmer's Weekly 5 May 2023 sayısından alınmıştır.
Start your 7-day Magzter GOLD free trial to access thousands of curated premium stories, and 9,000+ magazines and newspapers.
Already a subscriber ? Giriş Yap
Bu hikaye Farmer's Weekly dergisinin Farmer's Weekly 5 May 2023 sayısından alınmıştır.
Start your 7-day Magzter GOLD free trial to access thousands of curated premium stories, and 9,000+ magazines and newspapers.
Already a subscriber? Giriş Yap
Optimising cherry production and quality
Growing cherries in a suboptimal climate requires manipulating trees and temperatures. But with a considerable market advantage, it is worth the effort. Lindi Botha visited ZZ2's Toscana farm, which for four weeks of the year takes prime position in the cherry market.
Biosecurity & nutrition: the foundation of pig farming success
JD Mostert, a consulting swine nutritionist at CS Vet, and Dr Stefan Steyn, a veterinarian at Afrivet, shared their expertise with Sinenhlanhla Mncwango, delving into why biosecurity and nutrition are critical pillars in establishing and maintaining a productive pig farm geared for long-term success.
The business of pig farming: practical steps for success
Running a pork farm requires knowledge and expertise. Mosele Lepheane, director of a small piggery in the Free State, spoke to Sinenhlanhla Mncwango about the structured approach needed to succeed, from drafting a business plan and managing cash flow to sourcing equipment and expanding market access.
A bright future awaits SA's Boran
Hurwitz Farming has become synonymous with Boran cattle in South Africa. But it hasn't always been plain sailing. Simeon Hurwitz spoke to Janine Ryan about the increasing popularity of this breed.
Get calves' feed exactly right
Give calves dry feed from two to three weeks. Milk alone isn’t enough, said this dairyman.
Syngenta Seedcare celebrates a decade of innovation
Syngenta's ambition is to enable their customers' investments to grow in healthy soil from treated seeds to young plants through innovation and collaboration, writes Magda du Toit.
Agri workers shine at Western Cape awards
Lindie-Alet van Staden, a garden and olive orchard manager at L’Ormarins Wine Estate in Franschhoek, was crowned as the Western Cape Prestige Agri-Worker of 2024 at a gala event recently held near Paarl.
Small and large farmers recognised at grain awards
The annual Grain SA/Syngenta awards ceremony bears testimony to the quality of farmers in the grain industry.
Growing partnerships: Fedgroup's flexible and innovative approach
Janine Ryan spoke to Warren Winchester, general manager of impact investing at Fedgroup, about why the company became involved in agriculture, and what it offers farmers and their immediate communities.
Why fish farms fail, and how to avoid becoming a statistic
The popularity of launching fish farms is not matched by their success. Leslie Ter Morshuizen, owner of Aquaculture Solutions, explores the factors that cause most of these businesses to go under.