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Topic: Algal Blooms
Should we all stop eating salmon? Why it’s suddenly become endangered
Investigative Journalism
October 19 - 2024
EN Europe, Global

Should we all stop eating salmon? Why it’s suddenly become endangered

Al Jazeera

Why have Atlantic salmon populations dropped so dramatically in British rivers, and is fish farming a help or hindrance? By Dwayne Oxford
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Biodiversity loss / Climate change / Parasites (e.g. sea lice) / Chemicals (e.g. Formaldehyde) / Organic waste (e.g. feed or feces) / Salmon
Salmon Farms in Patagonia Face Growing Opposition
Investigative Journalism
August 13 - 2024
EN South America

Salmon Farms in Patagonia Face Growing Opposition

New York Times

The Chilean industry’s expansion has drawn repeated challenges from environmentalists and Indigenous people of the region, and prompted calls for a moratorium. By Lucy Meyer and Casey Ann Smith
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Marine fauna / Organic waste (e.g. feed or feces) / Chemicals (e.g. Formaldehyde) / Biodiversity loss / Antibiotics / Salmon
The Perils of Farming Salmon in a Warming World
Investigative Journalism
July 02 - 2023
EN South America

The Perils of Farming Salmon in a Warming World

Mother Jones

The salmon farming industry presents itself as a sustainable solution to feeding humanity in a warming world. But as learned on a recent trip to Chilean Patagonia, intensive aquaculture practices can produce large negative environmental effects. By Jessica McKenzie
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Infrastructure (Cages or processing plants) / Climate change / Marine fauna / Organic waste (e.g. feed or feces) / Chemicals (e.g. Formaldehyde) / Antibiotics / Pesticides / Hunger / Nutrition / Investment and subsidies / Small-scale fishers / IUUs (illegal unreported and unregulated) / Fish Meal / Fish Oil Processing / Legislation / Recirculating Aquaculture Systems (RAS) / Salmon
At sea as on land? Activists oppose industrial farming in U.S. waters
Investigative Journalism
June 26 - 2023
EN North America

At sea as on land? Activists oppose industrial farming in U.S. waters

Mongabay

Agribusiness giants and other corporate interests are pushing to expand industrial finfish aquaculture into U.S. federal waters, arguing that it will help feed a growing global demand for seafood and have less environmental impact. They want Congress to pass legislation establishing a federal aquaculture system. Though Congress has not yet acted, a 2020 Executive Order is favorable to the effort. Environmental advocates are fighting against proposed congressional bills, and calling for a reversal of the executive order and a stop to the proposed projects in U.S. federal waters.
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Chemicals (e.g. Formaldehyde) / Pesticides / Antibiotics / Investment and subsidies / Small-scale fishers / Tourism / US: Nat'l Oceanic & Atmospheric Administration (NOAA) / Legislation / Bivalves / Low trophic-level fish / Plant-based (e.g. seaweed or kelp) / Recirculating Aquaculture Systems (RAS) / Salmon / Organic waste (e.g. feed or feces)
Harmful Algal Blooms: Understanding the Threat and the Actions Being Taken to Address It
Research
January 01 - 2022
EN North America

Harmful Algal Blooms: Understanding the Threat and the Actions Being Taken to Address It

Woods Hole Oceanographic Institute

A 2022 special report from Woods Hole Oceanographic Institution, examining the threat of harmful algal bloom growth and the actions being taken to address it.

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Marine fauna / Marine Flora (e.g. Poseidon meadows or seaweed) / Biodiversity loss / Tourism / Bivalves
Review of Harmful Algal Blooms in the Coastal Mediterranean Sea, with a Focus on Greek Waters
Research
August 22 - 2021
EN Europe

Review of Harmful Algal Blooms in the Coastal Mediterranean Sea, with a Focus on Greek Waters

Diversity

Anthropogenic marine eutrophication has been recognized as one of the major threats to aquatic ecosystem health. In recent years, eutrophication phenomena, prompted by global warming and population increase, have stimulated the proliferation of potentially harmful algal taxa resulting in the prevalence of frequent and intense harmful algal blooms (HABs) in coastal areas. Numerous coastal areas of the Mediterranean Sea (MS) are under environmental pressures arising from human activities that are driving ecosystem degradation and resulting in the increase of the supply of nutrient inputs. In this review, we aim to present the recent situation regarding the appearance of HABs in Mediterranean coastal areas linked to anthropogenic eutrophication, to highlight the features and particularities of the MS, and to summarize the harmful phytoplankton outbreaks along the length of coastal areas of many localities. Furthermore, we focus on HABs documented in Greek coastal areas according to the causative algal species, the period of occurrence, and the induced damage in human and ecosystem health. The occurrence of eutrophication-induced HAB incidents during the past two decades is emphasized.
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Perceived global increase in algal blooms is attributable to intensified monitoring and emerging bloom impacts
Research
June 08 - 2021
EN Global

Perceived global increase in algal blooms is attributable to intensified monitoring and emerging bloom impacts

Communications Earth & Environment

Global trends in the occurrence, toxicity and risk posed by harmful algal blooms to natural systems, human health and coastal economies are poorly constrained, but are widely thought to be increasing due to climate change and nutrient pollution. Here, we conduct a statistical analysis on a global dataset extracted from the Harmful Algae Event Database and Ocean Biodiversity Information System for the period 1985–2018 to investigate temporal trends in the frequency and distribution of marine harmful algal blooms. We find no uniform global trend in the number of harmful algal events and their distribution over time, once data were adjusted for regional variations in monitoring effort. Varying and contrasting regional trends were driven by differences in bloom species, type and emergent impacts. Our findings suggest that intensified monitoring efforts associated with increased aquaculture production are responsible for the perceived increase in harmful algae events and that there is no empirical support for broad statements regarding increasing global trends. Instead, trends need to be considered regionally and at the species level.
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Organic waste (e.g. feed or feces)
Developing an Atlas of Harmful Algal Blooms in the Red Sea: Linkages to Local Aquaculture
Research
September 11 - 2020
EN Asia

Developing an Atlas of Harmful Algal Blooms in the Red Sea: Linkages to Local Aquaculture

Remote Sensing

A study of harmful algae blooms in the Red Sea reveals a potential correlation with activity from the National Aquaculture Group (NAQUA), pointing to a need for a national wastewater management plan that will prevent excessive nutrient overload.
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Saving Martha | Keep King Island Fish Farm Free
Documentary Films
August 11 - 2019
EN (GR subtitles) Australasia

Saving Martha | Keep King Island Fish Farm Free

Patagonia

Tasmania is regarded as one of the wildest, most pristine states in Australia. In recent years however that reputation has been tarnished by the boom of the local salmon farming industry. With environmental regulations struggling to keep pace with the industry’s growth, the marine environments that host the industry have been significantly impacted and in some cases have approached collapse. Increased scrutiny of the industry – aided by the mobile nature of ocean pen farming – has forced operators to find new locations. When the industry set their sights on opening up a new territory on neighboring King Island – adjacent to the world-class waves of Martha Lavinia Beach – they were unaware they were also picking a fight with surfers worldwide.
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Marine fauna / Organic waste (e.g. feed or feces) / Small-scale fishers / Tourism / Salmon / Antibiotics
Aquacultures' Effect on the Environment
Research
April 19 - 2016
EN North America

Aquacultures' Effect on the Environment

UMASS Amherst, Debating Science

Aquaculture has a negative effect on the environment through both sediment and nutrient pollution.
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Organic waste (e.g. feed or feces) / Tourism
Chile's Salmon Farms Lose $800m as Algal Bloom Kills Millions of Fish
News
March 10 - 2016
EN South America

Chile's Salmon Farms Lose $800m as Algal Bloom Kills Millions of Fish

The Guardian

High ocean temperatures helped cause toxic bloom that has wiped out up to 20% of Chile’s total production for the year.
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Salmon
Record Algae Blooms Linked to Fish Farms
Paywall on this site
News
September 04 - 2012
EN Europe

Record Algae Blooms Linked to Fish Farms

The Fish Site

IRELAND - Record toxic algae blooms continue to close shellfish harvesting in the south west of Ireland are caused in part by the waste from fish farms. The local action group set up to oppose the expansion of fish farming, Save Bantry Bay, has drawn attention to the fact that fish farms are responsible for far more nitrogen and phosphorous in our coastal waters than sewage from major towns.
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Salmon / Bivalves / Ireland
A Review on Toxic and Harmful Algae in Greek Coastal Waters (E. Mediterranean Sea)
Research
May 11 - 2010
EN Europe

A Review on Toxic and Harmful Algae in Greek Coastal Waters (E. Mediterranean Sea)

National Library of Medicine

The Greek coastal waters are subjected to harmful algal bloom (HAB) phenomena due to the occurrence of species characterized as toxic (TX), potentially toxic (PT), and non-toxic, high biomass (HB) producers causing harm at multiple levels. The total number of (TX), (PT) and (HB) algae reported in this work are 61, but only 16 species have been associated with the occurrence of important HABs causing damage in the marine biota and the water quality. These phenomena are sporadic in time, space and recurrence of the causative species, and are related to the anthropogenically-induced eutrophication conditions prevailing in the investigated areas.

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