Ecosystems the size of Amazon rainforest “can collapse within decades”

Empirical relationship between system area and regime shift duration in freshwater, marine, and terrestrial systems. Graphic: Cooper, et al., 2020 / Nature Communications

March 12, 2020

Ecosystems the size of Amazon rainforest “can collapse within decades”

By Jonathan Watts 10 March 2020 (The Guardian) – Even large ecosystems the size of the Amazon rainforest can collapse in a few decades, according to a study that shows bigger biomes break up relatively faster than small ones. The research reveals that once a tipping point has been passed, breakdowns do not occur gradually […]

The Blue Acceleration: global trends in human exploitation of ocean resources. Graphic: Jouffray, et al., 2020 / One Earth

February 26, 2020

The “blue acceleration”: Study shows humans’ surging incursions into the sea

By Grace Dungey 13 February 2020 (Mongabay) – Humanity has depended on the ocean for millennia. Today, however, the rush to the sea is occurring with unprecedented diversity and intensity, propelled by population growth and demand for diminishing terrestrial resources. A study published in January in the new journal One Earth analyzed 50 years of data on 18 kinds […]

Spatial cumulative extents of the Deepwater Horizon (DWH) oil spill. (A) Cumulative NESDIS anomaly daily composites integrated from 20 April 2010 to 21 July 2010. Daily fishing closures are marked with gray lines; the cumulative fishing closure area is marked with a thick dashed yellow line. The black star represents the location of the DWH blowout. (B) Cumulative value of daily average oil concentrations (ppb), integrated across the same time span as (A) and across water depths. Vertical depth layers are 0 to 1 m, 1 to 20 m, and in 20-m increments down to 2500 m. Sediment and water samples with higher-than-background concentration are marked in bright green and dark blue circles, respectively. Red crosses in (B) represent approximate locations of DWH-related oil detections reported in previous studies. Daily fishery closures are marked with black polygons; the cumulative fishery closure area is marked with a dashed thick polygon. AB, Apalachee Bay; DP, Deep Plume; EFS, East Florida Shelf; FK, Florida Keys; LC, Loop Current System; TXS, Texas Shores; WFS, West Florida Shelf. (C) Categorization of the modeled oil spill are as follows: (i) nontoxic, PAH concentrations above background level and smaller than 0.5 and 1 ppb at the surface (depth, 0 to 1 m) and in the water column (depth, >1 m), respectively; (ii) toxic-to-biota and invisible, PAH concentrations 0.5 to 17 ppb at the surface and above 1 ppb in the water column; and (iii) toxic and visible, PAH concentrations above 17 ppb. In (C), categories were computed according to maximal concentrations across time. (D) Duration of toxic concentrations across the domain. (E) LC50 of 12 experiments examining the photoinduced toxicity to blue crab (31), fiddler crab (33), mahi mahi (29, 30), red drum (32), and speckled sea trout (32) (for more details, see table S2). (F) The spatial extent of the toxic concentrations from (E); color codes in (F) are according to bar colors in (E), representing concentrations exceeding LC50. In (F), toxic PAH of 0.5 ppb was concentrations were considered for surface waters only (depth, 0 to 1 m). Graphic: Berenshtein, et al., 2020 / Science Advances

February 17, 2020

The toxic reach of the Deepwater Horizon oil spill was much larger and deadlier than previous estimates – “Large areas of the Gulf of Mexico were exposed to invisible and toxic oil that extended beyond the boundaries of the satellite footprint and the fishery closures”

By Darryl Fears 12 February 2020 (The Washington Post) – The spread of oil from the Deepwater Horizon disaster in the Gulf of Mexico was far worse than previously believed, new research has found. As the worst offshore oil spill in U.S. history approaches its 10th anniversary in April, a study by two University of Miami researchers […]

Sea surface temperatures off the coast of Tasmania on November 23, 2010-2017. Data: Integrated Marine Observing System (IMOS). Graphic: The Sydney Morning Herald

February 2, 2020

Empty nets and tropical fish in Tasmania as climate change hits Southern Ocean

By Royce Millar and Chris Vedelago 31 January 2020 (The Sydney Morning Herald) – Rising temperatures and climate change have been blamed for the failure of stocks of some of the most popular eating fish in Australia’s Southern Ocean to recover from declines despite more than a decade of protection. The troubling findings come as […]

Dead salmon on the shores of the Ugashik, Alaska in July 2019. More than 100,000 fish in Bristol Bay were killed by heat stress in 2019. Photo: Birch Block

January 19, 2020

Record summer heat in Alaska wiped out at least 100,000 Kuskokwim salmon in Bristol Bay – “I’ve never seen a salmon that is still ocean-bright acting in such a way”

By Isabelle Ross 15 January 2020 DILLINGHAM, Alaska (Alaska Public Media) – The sun beat down relentlessly on Bristol Bay this summer, heating up the rivers and lakes where millions of sockeye salmon returned to spawn. July was the region’s hottest month on record, and in some rivers, that heat was lethal. Tim Sands, an […]

On 1 January 2016 and 2 January 2016, 6,540 common murre carcasses were found washed ashore near Whitter, Alaska, translating into about 8,000 bodies per mile of shoreline — one of the highest beaching rates recorded during the mass mortality event. Photo: David B. Irons

January 17, 2020

Huge “hot blob” in Pacific Ocean caused mass starvation in largest seabird die-off – “The magnitude and scale of this failure has no precedent”

By Michelle Ma 15 January 2020 (UW News) – The common murre is a self-sufficient, resilient bird. Though the seabird must eat about half of its body weight in prey each day, common murres are experts at catching the small “forage fish” they need to survive. Herring, sardines, anchovies and even juvenile salmon are no […]

Repparfjord is near the northernmost point of Norway. On 30 November 2019, Norway greenlit a copper mine that will dump two million tons of tailings in Arctic fjord each year. Photo: Thomas Nilsen / The Barents Observer

December 9, 2019

Norway greenlights copper mine that will dump two million tons of tailings in Arctic fjord each year – “Dumping of mining waste will kill every living thing on the ocean floor in the immediate area and disturb spawning grounds over a much greater distance”

ByThomas Nilsen 30 November 2019 (The Barents Observer) – “Allowing this to happen with a protected national salmon fjord doesn’t make sense at all,” said Silje Lundberg, head of Naturvernforbundet. The organisation is the Norwegian branch of Friends of the Earth. Lundberg said the planned dumping of tailings from the copper mine to the fjord […]

Map showing average surface sea temperature in the Sea of Okhotsk, compared with the late 1800s. Data: Berkeley Earth. Graphic: John Muyskens / The Washington Post

November 18, 2019

The climate chain reaction that threatens the heart of the Pacific – “When are the fish coming?”

By Simon Denyer and Chris Mooney 12 November 2019 SHIRETOKO PENINSULA, Japan (The Washington Post) – Lined up along the side of their boat, the fishermen hauled a huge, heavy net up from swelling waves. At first, a few small jellyfish emerged, then a piece of plastic. Then net, and more net. Finally, all the […]

Southern resident orca J16 makes a rainbow while surfacing in Puget Sound. Photo: Miles Ritter

October 16, 2019

Orca task force adds 13 recommendations at final meeting as “biological extinction” looms

By Bellamy Pailthorp 8 October 2019 (KNKX) – Their goal is clear: to prevent Puget Sound’s iconic Southern Resident killer whales from going extinct. Solving that problem is anything but simple. The task force convened by Gov. Jay Inslee to save the orcas added 13 new recommendations this week, at its final meeting. The additions […]

Aerial view of Frying Pan Lake in Alaska. If the proposed massive Pebble Mine, located between two prime salmon spawning streams, is ever built, Frying Pan Lake, would disappear beneath a giant pile of tailings. Bristol Bay is one of the world’s greatest fisheries. Photo: SeattlePI

October 10, 2019

Battle over Bristol Bay mine: Native, fisheries groups sue Trump – “There’s simply no precedent for open pit mining coexisting with sockeye salmon on the scale proposed by the Pebble Mine in Bristol Bay”

By Joel Connelly 8 October 2019 (SeattlePI) – Five Bristol Bay native and fisheries groups sued the Trump administration on Tuesday, seeking to restore Clean Water Act protection and block a giant open pit copper-goldmine proposed cheek-by-jowl with the world’s greatest sockeye salmon fishery. The suit was filed on National Salmon Day. The U.S. Environmental […]

Desdemona Despair

Category: fish decline