plankton decline – Desdemona Despair

The global Living Planet Index, 1970-2020. The LPI is based on 34,836 monitored populations of 5,495 vertebrate species. The white line represents the index value, and the shaded areas represent the statistical uncertainty surrounding the value. Graphic: WWF / ZSL

October 19, 2024

Global biodiversity report shows “catastrophic decline” in wildlife populations – “In just my lifetime, 50 years, we’ve seen a decline of 73 percent in the average size of these wildlife populations”

By Molly McCrea 18 October 2024 (CBS News) – A shocking new report on global biodiversity is detailing what it calls “a catastrophic decline” in wildlife populations ahead of a major international conference on biodiversity. On Monday, 21 October 2024, the United Nations will convene a two-week conference in Cali, Colombia called COP16. On the agenda […]

Research into Southern California’s history of ocean dumping was spurred by the discovery of mysterious and corroded barrels dumped off the coast of Los Angeles. Photo: David Valentine / ROV Jason

May 27, 2024

DDT found in deep-sea fish raises troubling concerns for food web – “Nothing is untouched”

By Rosanna Xia 6 May 2024 (Los Angeles Times) – For several years now, one question has held the key to understanding just how much we should worry about the hundreds of tons of DDT that had been dumped off the coast of Los Angeles: How, exactly, has this decades-old pesticide — a toxic chemical spread across […]

Satellite view of an algae bloom in the waters north of the Scandinavian and Kola peninsulas, 3 August 2023. The image was acquired by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite. One group of researchers observed large shifts in the location of summer coccolithophore blooms to the northeast between 2002 and 2018. They also identified an increasing presence of Phaeocystis pouchetii, a type of phytoplankton normally found in warmer waters that can form gelatinous colonies millimeters in diameter. The effect that such changes might have on the ecosystem is a topic of ongoing research. Data: MODIS data from NASA EOSDIS LANCE and GIBS/Worldview. Photo: Michala Garrison / NASA Earth Observatory

August 5, 2023

The ocean’s color is changing as a consequence of global warming – Color changes reflect significant shifts in essential marine ecosystems – “To actually see it happening for real is not surprising, but frightening”

By Jennifer Chu 12 July 2023 (MIT News Office) – The ocean’s color has changed significantly over the last 20 years, and the global trend is likely a consequence of human-induced climate change, report scientists at MIT, the National Oceanography Center in the U.K., and elsewhere. In a study appearing today in Nature, the team writes […]

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 […]

Micrographs showing microplastic particles embedded within a marine organism: (a) fluorescent PET MFs (23 × 100 μm) at 515–560 nm excitation; (b) fluorescent PP MF (28 × 100 μm) at 450–490 nm excitation; (c) fluorescent Nylon MFs (10 × 40 μm; yellow arrows) in the intestinal tract of a 50 h.p.f. brine shrimp (Artemia sp.), with 515–560 nm fluorescent excitation. Images taken at x25–200 magnification (Zeiss Observer Z1; AxioVision LE). Photo: Cole, 2016 / Scientific Reports

December 14, 2019

Microplastics are a million times more abundant in the ocean than previously thought

By MacKenzie Elmer 3 December 2019 (UCSD News Center) – Nothing seems safe from plastic contamination. It is pulled from the nostrils of sea turtles, found in Antarctic waters and buried in the fossil record. But a new study by researchers from Scripps Institution of Oceanography at the University of California San Diego suggests there could […]

Free air CO2 enrichment experiments using native Australian forests. Elevated CO2 levels are used to examine the effects on native forests, animals, soils and grasses. Photo: Western Sydney University

June 24, 2019

Leaving microbes out of climate change conversation has major consequences, experts warn – “Climate change is literally starving ocean life”

By Ivy Shih 19 June 2019 (UNSW) – An international group of leading microbiologists have issued a warning, saying that not including microbes – the support system of the biosphere – in the climate change equation will have major negative flow-on effects. More than 30 microbiologists from 9 countries have issued a warning to humanity […]

Spatial patterns of projected biomass changes. Shown are global ensemble projections at a 1 × 1 degree resolution for (A, C, and E) RCP2.6 and (B, D, and F) RCP8.5. (A and B) Multimodel mean change (percent, n = 10) in total marine animal biomass in 2090–2099 relative to 1990–1999 without fishing. (C and D) Variability among different ecosystem model and ESM combinations expressed as 1 SD. (E and F) Model agreement (percent) on the direction of change. Graphic: Lotze, et al., 2019 / PNAS

June 13, 2019

Study projects substantial declines in large fish and marine species with warming oceans – “There are substantial consequences for marine ecosystems on a global scale”

By Alison Auld 11 June 2019 (Dal News) – Populations of large fish and other marine species will decline steadily if little is done to stem the effects of climate change, according to a study led by Dalhousie University researchers that shows how greenhouse gas emissions could cause widespread global stock losses and habitat shifts. […]