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Whale Bones on the Seafloor
Overview
The new **enrichment/colonization experiment** began in May 2014 at the Barkley Canyon site of the NEPTUNE observatory. Led by Professor Craig Smith of the University of Hawaii at Manoa, Professor Lisa Levin, from the Scripps Institution of Oceanography, and by ONC staff scientist Fabio De Leo, this deep-sea community sucession experiment uses subsea cameras to observe the changes in the seafloor communities (invertebrates and fish) triggered by the implantation of various organic and inorganic substrates such as **whale bones, wood and authigenic carbonate**. Whalebones and driftwood form chemosynthetic substrate habitats on the deep seafloor after being decomposed by specialized bacteria, attracting a distinct benthic fauna that resembles communities living in the extreme environments of hydrothermal vents and cold (methane) seeps. This type of experiment also sheds light into how benthic organisms utilize the sparse food resources available in deep-sea settings. This advanced ocean observatory technology allows researchers to monitor early community colonization and sucessional processes in ways never before possible, at high-frequency and high-resolution. "This is the first time we are able to control our observations in deep water by recording the experiments on a daily basis every two hours and turning on the lights at any time to make further observations." – said Dr. Fabio De Leo, ONC staff scientist. Previously, those types of experiments could only be monitored by sporadic revisits by ROVs or submersibles, or by autonomous free-vehicles, meaning a lot of the patterns of faunal colonization and succession could not be resolved.
Technologies shine spotlight on climate role of undersea canyons
Overview
Unprecedented high-resolution data from undersea canyons off Vancouver Island’s west coast is bringing new understanding of the importance of these canyons as rapid-transit corridors for carrying carbon from the ocean surface to the deep sea. An international study co-authored by Ocean Networks Canada (ONC) staff scientist and University of Victoria biologist Fabio De Leo uses synchronized real-time data from “Wally” the deep-sea crawler and NASA’s MODIS satellite for the first time to measure carbon transport from the sea surface to the deep ocean by wintertime ocean circulation, canyon rim eddies and downwelling – the sinking of dense, cold water beneath lighter, warmer water. Wintertime phytoplankton blooms observed by MODIS from outer space disappeared from surface waters off the west coast of the Island and reached Wally at 870 metres depth in Barkley Canyon within 12 to 72 hours. > “Data from Wally and MODIS supports that these canyons play an important role in rapidly transferring carbon to the deep sea during winter,” says De Leo. “This new understanding of canyon transport of organic matter, combined with improved carbon budget models, can help climate scientists better predict global warming scenarios.” Understanding the fate of carbon sources around the world is critical for predicting the amount of global warming. De Leo and colleagues showed that in winter, sinking organic carbon - such as dead phytoplankton - is transported from the ocean surface to the deep sea and permanently sequestered in seafloor sediments. Up until now, carbon transfer during winter was presumed to be insignificant in the global carbon cycle compared to spring and summer. With some 9,500 submarine canyons around the world, “these carbon storage numbers add up and could be globally important for Earth’s carbon budget as it relates to climate change,” says De Leo. Wally is equipped with sensors that measure water currents, fluorescence and turbidity and is connected to ONC’s cabled observatory. Remotely controlled via the worldwide web by a research team in Germany, the crawler has an onboard webcam providing detailed views of seafloor sediments and local marine life. NASA’s MODIS satellite measures ocean surface dynamics and tracks changes over time from space. [The study](http://www.readcube.com/articles/10.1038/s41598-017-11075-6) was led by scientists and researchers from universities and institutes in Canada, Germany, Spain, Italy and the US, and published in Nature magazine’s [Scientific Reports](https://www.nature.com/articles/s41598-017-11075-6) in September. ONC monitors Canada’s three coasts to continuously deliver real-time data for scientific research that helps communities, government and industry make informed decisions about our future. Using cabled ocean observatories, remote control systems, interactive sensors and big-data management, ONC enables evidence-based decision-making on ocean management, disaster mitigation and environmental protection. ONC is a UVic initiative funded by the Canada Foundation for Innovation, the Government of Canada, the Government of British Columbia, CANARIE and IBM Canada. **Media contact**
onc-comms@uvic.ca
Methane-snacking crabs suggest hedge against climate change
Overview
NEWS RELEASE
Sea urchins on the move
Overview
NEWS RELEASE New research has uncovered a change in behaviour of deep-sea fragile pink sea urchins off the south coast of Vancouver Island that is linked to climate change impacts including the “[Blob](https://www.oceannetworks.ca/news-and-stories/stories/the-warm-blob-chills-out/)”, a marine heatwave that persisted in the Pacific Ocean off North America between 2013 to 2016. Researchers from the Memorial University, Ocean Networks Canada (ONC) and the University of Victoria (UVic) found pink sea urchins (*Strongylocentrotus fragilis*) have been moving up into shallower waters as food sources and oxygen levels at lower depths decline due to a warming ocean. The research team analyzed seven years of physicochemical and video imagery data (2013-2020) collected at Barkley Canyon Upper Slope within ONC’s [NEPTUNE observatory](https://www.oceannetworks.ca/observatories/physical-infrastructure/cabled-networks/), along with 14 years of Fisheries and Oceans Canada trawl surveys, covering a 760-square kilometre area in the northeast Pacific Ocean. The data from NEPTUNE’s Barkley Canyon Upper Slope platform (depth 396 metres) included video cameras, oxygen sensors, and tools that monitor water currents and water physical properties.
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