Ocean Deoxygenation Conference | Kiel 2018

Fisheries (harvest) are an ecosystem service that provide employment and nutrition in the global food system. Worldwide production of wild fisheries has leveled off, while demand continues to increase. Over harvesting switches fisheries from an ecosystem service to a stressor. Deoxygenation is anticipated to expand over the next decades, and can affect fisheries through negative effects on...

Increased deoxygenation has affected worldwide the biology and behavior of fish and invertebrates, and the structure and functioning of marine ecosystems. Hypoxia can affect organisms through several direct and indirect mechanisms, which are not mutually exclusive and whose effects may sum up to lead to the observed changes. The species that are directly affected by deoxygenation are often...

It turns out that the ocean carries a heavy burden of climate change by absorbing more than 30% of the carbon produced on land. While this is a great service in the first instance it results in physical and chemical changes that are already changing the biophysics of the ocean, triggering acidification and de-oxygenation. Here, I will explore the potential food security and economic...

Although the Eastern boundary upwelling ecosystems (EBUS) comprise less than 2% of the ocean area, they contribute more than 20% of the world’s marine capture. With catches about currently 8 million and a decadal-scale variation ranging from 2.5 to 13 million tonnes per year, the catches from the Humboldt upwelling system (HUS) are by far the largest of all EBUS. The anchoveta fishery of Peru...

“Ecosystem services” is a construct to motivate people and institutions to preserve and steward ecosystems. As such, the concept has been much discussed, but has been difficult to integrate into mainstream policies, except for aspects that are readily monetized, such as income from harvest. This has been particularly true for services that are not readily apparent to the average person. ...

Human-induced climate change such as ocean warming and acidification, threatens marine ecosystems and associated fisheries. In the western Baltic cod stock socio-ecological links are particularly important, with many relying on Atlantic cod for their livelihoods. A series of recent experiments revealed that cod populations are negatively affected by climate change, but an ecological-economic...