The number of non-native species detected for the first time in marine areas outside their natural habitats is steadily increasing worldwide. Although thousands of species are transported around the globe every day, only a few manage to establish themselves in their new homeland and displace other species. So far, it has been largely unexplained why some species are so successful, while others never quite establish themselves.
In a still-developing story, Worldwide Dive and Sail has confirmed that the Fiji Siren has been lost at sea, luckily with no loss of life. According to a close source, the vessel sunk.
According to a report published by the International Union for Conservation of Nature (IUCN) at the UN Climate Change Conference in Bonn, Germany, the number of World Heritage sites threatened by climate change has risen from 35 to 62 in just three years, with climate change being the fastest growing threat.
The 12th Edition of the Blue Dolphin of Malta International Underwater Competition was held last weekend in Gozo. The competition was organised by the Federation of Underwater Activities Malta with the assistance of the Ministry for Gozo.
In the Bahamas, tons of boulders have been washed onto the cliffs more than 100,000 years ago. Whether the rocks were actually transported there by prehistoric "super storms" has long been controversial. Dr Alessio Rovere of MARUM (Center for Marine Environmental Sciences at the University of Bremen) and the Leibniz Centre for Tropical Marine Research (ZMT) – and his team have discovered that the strength of today's storms combined with a sea level several metres higher than normal would suffice.
Researchers from the University of Western Australia (UWA), the ARC Centre of Excellence for Coral Reef Studies (Coral CoE) and the Western Australian Marine Science Institution (WAMSI) have studied the impact of mass bleaching on reefs in Western Australia since 2016. The global coral bleaching of 2016 is the most prominent ever observed.
For the food webs in the ocean and processes such as the carbon cycle, photosynthetic single-cell organisms, the phytoplankton, play a decisive role. The density in which it occurs in the oceans depends on nutrients such as iron or nitrogen. Researchers at the GEOMAR Helmholtz Centre for Ocean Research Kiel have now proven for the first time that in the open ocean that it is a combination of several nutrients, rather than a single one, that inhibits or promotes the growth of phytoplankton.
Divers can enter the water either in full gear or without any gear, and be armed with just a single breath, mask, fins and snorkel. In addition to scuba diving, many divers also freedive. Usually, this is done during a snorkelling trip at shallow coral banks or rocky coves where there is something to be discovered. However, this is just like a try-dive, and is not what freediving is all about.
Electric shocks inflicted by a young electric eel feel as if you had accidentally touched an electric fence. In comparison, the shocks emitted from large electric eels feels as if one is been tasered – by nine tasers at the same time.
In November 2017, the final phase of the German research association for ocean acidification BIOACID (Biological Impacts of Ocean Acidification) ends. The experiments and analyses carried out by more than 250 scientists from 20 German research institutions over a period of eight years show that ocean acidification and warming, when combined with other environmental factors, are detrimental to marine life and endanger important ecosystem services for humans. A brochure summarises the main findings of the project.