Fish urine plays an important role in coral reefs' food chain—but unsustainable fishing can devastate this natural nutrient flow.
Increasing ocean acidification, brought about by humanmade carbon emissions, reduces sperm performance in a species of sea urchin, say scientists. The impact of climate change on global seawater conditions could change the rules of sperm competition for many important marine species, the pioneering new study has shown.
The largest migration on Earth is very rarely seen by human eyes, yet it happens every day. Billions of marine creatures ascend from as far as 2km below the surface of the water to the upper reaches of the ocean at night, only to then float back down once the sun rises. This huge movement of organisms – ranging from tiny cockatoo squids to microscopic crustaceans, shifting for food or favourable temperatures – was little known to science until relatively recently.
The balmy waters of the Caribbean could turn into a deadly heat trap for countless tiny creatures. Authors of a new study conducted at the Smithsonian Tropical Research Institute (STRI) in Panama discovered that microscopic sea urchin eggs and larvae may suffer stunting or death when the water temperature spikes just a couple of degrees above normal, adding to the impact of climate change in already warm tropical oceans.
To see how much the population has changed over the years, Breitburg and other biologists and archaeologists undertook the largest survey to date of any shellfishery, chronicling the Chesapeake Bay's oyster population from almost 800,000 years ago to the present day. The researchers were surprised to find thousands of years during which oyster populations stayed stable – the era of Native Americans.
Life is thriving on the UK's tallest underwater mountains, an expedition has revealed. Scientists used robotic submersibles to dive more than 2,000m beneath the waves to explore four seamounts off the west coast of Scotland.
Greenhouse gases are already having an accelerating effect on sea level rise, but the impact has so far been masked by the cataclysmic 1991 eruption of Mount Pinatubo in the Philippines, according to a new study led by the National Center for Atmospheric Research (NCAR).
Batches of sand from a beach on the Delaware Bay are yielding insights into the powerful impact of temperature rise and evaporation along the shore that are in turn challenging long-held assumptions about what causes beach salinity to fluctuate in coastal zones that support a rich network of sea creatures and plants.
Warming oceans caused by climate change may be leading to an increase in cholera and other infections caused by Vibrio bacteria, according to more than 50 years of data on climate and populations of ocean microbes.
Tropical Porites corals adjust their internal pH to enable themselves to form calcium carbonate and grow under elevated carbon dioxide concentrations -- even for a longer period of time. In order to understand the ability of pH regulation in more detail, researchers have used the boron isotope method to examine samples of corals that have existed at natural carbon dioxide vents in Papua New Guinea for decades.
Scientists, anglers, weather watchers and boaters just got a boost yesterday when a NOAA Chesapeake Bay smart buoy was deployed at the mouth of the York River.