Marine Biology News

Courtesy of Science Daily

Welcome to Sea and Sky's Marine Biology News. Here you can find links to the latest ocean news headlines in the topic of marine biology. Click on any yellow title below to view the full news article. The news article will open in a new browser window. Simply close the browser window when you are finished reading the article to return to the news article listing. You can use the "Click for More" link to go to a page with more news headlines.

 

Invasive shrimp-sucking parasite continues northward Pacific expansion
Researchers have identified an invasive blood-sucking parasite on mud shrimp in the waters of British Columbia's Calvert Island. The discovery represents the northern-most record of the parasite on the West Coast and is likely an indication of its ability to spread without human transport.
Publ.Date : Thu, 17 Sep 2020 18:04:05 EDT

Understanding the movement patterns of free-swimming marine snails
New research looks at the swimming and sinking kinematics of nine species of warm water pteropods (sea snails) to shed light on their ecology, predator-prey interactions, and vertical distributions. By using a high-speed stereophotogrammetry system, investigators were able to focus on how the shell shape, body geometry, and body size affect their swimming behavior from a fluid mechanics perspective, while image analysis and metabarcoding related swimming behaviors to night time and daytime vertical distributions.
Publ.Date : Thu, 17 Sep 2020 12:28:32 EDT

Discovery of microbes with mixed membranes sheds new light on early evolution of life
Current research suggests that more complex life-forms, including humans, evolved from a symbiosis event between bacteria and another single-celled organism known as archaea. However, evidence of a transition period in which the two organisms mixed where nowhere to be found. That is, until now. In the deep waters of the Black Sea, a team of scientists found microbes that can make membrane lipids of unexpected origin.
Publ.Date : Thu, 17 Sep 2020 10:53:22 EDT

Ocean acidification puts deep-sea coral reefs at risk of collapse
Deep-sea coral reefs face challenges as changes to ocean chemistry triggered by climate change may cause their foundations to become brittle, a study suggests.
Publ.Date : Thu, 17 Sep 2020 10:53:21 EDT

Scientists identify gene family key to unlocking vertebrate evolution
New research finds that the traits that make vertebrates distinct from invertebrates were made possible by the emergence of a new set of genes 500 million years ago, documenting an important episode in evolution where new genes played a significant role in the evolution of novel traits in vertebrates.
Publ.Date : Wed, 16 Sep 2020 13:10:41 EDT

Marine animals live where ocean is most breathable, ranges may shrink with climate change
New research shows that a wide variety of marine animals -- from vertebrates to crustaceans to mollusks -- already inhabit the maximum range of breathable ocean that their physiology will allow. The findings provide a warning about climate change: Since warmer waters will harbor less oxygen, some stretches of ocean that are breathable today for a given species may not be in the future.
Publ.Date : Wed, 16 Sep 2020 11:35:36 EDT

Can pumping up cold water from deep within the ocean halt coral bleaching?
Rising ocean temperatures cause marine heat waves, which place stress on living coral animals, as well as the photosynthetic algae on which they depend for energy. A new study is showing potential for the use of artificial upwelling (AU)-- or the application of cooler, deep water -- as a way to mitigate the thermal stress on corals.
Publ.Date : Wed, 16 Sep 2020 11:34:11 EDT

Mercury concentrations in Yukon river fish could surpass EPA criterion by 2050
The concentration of mercury in the fish in Alaska's Yukon River may exceed the EPA's human health criterion by 2050 if greenhouse gas emissions that cause global warming are not constrained, according to new research.
Publ.Date : Wed, 16 Sep 2020 11:34:09 EDT

Ocean algae get 'coup de grace' from viruses
Scientists have long believed that ocean viruses always quickly kill algae, but new research shows they live in harmony with algae and viruses provide a 'coup de grace' only when blooms of algae are already stressed and dying. The study will likely change how scientists view viral infections of algae, also known as phytoplankton - especially the impact of viruses on ecosystem processes like algal bloom formation (and decline) and the cycling of carbon and other chemicals on Earth.
Publ.Date : Tue, 15 Sep 2020 09:01:10 EDT

New rules for algae species classification
A team of evolutionary biologists and ecologists has a new idea for how scientists should classify algae species.
Publ.Date : Mon, 14 Sep 2020 16:55:41 EDT

Dams exacerbate the consequences of climate change on river fish
A potential response of river fish to environmental changes is to colonize new habitats. But what happens when dams and weirs restrict their movement? And are native and alien species similarly affected?
Publ.Date : Mon, 14 Sep 2020 13:19:18 EDT

Arctic transitioning to a new climate state
The fast-warming Arctic has started to transition from a predominantly frozen state into an entirely different climate with significantly less sea ice, warmer temperatures, and more rain, according to a comprehensive new study of Arctic conditions.
Publ.Date : Mon, 14 Sep 2020 11:22:32 EDT

Animals' magnetic 'sixth' sense may come from bacteria
A researcher may help answer why some animals have a magnetic 'sixth' sense, such as sea turtles' ability to return to the beach where they were born. The researchers proposes that the magnetic sense comes from a symbiotic relationship with magnetotactic bacteria.
Publ.Date : Mon, 14 Sep 2020 11:22:24 EDT

DNA unlocks a new understanding of coral
A new study challenges more than 200 years of coral classification. Researchers say the 'traditional' method does not accurately capture the differences between species or their evolutionary relationships. They developed a new genetic tool to help better understand and ultimately work to save coral reefs.
Publ.Date : Mon, 14 Sep 2020 11:22:05 EDT

Trout don't follow the weather forecast
Biologists studied the migration patterns of steelhead, a subpopulation of rainbow trout that migrates to the Pacific Ocean, where the growing fish hunt and feed until they return to their natal freshwater streams to spawn. Steelhead migration was triggered by the lengthening daylight of spring rather than factors like recent rains.
Publ.Date : Fri, 11 Sep 2020 20:00:06 EDT

Cuttlebone's microstructure sits at a 'sweet spot'
A professor has a lesson in one of his mechanical engineering courses on how brittle materials like calcium carbonate behave under stress. In it, he takes a piece of chalk composed of the compound and snaps it in half to show his students the edge of one of the broken pieces. The break is blunt and straight.
Publ.Date : Fri, 11 Sep 2020 14:17:11 EDT

Shedding light on coral reefs
New research generates the largest characterization of coral reef spectral data to date. These data are an initial step in building a quantitative understanding of reef water clarity. With these data, coral reef scientists can begin to develop models to address fundamental questions about how reefs function, such as how much light reaches the various reef zones or how ecological zonation on reefs might be driven by light absorption.
Publ.Date : Fri, 11 Sep 2020 11:08:00 EDT

Loss of sea otters accelerating the effects of climate change
The impacts of predator loss and climate change are combining to devastate living reefs that have defined Alaskan kelp forests for centuries, according to new research.
Publ.Date : Thu, 10 Sep 2020 15:03:18 EDT

Bacteria are in key role for successful recirculating aquaculture farming
Aquaculture is one of the fastest growing food production sectors globally. Due to continuous growth, ecologically, economically and socially sustainable sites for aquaculture are already in use, which has caused a need for new fish farming techniques. Recirculating aquaculture systems, technology that recycles and saves water, has expanded in recent years. The operation and management of bioreactors has been one of the biggest issues.
Publ.Date : Wed, 09 Sep 2020 10:02:59 EDT

New corals discovered in deep-sea study of Great Barrier Reef Marine Park
For the first time, scientists have viewed the deepest regions of the Great Barrier Reef Marine Park, discovered five undescribed species consisting of black corals and sponges, and recorded Australia's first observation of an extremely rare fish.
Publ.Date : Wed, 09 Sep 2020 09:28:24 EDT