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Study Offers Economical Solutions for Maintaining Critical Delta Environments

By Guest PostDecember 20, 2013Environment1954, age of humans, Anthropocene, black sea, bulgaria, Chernobyl, danube river delta, deforestation, delta environments, economical solutions, floodplain, frequency, Germany, historic data, hungary, iron gates dams, liviu giosan, main european waterway, nuclear bomb testing, nuclear reactor, radiocarbon analysis, radioisotope cesium 137, rising sea level, romania, sandy barriers, sea level, warming climate, wave dominated deltas, whoi

Millions of people across the world live or depend on deltas for their livelihoods.

Formed at the lowest part of a river where its water flow slows and spreads into the sea, deltas are sediment-rich, biodiverse areas, a valuable source of seafood, fertile ground for agriculture, and host to ports important for transportation.

At least half of the deltas around the world are so-called “wave dominated deltas” – open to the sea and under the impact of wave erosion. And many more deltas will come under wave dominance as dammed rivers carry less and less sediment. In a warming climate, sea levels are rising and storms are increasing in frequency and severity, posing threats to these deltas and the people and habitats dependent on them. (more…)

From military to MBA

By Guest PostSeptember 23, 2013Educationafghanistan, arabian peninsula, black sea, charles altman, d day planning, ernie lietzan, gi bill, heidi sandell, infantry, Iraq, level of accuracy, marine captain, marine corps base, marine infantry, mba program, middle east, military service, military to mba, national guard, operation new dawn, persian gulf, philip miller, quantico, robert paulus, university of minnesota, virginia

How the Carlson School supports veterans going for an MBA

Looking to apply to an MBA program, Heidi Sandell faced a common problem among veterans.

“I had a hard time translating my skills into something the business world could use and appreciate,” says Sandell, who served four years in the U.S. Navy. (more…)

Morphing manganese

By Guest PostAugust 31, 2013Environmentair, al mucci, aquatic environments, biogeochemistry, black sea, canada, electron, essential nutrient, george luther, golder associates, gulf, manganese, manganese oxide reduction, mcgill university, molecular oxygen, morphing manganese, new jersey, nitrate, ocean environments, ocean sediments, oxidation state, oxygen, photosynthesis, saint laurentian estuary, saint lawrence, sedimentary redox cycle, transition zone, university of delaware

UD researchers report new discovery in ‘Science’ about manganese in aquatic environments

An often-overlooked form of manganese, an element critical to many life processes, is far more prevalent in ocean environments than previously known, according to a study led by University of Delaware researchers that was published this week in Science.

The discovery alters understanding of the chemistry that moves manganese and other elements, like oxygen and carbon, through the natural world. Manganese is an essential nutrient for most organisms and helps plants produce oxygen during photosynthesis. (more…)

The Black Sea is a Goldmine of Ancient Genetic Data

By Guest PostMay 28, 2013Environmentalkenones, ancient genetic data, black sea, black sea sediment, brackish black sea, cercozoa, chris quince, dinoflagellates, dna techniques, dynamics, emiliania huxleyi, environmental changes, eustigmatophytes, fossil skeletons, freshwater, goldmine, haptophyte algae, Holocene, keith harris, lake environments, late glacial, liviu giosan, marco coolen, mariana filipova marinova, marine paleoecologist, mediterranean waters, microscope, organic walled dinocysts, past climate, plankton, precipitation, record, sedimentary genomic, strait of bosphorus, subatlantic climate, whoi, whoi geologist

New Study Reconstructs the Past Ocean ‘Paleome’

When Woods Hole Oceanographic Institution (WHOI) marine paleoecologist Marco Coolen was mining through vast amounts of genetic data from the Black Sea sediment record, he was amazed about the variety of past plankton species that left behind their genetic makeup (i.e., the plankton paleome).

The semi-isolated Black Sea is highly sensitive to climate driven environmental changes, and the underlying sediments represent high-resolution archives of past continental climate and concurrent hydrologic changes in the basin. The brackish Black Sea is currently receiving salty Mediterranean waters via the narrow Strait of Bosphorus as well as freshwater from rivers and via precipitation. (more…)

Human Impact Felt on Black Sea Long Before Industrial Era

By Guest PostSeptember 5, 2012Environmentblack sea, black sea basin, black sea salinity, black sea shelf, delta growth, impact of humans, industrial era

When WHOI geologist Liviu Giosan first reconstructed the history of how the Danube River built its delta, he was presented with a puzzle.

In the delta’s early stages of development, the river deposited its sediment within a protected bay. As the delta expanded onto the Black Sea shelf in the late Holocene and was exposed to greater waves and currents, rather than seeing the decline in sediment storage that he expected, Giosan found the opposite. The delta continued to grow. In fact, it has tripled its storage rate. (more…)

Identical Virus, Host Populations Can Prevail for Centuries, WHOI Researcher Reports

By Guest PostJuly 23, 2011Environmentalgae ecosystems, algal host cells, ancient plankton dna signatures, andrew w mellon foundation, atmosphere, benjamin van mooy, black sea, calcium carbonate shell, carbon cycle, carbon dioxide, climate, CO2, coccolithovirus, e huxleyi, ecological significance of viruses, emiliania huxleyi, fresh water, genetic populations of a virus, geological records, global carbon cycle, greenhouse emissions, marco coolen, marine algae, microbial ecologists, microscopic analysis, ocean, photosynthesis, phytoplankton, sediments, viral host dynamics in the ocean, viral pathogens, viruses, whoi, woods hole oceanographic institution

A Woods Hole Oceanographic Institution (WHOI) scientist, analyzing ancient plankton DNA signatures in sediments of the Black Sea, has found for the first time that the same genetic populations of a virus and its algal host can persist and coexist for centuries. The findings have implications for the ecological significance of viruses in shaping algae ecosystems in the ocean, and perhaps fresh water as well.

“The finding that the DNA of viruses and algal host cells can be preserved in the geological records is of great interest to microbial ecologists,” said Marco Coolen of WHOI’s Marine Chemistry and Geochemistry department and author of the study, which appears in the July 22 issue of Science. “This offers unprecedented insights into long-term algal, viral, and host population dynamics between globally important algae and their viral pathogens in the ocean.” (more…)

Trojan Horse for Russian Defense Industry

By PravdaJanuary 4, 2011Weaponsamerican, antiaircraft guns, baghdad, black sea, cruising endurance, defense deals, drones, f 16 fighters, france, french weaponry, georgia, innovative technologies, Israel, konstantin sivkov, latin america, military hardware, mistral, mistral helicopter carriers, russia, russian navy, state of the art combat ships, trojan horse, united states, Venezuela, vessel

Russia has finally decided to purchase two Mistral helicopter carriers from France in the total amount of 1.37 billion euros. It is not the first time when Russia concludes defense deals with France. However, the Mistral deal is the largest one in Russia’s recent history when Russia purchased military hardware from a foreign state. (more…)

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