Warming ocean will drive many commercially important species to new habitats; detailed projections can help coastal communities adapt
Climate change isn’t just heating the surface of the Earth. It’s also warming deep ocean water, and along the coast of the northeastern U.S. bottom-water temperatures are expected to increase by 6.6 to 9 degrees Celsius by 2100.
That means that commercially important marine species will also continue to shift northward, which is important information for fishermen trying to make living in the region. Just how much and when they will move is the subject of new research published this week in the journal Progress in Oceanography.Continue reading “Global warming means major changes for U.S. fisheries”→
New vulnerability assessment to help guide fisheries management
Rapidly warming ocean temperatures off the coast of the Northeastern U.S. are likely to have a big impact on nearly all fish and other marine life in the region. Scientists with the National Oceanic and Atmospheric Administration carefully surveyed 82 species in a recent study, trying to identify which are the most vulnerable to global warming.
“Our method identifies specific attributes that influence marine fish and invertebrate resilience to the effects of a warming ocean and characterizes risks posed to individual species,” said Jon Hare, a fisheries oceanographer at NOAA Fisheries’ Northeast Fisheries Science Center (NEFSC) and lead author of the study. “This work will help us better account for the effects of warming waters on our fishery species in stock assessments and when developing fishery management measures.” Continue reading “Global warming: Goodbye to sea scallops?”→
Management not keeping up with changing conditions
The Gulf of Maine is simply getting too warm for cod, fisheries experts said in a new study released this week that links the warming to changes in the position of the Gulf Stream and to climate oscillations in the Atlantic and the Pacific. These factors add to the steady pace of warming caused by global climate change.
Cod stocks, once the mainstay of New England’s fisheries, are on the brink of collapse, hovering at 3 to 4 percent of sustainable levels. Even strict quota limits on fishermen failed to help cod rebound, and that’s unlikely to change any time soon, the researchers reported in the journal Science. Continue reading “New England cod decline linked with warming ocean”→
It’s simple: Cleaning the air improves water quality
FRISCO — Acid rain, once the scourge of freshwater ecosystems in the eastern U.S., is waning, and the health of New England lakes and streams is improving, scientists said this week after documenting declines in sulfate concentrations in snow and rain.
The data gathered by scientists working under the auspices of the NH Agricultural Experiment Station at the University of New Hampshire College of Life Sciences and Agriculture, show that sulfate concentration in rain and snow declined by more than 40 percent in the 2000s. Sulfate concentration in lakes declined at a greater rate from 2002 to 2010 than during the 1980s or 1990s. During the 2000s, nitrate concentration in rain and snow declined by more than 50 percent and nitrate concentration declined in lakes. Continue reading “Environment: Northeast lakes rebound from acid rain”→
Research aims to learn more about bird-eating fish
By Summit Voice
SUMMIT COUNTY — Everybody knows it’s a dog-eat-dog world out there, but when cute little seabirds start showing up in the stomachs of bottom-dwelling, deep-sea fish, biologists get curious.
So when USGS biologist Matthew Perry heard that New England fishermen were finding tiny dovekies inside monkfish, he decided to investigate how this previously unknown link in the ocean foodchain works.