Search results
Results from the WOW.Com Content Network
Because of the growing problem of introduction of invasive species into U.S. waters via ballast water, in January 1999, a number of conservation organizations, fishing groups, native American tribes, and water agencies petitioned EPA to repeal its 1973 regulation exempting ballast water discharge under the Clean Water Act (CWA).
This species has become invasive to North America, South Africa, South America, Asia, and Australia. This widely spread invasive species is often distributed by ship ballast water. [6] C. maenas is a voracious predator to many species such as worms, mollusks, oysters, and clams. The competitiveness and efficiency of this species out-competes ...
Ballast water discharges are believed to be the leading source of invasive species in U.S. marine waters, thus posing public health and environmental risks, as well as significant economic cost to industries such as water and power utilities, commercial and recreational fisheries, agriculture, and tourism. [11]
Organisms targeted by NISA are categorized as aquatic nuisance species, including in particular zebra mussels and Eurasian ruffe.To extend upon NANPCA, NISA authorizes regulation of ballast water, a key factor in the spread of aquatic invasive species; funding for prevention and control research; regional involvement with the Aquatic Nuisance Species Task Force; and education and technical ...
Further it was introduced in ballast water to the Great Lakes of North America and a number of adjacent lakes, and has become a pest classified among the 100 worst invasive species of the world. [2] Cercopagis pengoi is a predatory cladoceran and thus a competitor to other planktivorous invertebrates and smaller fishes. On the other hand, it ...
Mexico City, a sprawling metropolis of nearly 22 million people and one of the world’s biggest cities, is facing a severe water crisis as a tangle of problems — including geography, chaotic ...
The VGP sets numeric ballast water discharge limits for large commercial vessels. The limits are expressed as the maximum acceptable concentration of living organisms per cubic meter of ballast water. [11] The Coast Guard worked with EPA in developing the scientific basis and the regulatory requirements in the VGP. [5]
The city struggled for years with water quality problems and understaffing at its two treatment plants. A cold snap in early 2021 froze some treatment equipment and left many people with low ...