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Tuesday, January 21, 2025

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Animal welfare advocates work to save CA's Prop 12 under Trump; Health care advocate says future of Medicaid critical for rural Alaskans; Trump pardons roughly 1,500 criminal defendants charged in the Jan. 6 Capitol attack; MA company ends production of genetically modified Atlantic salmon.

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Donald Trump's second term as President begins. Organizations prepare legal challenges to mass deportations and other Trump executive orders, and students study how best to bridge the political divide.

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"We can't eat gold," warn opponents of a proposed Alaskan gold mine who say salmon will be decimated. Ahead of what could be mass deportations, immigrants get training about their rights. And a national coalition grants money to keep local news afloat.

NH duckweed study aims to counter impacts of manure, farm runoff

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Tuesday, July 16, 2024   

University of New Hampshire scientists said a common aquatic plant called duckweed could help filter polluting runoff from dairy farms and so-called manure lagoons.

They are investigating how growing duckweed in different bodies of water can capture excess nutrients such as nitrogen and phosphorus, which can affect groundwater quality and create toxic algae blooms in lakes and rivers.

Anna O'Brien, assistant professor of molecular, cellular, and biomedical sciences at the University of New Hampshire, said duckweed could be a sustainable way to counter agricultural waste.

"Once you've got duckweed in a pond, as long as the conditions don't change a lot, they'll likely persist in that pond and not need to be re-added," O'Brien explained.

O'Brien noted researchers want to determine if duckweed could then be safely harvested and used as a type of green manure fertilizer on farms. It is estimated more than 90% of water pollution problems in New Hampshire stem from polluted runoff.

There are roughly 100 dairy farms in New Hampshire and the majority are considered small with fewer than 100 milking animals. The state has avoided many of the problems associated with industrial dairy but nutrient runoff also stems from urbanization; new developments with fertilized green lawns.

O'Brien acknowledged while some people may not like the look of duckweed, it could be used near new buildings to protect area waterways.

"It can be really important to seed that with a lot of plants and biological material," O'Brien emphasized. "So that it actually works as a nutrient capture system and a filtration system for the runoff going downstream."

O'Brien pointed out duckweed grows rapidly and is easily found throughout New England ponds, lakes and streams, making it ideal for experiments. She and her colleagues are examining the differences in genetic makeup of duckweed species and their effectiveness in nutrient uptake.

She added the research findings could have significant implications for New Hampshire farmers and their surrounding environment.


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California's Proposition 12 mandated minimum space requirements for egg-laying hens but does not apply to chickens raised for meat. (JackF/Adobe Stock)

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