Exotic earthworm invasion increases soil carbon and nitrogen in an old-growth forest in southern Quebec.

Canadian Journal of Forest Research | April 1, 2006| | Copyright

Abstract: To test whether invasion of exotic earthworms affects soil carbon (C) and nitrogen (N), we sampled the litter and upper mineral soil (to 30 cm) at a series of sites varying in their earthworm populations in an old-growth beech-maple forest at Mont St. Hilaire, southern Quebec. We measured earthworm abundance and biomass using hand-sorting and chemical extraction (allyl isothiocyanate) methods. They gave similar results, though there was evidence of size and species-specific biases. Abundance and biomass of the earthworms ranged from <10 to>100 earthworms x [m.sup.-2] and ... <10 to 125 g x [m.sup.-2], respectively, and were correlated with distance from a nearby lake (negatively) and soil pH (positively). The presence of earthworms was associated with a decrease in the mass and thickness and an increase in the C/N quotient of the litter layer. There were no significant changes in C and N mass of the mineral soil between 0 and 10 cm, but the underlying layers (10-20 and 20-30 cm) in sites with><10 to>

<10 a><10 a>

Read all of this article with a FREE trial to HighBeam Research

Related newspaper, magazine, and trade journal articles from HighBeam Research

(Including press releases, facts, information, and biographies)

Gurkhas to receive improved terms and conditions of service.
M2 Presswire ; ...and selection of new Gurkha recruits should take place in Nepal; Gurkhas should serve only in formed Gurkha units, at least for...AFPS) benefits. The Gurkha Offer to Transfer...exercise will give serving Gurkhas a one-off opportunity...
Gurkhas Marching to a New Beat
Newspaper article from: The Washington Post ; ...main role of the Gurkhas has been to help...the five remaining Gurkha battalions, three...London were eyeing the Gurkhas with sharp knives...for the network of Gurkha loyalists in Britain...retiring in June as a Gurkha major after 28 years...other changes in the Gurkhas that go ...
Gurkhas fought all round the world for us, the least I could do was bike 1000 miles for them..
Newspaper article from: Evening News - Scotland ; ...creation of the British Brigade of Gurkhas - many of these brave men have...destitute and penniless. Former Gurkha commander Major Don Whitehead...than most the debt owed to the Gurkhas for their unflinching loyalty...who once led the renowned 7th Gurkha Rifles and is now an Army careers...
Gurkha veterans wage tough new fight to settle in Britain.(WORLD)
Newspaper article from: The Christian Science Monitor ; ...that as few as 100 Gurkha veterans would meet...medical condition. Gurkhas say their loyalty...khukuris, which Gurkha troops carry into...tasted blood. The Gurkhas were based in Hong...settle in Britain. Gurkhas take the fight off...Today, hundreds of Gurkha veterans and their...
GURKHAS CAMPAIGN FOR UK CITIZENSHIP; Protest march on Home Office.(News)
Newspaper article from: Liverpool Echo (Liverpool, England) ; ...History of the Gurkhas THE GURKHAS take their name from...adversaries they allowed Gurkha soldiers to enlist in...bravery and loyalty of Gurkha soldiers is reflected...CAMPAIGN: Up to 400 retired Gurkhas protested in Liverpool...COLIN LANE; PLEA: Ex-Gurkha soldiers
The Gurkhas' new fight.(Nepal soldiers fighting for UK army demand better pay and benefits)(Brief Article)(Statistical Data Included)
Magazine article from: The Economist (US) ; ...number of retired Gurkhas sought to draw...the fact that Gurkha pay had fallen...opportunities for Gurkhas' children in Britain, and for Gurkha ex-soldiers...Militant-minded Gurkhas point out that...30,000 former Gurkha soldiers in Nepal...
Gurkhas given right to settle in the UK.
News Wire article from: M2 Presswire ; ...said: "Generations of Gurkhas have served the United...Affairs Select Committee and Gurkha representatives. "This means we can now welcome any Gurkha who has served for four...Government granted the first Gurkhas the right of settlement...
Gurkhas retiring before July 1,1997 can settle in UK.
Newspaper article from: United News of India (UNI) (New Delhi, India) ; ...can now welcome any Gurkha who has served for...residency to 36,000 Gurkhas, who left before...of supporters of Gurkha rights was intensified...on behalf of the Gurkhas, said, ''This...of supporters of Gurkha rights was intensified...on behalf of the Gurkhas, said, ''This...
Gurkhas celebrate victory in their battle to live in UK; UK & WORLD NEWS.(News)
Newspaper article from: Western Mail (Cardiff, Wales) ; ...Martin Howe, the Gurkhas' solicitor, said in...victory for the gallant Gurkha veterans of Nepal...be allowed entry. The Gurkhas in this test case represented...Shrestha, 46, along with a Gurkha widow. All had applied...Kong and Macau. The Gurkhas directly affected by...
Gurkhas on patrol in Dili; Known for their military prowess, the Nepalese soldiers were the first.(World)(A Letter From)
Newspaper article from: The Christian Science Monitor ; ...stability to East Timor. The Gurkhas were the first in when...the high ground" - a Gurkha specialty - and protect...East Timor, but the Gurkhas are highly visible...before 3 p.m. the Gurkhas encounter a pair of Australians...that abuts theirs. The Gurkha corporal and one of the...

Find more facts and information related to the article "Exotic earthworm invasion increases soil carbon ..."