British Columbia voters sent a message that Canadians are deeply concerned about the environment and climate issues will be at the forefront in October's federal election campaign, jubilant Green Party supporters said Monday night.

Voters in Nanaimo elected Paul Manly of the Greens as their new member of Parliament, barely six months before October's federal vote.

With 96 per cent of polls reporting in the Nanaimo-Ladysmith byelection, Manly received 37.1 per cent of the vote.

John Hirst, the Conservative candidate, was a distant second with 25.1 per cent of the vote. The NDP polled 22.9 per cent and Liberal candidate Michelle Corfield received 11.1 per cent of the vote.

"People really want to see action on climate change," said Manly, who called his victory "historic."

Watch Manly discuss his byelection win:

Paul Manly discusses the 'political courage' required to act on climate change after his byelection win. 1:09

Manly will become the second Green Party member in Parliament, joining Leader Elizabeth May.

His victory shows the other parties that Canadians are serious about climate change, Manly said, adding he expects the Green wave of support to grow in the October election.

"It's time to step up and do what needs to be done and have a little bit of political courage to deal with climate change properly," Manly said. "Stop subsidizing the fossil fuel industry."

'Brave to vote for real change'

Ilan Goldenblatt, Manly's campaign manager, said voters in Nanaimo served notice to the Liberals, Conservatives and New Democrats that Canadians want more movement on environmental issues.

"There's a real strong sense here on the West Coast and on Vancouver Island that the three old-line parties are just slow on the uptake on actually committing to real action," he said.

Green Leader Elizabeth May said in a statement Manly's win signals a new era in federal politics. The win doubles Green Party caucus in the House of Commons, where May has served as the only Green MP since 2011.

"It is brave to vote for real change," said May in a statement. "Paul and I will work tirelessly to continue to earn the trust of Canadians."

'People are serious about climate change,' Manly, pictured hugging his wife Samantha, said after his byelection win. (Chad Hipolito/Canadian Press)

Gord Johns, Courtenay-Alberni NDP MP, said the Green win will be felt in Prime Minister Justin Trudeau's office and among the Liberal caucus.

"This vote is a clear message to the Liberals and Justin Trudeau," said Johns at a subdued NDP election headquarters for defeated candidate Bob Chamberlin. "The people in Nanaimo-Ladysmith and most Canadians are unhappy with what's going on in Ottawa. This is what we heard on the doorstep everyday."

He called the Green win a "protest vote," and said the NDP campaign for the October election "starts tonight."

Backing up May in Parliament

Manly said he was heading to Ottawa to help May.

"It sends a message clearly that we've seen a wave come across from Prince Edward Island ... that people are serious about climate change," he said.

Manly told the crowd of cheering supporters he will work hard to do better for the community.

"How we can change the economy — that we are working in to protect the environment that we need for our health, for our children, for our grandchildren," he said. "How we can do a better job of taking care of people who are less fortunate."

He said governments should stop subsidizing the "old" economy.

"We moved beyond the horse and buggy and it's time to move beyond the internal combustion engine," Manly said, as the crowd cheered.

"Those days should be over. It's time to move forward."

Manly, is a researcher, a filmmaker and a communications specialist. He was the Green Party's candidate in 2015 in the same riding and finished fourth with 20 per cent of the vote.

The riding has been vacant since January when former New Democrat MP Sheila Malcolmson resigned the seat to run successfully in a provincial byelection in Nanaimo.

This is the third election in eight months for residents of this Vancouver Island city.

Seven candidates were in the contest, which saw five federal leaders visit the riding, including Prime Minister Justin Trudeau and Conservative Leader Andrew Scheer.

The Nanaimo area has traditionally swung back and forth between New Democrat or Conservative-leaning MPs.