The town of Arundel is not part of the South Downs national park
The future of Britain's newest national park has been discussed by candidates fighting for the Arundel and South Downs seat.
Nick Herbert, for the Conservatives, said the South Downs should be "protected and cherished".
Labour's Tim Lunnon said he hoped those within the park would reap the benefits of a rise in house prices and tourism.
Derek Deedman of the Liberal Democrats wants national park authorities to reflect the views of residents.
The South Downs was designated a national park on 31 March.
The area, which covers more than 600 sq miles of countryside in Sussex and Hampshire, is England's tenth national park.
Nick Herbert, who won the seat in 2005 with a 50.3% share of the vote, praised the "strong communities" of West Sussex where he said people "work together" and "look after each other", making the area special.
Labour parliamentary candidate Tim Lunnon said he was committed to affordable housing and preventing young people from being forced out of the area.
Derek Deedman, who is standing for the Liberal Democrats, said his main priorities for the constituency are fairer taxes and pursuing "green" policies.
Candidates announced for Arundel and South Downs are:
Conservative: Nick Herbert; Labour: Tim Lunnon; Liberal Democrat: Derek Deedman; UK Independence Party: Stuart Bower