The Party of Wales leader Leanne Wood said:
"I am announcing today that Dafydd Elis-Thomas AM will be replaced as Plaid Cymru’s spokesperson on Transport and as Plaid Cymru’s nominee as Chair of the National Assembly’s Environment and Sustainability Committee.
"Plaid Cymru sought over the weekend to highlight the dangers posed to Wales by UKIP, because we fundamentally and sincerely believe that their politics and policies are not in the best interest of the people of our communities.
"Dafydd Elis-Thomas decided to publicly oppose this position without raising any concerns in advance.
"The people of Wales, and Plaid Cymru members, expect and deserve a national party that is united in addressing the challenges our country faces; on jobs, the economy and will continue to put Wales first.
"Alun Ffred Jones AM will be Plaid Cymru’s nominee for chair of the committee. He is a former Welsh Government Minister, and is an experienced and much respected colleague who has a keen interest in our nation's natural resources and in securing a sustainable and prosperous future for Wales. I am confident that fellow AMs will agree that he would be an asset to the committee as Chair.
"Transport is being added to Rhun ap Iorwerth’s responsibilities as Plaid Cymru’s Shadow Minister for Economy and Enterprise."