Ireland formally applies for European Economic Committee (EEC) membership in July 1961. Ó Móráin, as Minister for Lands and the Gaeltacht, delivers a widely reported address to the Castlebar Chamber of Commerce in 1962. In the speech, he argues that Ireland is “ready to subscribe to the political aims of the EEC” and that Ireland does not want to be seen as “committed” to its policy of neutrality. In the ensuing controversy, he and Lemass deny that there is any suggestion Ireland might or should abandon neutrality. Outside the country, foreign governments see this episode as a deliberately provoked debate to evaluate the government’s domestic room for manoeuvre on neutrality.
Ó Móráin is appointed Minister for Justice by Taoiseach Jack Lynch in 1968. It is in this role that he is most remembered. While he is still Minister, the Arms Crisis in Ireland erupts in 1970. This political scandal sees Government ministers Charles Haughey and Neil Blaney dismissed by the Taoiseach for alleged involvement in a conspiracy to smuggle arms to the Irish Republican Army (IRA) in Northern Ireland. Ó Móráin continually suffers from ill health, which is accentuated by his alcoholism. When the Arms Crisis erupts, Lynch comes to see him in a hospital in Galway and asks for his resignation. Ó Móráin is a witness at the subsequent Arms Trial. He testifies that he had passed on Garda intelligence reports about the involvement of ministers with the IRA to the Taoiseach before the arms were seized at Dublin Airport. Hus evidence at the trial has been described as “erratic.”
Ó Móráin loses his Dáil seat at the 1973 Irish general election and retires from politics. He dies at his home in Sutton, Dublin, in on May 6, 1983. With a Fianna Fáil guard of honour, he is buried in Castlebar. With his wife, Madge, he has one daughter, Sorcha, and two sons, John, and Michael, who dies in a road accident in 1972.
Colleran, and her twin Noreen, are born in Ballinrobe, County Mayo, on October 12, 1945, to John and Josie Colleran. One of a family of five children, her father is a school principal and her mother, also a primary school teacher, dies when she is just 11 years old. She completes her secondary education at St. Louis secondary school in Kiltimagh. She spends a lot of time outdoors as a child, particularly fishing, which sparks her interest in the environment.
On entering higher education, Colleran has a grant from the Department of Education, which requires that she do her studies through the Irish language. Her first choice, Medicine, is not available in Irish so she chooses Science. She graduates with a first-class primary degree in Science at University College Galway (now National University of Ireland, Galway) in 1967.
Colleran lectures in biology at Athlone Regional Technical College (now Athlone Institute of Technology) and Galway Regional Technical College (now Galway-Mayo Institute of Technology) before her appointment as a lecturer in microbiology at NUI Galway in 1976. She is appointed Associate Professor of Microbiology by the Senate of the National University of Ireland in 1990. She is a member of the university’s governing authority for a number of years, but steps down in May 2000 in connection with the selection procedure for the new university president. In October of that year, she is appointed professor of microbiology and chair of the department at NUI Galway.
Colleran is the first director of the Environment Change Institute at NUI Galway set up under the Higher Education Authority‘s Programme for Research in Third Level Institutions in 2000. In 2010, the Environmental Change Institute and the Martin Ryan Marine Research Institute are merged to form the current day Ryan Institute at NUI Galway.
In 1973, Colleran is elected to the committee of the Galway Association of An Taisce, part of a national voluntary organisation the aims of which are conservation in Ireland through education, publicity and positive action. She serves as membership secretary and then treasurer to the Galway branch before becoming chairman. In 1981, as chairman of the Galway branch, she hits back at claims from Galway County Council that An Taisce are “an anonymous group, wielding power unfairly.” She is involved in the compilation of a controversial planning report, published by An Taisce in 1983, which highlights abuse of planning laws by city and county councillors across Ireland, and in particular in counties Galway, Mayo, Donegal, Kerry and Louth.
Colleran serves as Environmental Officer for An Taisce before being elected National Chairman in 1987, the first time a chairman has come from one of the western county associations. She continues to use her position to campaign against misuse of planning laws, for a clamp down on pollution of rivers and lakes, and against a move to scrap An Foras Forbartha, a body that provides independent monitoring of pollution. During her three years as chairman, until May 1990, she is particularly involved in debates over local environmental and planning issues, in particular over gold mining in the west of Ireland, a proposed airport for Clifden, and the planned sewage treatment plant at Mutton Island, County Galway.
In 1991 plans are announced for a new visitor centre, to be located at Mullaghmore in The Burren. Colleran is among those who are part of an appeal, saying that while the plan for the national park is welcomed by An Taisce, they want the visitor centre to be located three or four miles from Mullaghmore.
President Mary Robinson appoints seven new members to her Council of State in February 1991, including Colleran. Other new members appointed at the time are Monica Barnes, Patricia O’Donovan, Quintan Oliver, Rosemarie Smith, Dónal Toolan and D. Kenneth Whitaker. The new Council of State represents a wide spectrum of Irish life and is widely welcomed, although Fine Gael is disappointed that its leader John Bruton is not included.
In 1991, Colleran is one of 15 people appointed to TaoiseachCharles Haughey‘s Green 2000 Advisory Group, to determine which problems will face the environment in the next century. The group is led by Dr. David Cabot, special advisor on environmental affairs.
In 2003, Colleran is elected as a member of the Royal Irish Academy.
Colleran is recognised at the annual NUI Galway Alumni Awards in 2004 when she receives the award for Natural Science, sponsored by Seavite Bodycare Ltd., which acknowledges a graduate who has made an outstanding contribution in the field of natural science.