
He believed that some changes may be due to demographics, a drop of 40,000 in the 16-18 age-group, while the decline in enrolments by Level 1 students may be partly explained by rising school standards.
But he was concerned that the results may point to a more worrying trend of more vulnerable young people disappearing from college and school rolls
"There could be longer-term socio-economic implications if the trends suggested by this research are borne out by further studies," he said.
Tom Pierce, NUS Vice President (Further Education), believed that the drop in numbers is due to the abolition of the Education Maintenance Allowance.
"Ministers were warned over and over again by teachers, students, parents, economists and college leaders that scrapping EMA would harm participation in further education and now they are reaping what they sowed," said Pierce.
"In an increasingly hostile jobs market and a stagnant economy for many young people further education is their only chance to get a foot-hold in the world.
"The Government didn't listen and its paltry replacement is a failure, they must admit they were wrong and properly support young people to get the skills they need to build a life for themselves."
But a Department for Education spokesman said record numbers of 16 and 17-year-olds were already in education or training, with 1.5 million places and 360,000 apprenticeships, guaranteeing a suitable place in sixth-form, college or work-based training for every student.
"We are targeting financial support at students who need it most to get through their studies – through the new £180m a year bursary fund, with further transitional support available for those students who were already drawing the EMA," he said.
The AoC will undertake future research into enrolment patterns and student retention and will repeat its enrolment survey in September 2012 to monitor the situation year on year.
Rachel Salmon