Classic Novel Ecosystem (image) University of Tennessee at Knoxville Caption This picture features a classic novel ecosystem. The ground cover is cogon grass, a highly invasive Asian grass that is one of the South's worst and fastest-growing weed problems. The trees in this forest are most native loblolly pine. The picture was taken recently on the flood plain of the Pascagoula River in Mississippi. Credit Andre Clewell Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.