Influence of exotic plant invasions on the structure and functional attributes of native ecosystems has been extensively documented and debated. The complex interactions of invasive species with native ecosystems make invasion ecology an interesting and important area of research. Prosopis julifora native to south and central America was introdouced in India to meet the fuel-wood requirements of the rural poor and to restore degrated lands. Now, it has become an aggressive weed in several parts of the country and poses a serious threat to native biodiversity.

Colony collapse disaster (CCD) was reported as a major cause for decline in bee population and subsequent agricultural
productivity from many parts of the world. Many biological and physical factors such as diseases, insecticides,

Kappaphycus alvarezii (Doty) Doty (Rhodophyta: Solieriaceae) is a Philippine-derived macroalga introduced into the Gulf of Mannar Marine Biosphere Reserve, South India for mariculture in 2000. Here we report its bioinvasion on branching corals (Acropora sp.) in the Kurusadai Island. Qualitative data collected using underwater photography clearly indicated its invasion and establishment on live and dead corals as well as coral rubbles and pavements. It specifically invaded Acropora sp.