This book highlights some of the temporal changes in the environment and/or in biodiversity that have occurred in different ecosystems, ranging from tropical rainforests, wet eucalypt forests and alpine regions through to rangelands and deserts. Many important trends and changes are documented and they often provide new insights that were previously poorly understood or unknown. These data are precisely the kinds of data so desperately needed to better quantify the temporal trajectories in the environment and biodiversity in Australia.