Plant ecology is a sub-discipline of ecology which studies the distribution and interaction between plants and organisms. Plant ecology can be divided into plant ecophysiology, community ecology, landscape ecology and biosphere ecology. Releasing oxygen into the Earth's atmosphere is a primary process that falls into the discipline of plant ecology. While understanding the long-term perspectives of the topics, the book makes an effort in highlighting their impact as a modern tool for the growth of the discipline. A number of latest researches have been included to keep the readers up-to-date with the global concepts in this area of study.