In my exploration of the natural world, I've come across various types of ecosystems, each unique and fascinating. The major ones include terrestrial ecosystems like forests, grasslands, and deserts, each hosting a distinct variety of plants and animals. Then we have aquatic ecosystems, split into two main groups: freshwater (like lakes and rivers) and marine (like oceans and coral reefs). There's also a fascinating world of man-made ecosystems like urban or agricultural areas, which are shaped by human activity. So, whether it's a lush rainforest or a bustling city, each ecosystem is complex and plays a vital role in maintaining our planet's balance.