পৰিৱেশ তন্ত্ৰ: বিভিন্ন সংশোধনসমূহৰ মাজৰ পাৰ্থক্য

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[[Image:Blue Linckia Starfish.JPG|thumb|[[Coral reef]]s are a highly [[Productivity (ecology)|productive]] [[marine ecosystem]].<ref>{{cite journal|last=Hatcher|first=Bruce Gordon|year=1990|title=Coral reef primary productivity. A hierarchy of pattern and process|journal=Trends in Ecology and Evolution|volume=5|issue=5|pages=149–155|doi=10.1016/0169-5347(90)90221-X}}</ref>]]

[[Image:River gambia Niokolokoba National Park.gif|thumb|[[Rainforest]] ecosystems are rich in [[biodiversity]]. This is the [[Gambia River]] in [[Senegal]]'s [[Niokolo-Koba National Park]].]]