The importance of a keystone species was shown by the extinction of the Steller's sea cow (Hydrodamalis gigas) through its interaction with sea otters, sea urchins, and kelp.
यदि पॉंच टेस्ट मैचों की श्रृंखला हो तो बाकी दो दिल्ली और कानपुर में खेले जाते हैं .Samanantar Samanantar