किसी पारिस्थितिकी तंत्र में निम्नलिखित में से कौन प्राथमिक उपभोक्ता होते हैं?

The transition zone between two distinct ecosystems is known as a/an:

The transitional zones or boundary regions between two diverse ecological communities are called:

The transition zone between two distinct ecosystems is referred to as: