Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
490 views
in Biology by (26.4k points)
closed by

Species richness goes on decreasing as we move from equator to pole. Explain.

1 Answer

+1 vote
by (35.7k points)
selected by
 
Best answer

1. In tropical regions, there are lesser climatic changes throughout the year and availability of plenty of sunlight. 

2. Moreover, in tropical areas there are lesser disturbances like periodic glaciations as compared to those seen in the polar regions. 

3. In tropical regions, there is a stability over millions of years which favoured speciation and hence there is more species richness. 

4. Also in tropical regions, there are lesser migrations which reduce gene flow between geographically isolated regions. This too favoured speciation. 

5. There is more availability of intense sunlight, warmer temperatures and higher annual rainfall in tropics. These factors have brought higher species richness in tropics. 

6. Constant climatic conditions and abundance of resources in tropical regions provide more food preferences for animals species. 

7. E.g. fruits are available throughout the year in rain forests, therefore variety of frugivorous animals are seen here, as compared to the temperate regions.

In short, species richness or diversity for plants and animals decreases as we move away from equator to the poles.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...