Which ecosystem does not show variations dependent upon geographic location and rainfall
Marine ecosystem
Fresh water ecosystem
Desert ecosystem
Tropical ecosystem
Which one of the following is a characteristic feature of cropland ecosystem?
What will be the $P/R$ ratio of a climax community and a pioneer community. What explanation could you offer for the changes seen in $P/R$ ratio of a pioneer community and the climax community.
Match the columns :
Column - $I$ | Column - $II$ |
$(i)$Primary succession | $(i)$ Development of ecosystem |
$(ii)$Ecological succession | $(ii)$ Lichens |
$(iii)$ Base species on rocks | $(iii)$ Near to the equilibrium with the environment. |
$(iv)$ Climax community | $(iv)$ New species of lenvironment |
One of them is a submerged hydrophyte