Energy, water, nitrogen and soil minerals are other essential abiotic components of an ecosystem. The energy that flows through ecosystems is obtained primarily from the sun. It generally enters the system through photosynthesis, a process that also captures carbon from the atmosphere.opography also controls ecosystem processes by affecting things like microclimate, soil development and the movement of water through a system. This may be the difference between the ecosystem present in wetland situated in a small depression on the landscape, and one present on an adjacent steep hillside.
Definition of âstumbling blockâ - English Dictionary. âstumbling blockâ in British English. stumbling blocknoun [ C ] Lack of willingness to compromise on both sides is the main/major stumbling block to reaching a settlement.
1 Block (rural Australia), a small agricultural landholding. 2  Block (district subdivision), administrative region in some South Asian countries. 3  City block, the smallest area that is surrounded by streets.  License block, a geographically defined area for the purpose of the extraction of natural resources.