The removal of 'Keystone' species will affect the
producers
consumers
ecosystem
decomposers
C.
ecosystem
Keystone species are the species that help to maintain local biodiversity within a community either by controlling populations of other species or by providing critical resources for a wide range of species. They has disproportionately large effect on its environment relative to its abundance. Thus, if the removal of these species occur they will affect the whole ecosystem.
Main cause of eutrophication is
fluctuation of temperature
unusual growth of aquatic vegetations
enrichment of nutrients
abundance of microorganisms
Trophic levels in ecosystem is formed by
only bacteria
only plants
only herbivores
organisms linked in food chain
Secondary productivity is rate of formation of new organic matter by
producer
parasite
consumer
decomposer
Identify the correct type of food chain
Dead animal > Blow fly maggots > Common frog > Snake
Grazing food chain
Detrital food chain
Decomposer food chain
Predator food chain
Which one of the following processes during decomposition is correctly described?
Fragmentation - Carried out by organisms such as earthworm
Humification - Leads to the accumulation of a dark coloured substance humus, which undergoes microbial action at a very fast rate
Catabolism - Last step in the decomposition under fully anaerobic condition
Leaching - Water soluble inorganic nutrients rise to the top layers of soil
