Ecosystem Flashcards
Name two man made ecosystems
crop fields, aquarium
The rate of biomass production is called
productivity
The annual net primary productivity of the whole biosphere is approximately ___ billion tons
170
the productivity of the oceans are only __ billion tons
55
The important steps in the process of decomposition are
fragmentation, leaching, catabolism, humification and
mineralisation.
For Lea, Can He Mine?
Decomposition is largely an oxygen-requiring process. True or False?
True
The rate of decomposition is controlled by c
chemical composition of detritus and climatic factors.
decomposition rate is slower if detritus is rich in _____ and _______ , and quicker, if detritus is rich in _____ and water-soluble substances like ______-.
lignin and chitin
nitrogen , sugars
Of the incident solar radiation less
than ____ percent of it is photosynthetically active radiation (PAR).
50
Plants capture only _____ per cent of the PAR
2-10
Common primary consumer in aquatic ecosystems
molluscs
In an aquatic ecosystem, ___ is the major conduit for energy flow.
GFC
Each trophic level has a certain mass of living material at a particular time called as the __________.
The amount of nutrients, such as carbon, nitrogen, phosphorus, calcium, etc.,
present in the soil at any given time, is referred to as the
standing crop
standing state
What’s the price tag Robert Constanza gave ecosystem services
33 trillion dollars per year
Out of the total cost of various ecosystem services, the soil formation accounts for about ____ percent, and contributions of other services like recreation and nutrient cycling, are less than ____ percent each. The cost of climate regulation and habitat for wildlife are about ___ percent each.
50
10
6
