ecosystems qp1 Flashcards

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1
Q

how do u calculate percentage efficiency from proucers and herbivores

A

-producers collected
-primary consumers collected
-collected from the same area
-measure biomass/ drymass of individual or population
-energy content calculated of producer and herbivore
-use of caliormeter
-primary consumer energy/ producer energy x 100

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2
Q

what are two examples why ecosystems are dynamic

A

-nnumber/ abundance varies from year t year
-as vegeation changes/ sucession occurs this changes numbers

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3
Q

suggest why bodies are not decomposed in peat bogs

A

soil bacteria/ fungi/ microbes cant survive
-decomposers not present/ active
-water logging reduces air/ oxygen
-acidity/ low pH stops decaying enzymes from working

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4
Q

why is large scale removal of peat bogs not encouraged

A

-bog habitat/ ecosystem takes a long time to form/ hard to replace
-loss of biodiversity/ rare species

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