ecosystems qp1

Question 1

how do u calculate percentage efficiency from proucers and herbivores

Answer 1

-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

Question 2

what are two examples why ecosystems are dynamic

Answer 2

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

Question 3

suggest why bodies are not decomposed in peat bogs

Answer 3

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

Question 4

why is large scale removal of peat bogs not encouraged

Answer 4

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