Experiments L3

Question 1

Explain Schindler’s whole lake experiments.

Answer 1

He added phosphorous and nitrogen to lakes. It caused a large increase in phytoplankton and destroyed the ecosystem! (Eutrophication).

Question 2

What sis Petchey et al., discover?

Answer 2

Species higher up in the foodweb were more prone to extinction in protist-bacterial assemblages. And extinction rates were higher with warming.

Question 3

What did Flores et al., 2016 discover?

Answer 3

1) Habitat complexity can influence predation rates by providing refuge.
2) Treatments with structure showed higher FPOM production and lower pH most likely due to higher digestion and respiration with structures present

Question 4

What were the predictors of the Flores et al., 2016 experiment?

Answer 4

1) Structure absent vs structure present
2) Amount of structure added (2 vs 3 rings)
3) Habitat complexity measured as fractal dimension

Question 5

What were the responses of the Flores et al., 2016 experiment?

Answer 5

1) Leaf mass loss
2) FPOM
3) pH