Landscape Ecology  A.  From a trophic food web/energy flow perspective, why are larger reserves “better?” (3pts)

Which of the following would be most suited for some degree of human activity, such as selective logging?

Three examples of associations in nature include: 1) Sea anemones riding on the backs of hermit crabs where the two species protect each other from their different enemies; 2) Lactobacillus bacteria living inside the human gut, having a beneficial effect on human health; and 3) Leaf-cutting ants farming and feeding on specific fungi, which receive free food and protection. How can these three associations best be classified?

The term “r-selection” refers to selection

An earthworm eats primarily detritus. A robin that then eats the earthworm is operating on a trophic level _______ that of a rabbit that eats grass.

Consider the salmon example from class that followed the flow of nutrients from the marine system to the terrestrial system in the Pacific Northwest. In this example salmon feeding in marine environments redeposited nutrients into a freshwater system.  If plants use CO2 for biomass and chemical energy, why is N addition from salmon important for Annual Net Primary Productivity (ANPP) (3pts)

Nutrient Cycling  B.  Resource pulses are occasional events of ephemeral resource superabundance that occur in many ecosystems. Herbivores, like the 17-year periodical cicadas, can have enormous impacts on the growth and reproduction in forest plants. In their immature forms they feed primarily on roots belowground biomass. What types of statistical analysis would you use to the difference in % Leaf N (Figure 7)? (2pts)

Which statement accurately describes a way plants allocate carbon that is not used in respiration?

The vast majority of a tree’s mass is made of carbon-containing molecules (organic carbon). Where does this carbon come from?

There are 80 swamp sparrows in a 20-hectare section of Mount Meadow. The average population density of sparrows at this site is _______ per hectare.