In one case, the removal of the predator increased the competitively dominant species and in the other example, the removal of a predator increased weaker competitors. Which had a larger effect on the overall community structure? [ Select ] When the removal of one species has a disproportionally large effect relative to its abundance, we call this a keystone species. Which species was the keystone species? [ Select ]

Insect communities were surveyed in either the high or low canopy of a tropical forest. The community data are displayed in the table below. In which habitat was there higher species diversity? Low Canopy_ High Canopy Species Abundance P, P, In P, Species Abundance Pi P, In P 1 45 0.45 -0.36 1 50 0.50 -0.35 35 0.35 -0.37 2 25 0.25 - 0.35 20 0.20 -0.32 3 25 0.25 - 0.35 Total 3 100 1.0 3 100 1.0 O a. cannot be determined with the available data O b. high canopy O c. high and low canopy have the same species diversity O d. low canopy has a higher species richness Oe. low canopy

A keystone species is not necessarily abundant in a community but has a large impact on surrounding species and community structure. True O False

In a competitive interaction in which species A has a lower carrying capacity (KA) than species B (KB), it is expected that species ____________________ will go extinct.

According to the resource-ratio hypothesis (a.k.a. R-star), what factor(s) will determine the maximum number of competing species that could possibly coexist in a community? (Note: either one or more-than-one answer could be correct) .what does the number of limiting resources in a community tell us? The number of limiting resources in the community The net primary productivity of the community (NPP). The number of trophic levels that are present in the community. | The intrinsic rate of increase (r) of each species in the community. The colonization rate of each species that can access the habitat.

The population size of a species capable of being supported by the environment is called its ________. a. limit b. carrying capacity c. biotic potential d. logistic growth pattern

When r is a positive number, the population size is (a) stable (b) increasing (c) decreasing (d) either increasing or decreasing, depending on interference competition (e) either increasing or stable, depending on whether the species is semelparous

The _______________ signifies that species richness is greater where two communities meet than at the center of either community. (a) edge effect (b) fundamental niche (c) character displacement (d) realized niche (e) limiting resource

Would you classify these species as weak, moderate, or strong competitors? Explain. Think about population density. Compute the population density if necessary.

use the interaction strength equation (ecology):   ln (C/E)/I