Ecology Ch 3 Communities, Biomes and Ecosystems

The main abiotic distinction between temperate grassland and tropical savanna is temperature, not rainfall.

• True

• False

The niche of an organism is used to define its aggressiveness in conflicts.

• True

• False

Lichens make good pioneer species because they can secrete acid that breaks down rock.

• True

• False

The colonization of the stone walls of a building by mosses and lichens is classified as secondary succession.

• True

• False

Primary succession is the most rapid form of succession because soil (and usually a few species) are already established.

• True

• False

If lake turnover did not occur, the profundal region would experience a shortage of nutrients.

• True

• False

A plausible hypothesis for the fact that mostly consumers live in marine abyssal zones and benthic zones is that temperature is a limiting factor.

• True

• False

The discovery of communities in marine abyssal zones devoid of light supports the conclusion that some consumers can trap energy without needing to photosynthesize.

• True

• False

Herd animals are usually concentrated in the forest biome.

• True

• False

A pioneer community is usually the stable result of succession.

• True

• False