Temperate Grassland  Temperatures in the winter often fall below –10ºC, while summers may be very hot, approaching 30ºC, and summer droughts are not uncommon.  Annual rainfall is generally between 25 and 100 cm, too low to support a forest but higher than that in deserts.  Prairie soils are among the richest in the world, having a nutrient content much greater than that of a typical forest soil.

TLS Online TPP Program

#Id: 1874

#Unit 10. Ecological Principles

α12>1 Species 2 have a greater inhibitory effect on individuals of species 1 than do the species 1 individuals themselves.

TLS Online TPP Program

#Id: 1875

#Unit 10. Ecological Principles

K1<K2/β  and K1/α<K2 - Species 1 goes extinct

TLS Online TPP Program

#Id: 1876

#Unit 10. Ecological Principles

K1>K2/β  and K1/α>K2- Species 2 goes extinct

TLS Online TPP Program

#Id: 1877

#Unit 10. Ecological Principles

K1>K2/β  and K1/α<K2- Either species 1 or species 2 goes extinct, depending on the initial densities.

TLS Online TPP Program

#Id: 1878

#Unit 10. Ecological Principles

K1<K2/β  and K1/α>K2- The two species coexist.

TLS Online TPP Program

#Id: 1880

#Unit 10. Ecological Principles

The superior competitor hypothesis suggests invasives are more efficient users of natural resources than natives.