Question

A native species of earthworm (species 1) has an Imax of 0.5, and a carrying capacity of 50 worms per square meter of soil. An invasive introduced earthworm species (species 2) has an I'max of 0.0, and a carrying capacity of 100 (per square meter). The niches of these two earthworms overlap to some degree, such that a2i = 0.8 and a2 = 0.6. Which of the following equations best describes the population growth rate of the invasive species, when in competition with the native? [1] ar fibov bolo movies o 100-N.-.6N +) 100 ver and st o red od nigello stomo bil in morro aloqa uri or bottom od blow much (A.SN,(50-N --802 (B) N2 =.6N2(100-N2 --6N1) coram - sw, p50-, - my a 2 =.ow (100-N3 --W; @ "N 2 =.ON 21002 ) 100-N2 -8N1 Demob blow Didw ani bit Deuston blowite olitve 2013b blow s obod blues brust vers les oregandow on 100 este .5. What would the outcome of competition be after a long period of competition between these two species? [1] (A) The native would win, and the invasive would be excluded, (B) The invasive would win and the native would be excluded, (C) The two species would coexist. (D) The outcome would depend on the initial starting N's of each (E) The outcome cannot be predicted with the information given.

Answer 1

4.d

dN2/dt=.6N2(100-N2-.8N1/100)

All niche overlap measures show decreased bias as sample size goes up

5.two species would co-exist

Ecological niche means the total interaction of a species with its environment or its functional position or status in an ecosystem. Ecological niche depeds on the species structural adaptations, physical responses and behaviour. Niche overlap means that one or more resources are shared between two species