Equations discussed in Chapters 54 – 57: * = multiplication…

Equations discussed in Chapters 54 – 57: * = multiplication sign dn/dt = B – D dn/dt = b*N – d*N r = (b-d) dn/dt = r*N dn/dt = r*N * ((K-N)/K) Ro = sum (lx * mx) Nt = No * Rot r*B > C Ppersist = 1−E+(M*(1−E)) Pregional = 1−(Pextinct A * Pextinct B * Pextinct C * Pextinct D) Where Pextinct = 1−Ppersist lx = nx/no Nt+1 = Nt*Ro Nt = No*Rot

Briefly explain the phenomenon of territoriality and provide…

Briefly explain the phenomenon of territoriality and provide an example of a signal an animal can use to designate a territory. Then explain one advantage and one disadvantage to the organism maintaining a territory.  Finally, explain how territorial behavior typically influences population dispersion at the landscape level. 

A) A team of ecologists is studying a population of snails i…

A) A team of ecologists is studying a population of snails in a marsh. During the first sampling, they capture and mark 120 snails before releasing them back into the population. A week later, they recapture 150 snails, 30 of which are marked. Calculate the size of the snail population. (Need to show calculations to receive full credit). B) After carefully observing the recaptured animals, the researchers discovered that 10% of the marked snails actually lost their marks during the study period. Adjust the population estimate to account for this mark loss. Hint: The true number of marked snails in the second sample (R′) can be recalculated as: R′=R/(1−Mark Loss Rate). (Need to show calculations to receive full credit).

A metapopulation of frogs is distributed across five ponds….

A metapopulation of frogs is distributed across five ponds. Data on local extinctions and recolonizations are presented below: Pond Local Extinction Events (5 years) Recolonization Events (5 years) 1 2 2 2 3 1 3 0 0 4 5 4 5 1 1 Which pond is most at risk of permanent extinction and why?