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infection: (i) EIDs associated with a jump from domestic to wildlife populations living nearby; (ii) those connected with direct ...
The decline in finch population caused by the disease was proportional to the initial density of finches, with the result that 3 ...
As more research on parasites is carried out we are becoming aware of the role of parasites in structuring the diversity and abu ...
Myxomatosis was introduced to rabbits in England in 1953. It caused severe mortality of rabbits and resulted in several indirect ...
opportunities for parasites. For example, the knee worm (Pelecitus roemeri) has been “captured” by the wallabies and kangaroos f ...
The species jumping process may also operate the other way, with wildlife acting as reservoirs of parasites and pathogens transm ...
founder animals to a crisis situation with related animals, a poor sex ratio, and few mature, experienced breeder males.” Captiv ...
produced a generalized disease that is almost always lethal. Myxomatosis was deliberately introduced into Australia in 1950 and ...
12 Consumer–resource dynamics In this chapter we explore those things an animal needs to eat to survive and reproduce: resources ...
To complete the classification, there may be an interactive relationshipbetween the population and the resource in that the leve ...
predators are presumed to increase and level off according to Holling’s (1959) Type II functional response (see Chapter 10). Dep ...
There are some useful additional lines displayed in the phase-plane diagram shown in Fig. 12.2: the null isoclines (sometimes te ...
diminished risk of death, which imparts a positive, rather than negative, feedback on population dynamics. When the carrying cap ...
the growth increment. Hence, the rate of plant growth is influenced by both rainfall and plant biomass at the beginning of the p ...
202 Chapter 12 100 80 60 40 20 (^00100200300400) Vegetation biomass (kg / ha) Consumption rate (kg /3 months) 500 600 Fig. 12.5F ...
force that rate higher. The numerical response differs from the functional response in that negative values are both possible an ...
where ∆is the growth increment to ungrazed plant standing crop in kg / ha over 3 months, Vis the plant standing crop in kg / ha ...
when NI=∆. We can rearrange terms to isolate kangaroo density on the left-hand side of the equation, N=∆/I. Both null isoclines ...
The rainfall of this region takes the form of high-amplitude, high-frequency fluctu- ations (Fig. 12.8). The herb layer, whether ...
Few natural systems have been studied in sufficient detail to supply all the neces- sary parameters that we observed in the Aust ...
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