please solve number 30 28. Analyze the graph of the growth curve representing thehuman population of Ireland before 1900 (Figure 2).(a) Label the different phases of this growth curve.(b) Suggest possible reasons for the decline in car-rying capacity at time D.(c) Research the events that actually occurred inIreland before 1900 that led to this decline in car-that are carrying the bacteria Borrelia burgdorferi.Today, the only area in Ontario with a risk of Lyme dis-ease is Long Point on the shore of Lake Erie. ResearchLyme disease and answer the following:(a) Is Lyme disease a serious health concern? Justifyyour answer.(b) Is there a natural balance between predators andthe deer population of Long Point?(c) What strategies in both wildlife management andhuman behaviour might reduce the risk ofacquiring this disease?GOrying capacity.GOwww.science.nelson.cominitial carryingсарacitywww.science.nelson.com31. Some suggest that lakes without fish populations due toacid deposition can simply be stocked with young fish.(a) Who might be satisfied with this solution? Explain.(b) Explain why this action does not solve the problem.32. Great gray owls, Strix nebulosa, are very vulnerable tohuman disturbance such as clearing of forests fortimber or farmland. Their population dispersion andgeographic range are most affected by the availabilityof nest sites. Other factors such as food supply, influ-ence the carrying capacity of the local environment.These birds are top predators and feed heavily of miceand voles.new carryingсарacityATimeFigure 229. Examine the data in the table below which comparesCanadian population statistics for the periods1861–1871 and 1991-1996.(a) How might use of pesticides influence the healthof gray owl populations?(b) How could forestry practices be altered to limitnegative impacts on the range and dispersionpatterns of these owls?(c) Many environmental organizations advocatetaking action to ensure this and similar wildlifepopulations are given adequate protection. Whatreasons do you think these groups would offer insupport of their position? Explain.33. As water becomes scarce, the competition for waterbetween cities and countryside intensifies. In thiscompetition, farmers almost always lose. Thedemands for water use by people in cities must bybalanced by the needs for water used for irrigation.(a) What water uses would you consider essential forcity dwellers?(b) Outline several changes in lifestyle and/or tech-nologies that could be used to reduce waterdemand in homes and industries.(c) How might farmers reduce their water demands?Consider alternative irrigation technologies aswell as crop selection.Table 3 Canadian Population StatisticsPopulation Birthsat end ofperiod(1000's)Deaths(1000's)Immigrants Emigrants(1000's)(1000's)(1000's)1861-18713 6891 3707602604101991-1996 29 67219361 0241 137229(a) What was Canada's annual per capita birth anddeath rates in the period from 1861–1871?(b) How did these values change during the next 130years? Suggest reasons for these changes.(c) Calculate the annual percent growth rate forthese two time intervals.Making Connections30. Healthy, natural ecosystems play an important role incontrolling the emergence and spread of infectious dis-eases by maintaining a balance between predators andprey, and parasites and their hosts. The deer tick, Ixodesdammini, feeds on white-tailed deer and occasionallybites people. Lyme disease is spread by the bite of ticksNumber of Individuals

Question

Accepted Answer

Disease transmission
Infectious diseases can be transmitted from one person to another by physical…

(a) Is Lyme disease a serious health concern? Justify your answer. (b) Is there a natural balance between predators and the deer population of Long Point? (c) What strategies in both wildlife management and human behaviour might reduce the risk of acquiring this discase?