Question

Which of the following question is most appropriate to an investigation at the landscape level?

What is the effect of diminished resources on an individual's life span?

How long does it take for carbon to be cycled from the atmosphere into living tissue?

What is the relationship between resource availability and birthrate?

Which factors give rise to the spatial extent and arrangement of the various ecosystems?

Answer 1

1. The major problem with merely increasing life expectancy is that it also increases morbidity simply because people live long enough to get more age-related disease, disability, dementia and dysfunction. Many serious diseases have increased prevalence with age, including cancer, heart disease, stroke, respiratory disease, kidney disease, dementia, arthritis and osteoporosisGiven the increasing prevalence of multiple disease, disabilities, dementias and dysfunctions at high age, it is not obvious that just extending lifespan beyond 90 years of age is a worthwhile undertaking.

2.The residence time of carbon varies widely among different reservoirs. On average a carbon atom spends about 5 years in the atmosphere, 10 years interrestrial vegetation, and 380 years inintermediate and deep ocean waters.Carbon can remain locked up in ocean sediments or fossil fuel deposits for millions of years.

3.State the relationship between an increase in human population growth and the availability of natural resources. An increase in human population growth means there is an increased need for natural resources to supply the basic needs of the population.Not only the number of people, but also the lifestyle, consumption patterns, and regions people inhabit and use directly affect the environment. The relationship between population growth and environmental degradation may appear to be rather straightforward. More people demand more resources and generate more waste.

4.Spatial ecology studies the ultimate distributional or spatial unit occupied by a species. In a particular habitat shared by several species, each of the species is usually confined to its own microhabitat or spatial niche because two species in the same general territory cannot usually occupy the same ecologicalniche for any significant length of time.