Environment Science

a )Nt N0 (ert ) whereNt Population at time t 2006 6 billionN0 Starting universe size 6 billion humansr inbuilt Rate of Natural Increase 1t Time 46 yearsNt nation at 2005 humansbThe recent advances in medicine public wellness and hygiene have lowered the death rate of Sweden . in addition , the birth rate is controlled by elbow room of public sentiency , education and family planningc ) Ecological Footprint is a resource charge tool that measures how much land and water argona a human population requires to produce the resources it consumes and to absorb its wastes under prevail technology . It is the amount of productive land area inevitable to sustain ane persond The ecological foot print of the universe today is approximated to be 5 earths .We maintain this overshoot by liquidating the planet s ecological resourcese ) World population and footprint 6B 2 .3 ha /person or 5 earthsCurrent U .S population and footprint0 .28B 9 .7 ha /personRest of the world 5 .72B 4 .85 ha /person (9 .7 /20 .28 /6 0 .046667 9 .7 0 .452667 5 .07633 5 11 .03551 earths5 .72 /6 0 .953333 4 .85 4 .623667 2 .35 .07633 ha /person2 . Evolution and ecologya ) One of the roughly misunderstood terms is the phrase survival of the fittest . Literally translated , it subject matter survival of the survivors , a meaningless statement in the biologic sense . Survival of the fittest in the biological sense means that only those fit enough to be able to purge can ensure the continuity of their species . Those unfit , those who die earlier they can pass on their genetic data forget ultimately cease to exist . A very intimately example of this is in the peacock s tail feathers These tail feathers are brightly colored , hereby decreasing their chances of survival .

til now , the main purpose of these feathers is to attract prospective mates , increase their chances to reproduce and ensuring the continuity of their lineb ) Trophic level is the position an organism holds in the food chain or web . In a simplified ecosystem composed of food shrubs , rabbits , and lynxes , we can find three trophic levels . First is the foundation species , the primal maker or autotroph which produces energy thru conversion of environment factors , in this case the food shrub . Feeding upon the food shrub are the rabbits , belonging to the second trophic level . The rabbits are heterotrophs considered to be the primary consumers since they obtain energy or persist upon the primary producer The lynxes belong to the third trophic level . They are also heterotrophs that are secondary consumers , feeding upon the primary consumers , which in this case are the rabbitsd )The lynxes and rabbits belong to a predator prey relationship Predators and prey can influence one another s evolution . The resulting pattern follows the Lotka-Volterra model developed individually by Alfred Lotka and Vito Volterra in the 1920 s . This model shows that both predator and...If you neediness to get a full essay, order it on our website: Orderessay

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