207) Early conservation, contrary to the modern idea of resource conservation had the goal of developing resources (or conserving them) exclusively for human use. (Worster, 2002, p
(Malthus 245) point well made by Crosby in his classic Ecological Imperialism (1986), that migration created an opening not only for the plow alone, but also for invasive grasses, grazers (domesticated animals) and dandelions. "The success of portmanteau biota and its dominant member, the European human, was a team effort by organisms that had evolved in conflict and cooperation over a long time" (Crosby 293)
Could we conceive an intelligent being, so placed, as to be conversant only with inanimate, or full grown objects, and never to have witnessed the process of vegetation or growth; and were ano- Malthus 244) ther being to shew him two little pieces of matter, a grain of wheat, and an acorn, to desire him to examine them, to analize them if he pleased, and endeavour to find out their properties and essences; and then to tell him, that however trifling these little bits of matter might appear to him, that they possessed such curious powers of selection, combination, arrangement, and almost of creation, that upon being put into the ground, they would chuse, amongst all the dirt and moisture that surrounded them, those parts which best suited their purpose, that they would collect and arrange these parts with wonderful taste, judgment, and execution, and would rise up into beautiful forms, scarcely in any respect analogous to the little bits of matter which were first placed in the earth. (Malthus 245) point well made by Crosby in his classic Ecological Imperialism (1986), that migration created an opening not only for the plow alone, but also for invasive grasses, grazers (domesticated animals) and dandelions
5% between 1850 and 1900 and rocketed up to 2.0% during the 1960s (Pimentel)
This has resulted in a drop of life expectancy from 61 years (in 1990) to 44 years (in 2000), and projected to drop to 39 years (in 2010). (Brown, 2000) This inability of poor, overpopulated countries to fight disease is threatening to push them back into the pre-industrial age societies where populations were kept stable by a high death rate rather than the control of the birth rate
This is especially true in underdeveloped countries where people live primarily by means of subsistence farming, gardening, herding, hunting, and gathering. (Corbett, Para on "Causes of Poverty") For example, in sub-Saharan Africa even large areas of land can support only small numbers of people
Predation, particularly by humans, also becomes an issue as the birds infest private hayfields along the St. Lawrence River in search of food (Batt, 1998)
Population Growth Dynamics Define exponential and logistic growth patterns. How are they similar? How are they different? Exponential growth rate is said to exist when the rate of growth is proportional or equal to the existing amount, such that the larger the existing amount, the greater the growth rate (Gilewski & Norton, 2008)
Both biotic and abiotic factors work to restrict the size of the population to ensure that the carrying capacity is not surpassed. Abiotic factors such as oxygen shortages and water pollutants, for instance, limit the size of aquatic species by causing the intolerant ones to die such that the numbers left are enough to be sufficiently supported by the existing oxygen levels (Williams, 2000)