A population is defined asa group of individuals of the same species living and interbreeding within a given area. ... As a tool for objectively studying populations, population ecologists rely on a series of statistical measures, known as demographic parameters, to describe that population (Lebre...
Logistic growth is commonly observed in nature as well as in the laboratory (Figure 6), but ecologists have observed that the size of many populations fluctuates over time rather than remaining constant as logistic growth predicts. Fluctuating populations generally exhibit a period of population growth...
Building Blocks for Population Ecologistsmissing an axis label (though it was easily understood), one caption missing an explanation Eachis introduced with well designed questions that link the mod- els to broad It includes moreinformation on topics such as Amazonia, freshwater fishes, ethnobotany, ...
Ecologists measure characteristics of populations: size, density, dispersion pattern, age structure, and sex ratio. Life tables are useful to calculate life expectancies of individual population members. Survivorship curves show the number of individuals surviving at each age interval plotted versus time....
Population ecology is a very interesting subject to ecologists as it helps them understand the role of various ecological factors on population traits like preferences, population numbers, migrations, etc. The size of populations fluctuates with several environmental factors like air, water, sunlight, ...
Population ecologists have hypothesized that suites of characteristics may evolve in species that lead to particular adaptations to their environments. These adaptations impact the kind of population growth their species experience. Life history characteristics such as birth rates, age at first reproduction...
According to ecologists, life-history traits of organisms have evolved in relation to the constraints imposed by the abiotic and biotic components, in relation to the pressure imposed by both biotic and abiotic factors which exist in the surrounding environment or habit of that particular organism. ...
“Anthropocenists (by that I mean the vast majority of ecologists who are concerned about the repercussions of human activity) propose that if we have the technology to so damage the planet, why can’t we turn technology to its healing? Hi-tech geo-engineering such as air cleaning plants,...
the number of individuals of a species per unit area or volume Examples of population density include the number of oak trees per square kilometer in a forest or the number of earthworms per cubic meter in forest soil Ecologists use a variety of sampling techniques to estimate population ...
B. Population ecologists care about the future of humanity. C. The growth of the human population is a major concern. D. Population ecology does not consider humans worthy of study. 2 According to the passage, which factor might cause the population of a species to decrease in size?