Titlebook: Ecological Methods; With Particular Refe T. R. E. Southwood Book 1978 T. R. E. Southwood 1978 biomass.biome.ecology.ecosystem.energy.fauna.

砍伐

The Estimation of Productivity and the Construction of Energy Budgets, or energy content, as well as in numbers. Biomass and energy are useful to ecologists in that they provide a common unit for the description of populations of animals and plants of different sizes. Descriptions of the predator in these terms are often essential in studies on the effect of insect pr

混沌

猛然一拉

somnambulism

Absolute Population Estimates using Marking Techniques,sessment of the number of sampling units in the habitat and, as has already been stressed (Chapter 1), it is a wise practice to use more than one method simultaneously. There are also certain other methods of estimating a population that depend on the presence of marked individuals, but use a differ

上下连贯

The Construction, Description and Analysis of Age-specific Life-tables,tudy of human populations are also those of greatest significance to the animal ecologist. Because many insects have discrete generations and their populations are not stationary, the age-specific life-table is more widely applicable than the timespecific life-table.