Allometric equation

Why is the Allometric equation important to us?

Allometric relationships often are used to estimate difficult tree measurements, such as volume, from an easily measured attribute such as diameter at breast height (DBH). Also when developing this equation one must play in factors which affect tree growth such as age, species, site location, etc.

How is above ground biomass calculated?

Another way of estimating the above-ground forest biomass by non-destructive method is by climbing the tree to measure the various parts [27] or by simply measuring the diameter at breast height, height of the tree, volume of the tree and wood density [14] and calculate the biomass using allometric equations [28-30].

What is tree biomass?

Biomass is a measure of biological matter, customarily expressed in weight. Tree biomass may be that of a single individual or all individuals occupying a unit of area. Since trees have a substantial moisture content (Chapter 1), weights may be either with (i.e., green) or without (i.e., oven-dry) moisture.

What is Allometric growth?

allometric growth The regular and systematic pattern of growth such that the mass or size of any organ or part of a body can be expressed in relation to the total mass or size of the entire organism according to the allometric equation: Y = bx α, where Y = mass of the organ, x = mass of the organism, α = growth

What does Allometric mean?

Allometry, in its broadest sense, describes how the characteristics of living creatures change with size. The term originally referred to the scaling relationship between the size of a body part and the size of the body as a whole, as both grow during development.

What is the formula for calculating biomass?

Biomass is really an expression of net change – because there can be significant changes to the biomass within the designated time period. The calculation is defined as: biomass(net) = increase biomass(gross) — decrease biomass(gross).

What is aboveground biomass?

Biomass is often defined in dry weight terms. Aboveground tree biomass, for example, refers to the weight of that portion of the tree found above the ground surface, when oven-dried until a constant weight is reached.

What is below ground biomass?

Below-ground biomass is defined as the entire biomass of all live roots, although fine roots less than 2 mm in diameter are often excluded because these cannot easily be distinguished empirically from soil organic matter.

What are 5 types of biomass?

We use four types of biomass today—wood and agricultural products,solid waste, landfill gas and biogas, and alcohol fuels (like Ethanol or Biodiesel). Most biomass used today is home grown energy. Wood—logs, chips, bark, and sawdust—accounts for about 44 percent of biomass energy.

What is biomass and how is it measured?

Biomass (B) is a measurement of how much living tissue mass for a population is present at one instant in time (or averaged over several periods of time), and its units are mass (or energy) per unit area (e.g., g/m2) (Benke 1993).

What is biomass and example?

Biomass is a collective term for all plant and animal material. A number of different forms of biomass can be burned or digested to produce energy. Examples of biomass include wood, straw, poultry litter and energy crops such as willow and poplar grown on short rotation coppice and miscanthus.

What is isometric growth?

Isometric growth is the exact opposite of allometric growth. ‘Isometric’ comes from the Greek for same measure. When isometric growth occurs, the proportions of the organism stay relatively the same; the mature organism looks like a bigger version of the young version of the organism.

What is Allometric analysis?

Allometry often studies shape differences in terms of ratios of the objects’ dimensions. Two objects of different size, but common shape, will have their dimensions in the same ratio. Comparisons of species are used to examine interspecific or evolutionary allometry (see also: Phylogenetic comparative methods).

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