Biomass- Pyramid

Biomass Pyramid- A diagrammatic representation of the amount of organic material (see biomass), measured in grams of dry mass per square metre (g m–2), found in a particular habitat at ascending trophic levels of a food chain. Biomass decreases at each ascending level of the food chain. A pyramid of biomass is a more accurate representation of the flow of energy through a food chain than a pyramid of numbers, but seasonal variations in the rate of turnover of the organisms at a particular level may result in higher or lower values for the amount of biomass sampled at a particular time than the average amount over the whole year. The best representation of energy flow in a food chain is a pyramid of energy.

A Dictionary of Biology
© A Dictionary of Biology 2004, originally published by Oxford University Press 2004.



Understanding The Complexities Of The Biomass Pyramid
Biomass has been hailed as the energy source of the future. What it provides is no more dependence on fossil fuels, contamination-free air from emissions, and is a simple and inexpensive renewable energy source. What a wonderful concept for the future of humankind. Intense studies of this possibility are being held using the Biomass Pyramid to trace the most beneficial time to tap this energy.

To understand this phenomenon it needs to be realized that the planet’s entire ecosystem…>>

Energy and Food
<<enlarge graphic  BIOMASS- PYRAMID RICE EDU
Credit: Dylan Prentiss, Department of Geography, University of California, Santa Barbara
… However, between the stage of the primary producer (grain) to the cattle (herbivore), 90% of the energy supplied by the grain is lost in the raising of the cows. From the cattle to the humans, the same efficiency also holds; just 10% of the energy stored in the beef is passed on to people. But if the grain were directly fed to people, the amount of energy that would have been used (and wasted) by cattle would be used by people, essentially “saving” a great deal of available energy and biomass. This concept is particularly important in…>>

A “food chain” can be defined as a simple, linear relationship of food sources in a given environment. But in most situations, biologists see examples in nature where the interchange of food sources do not follow such a simple arrangement. Instead, an organism may be observed to hunt, kill and consume smaller animals, feed on a larger animal in a group the next day, or eat plants (such as fruits or leaves) many days later. In other words, many animals eat different kinds of..>>  

Don’t Forget The Parasites! Reevaluating The Pyramid Of Numbers By Hannah Waters | July 26, 2011

…where would you stick a parasite in a pyramid of numbers? Feather lice, for example, live in the feathers of birds. If they are sucking the blood of a hawk, does that make them higher on the food chain than the hawk? Are they at a greater trophic level, despite being as small as they are? Does parasitism count as predation?…

The Eaten Outpace The Eaters In Biomass Pyramid
 By: Paul Katula |Sep 4, 2015

Ecosystems have a carrying capacity, the maximum biomass each trophic level can support given finite resources. Here’s the pattern….>>

BIOMASS- PYRAMID GREEN TRIANGLE   The name of the pyramid biomass comes from the fact that it is represented in the pyramid form. Their energy capacity is usually concentrated at the base, which is represented as being wide and decreases as one move up to the apex. The pyramid is used as a manner of clarifying the movement of the biomass as well as the energy through the ecosystem…>>

Biomass vs. Energy Pyramids
 by Ellie Maclin | Updated April 25, 2017
Biomass pyramids and energy pyramids are two types of ecological “infographics” used by scientists to represent the relationships among elements in a food chain. Scientists can use these kinds of biological pyramids to determine the health of plant and animal populations by using pictures to represent concrete measurements of an ecosystem’s parts….

by Saritha Pujari
Ecological Pyramids Are Of Three General Types Namely:
(i) Pyramid of numbers, showing the number of individual organisms at each level
(ii) Pyramid of biomass, showing the total dry weight and other suitable measure of the total amount of living matter, and
(iii) Pyramid of energy, showing the rate of energy flow and/or productivity at successive trophic levels.

…The pyramids of numbers and biomass may be upright or inverted depending upon the nature of the food chain in the particular ecosystem, whereas pyramids of energy are always upright…>>
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BIOMASS- PYRAMID INVERTED                                        

Pyramid Of Energy
4 Functional Aspects Of An Ecosystem-  by Puja Mondal
Some of the important functions of an ecosystem are as follows:
– Energy flow in an ecosystem
– Food chain, food web and ecological pyramid
Biogeochemical cycles
Ecological succession.

(iii) Pyramid of Energy: The most ideal and fundamental method of representing the relationships between organisms in different trophic levels is the pyramid of energy. We know that in every ecosystem,…>>
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