• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Why is pyramid of biomass important in illustration than pyramid of numbers?

Extracts from this document...

Introduction

Task - Providing information about biomass; two examples of studies or research into biomass. Why is pyramid of biomass important in illustration than pyramid of numbers? Information about biomass - A biomass is a measure of the amount of living material present such as the biomass of plants in a rainforest or of worms in the soil. Biomass is expressed in units such as gm-2. These units reflect both the mass and the size of the sample. Because the amount of water in living organisms is very variable, samples are often dried, in which case the term dry biomass is used. It is not essential, however, to use dry biomass. ...read more.

Middle

Source : http://earth.rice.edu/mtpe/bio/biosphere/topics/energy/40_biomass.html The energy flow between levels It is also useful to think of the food producers and consumers as part of a "biomass pyramid," in which the comparative masses of consumers and food can be represented simultaneously. Instead of energy, the approximate masses of the animals and plants involved are "stacked up" in pyramidal fashion, with the primary producers (plants) at the bottom, and the last (generally largest) carnivore in the "food chain" at the top. The poor energy-transfer efficiency from one trophic level to the next manifests itself by the end of the chain, where a mere one-hundredth of a percent of the "base" of the pyramid remains. ...read more.

Conclusion

by cattle would be used by people, essentially "saving" a great deal of available energy and biomass. This concept is particularly important in international food organizations, as world population continues to increase, and the difficulty of properly feeding everyone becomes more crucial. By "skipping over" levels of the biomass pyramid, less energy is wasted, and more available energy - food - becomes accessible to humans. A period of biomass is more accurate because the pyramid will continually shrink as it rises from Producers to Primary Predators because the overall mass of the total group will continue to decrease. In a pyramid based on numbers, there could be an increase in the pyramid as it goes up because one group of plankton which eats photosynthetic plankton could be more numerous, but weigh less. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Energy, Respiration & the Environment section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Here's what a teacher thought of this essay


** Some useful information about pyramids of biomass and useful definitions, but no research discussed

Marked by teacher kerry Jackson 27/03/2012

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Energy, Respiration & the Environment essays

  1. Marked by a teacher

    effect of temperature on the rate of respiration in yeast

    5 star(s)

    Indicator: methylene blue Volume of indicator: 0.5 ml Volume of yeast: 10.0 ml Temperature: 20 - 60 oC Choice of technique: Why have I chosen methylene blue over TTC? This is because TTC is more time consuming then methylene blue when the experiment reaches its end point.

  2. Marked by a teacher

    An investigation into the effect of different sugars on respiration in yeast.

    5 star(s)

    I had planned that the boiling tube would be continually agitated, however I then identified that there was no equipment which would deliver an equal level of agitation throughout the experiment. Consequently, this would produce too great a variable so I decided not to include any agitation during Preliminary 3.

  1. Marked by a teacher

    Effect of Anaerobic Respiration On Yeast

    5 star(s)

    However it is not a significant increase. This suggests that the enzymes are still not quite at their optimum temperature. However as was the case at 30�C there is an increase in energy which causes yet more collisions and allows the enzymes to work more efficiently.

  2. Cycles in Biology.

    Above the ocean and rain forests, water vapour gathers into clouds. Winds move the clouds of vapour. The clouds release their water in liquid precipitation (rain) or crystal precipitation (snow). The water runs off, or soaks into the ground, and eventually, some of it flows into the ocean, where the cycle is repeated.

  1. The Effects of Abiotic & Biotic Features on the Distribution of Plants and Animals ...

    Hydrophytes are those which are adapted to living in waterlogged or submerged conditions, xerophytes are those who are adapted to living in conditions with little water and finally mesophytes are those who are adapted to living in conditions where there is an adequate supply of water.

  2. How does the temperature of the water in rock pools affect the distribution of ...

    Feeding rates are affected by the temperature, and obviously the rate of feeding will affect whether or not the dog whelk can survive. Mussels are dangerous prey because they can snare or immobilise dog whelks with their byssi. In different temperatures different prey is available - or none at all.

  1. Vitamin C content in juice

    o Volume of DCPIP (1cm�) The independent variable will be controlled so the results will be reliable and valid and their impact will be minimised in the experiment. I will also run a control experiment with distilled water, to show that it is the Vitamin C that is decolourising the DCPIP and nothing else.

  2. Energy Flow through Ecosystems.

    Reflected by the leaf 2. Of the wrong wavelength to be absorbed by chlorophyll 3. Transmitted straight through the leaf 4. Consumed due to the process of photosynthesis 5. Lost by respiration Primary Consumers: Primary consumers are heterotropic; they obtain their nutrition by consuming other organisms.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work