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To collect and identify species of organisms and plants in an area of 1m2 in a pond.

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Introduction

Aneal Khakhar Biology-Block Week Pond Dipping Investigation Aim: To collect and identify species of organisms and plants in an area of 1m2 in a pond. Equipment: A Nets (x2) - For catching pond animals in Magnifier (x1) - Used to see small organisms in more detail Trays (x3) - Three trays used to put materials (organisms/matter) in, one for every stage i.e. top, middle and bottom parts of the leaf , but mainly for looking at the animals in. Spoons (x2) - used to take organisms out of trays Pipette (x1) - Used to take up small organisms Organism Identifier (x2) - To identify organisms to help gather information to put the species in some order (producer, primary consumer, secondary consumer) and to then put them into pyramids of numbers and biomass. ...read more.

Middle

This should be done for each stage until all organisms have been obtained. Next you must identify them, using the Organism identifier and microscope to establish what each organism is. You must then identify which organism is in which trophic level. After this you have to count and weigh the organisms. As there where only a few of each organism we decided to weigh all of them instead of weighing one as a representation, this making the investigation for drawing a pyramid of biomass fairer overall. After obtaining all of this it will then be possible to draw pyramids of numbers and pyramids of biomass to show your results. Results The results shown below are listed as they where obtained from each of the three layers (* not trophic level): Top Layer of pond: Boatman (x 1) ...read more.

Conclusion

was only an estimated field as we did not have any guidelines as to where the boundary stared/ended causing inaccuracy in the results. Also as we only took a sample on one small section of the pond it would be unrealistic to say that it was a representation for the whole pond. Also when we took the organisms out of the trays some may have been left uncounted for or alternatively too small to count. But from the results we did obtain it was possible to draw pyramids of numbers and biomass however inaccurate the results may have been. To further this investigation I would look at making the whole investigation a little more accurate than it actually was. I would do this by using different types of obtaining the organisms such as kick sampling. I would also look at what organisms live at varying oxygen levels or pollution levels. ...read more.

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