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An investigation in to how Light intensity effects plant biodiversity.

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  • Essay length: 1182 words
  • Submitted: 25/03/2004
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GCSE Green Plants as Organisms

The first 200 words of this essay...

An investigation in to how Light intensity effects plant biodiversity.

Abstract

An investigation as to the effects of light intensity on plant biodiversity. My hypothesis stated that as light intensity increases, so does plant biodiversity. I investigated this through a practical case study of Hounslow Heath, using quadrats and a light meter to measure light intensity. The investigation proved my hypothesis to be correct.

Hypothesis

As light intensity increases, so does plant biodiversity

Variables:

* CO2 in atmosphere

* O2 in atmosphere

* Salinity of soil

* Soil moisture

* pH level of soil

* Nutrient content of soil

* Interspecific competition

* Temperature

* Humidity

* Light intensity

CO2

Carboxylation reactions occur in the light independent part of photosynthesis in order to produce organic compounds. Carbon dioxide is therefore essential to a plant. Atmospheric air contains carbon dioxide at a partial pressure of approximately 0.04 kPa and it if for this reason that carbon dioxide is often a limiting factor. However a partial pressures of >1.0kPa, CO2 can potentially damage plants.

O2

O2 is required for plant respiration; it is

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