Test the following two hypothesises, "Trees modify their environment" and "Differences in woodland ecosystem are the result of different management strategies".

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Geography Coursework

Introduction

The aim of this coursework is to test the following two hypothesises, which are:

“Trees modify their environment”

and

“Differences in woodland ecosystem are the result of different management strategies”.

The place where I gathered my information was Bishops Wood country park, which is located 1km west of Northwood at the Hertfordshire border 5km south of Rickmansworth. The majority of the wood is surrounded by farmland it is bordered on two sides by Shrubs road and Harefield road.

The land is a gentle sloping valley running east to west. The size of the land is 38.8 hectares, it is approximately 95m above sea level. On the attached grid, you can see Bishop’s Wood at grid reference 06.91.

When I arrived at Bishop’s Wood, we gathered all our equipment together to begin the experiment. Which is listed below:

  • Twelve meter transect
  • Quadrat
  • Soil testing kit
  • Barium sulphate
  • Universal indicator
  • Distilled water
  • PH identification chart
  • Light meter
  • Soil moisture meter
  • Thermometer

Method

I started my experiment in the deciduous woodland, we laid a twelve metre transact across a deciduous path ensuring that it was straight to prevent incorrect results. We than laid a half metre quadrat, and placed it at 0 metres. we then looked inside the quadrat and worked the percentages of what we saw inside the quadrat. We repeated this by using the half metre quadrat for the 4m, 8m and 12m. As before, we worked out the percentages of what we saw in each of the quadrats, all the percentages resulted in being over 100 percent as expected.  

Afterwards we worked out the soil pH, this was done this by putting a spatula of soil in a test tube and then adding barium sulphate, a universal indicator and some distilled water. It was then shaken, and left for two minutes. While we waited, we saw a slight colour change in the tube, a pH identification chart was used to find out what the soil pH level was.

We then worked out the soil moisture; we did this by using the soil moisture testing, we got the soil moisture meter and dug it into the soil and it gave us a soil moisture reading. We soil test the temperature we did this bye holding the thermometer in the air and waited till it stopped moving. We also worked out the light reading by using a light meter, this was done by pointing the light meter up in the air.

Our next task was to work out the ages of the trees, this was done by measuring 1.5metres from the ground, and then calculating the circumference of the tree. This was repeated on 10 different trees.

The above procedure was then repeated in a coniferous woodland and path.

The writing

My first hypothesis I am going to investigate is:

“ Where there are trees the temperature will be lower, there will be less light, less soil moisture and different soil pH and fewer plants will be growing on the ground cover. ”

I think that where there are trees the temperature will be lower because all the trees intercept the sunlight and heat so the temperature will lower. Also as there is less light the temperature will also be lower. As there will be less light, the temperature will be lower as the sun gives energy to the earth, which then becomes heat. There will be less soil moisture as the canopy will act as an umbrella and intercept the rain so that it does not reach the ground. The rain will be evaporated from the leaves of the tree into the atmosphere. As a result of this, there will not be very much plant, growing, as they need sunlight, water and carbon dioxide for photosynthesis to take place.

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In this piece of writhing I am going to describe I am going to describe transects in a deciduous wood. Looking at my pie chart’s of a deciduous wood on page ____. I found dead bracken in two of the four quadrats ranging from 100% -130%. There was dry bracken in two of the four quadrats ranging up to 90%-100%. I also found small and big twigs in 80% in 0 meters, 30% in 8 metres and 30% - 40% In quadract four 12 meters. I also found acorn in all four quadrats roaming from 20% - 40%. ...

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