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

I will be comparing two ponds with different amount and variety of species in them. During this field trip the independent variable will be the different ponds (i.e. Peter's pond and Bay Pond) and the dependent variable

Extracts from this document...


Bay Pond Field Trip Investigation Planning: Aim: To compare the diversity and amount of organisms in two different ponds (Peter's Pond and Bay Pond). Variables: I will be comparing two ponds with different amount and variety of species in them. During this field trip the independent variable will be the different ponds (i.e. Peter's pond and Bay Pond) and the dependent variable will be the number of species and organisms in the two ponds. In addition, I will be looking at the pH, temperature, depth and the turbidity of the pond (the abiotic factors) to see whether these aspects have an effect on the presence of the organisms as I predict that there will be a relationship occurring. To make it a fair test, I will be performing the sweeps consistently, making sure that the technique that I use is constant so that it will be fair, I will also control the time, date and place (i.e. near reeds, in open water etc.) in which the procedure is taking place. Prediction: I predict that the pond with the lower turbidity will contain a wider diversity and broader amount of organisms than the pond with the higher level of turbidity. This is because as one pond has a higher level of turbidity, the murkier and dirtier the water is and this increases when there is a lot of solids in the water and in this case it is due to a large number of carp in the pond. When there are a lot of particles, then there is less light reaching the plants that need the light for photosynthesis, which means that there will be fewer herbivores as they can't make their own food. ...read more.


Also I found that it was less turbid in Peter's pond than it was in Bay Pond and theoretically they should be more herbivores in Peter's Pond than in Bay pond and my results prove this. This refers back to my prediction and proves that it was correct as I also mentioned in my prediction that the pond with the higher pH will have more herbivores due to vegetation removing carbon dioxide from the water and this makes the pH rise because carbon dioxide is acidic and so removing it will make the pond more alkaline but my results show that this is not the case for these ponds as in Peter's pond, it contains more herbivores but has a pH less than Bay Pond. Also I said that the higher the temperature, the less organisms that will be found because it slows down the rate of photosynthesis, and so less herbivores will be able to make their own food, and my results show this as Bay pond has less herbivores than in Peter's Pond. There are less detritivores in Bay pond than in Peter's pond but I do not think that this should have been the case as in theory; there should be more detritivores in Bay pond than in Peter's pond because of all the carp in Bay pond which are detritivores as they feed off all the dead matter at the bottom of the pond. And I see no other reason why it should be the other way round (i.e. more detritivores in Peter's pond than in Bay Pond) so therefore there must have been a systematic error during the procedure. ...read more.


I think that because of the measurements that we took were not reliable, I'm certain next time if I repeated the whole investigation again the way that I had planned it, and we would not get the same results that we have. Also I would definitely measure the abiotic factors at least twice to make sure that they are reliable as well. So based solely on my results and measurements, I would say that my conclusion is inaccurate and needs to be re-looked at a second time with a more suitable procedure. Further work that I could do to provide additional evidence for my conclusion would be to change some of the abiotic factors, for example the pH of the pond. I would like to see whether my prediction is correct by testing out a variety of pHs to see what would be the minimum pH and the maximum pH in which organisms would be able to survive in. This could apply to the temperature of the pond. Also as we were only situated in one part of the pond to perform the investigation, I would like to expand this range to see whether different results come up in different areas depending on the environment around - whether this has an effect on the organisms in the ponds. I think looking at all these factors, will help me to be more confident in the validity of my conclusion and make it more secure. And perhaps I would be able to see clearly any trends and patterns and be able to analyse them better. ?? ?? ?? ?? By Stephanie Liu (9W) ...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

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

    Biology coursework investigation: Comparing the length of ivy leaves (Hedera helix) in areas of ...

    4 star(s)

    Their ability to grow more than sun leaves is mainly due to the arrangement of the chloroplasts which are positioned in such a way as to absorb maximum light without shading other chloroplasts below them. This allows them to take advantage of any light that is exposed to them and make use of it in the most efficient way.

  2. Marked by a teacher

    To make sure we have plenty of energy in the future, it's up to ...

    4 star(s)

    These include solar, wind, geothermal and hydro. These types of energy are constantly being renewed or restored. But many of the other forms of energy we use in our homes and cars are not being replenished. Fossil fuels took millions of years to create. They cannot be made over night.

  1. Marked by a teacher

    'An investigation into the ability of two strains of the yeast Saccharomyces cerevisiae to ...

    4 star(s)

    Using a glass rod, thoroughly stir each of the solutions before any samples are removed for titration. This will help to ensure that the solutions are well mixed and all samples taken are of equal consistency, and contain a proportionate amount of all suspended/dissolved components.

  2. Marked by a teacher

    Find the relationship between amount of fat and amount of energy produced in different ...

    4 star(s)

    The only other measures of accuracy are letting the thermometer stabilise before the next experiment is carried out. Also, when using electronic scales, you must let them stabilise, before the food is taken off of them to ensure an accurate measure of weight.

  1. Field trip report Mangrove ecosystem

    It shows some of their important functions below: 1. Provide food for gastropods and animals e.g. fruits and leaves of Avicennia marina. 2. As Chinese medicine, e.g. the bark of Bruguiera gymnorrhiza to treat diarrhea and smoke generated from burning the wood of Excoecaria agallocha can treat leprosy and their leaves can treat epilepsy.

  2. An investigation into the distribution of adult and juvenile limpets on a rocky shoreline.

    One such factor could be the control of temperature. Thermoregulation is very important for a limpet as if external temperatures are too high, evaporation could cause the cells of the limpets to dry out, and could result in desiccation. This may be one reason why the limpet chooses to habit the lower and middle shores rather than the upper shores.

  1. Investigating how prolonged exposure to its optimum temperature affects the respiration of yeast.

    The graph for this result can be seen on the next page. This is a scatter-diagram with a line of best fit. This line will enable people to predict the amount of Carbon Dioxide that can be released at a certain temperature, based entirely on the results above.

  2. Investigation into whether light intensity affects the diversity of animal species in a stream.

    Primary consumers consume producers (plants) and are able to utilise energy from the plant. In this way, energy in transferred along the food chain. However, the process is very inefficient and a lot of energy is lost between the trophic levels (see diagram below) Due to this inefficiency, light intensity for an environment has a large effect on the trophic level and the species present.

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