Recent Posts

Post #1: Oberservations

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The area that I choose to study is the lakeshore area of Toronto, more specifically the little park across my apartment. This park and trail is thin and lengthy spanning over many kms. I will just be analyzing the area of the park that is closest to me. It is located beside a major roadway. It is flat with some rolling hills here and there but nothing major. The vegetation is grassland and city street. The park is regulated by city property. I visit the park every day for the past couple of months; however, right now we are in winter time and the temperature is cold and dry (for the most part). I would like to study the geese that are always at the park, and the squerrels that are present
The questions/ hypothesis
1) What types of habitats are used by Canadian Geese? Which species are present, both biotic and abiotic?
2) Which tree species are used by squirrels? (use point counts in areas with different trees)

Post 7: Theoretical Perspectives

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My project looks at Salvelinus Fontinalis  presence in a creek that is heavily intruded on by humans. The ecological processes I intend to explore are nutrient cycling, reproduction and anthropogenic disturbances.

Nutrient cycling will hopefully allow a deeper inspection into the impacts of pollution, habitat destruction and reduction and what the aesthetic cleaning of the creek is doing to the health of the water and its inhabitants. I also hope to look at how it has affected the creek bed and sides. Is it possible that frequent pruning of trees has resulted in shallow root systems and potentially less support for the sides of the creek to withstand seasonal flooding?

When exploring reproduction of Salvelinus Fontinalis I hope to explore their historic breeding space. What pH is optimal for reproduction? Is there a preferred sediment base? Do they need a certain amount of cover from surrounding shrubbery? Historically, has this been a highly sought after spot for spawning?

Anthropogenic disturbances  play a role in every area I hope to explore, but specifically I hope to look at what the overall impacts are of cleaning debris from the creek on water flow, shrubbery health and the organisms which reside in the waters and surrounding grasslands. Does the frequent disturbance of the creek bed and surrounding land reduce viable spawning grounds for the fish? Has the area become too urbanized with walking paths, bridges and maintenance for the habitat to maintain viability?

Key words: Anthropogenic disturbances, Spawning, Habitat destruction

Post #4 Sampling Strategies

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Overall, the most efficient method of sampling for my results was the random sampling. On common species, it had a percentage error of 7.5% versus 13.8% for systematic and 43.6% for haphazard sampling. It also had the best percentage error at 72.4% for the rare species, versus ? (did not account for the species) for systematic and 198.2% for haphazard sampling. Considering the fact that random and systematic had only a 27 minute difference in sampling times (12h38m vs 12h11m), it shows how much more efficient and accurate random sampling can be in both achieving results and saving time and resources in research. Haphazard sampling was the least accurate in terms of percentage error, but visiting the 5 sites versus the 24 of the other methods only took two hours and forty minutes. One notable thing I encountered while doing this activity is I found was that despite the 43.6% percentage error of common species for haphazard sample, this was due to skew because the two most common species having percentage errors of 86.25% and 0.925%, and that last value was the most accurate of any species using any method, the second smallest percentage error being 3.2%. Another interesting find was that systematic sampling had relatively similar accuracy for the common species, but it did did not register the two rare species that both random and haphazard sampling did. This is interesting because despite the fact that the haphazard sample sites were strategically chosen, but it only had a fifth of the quadrants as systematic sampling and a much higher percentage error of common species. What these results showcase is the strength of random sampling and what effect human bias can have on the results of sampling.

Post 6: Data Collection

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I have 20 replicates over a 2km stretch of creek and waterfall at Peterson Creek Park in Kamloops BC. I struggled to get my sample sizes as measuring across the creek was tricky and anything I would place in it would float away. Staking posts would damage the creek walls as I hoped to get the full range of creek for most samples. I ended up enlisting help and painting measurements on a stick then marking the edges with flagging tape. I noticed after my first walkthrough that my hypothesis could have varying results based on pollutants and human traffic which made me reevaluate. I also noticed there was virtually no wildlife which suggested the area may have underlying pollutants effecting multiple habitats. Soil and water sampling would be ideal if the resources to do so were available.

Post #3 Ongoing Field Observations

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I have continued to do field observations in my area of study. One my last visit, I identified two very interesting phenomena that did not catch my attention the last few times I have been there. I am not quite sure which experiment I am going to choose, so I am going to write this post inclusive of both of them and perhaps with some feedback and further consideration I will come to a final decision.

Option One:

I may choose to study the cottontails that surround the pond. There is a large amount of them in varying abundance in different groups around the pond. During my last visit, I noticed that some of the cottontail heads are beginning to fall apart, which I assume is for reproduction similar to how dandelions reproduce because they seem to fall apart into white fluff that seem like seedlings. However, some groups have many cottontails that have fallen apart or began to fall apart easily upon some light shaking and tapping with a stick. Other groups in the pond had cottontail heads that were still very firm and remained that way with similar shaking or tapping. After considering variables such as cottontail height, sunlight, cottontail abundance, and moisture, there did not seem to be any patterns. I later realized that I was not taking into account the pine trees as part of the abundance, and noticed that it seemed that the more crowded an area was, the less likely it was to have cottontails that were falling apart. I hypothesize that the cottontails that have less vegetation nearby and therefore less competition fall apart and reproduce faster, ensuring them better success and fitness, because they have better access to the available nutrients in the ecosystem. My prediction is that cottontails in less crowded areas would fall apart earlier and cottontails in more crowded areas would fall apart later in the season. Possible response variables could be the degree to which the cottontails have fallen apart (continuous) or the ratio of cottontails that have fallen apart versus stayed intact (continuous) and the possible explanatory variable could be number of cottontail heads in a given study area (continuous), number of trees and distance from the identified group of cottontails (continuous).

Option Two:

As I noticed the role of the pine trees in this pattern with the cottontails, I saw that they were in the process of making and dropping pine cones. Some trees had many early pinecones and some trees had many late stage pinecones in a way that varied greatly from tree to tree. I thought perhaps that they followed a similar pattern as the cottontails in terms of crowding and competition, but this did not seem to have any recognizable pattern. However, because this visit was done during clear skies, I was able to see how the sunlight hit the trees for most of the day and the path it would take across the sky over the daylight hours. That is how I noticed that the trees that got more sunlight seemed to have more early stage pinecones and the trees blocked by the shade of other trees as well as the branches that got less direct sunlight had more of the late stage pinecones. I hypothesize that decreasing sunlight is a trigger that signals to the plant that it is winter and time to shed the non-useful parts of the tree, triggering the shift from early to late stage pinecones. I predict that the trees that receive the most direct sunlight will shift into late stage pinecones later in the season that those that do not receive as much direct sunlight. The response variable would be the ratio of early to late stage pinecones (continuous) and the explanatory variable would be sunlight amount (low light versus high light) (categorical).

Post #2 Sources of Scientific Information

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The source of scientific ecological information is an article from Science Advances found here: https://advances.sciencemag.org/content/6/47/eabb7232

I would classify this source as being peer reviewed academic research material. My reasons for doing so include the fact that this is a study that includes both methods and results sections that evaluates data from the field of tropical rainforests, it is published in a Science journal who have peer review as one of their prerequisites for publishing journals, as found in their editorial policies found here: https://www.sciencemag.org/authors/science-journals-editorial-policies, and this paper was written by authors are are all from Earth and/or Environmental science departments of their respective higher education communities, classifying them as experts in their fields, they have in text citations and a bibliography of 64 sources relevant to their topic.

Design Reflections

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In module 3, I collected using point counting. I went out early in the morning and stayed for even increments of time at each plot. I found I got a good sense of surrounding wildlife and human activity but struggled to find the specimen I was looking for. I realized that this was further proof that my hypothesis is correct and thus persevere with my sampling strategy. I did some hiking following my samples to investigate the area further and found a sign stating dates the lake above the creek is stocked biannually and is about to be stocked in November 2020. I expect to find higher numbers of fry due to this and will resample to confirm.

While I do not feel the need to modify my approach, I do feel I should include human traffic in my official data as it was a significant finding and will show the overall impact on fish survival. I am also considering pollutants based on lack of aquatic plant life.

Blog Post 8 – Tables and Graphs

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For my Small Assignment Submission #5 I chose to input my data into a graph to best summarize my data. In order to make the graph more user friendly, I had decided to use the averages of the replicates I performed in each treatment level and put those into my graph so clearly show the trend. I’m not sure if this was the best option as the graph is very simple and perhaps in this case more information may be better (despite what the tutorial had indicated). Either way I was able to see a trend in my data. From treatment level 1 to treatment level 2 there is an easily noticeable decline in the Western Honey Bee pollination activity numbers (from an average of 6.9 from treatment level 1 to 3.1 from treatment level 2). From treatment level 2 to treatment level 3 there is a decline but it is not nearly as noticeable or dramatic as the previous relationship mentioned (from an average of 3.1 from treatment level 2 to 2.8 from treatment level 3).

Although I was expecting perhaps a more consistently downward trending graph, the data still agrees with my initial hypothesis. I will continue to think about adjusting my graph to allow for more information to be present, while also maintaining a user-friendly appearance. My graph has been attached for reference. Module 9 Assignment

Post #1 Observations

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The area that I have chosen to observe is a nearby city park called The Bill Reid Millennium Amphitheatre. The area of the park is approximately 200m x 1000m. The landscape and vegetation is nearly flat with some hills, covered mainly with grass and strategically placed trees that line the path ways and act as a barrier from the busy roads that surround the park on two of its four sides. A few single trees are placed throughout the grass field at various points.  It also contains a ravine that runs between the main path of the park and the sidewalk that runs alongside Highway 15, and a pond at the far south side of the park beside a quiet road. The initial visit was done on 15 November 2020 from approximately 6:15-6:50am. It was dark when I first arrived and the sunrise had just begun when I was leaving my initial observations. I believe the temperature was approximately 0-3 degrees Celsius and it was cloudy with various breaks that revealed the clear sky. There was no precipitation. It was about a month before the official beginning of winter so temperatures have been dropping and will continue to drop and the ecosystem has been receiving large amounts of precipitation. Because i will be observing and conducting my study in the winter, there will likely be no growth and little activity in the ecosystem but I would be interested in learning about how the ecosystem adapts to survive the harsh conditions of winter and what patterns might be seen during this season.

Some questions I might consider for my final project include:

How do non migrating chickadee birds acquire energy and choose to expend it in preparation for the winter months?

How do the ducks in this ecosystem behave in preparation for migrating south for the winter? Or, will they?

How do ducks behave socially in the winter months? Are they competitive or cooperative? Why might this be the case?

How does the vegetation adapt or behave to make it through the cold temperatures of the winter?

Post 7: Theoretical Perspectives

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As I am compiling my data, I have gained more understanding of what may cause ants to be in higher concentrations in certain areas.  One theoretical perspective that fits with my project is how vegetation disturbance affects ant abundance. The disturbance in my study includes complete removal of the weeds and mowing. Another one that fits my project is how does the lack of vegetation, or patchiness affect ants. Given the lack of vegetation in part of my yard and the abundance in the other part of my yard it would be possible to compare the amount of ants in both. Furthermore, how vegetation type affects ants would also fit my project given that part of my yard is grass and the other part is weedy.

Key terms that summarize my research are: vegetative patchiness, arthropod abundance, and disturbance.