Blog Post 2 – Sources of Scientific Information

I chose a paper from the TRU library: Assessment of atmospheric pollution with heavy metals and nitrogen using Pleurozium schreberi mosses as bioindicator in Latvia: spatial and temporal aspects. It is written by an expert in the field, it includes in-text citations, and it also contains a bibliography. It is ACADEMIC MATERIAL. It was reviewed by at least 1 referee before publication. It is PEER REVIEWED. It describes “methods” in details and also reports all results of the field/lab study completed by the authors. It is RESEARCH MATERIAL.

Reference:

Tabors, G., Nikodemus, O., Dobkeviča, L., Kļaviņa, L., Ajanoviča, A., Viligurs, K., & Krūze, I. (2017). Assessment of atmospheric pollution with heavy metals and nitrogen using Pleurozium schreberi mosses as bioindicator in Latvia: spatial and temporal aspects. Environmental & Experimental Biology, 15(2), 143–150. https://doi-org.ezproxy.tru.ca/10.22364/eeb.15.

 

Blog Post 3

I plan to study Calliope hummingbird distribution at three banding sites (even after reading the Gotelli and Ellison paper!).

All three banding sites that I have chosen have more Rufous than Calliope captures, but the percentage of Calliope captures is distinct at each site. The Cinnabar site had the fewest numbers of hummingbirds overall, almost all of which are Rufous. The Cassiar Ranch site has the highest percentage of Calliope captures. The Private Residence site has the highest numbers of hummingbirds overall, with the Calliope percentage falling somewhere between the two other sites.

Feeding and banding protocols are identical for all sites. All three sites are within 52km of each other, at similar elevations and with abundant water sources. The most obvious differences in my site observations are forest age and density.

My hypothesis is that as surrounding forest age and density decrease, the percentage of Calliope hummingbird captures will increase. The response variable for this project is the percentage of Calliope captures (categorical). Potential explanatory variables for this project are forest age and density (continuous).

Blog Post 2

Hou, L. & Welch, K.C., Jr (2016). Premigratory ruby-throated hummingbirds, Archilochus colubris, exhibit multiple strategies for fuelling migration. Animal Behaviour, 121, 87-99.

This paper is co-authored by two University of Toronto field experts, includes both in-text citations and a bibliography, was submitted to a journal that uses of a minimum of two independent expert reviewers through a double-blind system, and includes sections on methods and results. This article qualifies as academic, peer-reviewed research material.

Blog Post 1

I have selected three sites in the Fort St. James, BC area for observation. I’ve been a volunteer bander with Rocky Point Bird Observatory’s Hummingbird Project of BC for six years. Currently, I monitor three sites and have observed differences in both hummingbird species’ composition and abundance between sites. All three sites are in the dry sub-boreal spruce biogeoclimatic zone of the Nechako Plateau, which is classified as having a warm, humid continental climate. Summers are short and hot, with highs exceeding 30° C. Winters are long and cold, with lows occasional reaching below -40° C.

Site 1 is Cinnabar Research Station. Cinnabar Research Station is located on the south side of Tezzeron Lake, within the boundaries of the John Prince Research Forest. The banding site is on a north-facing slope, halfway between the forest edge and the lake shore.  The forest is a mature mix of Douglas and subalpine fir, spruce, pine, trembling aspen, black cottonwood and paper birch. The understory is composed primarily of willows, rose, soopallie, cranberry, thimbleberry, red osier dogwood, black twinberry, devil’s club, huckleberry, and fireweed.

Site 2 is Cassiar Ranch. The Cassiar Ranch site is located on 160 acres of mixed pasture and aspen, pine dominated forest, sitting slightly higher than the surrounding landscape. Two seasonal streams traverse the property and there is also a man-made pond within a 10 acre fenced livestock area. One unique habitat feature of this site is a naturally occurring mineral lick, which falls outside the fenced livestock area and is heavily frequented by wildlife. The day I visited, I observed bear, moose, elk, deer, wolf, coyote, small mammal and bird tracks.

Site 3 is a Private Residence. The Private Residence is located in a subdivision on the south shore of Stuart Lake. The subdivision is a collection of around twenty lots, varying in size from 3-8 acres. The residence where I band is a 5-acre, cleared site. It is bordered on the north side by a two-lane dirt road, on the west and east sides by a sparse barrier of pine and aspen; is open to the southern lot.

  1. What does past years’ data show re: hummingbird species composition and abundance at these sites; are they different?
  2. What is the elevation at each site, how might that influence species composition?
  3. Is tree density impacting species abundance?

Blog Post 9: Field Research Reflections

Throughout this process I struggled to come up with a concept that I could test in the green space by my house. While I was able to eventually turn my observation into an experiment, I began to appreciate the lengths ecologist go to in attempt to find information that will better our world. What I really did struggle with on this project is finding research to help me with my study. As I was reading more of the research articles I also struggled with how basic my study is in comparison to the study’s we have been reading. I felt more pressure and stress to try to make it more then what it was. I spent so much time trying to figure out so many factors to incorporate into my study but then realized they had nothing to do with it. I enjoyed finding out more about the biodiversity of the Potentilla fruticosa, and look forward to the next project.

Blog Post 7: Theoretical Perspectives

The basis of my research is focused around the Potentilla fruticosa plant and what really impacts the amount of blooms they produce. Throughout my research I have found a few studies that show how the Potentilla fruticosa add to biodiversity, and help prevent erosion in landscaping. On study looked at the shrubs as carbon sinks which could possibly be beneficial to urban settings. I also discovered the potentilla fruticosa plays a major role in attracting pollinators and providing habitat to a variety of different species.

 

Key words that would describe my study would be: biodiverse shrub, optimal growth setting, and

Blog Post 9: Field Research & Reflections

This was my first time designing and carrying out a field research project / natural experiment to this extent. Reflecting on the process, I think I would have chosen a different site, something with a bit more variability and ease of access. I am genuinely interested in riparian ecosystem studies so this was a great experience to make observations and test hypotheses on a local stream.

The most difficult part about implementing my field research was creating a study design that I felt accurately captured the study area. It was difficult because this project scope was meant to be simple, and I had limited time, but I would have really liked to expand the study area to capture more of the riparian corridor, or even sample further up the stream where less human disturbance (e.g. recreation) was present.

Getting out there and engaging in the practice of ecology has been really rewarding. It was truly difficult to carry out a natural experiment based on observation alone. Reading the discussion papers, the textbook, and the literature for my final project really opened my eyes to the breadth of knowledge and hard work that is put into studying the natural environment. My experience in BIOL 3021 was equal parts challenging and rewarding.

Thank-you Professor Elliot for a great course!

Blog Post 7: Theoretical Perspectives (Percy)

The theoretical basis of my research project involves the examination of bottom-up and top-down regulation on the abundance of Orconectes propinquus (freshwater Northern Ontario Crayfish). Jochum et al (2012) examine the combined effects of nutrient availability and size structure of predatory crap populations (bottom-up and top-down forces) on the mean community body mass, abundance, species richness, and the biomass and abundance of individual taxa from the entire community regardless of trophic levels. This is a similar study in which I examine the top-down and bottom-up forces occurring in two different freshwater lakes in North Bay, Ontario. The longer the crayfish, the higher the biomass, therefore a possible result of top-down forcing of predators on a particular species of crayfish. In particular, the difference in length of the crayfish in one lake as opposed to the other may be a result of an underlying process such as bottom-up or top-down regulation. Another ecological process that may be touched on in my hypothesis is climate change. In freshwater ecosystems, increased frequency of extreme rain and flooding can affect freshwater systems by contamination of biocides and nutrients. This type of stressor may have an influence on abundance and/or productivity of the ecosystem. The many different stressors and their potential affect on abundance of crayfish species is important when trying to understand predator-prey relationships, in this case, between large/small mouth bass and crayfish.

3 keywords: bottom-up regulation, abundance, freshwater crayfish, multiple stressors

Blog Post 6: Data Collection – Heather Lean

While my last post made reference to my dislike of spiders, I have to say that my most recent observations and data collection at my site were taken over by wasps. That being said I was able to get 16 samples in total between 4 shrubs and while I did not have much difficulty in implementing my design, I did realize that in some of the shrubs some parts just met the minimum for the sampling height. While the shrubs overall are of adequate size for my study (which is 4 feet) most were well over 4 feet, some parts were barely tall enough. While this would not have any significant impact on my field study, I realized that depending on the nature and source of study this should be a consideration in the future development of my field studies.

Blog Post 9: Field Research Reflections (Percy)

Overall, the process of this field project has been a learning experience to say the least. From choosing a project that was interesting yet hard to test (mayflies in Northern Ontario), to creating my own traps for my new project and them being taken away from pedestrians, I would say that I have learned more than I thought I would. The first change I had to make was changing the entire project itself, then I thought I would create my own minnow traps to save some money, realized those didn’t work (and were taken out of the water by pedestrians), and then finally getting the help I needed by meeting Joe the fisherman and getting tips and real minnow traps for the crayfish. Throughout this entire process, I have gone from being really excited to see what I caught to very upset and frustrated when realizing it wasn’t working. This process allowed me to really open my eyes to ecological studies and experiments as I have gained a true appreciation for the patience, concentration, and time that goes into a ecological field study. I have also realized that although there is evidence of a particular process occurring in an area, these processes can be influenced by the environmental conditions, time of the year, and so on.