Analyzing Environmental Change in California
Analyzing Environmental Change in California
What is GIS? Links below:
Content Guide:
Project overview & brief summary of the study area.
Brief essay describing citizen science, its importance, & relevance to the project.
Examples & brief descriptions of GIS products that can be produced using FOSS.
Takeaways and recommendations for your own Citizen Scientist journey.
Purpose
This project is meant to enhance science literacy and engagement in nature by informing everyday people of various tools at their disposal with which they can identify, understand, and communicate observations and thoughts in local and online communities. The goal is to empower citizens to engage in the scientific community by presenting small tutorials and work samples applying open-source GIS products to identify and track environmental problems. With this, folks will be better informed and prepared to address climate change at the community level. This website will introduce folks to open-source tools like the QGIS application and various methods to analyze environmental data. As you look through the content, feel free to interact with it. Explore the buttons and zoom in to the images to capture more detail.
Banner Image: Beaver Lake, Yellowstone National Park Photo Credit: Mark Laskin
Our sample study area will be Sonoma County, California. The land here contains wetland habitats (among others) that are essential to mitigating sea level rise, habitat conservation, rising temperatures, and more effects of climate change. The area is also home to key habitats for two endangered amphibians: the California Red-Legged Frog and the California Tiger Salamander, each of which can be considered an indicator species. The state's combination of topography, Mediterranean climate, and unique wildlife can be considered as the basis for a litmus test for climate change in North America. This also makes it a perfect study site for open-source GIS applications.
Citizen science is the active inclusion of civilian, non-professional scientists in the greater scientific community. The goal of expanding the community this way is to allow for greater diversity of thought and accelerate the innovation and application of new knowledge. This doesn’t have to involve Jill Krill going into a lab and having to find their way around a microscope for the first time since high school. Often, it involves everyday folks designing and/or conducting research, analyzing data, and sharing observations and thoughts of their community’s environment (Lee et al., 2020). Or someone taking their family on a walk through City Park to record what wildlife they find. This shouldn’t be interpreted as professionals abusing the community's desire to participate in science, rather, the expansion of what it means to be a scientist. When you think about it, a scientist is just a person who analyzes observations, plain and simple. Due to the growing popularity of citizen science and the power of modern technology and crowdsourcing, citizen science is quickly becoming recognized as a valid scientific approach (Lee et al., 2020).
There are plenty of reasons to think citizen science is important, but they’re fairly subjective. I think citizen science is important for two main reasons: to empower the public and hold the government and industry affiliates accountable. I invite you to form your own opinion, whether you agree or disagree. The primary benefits of integrating community participation in the greater scientific community network have been proven through case studies performed around the world. Theobald et al. (2015) and Franzoni & Sauermann (2012) demonstrated the fiscal benefits of citizen science and the additional benefits it can generate, like innovation in the field of biodiversity conservation and successful promotion of marketing campaigns. Gardner et al. (2012) showed that a professionally-guided citizen science program can generate as much as four times the amount of study samples as traditional research methods at no extra cost.
Some challenges have already been addressed as well, including short-lived projects that negate the overall purpose of civilian inclusion and by causing volunteers to lose interest. There are also operational challenges like coordinating large groups, communicating findings, and increasing project visibility in the community. Pocock et al. (2017) discuss a major challenge facing community science on the international stage: a spatial bias toward western nations. Citizen science inherently relies on the resources provided by society; therefore, it is most affective in countries that can afford to apply its resources in this way. I encourage you to keep this in mind as you begin your scientific journey and look for data to explore.
As an individual citizen scientist, you will likely face different challenges. Primarily, access to tools and information will be a major obstacle. Please know that you may not find what you need! Or, you might find it and realize the data you find doesn’t support your project, so you have to switch tracks. This has happened to me plenty of times, and it is always for the better. Like every artist says, trust the process!
Applying Free and Open-Source Software (FOSS) in GIS
Application 1: Creating a Layout (QGIS)
Use the Layout Creator in QGIS to produce beautiful map layouts
Load your data -> Project -> New Print Layout
Add map (6th icon down) and fit to preferences.
When you're done editing your map, go to Item Properties -> Layers -> check Lock Layers and Lock Styles for Layers
Add scale bar, North arrow, title, and any other features
Style and export as image (choose JPG)
Sample Layouts:
One of the cool things you can do is use satellite imagery to look at landscapes. Click and read through the "How-To: Landsat Download & Multiband Creation" for more.
Application 2: Downloading, Analyzing, and Interpreting Satellite Imagery
The photo on the left is showing you a natural color image of Sonoma County, CA. The image was taken using USGS LandSAT9 imagery that was clipped in QGIS and processed through RStudio with the code provided. Natural color images use bands 4, 3, and 2 (Red, Green, Blue) in that order, and are great for viewing the unfiltered status of an area's topography and vegetation cover.
This photo is highlighting the distinction between vegetative and non-vegetative surfaces. Vegetation is shown in different shades of red, while non-vegetative surfaces, like urban environments and water, are shown in blue. You may even notice some distinctions between the types of vegetation shown. We will explore that soon. This image uses bands 5, 4, and 3, (NIR, Red, Green) respectively.
This image is great for delineating urban landscapes using bands 7, 6, and 4 (SWIR2, SWIR1, Red), respectively. Urban areas, like the City of Santa Rosa shown here, are highlighted in purple. Note that you can also delineate vegetation types here, on a sort of "green gradient". Healthy, dense vegetation is shown in green and unhealthy vegetation can be seen in light green, with variation in between. You may also notice that this image appears clearer or more "crisp" than others. This is because this combination uses both SWIR bands (6 and 7), which are less susceptible to blockage by atmospheric haze than lower-wavelength bands (e.g., blue).
This band combination is excellent for delineating vegetative types, but it does not have to be used only for that. This image shows agriculture and maintained pastures in bright green and undomesticated vegetation in a deeper green. Like the previous image, we can also see urban areas highlighted in purple and water highlighted in blue. This combination uses bands 6, 5, and 2 (SWIR1, NIR, Blue), respectively.
This band combination is intended for identifying burn scars across a landscape using bands 6, 4, and 3 (SWIR1, Red, Green), respectively. Burned areas are shown in deep shades of red that may seem out of place among green vegetation. Here, we can see burn scars to in the center of the county, just south of Lake Sonoma. We can also see what could be a burn scar to east of Santa Rosa, on the opposite side of California State Route 101.
Vegetation health in 2013. Notice that most of the county is covered in healthy vegetation, with extremely healthy agricultural fields in the south part of the county.
Vegetation health in 2023. Notice a loss in vegetation health throughout the county, especially crop fields and dense mountain forests. Note that both of these areas contain important amphibian habitats.
Change in vegetation health over time. Less healthy is in red, more healthy is in green, and median values indicating little change are transparent.
Surface moisture in 2013. Notice patterns (known as spatial patterns) in the imagery. What conclusions can you make? Can you tie surface moisture to other variables (hint: what else are we looking at that requires the presence of surface moisture)?
Surface moisture in 2023. Notice an extreme loss in surface moisture throughout the county, particularly in the central mountain region west of Santa Rosa, and throughout the southern part of the county. Both of these areas cover essential amphibian habitat.
Change in surface moisture. Drier land is in yellow, wetter land is in blue, and median values indicating little change are transparent.
Built environment in 2013. Urban build and exposed ground surface are shown in orange, while non-built up environments are shown in purple.
Built environment in 2023. Notice an extreme loss of non-built up environment throughout the county. Needless to say, essential amphibian habitats are included in this vast change in land cover.
Change in built-up environment and exposed ground surface over time. Increased development is in orange, decreased development is in purple, and median values indicating little change are transparent.
Application 4: Producing Animations & 3-D Imagery
I challenge you to teach yourself! Use these resources to help you:
As you grow your skills, you'll be able to take on bigger challenges. Creating animations and 3D imagery is another great visual aid in tracking changes over time. Here, I tried making a GIF that tracks temperature changes covering the dates of the Tubbs Fire. Unfortunately, and you'll definitely come across this in your research, my final product failed to reach my goal of tracking the fire and ambient temperature changes. Sometimes your success comes from exploring different perspectives of a new skill, or just making pretty pictures. I'm happy with this outcome because I learned a new skill and got to play around with some cool design features. Keeping yourself engaged is important too!
Conclusion: What should I take away from this?
By now, you might be asking yourself, "So how can I be a 'good' citizen scientist?" Like any hobby or career, there isn't just one way to create value in a community. Some best practices I reccomend are:
Be honest with yourself - acknowledge the areas where your knowledge or skills falls short and allow others to help you. Be open to learning new skills, and be willing to teach yourself.
Expect imperfection and have patience with yourself. Remember to trust the process. Not everything you do will be great (some of it won't even be good), and that's very okay.
Communicate clearly and frequently with your peers and mentors, if you have any. It is always better to overcommunicate than undercommunicate.
Help others when they when they need help, and you're able to help them.
Advocate for your right to a healthy environment.
Contact Mark to get more information on the project: mlaskin97@gmail.com