Research update: September/October 2016

The prairie grasses are in flower on the green roofs - it must be fall!

The prairie grasses are in flower on the green roofs – it must be fall!

Fall is here once again and the plants on the green roofs are getting ready to face another tough winter. I, on the other hand, am getting ready to face a winter of lab work, data analysis, and writing. I’m happy to say that over the past couple months I’ve finished collecting all my data from my outdoor green roof experiments. After carrying out some experiments for 4 years, it was kind of bitter-sweet to see this step come to an end.

The nodding onion plants that had pollinators on them last month are now bursting with seeds. I can't wait to see if there are lots of new seedlings next year!

The nodding onion plants that had pollinators on them last month are now bursting with seeds. I can’t wait to see if there are lots of new seedlings next year!

I finished collecting all of my temperature probes in September.

I finished collecting all of my temperature probes in September.

I've collected a lot of temperature data from the green roofs over the past 2 years. Now I'm trying to make sense of the trends that I've found.

I’ve collected a lot of temperature data from the green roofs over the past 2 years. Now I’m trying to make sense of the trends that I’ve found.

 

 

 

 

 

 

 

 

 

 

In September, I collected all of the remaining temperature probes from my plots. This was a little tricky in some plots where the vegetation is now almost 5 feet tall! I compiled all the data, which was actually a big task – I’ve been recording temperature every 3 hours for over 2 years on over 60 probes.I’ve started to look at trends in these data and so far it looks like there is little difference between my different treatments in the winter but larger differences between the native prairie plants and the non-native succulent sedum plants during the summer. As you might expect, the succulent plants provide more cover and shade, so they tend to keep the soil cooler than the soil that’s exposed to the full-sun conditions. I’ll spend more time analyzing these data over the winter and will be writing my conclusions in my dissertation this spring.

Finding the temperature probes - only about the size of a dime - was a little tough in some of my plots where the vegetation was so tall. Eventually, I found them all!

Finding the temperature probes – only about the size of a dime – was a little tough in some of my plots where the vegetation was so tall. Eventually, I found them all!

I'm growing quite a collection of name tags from guest lectures and speaker events. It's always fun to talk to people about my research.

I’m growing quite a collection of name tags from guest lectures and speaker events. It’s always fun to talk to people about my research.

I was also invited to give a couple guest-lectures in October, including at an Economic Botany class at the Morton Arboretum and during a tour of the Chicago Botanic Garden by the Northwestern University Women’s Board. It’s always fun to teach people about green roofs, urban ecology, and the unique opportunities I have as a graduate researcher in a joint program between two remarkable institutions.

The prickly pear cactus is one of the only native species that survived two harsh years in the green roof trays.

The prickly pear cactus is one of the only native species that survived two harsh years in the green roof trays.

Fall has arrived on the green roofs! I'm happy that my research plots are really starting to look like prairies.

Fall has arrived on the green roofs! I’m happy that my research plots are really starting to look like prairies.

Other than finishing field work and guest lectures, I’ve mostly been organizing and analyzing data, mentoring students in an online program called Planting Science, preparing job applications, and getting lab work done (when all the equipment has been working… which seems to be a rare event). I finished extracting the DNA from all of my samples and have very slowly been making progress with my paternity study. I’m hoping that next month will be a big one for lab work success. I’ve got my fingers crossed!

 

The green roof trays are ready for another winter as the colors of fall creep in.

The green roof trays are ready for another winter as the colors of fall creep in.

Big bluestem is flowering in my green roof plots. See you next spring, prairie plants!

Big bluestem grass is flowering in my green roof plots. See you next spring, prairie plants!

Finally, I’ve been working on writing a short article about a unique plant that found its way to a green roof in London. The story should be published next month – stay tuned!

 

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Research update: August 2016

August is over and the summer field work is slowly coming to an end. Back-to-school for teachers and students means back-to-lab-and-writing for me.

Some of the plants in my green roof experiments are providing nectar and pollen for local bees. The bumble bees are especially loving the Allium cernuum (nodding onion).

Some of the plants in my green roof experiments are providing nectar and pollen for local bees. The bumble bees are especially loving the Allium cernuum (nodding onion).

I spent a lot of time this past month at my computer, looking at data I collected back in 2013 and writing about my results. I’ve been working on a written report or “manuscript” for a scientific journal. I finally improved things to the point where I felt pretty good about the way that everything looked and sounded so I submitted the manuscript to an urban ecology journal. Next, other scientists who have similar research interests will carefully review my work and let me know if they think I’ve missed something or performed any analyses incorrectly. When I receive their comments in about a month, I hope I will be able to make all the necessary changes and then re-submit my manuscript to be published. As soon as I submitted this first manuscript for review, I immediately started working on another manuscript looking at a different part of the data (the first manuscript is about how plant and insect diversity change on green roofs over time and the second manuscript is about how certain types of plants are better at surviving on green roofs than others). After I’ve spent more time on this second manuscript, I will submit it to a different journal and the whole review and re-writing process will be repeated. If you’re a scientist, there’s always more writing to be done.

As far as the outdoor work, I’ve finally finished the water-holding and evaporation experiment that I was running with my experimental green roof trays. I say “finally” because I had to add an extra trial due to some July rains and because this experiment is not one of my favorites to perform. It involves weighing the trays when they’re filled with soil, plants, and water, which can add up to about 40 pounds per tray. And there are 40 trays that each get measured 6 times in a 24-hour period. If you’re doing the math, that’s lifting trays 240 times. So yes, that experiment is FINALLY over and I’m pretty happy about it (so is my sore back). The next step will be to analyze the data and see what all those measurements mean. I’m excited to be able to use the results of that experiment to tell a story about which types of plants can absorb rainwater on green roofs.

It was strange to be fake-running my experiments on the green roofs as a film crew captured every move.

It was strange to be fake-running my experiments on the green roofs as a film crew captured every move.

One day this past month, I even got to “fake-run” this water-holding experiment as I was followed by a film crew. A local TV station is putting together a series on urban wildlife and asked me to participate by talking about biodiversity on green roofs and demonstrating some of my experimental techniques. It was fun to be hooked up to a microphone and followed around by a camera crew but they picked a VERY hot day for filming and it ended up being over 100 degrees (F) on the roofs! I think I’m going to look very sweaty in my first TV appearance but at least they captured the real-life work conditions that are present on green roofs. The episode will be in production for a while and I hope to put a link to the show on my blog this spring when it airs.

Every move was caught on camera as the film crew followed me on the green roofs. This is one of the few pictures where I'm not wiping away sweat in the 100+ degree heat.

Every move was caught on camera as the film crew followed me on the green roofs. This is one of the few pictures where I’m not wiping away sweat in the 100+ degree heat.

I think that really hot day with the TV crew will be the last one for a while. As the fall begins, I’ll get back to lab work, finish gathering the temperature data from all my research sites, start analyzing the data that I finished collecting this summer, and start writing more manuscripts for my dissertation. I’ll also be mentoring high school students through the PlantingScience program I participated in this summer and will begin the all-important search for a job. It should be an exciting time!

This fall, I'll be mentoring high school students through an online program. I got to learn all about the experiments they'll be doing at a hands-on summer workshop this past June.

This fall, I’ll be mentoring high school students through an online program. I got to learn all about the experiments they’ll be doing at a hands-on summer workshop this past June.

In the meantime, check out this article about how green roofs can help prevent urban flooding. Click here. Toward the end, there are even a few quotes from a familiar green roof ecologist! 😉 It’s fun to be able to be an expert on green roofs and biodiversity!

Research update: June/July 2016

Well, as you can see, my “monthly” research updates are a little bit behind and this post is extra long. It seems like with all the work to be done outdoors and out of town, it’s been hard to sit down to write about it all. But as I look back at June and July it’s exciting to remember all that has happened.

Ratibida pinnata (gray-headed coneflower) blooms beautifully in one of my green roof plots.

Ratibida pinnata (gray-headed coneflower) blooms beautifully in one of my green roof plots.

First, I am happy to say that an article I wrote about biodiversity on green roofs was published in Wild Seed Magazine, a publication from the Maine-based non-profit Wild Seed Project. I won’t say too much about the article, other than you should click HERE to read it and if you should click on the link above if you want to get a copy of the whole magazine (which includes an article from the amazing naturalist Doug Tallamy and is really good).

The Dalea purpurea (purple prairie clover) was blooming on the green roofs in June and attracting pollinators!

The Dalea purpurea (purple prairie clover) was blooming on the green roofs in June and attracting pollinators!

As far as research goes, June started out with data collection on the green roofs. I’m continuing to measure the plants in the prairie mixes that I planted back in 2012 and at the beginning of the summer, things looked a little sparse but promising. After a pretty rainy summer, some of the same plots are actually pretty lush and there are many species of plants that are flowering in beautiful displays of yellow, white, and purple flowers. It’s impossible to capture them all with my cell phone’s camera, but believe me when I tell you that they are lots of pollinators coming to visit my plants too! When I’m back to more indoor work in the fall I’ll analyze the data to look for significant patterns. So far, it looks like the species from the prairies that are most similar to green roofs are the ones that are growing the best. It’s really exciting for me to know that when I stop collecting the data for this experiment, there will be some little prairies on the green roofs for years to come.

I'm continuing to measure the amount of water that the different plant combinations capture and hold throughout the day.

I’m continuing to measure the amount of water that the different plant combinations capture and hold throughout the day.

I continue to measure the growth of the plants in my green roof prairie plots that I originally planted back in 2012.

I continue to measure the growth of the plants in my green roof prairie plots that I originally planted back in 2012.

My experiment measuring water capture continues as does my collection of weeds from the green roof trays to determine how good the prairie plants are at resisting weeds compared to succulent plants. Everything is going well with those experiments except for the fact that a surprise thunderstorm messed up some of my data and I have to do one part of the experiment over again. I’m not happy about that, but that’s just how botanical research goes sometimes. I’ve got my fingers crossed for some rain-free days in early August.

Weighing the weeds continues. So far it looks like the succulent Sedum plants are the best at preventing weeds.

Weighing the weeds continues. So far it looks like the succulent Sedum plants are the best at preventing weeds.

 

Back to the ground - I finally found the Penstemon plants I was looking for in the shortgrass prairies. It's fun to go back to the sites that I'm trying to replicate on the roof and appreciate how special these habitats are.

Back to the ground – I finally found the Penstemon plants I was looking for in the shortgrass prairies. It’s fun to go back to the sites that I’m trying to replicate on the roof and appreciate how special these habitats are.

Pollinators are visiting my plants on the green roofs! It's exciting to see evidence of the ecological relationships that I was hoping to support.

Pollinators are visiting my plants on the green roofs! It’s exciting to see evidence of the ecological relationships that I was hoping to support.

In addition to the green roofs, I also went to a couple prairie remnants southwest of Chicago to collect some plant tissue. I’ve been putting my lab work on pause for the summer, but if you remember, one of my experiments is to measure pollen movement between green roofs using a paternity study. Well, I’m finding that it’s really hard to distinguish one “dad” plant from another because the dads have very similar DNA. I think this is because the nursery where I got the experimental plants wasn’t using a diverse mix of parental plants but I want to make sure that the plants you’d find in nature would actually have more diversity in their DNA. To do this, I need DNA from plants in their natural habitat – and this is what led me to collect leaves from the shortgrass prairies on a steamy Friday in June. I was hoping to find three whole fields full of my target species of Penstemon plants but, after hours of searching, I only found two small patches. For now, I’ve collected the leaf tissue and it’s drying in the lab. I’ll get back to that when it’s time to get back to the lab in the fall.

Lespedeza capitata (roundhead bushclover) blooms beautifully in one of my plots on a green roof.

Lespedeza capitata (roundhead bushclover) blooms beautifully in one of my plots on a green roof.

It’s actually hard to believe that I was able to collect so many data when I look at all the times I was out of town, talking about research rather than actually conducting it. But through these experiences, I met a lot of wonderful people that are also interested in plant and animal conservation, urban ecology, and science education & communication – my favorite things! At the beginning of June, I was thrilled to be selected as a participant in ComSciCon in Cambridge, MA. This is a graduate student-run conference for other graduate students in science who are interested in engaging with non-scientific audiences. The fellow attendees I met are involved in some amazing endeavors, including documentary filmmaking, graphic design, afterschool programs, and policy advocacy. I could go on for many paragraphs about how awesome these folks were, but I’ll just summarize by saying that I was truly inspired. I started writing a piece about green roofs to be submitted to a children’s magazine while I was there and I’m hoping to get it published this year – stay tuned.

After my trip to the East coast, I headed out west to Colorado Spring to participate as a botanist mentor in a workshop called Digging Deeper. As a mentor, I got to meet high school teachers that teach their students about plants together with plant scientists in a program called Planting Science. As a previous high school science teacher and current scientist, it was really fun to try and figure out the best ways to teach teenagers about plants in an exciting and engaging way. In the fall, I’ll be a mentor to a couple student groups and through video conferences and email messages, we’ll help them design their own experiments to learn about botany – how cool is that?

A spontaneous Penstemon plant (the one I'm studying in a different experiment) has germinated and flowered in my experimental green roof trays. I'm glad to see that this native species does so well on green roofs.

A spontaneous Penstemon plant (the one I’m studying in a different experiment) has germinated and flowered in my experimental green roof trays. I’m glad to see that this native species does so well on green roofs.

I had a couple more trips a little closer to home too. The first one was to Michigan to share my research and meet the new cohort of Northwestern University Presidential Fellows. Wow. More amazing people doing some fascinating research from applications of nanofluids and deciphering the genetic code to impacts of affirmative action on hiring practices in the NFL. The second trip was to Wisconsin to give a presentation at the North American Congress of the Society for Conservation Biology. I’m pleased that my presentation about my green roof research was well received and I even got to meet some other professional from the Chicago area that work with trees, wildlife, and the human-nature connection. As I finish the last year of data collection for my dissertation, it’s really helpful to start thinking more about the broad applications of my research and how the things I’ve learned so far might be applied to other fields when graduate school is complete.

As a final note, in addition to the research and trips, I also got married in July! Did you notice the new name of the site? I may have a new name but the research is still pretty much the same – I don’t think the plants noticed at all!

Up next month: Field work, lab work, data analysis, writing, and even maybe a TV appearance!