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Summer Research Experience: Student Blog

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Did plants get that climate change memo?

July 22, 2013, by Guillermo Terrazas
Guillermo Terrazas
I open my sleepy eyes; it is 5 am and my hand cannot make it to the alarm clock before the voices in my head start telling me that it is too early to wake up. I take a deep breath, put my feet on the cold floor and get ready. I stare out the window trying not to fall asleep as I wait for my ride. I see lights coming down the road and head downstairs pretending I am a ninja, trying not to wake the other residents. Fast forward 3 hours. I am sitting in front of my computer thinking about how great my morning workout went. And how juicy and delicious were those blueberries and pineapple chunks...Read more >

Boston's a pretty hot town, or at least the trees think so

June 10, 2013, by David Miller
David Miller
Once again, I find myself wondering why this slope is so steep. The curve shows the approximate date that autumn begins relative to distance from downtown Boston, and the results are mind-boggling. I look over to my research partner, Memo Terrazas, from the University of Texas at Austin. "Fall starts half a day later per kilometer into the city... that can't be right." This is incredible. It appears that parts of Boston have an extra whole month of summer compared to relatively "rural" areas, like Framingham, less than 40 km from the Boston Public Garden. Climate change is more local than you...Read more >

Trees on fire

June 4, 2013, by Dmitri Ilushin
Yeah, I'm the goof who messed up on crossing his arms.
Kenya? Been there. Japan? Seen that. Michigan highway I-96? Saw that last week. The best part is that I can do all this without leaving the comfort of my computer. My research at the forest involves trying to extract the day that leaves come out and when they fall off. The thing is, we don't really notice when the world gets just a bit hotter each year ourselves, but trees and other types of plants react pronouncedly to any subtle changes in average temperatures. I study these reactions by looking at pictures of trees over time from cameras located all around the world. In doing so, I try to...Read more >

K-12 phenology lessons for the phenocam project

August 6, 2012, by Katherine Bennett
Katie Bennett and students.
  In the fall of 2011, the Ashburnham- Westminster Regional School District became the first of five schools to join Dr. Andrew Richardson’s Phenocam Network with the installation of a digital phenocam on the roof of Overlook Middle School in Ashburnham, Massachusetts. As a part of the Phenocam project, students at the K-12 level have expanded the scope of phenological monitoring that is part of the Harvard Forest Schoolyard Ecology Program protocol, Buds, Leaves, and Global Warming. In this protocol, students work with Dr. John O’Keefe to monitor buds and leaves on schoolyard trees to...Read more >

MODIS satellite imagery as applied to phenological assessment, team BU

August 6, 2012, by Erin Frick and Jose Luis Rugelio
MODIS tile
Observations of vegetation phenology can be collected not only from ground-level field studies but also space borne remote sensing instruments. In particular, satellite images may be used to assess vegetative phenophase transition dates such as spring onset, maximum vegetation cover and senescence across regional scales. One approach to such assessment entails analysis of data from the MODIS (Moderate Resolution Imaging Spectroradiometer) instrument. MODIS provides measurements of light reflectance that can be analyzed to estimate phenophase transition dates with respect to variation in land...Read more >

Near remote sensing to track changes in phenology in forests, team Harvard

August 6, 2012, by Dmitri Ilushin, Sascha Perry, and Hannah Skolnik
A representative photo from Kenya of a water buffalo at a watering hole.
This year, the Richardson Lab of Harvard University and the Friedl lab of Boston University set out to study climate change using two different methods, remote sensing and near remote sensing. This summer, the two teams predominantly focused on honing the methods already established by other scientists to study the changing climate as well as widen the subset of biomes and localities studied. Team Harvard is comprised of Dmitri Ilushin of Harvard University; Sascha Perry, Lincoln University in Missouri; and Hannah Skolnik of Columbia University. We are under the direction of the Richardson...Read more >

Ragweed in a changing climate

August 23, 2011, by Linn Jennings, Laura Hancock, and Samuel Safran
Ambrosia artemisiifolia , better known as common ragweed, is a leading cause of hay fever allergies. It grows in disturbed areas, like roadsides and abandoned fields. Increased atmospheric CO2 has been shown to increase the pollen production and growth of ragweed. Thus, with predicted changes in land use and climate, pollen production of common ragweed is likely to increase. Our team carried out three experiments – a presence/absence study, a demographic study, and greenhouse experiment – to collect data that will be used to develop maps of allergy risk under both current and future...Read more >

Water transport in trees

August 23, 2011, by Alena Tofte
Multitudes of tightly packed rings in an old, sturdy tree hide a secret – not only do they elucidate to a discerning viewer a historical record of how much the tree grew each year for the course of its life, but these rings also contain the remnants of its once-functional woody vascular tissue, the xylem. Xylem once threaded thin streams of water and vital nutrients throughout the growing tree’s roots, trunk and crown. Water transport in trees is a process ruled by a multitude of factors, including the porosity of the wood, the size of the vessels which comprise the vasculature, the species'...Read more >

Climate change impacts on phenology and ecosystem processes of northeastern forests

August 3, 2011, by Bridget, Libby, Lakeitha, Rachel, and Isaac
Phenology is the study of changes in organisms due to the seasonal cycle. Phenological shifts in forest and other ecosystems, due to climate change, could have important impacts on carbon and nutrient cycling. Therefore, it is important to find easy and accurate ways of tracking phenology in numerous ecosystems over an extended period of time. The Harvard Forest has multiple digital cameras set up to take photos of the canopy. These cameras are part of a larger network of digital cameras known as the Phenocam network. Images from this network are used to evaluate changes in phenology based on...Read more >

REUs ace summer symposium!

August 12, 2010, by Aleta Wiley
In the final week of the Summer Research Program in Ecology for Undergraduates at Harvard Forest, all 33 students participated in the Student Symposium on August 11-12 in the Fisher Museum. Over a day and a half, all the students presented 15 minute talks to an audience comprising program mentors, university professors, Harvard Forest researchers, family members, and of course, their fellow students. As each student discussed his/her summer research, the audience was impressed with the diversity of projects presented ( Abstracts are available here ). Since Harvard Forest is an LTER (Long Term...Read more >

Linking phenology to ecosystem processes in forests of the northeast

July 19, 2010, by Andrea Garcia, Adam Young, and Cory Teshera-Sterne
We are working with Dr. Andrew Richardson and two of his postdocs, Koen Hufkins and Oliver Sonnentag, to investigate ways of monitoring and measuring the phenology (recurring life cycle events, such as flowering, spring green-up or senescence) of North American forests using webcams and digital imaging. This project is highly analytical and employs the use of computer programming languages such as R and MatLab. These programs let us process thousands of images so we can isolate ideal conditions in which to measure the vegetation indices for a given day or season. There are a multitude of...Read more >