Surplus and stress control autumn timing: Climate change might cause an early shedding of leaves if trees have stored enough carbon (3.101319)
Date: 2020Creator: Rollinson, Christine R.
Type: Article
Working across space and time: nonstationarity in ecological research and application (3.102246)
Date: February 1 2021Creator: Rollinson, Christine R.
Type: Article
Joint effects of climate, tree size, and year on annual tree growth derived from tree-ring records of ten globally distributed forests (3.102247)
Date: January 2022Creator: Rollinson, Christine R.
Type: Article
Forest responses to last-millennium hydroclimate variability are governed by spatial variations in ecosystem sensitivity (3.102248)
Date: March 2021Creator: Rollinson, Christine R.
Type: Article
Improving phenology predictions for sparsely observed species through fusion of botanical collections and citizen-science (3.102463)
Date: December 2021Creator: Fitzpatrick, Lucien , Giambuzzi, Perry, Reidy, Brendon, Rollinson, Christine R.
Type: Article
Approaching autumn: Fall is on its way, From Morton Arboretum, Botanic Garden and other experts, what to know about leaves around Chicago (3.103252)
Date: August 29 2021Creator: Warnecke, Lauren
Type: Document
Description:Copy of an article about fall color published in the Chicago Tribune featuring Forest Ecologist Christy Rollinson and Plant Clinic Manager Julie Janoski.
When to Expect Full Fall Colors This Season (3.103260)
Date: October 5 2021Type: Document
Description:Copy of an transcript from a segment on Naperville Community Television (NCTV17) on fall color. Features Forest Ecologist Christy Rollinson.
To See a Tree (3.104310)
Date: 2021Type: Document
Description:Copy of an Arboretum blog post titled, "To See a Tree," which features different Arboretum researchers and what they look for in a tree.
Eight Top Spots to See Fall Color at the Arboretum (3.104326)
Date: October 4 2021Type: Document
Description:Copy of a post from the blog series, When Trees Talk, highlighting areas in the Arboretum with great fall color.
Five Ways to Grow Resilient Gardens in a Changing Climate (3.104335)
Date: April 2022Creator: Pudar, Brooke
Type: Document
Description:Copy of a post from the blog series, When Trees Talk, with tips for growing resilient garden in a changing climate.
Arboretum Land Use Core Analysis (3.44157)
Date: 2011Creator: Fahey, Bob
Type: Dataset
Description:The dataset consists of approximately 105 tree cores from multiple areas at The Morton Arboretum.
Arboretum Phenology and Climate Response (3.44158)
Date: 2011 – 2016Creator: Fahey, Bob
Type: Dataset
Description:Phenology monitoring was conducted by Fahey, Carrier, and multiple volunteers in the spring and fall of each year from 2011 through 2016. The dataset includes ~685 individuals from the Juglandaceae, Midwest, Northern Illinois, Ozark, Quercus, Tilia, and Ulmaceae collections at The Morton Arboretum. Traits monitored include: fruiting, bud condition, leaf size, flower condition, and leaf fall, and leaf color. Protocols can be found in T://Fahey/Current Projects/ Arboretum Phenology and Climate Response/Protocols.
Coastal Pines Tree Cores (3.44159)
Date: 2011 – 2012Creator: Fahey, Bob
Type: Dataset
Description:The dataset includes tree cores from approximately 500 trees from eight sites around Lakes Michigan and Superior. Annual growth increments were measured to 0.001 mm using a Velmex stage micrometer and Metronics Quick-Check 4100.
Chicago Urban Forest Study (CUFS) Tree Cores (3.44160)
Date: 2013Creator: Fahey, Bob
Type: Dataset
Description:
The dataset includes approximately 650 tree core measurements from five sites. The study part of a joint project between the Forest Ecology Lab and Soil Science Lab at The Morton Arboretum. For more information, see the CUFS website.
ILDNR/INAI Tree Cores (3.44162)
Date: 2012Creator: Fahey, Bob
Type: Dataset
Description:The dataset consists of nearly 200 tree cores from 11 different sites in northern and southern Illinois. Ring-widths were measured under magnification of a binocular microscope to the nearest 0.001 mm with a Velmex Unislide slide-stage micrometer interfaced with a computer and MeasureJ2X program.
Project conducted in 2012. Cores were collected in 1976 and 2008-2011.
Invasive Species Phenology (IMSA SIR 2017) (3.44164)
Date: 2017 – 2018Creator: Rollinson, Christine R.
Type: Dataset
Description:
Invasive and native forbs and shrubs were identified by Rollinson, Lie, and Dhyani, and Duckett in the King’s Grove area of the Hidden Lake Forest Preserve. Monitoring is primarily conducted by Liu and Dhyani. Forbs include invasive garlic mustard (Alliaria petiolata), geum, and ___. Shrubs include invasive buckthorn (Rhamnus cathartica), invasive honeysuckle (genus Lonicera), and black raspberry (Genus Rubus). Forb traits monitored include initial growth, leaves, flowers/flower buds, open flowers, fruits, ripe fruits, and recent fruit/seed drop. Shrub traits monitored include bud burst, leaves, leaf size, leaf color, leaf fall, flowers/flower buds, open flowers, pollen release, fruits, ripe fruits, and fruit/seed drop. Both forb and shrub monitoring follow National Phenology Network Protocols.
Northern Wisconsin and Michigan Tree Cores (3.44167)
Creator: Fahey, Bob
Type: Dataset
Description:The dataset contains tree ring measurements from approximately 360 trees from 10 sites in Wisconsin and Michigan.
Timing of stem growth for Oaks from around the world (3.44168)
Date: 2010 – 2018Creator: Rollinson, Christine R.
Type: Dataset
Description:Dendrometer band installation was performed by Rollinson and Duckett, and monitoring will be performed by these two along with volunteers. Installation protocols can be found here. Monitoring will be conducted once per week, year-round on 32 oak trees in The Morton Arboretum Oak Collection. Diameter at breast height (DBH) and circumference are measured at the time of dendrometer installation, and the weekly measurements will show the increase in circumference over time, which may be converted to diameter if necessary. Trees were selected that were native to the Chicago area of Illinois, were accessioned before the year 2000 so they would be large enough to install dendrometer bands, and had at least three individuals fitting the first two criteria. The English oak, Quercus robur, was also included.
Phenology of Oaks from around the world (3.44169)
Date: 2017 – 2018Creator: Rollinson, Christine R.
Type: Dataset
Description:Phenology monitoring is being conducted by Rollinson, Duckett, and multiple volunteers in the spring, summer, and fall beginning in 2017. The dataset currently includes 73 oak trees in The Morton Arboretum Oak Collection. Monitoring is conducted once per week, and traits monitored include bud burst, leaves, leaf size, leaf color, leaf fall, flowers/flower buds, open flowers, pollen release, fruits, ripe fruits, and fruit/seed drop. Monitoring follows National Phenology Network (NPN) protocols. Trees were selected to include up to three individuals, randomly selected, from major North American and European species.
Emergent climate and CO2 sensitivities of net primary productivity in ecosystem models do not agree with empirical data in temperate forests of eastern North America (3.55426)
Date: 2017Creator: Rollinson, Christine R.
Type: Article
Relative influences of multiple sources of uncertainty on cumulative and incremental tree-ring-derived aboveground biomass estimates (3.55439)
Date: 2017Creator: Rollinson, Christine R.
Type: Article
Ecosystem model simulations of effects of soil and fire on prairie-forest ecosystem states (3.57671)
Date: 2018 – 2019Type: Dataset
Description:In the Midwest, woodland and prairie ecosystems historically existed side-by-side, with sharp transitions between the two. Understanding how this boundary developed is crucial to understanding how climate change will affect this boundary. Fire, soil water holding capacity, and climate play major roles in ecosystem development on a global scale. However, their roles are difficult to discern at the local scale. We designed a factorial experiment that tested the effects of climate as a driver and two soil parameters that regulate fire events: texture, which regulates soil water holding capacity, and the moisture threshold, which prevents fire from occurring. We ran the model Ecosystem Demography 2.0 (ED2) for 500 years, allowing the ecosystems to self-assemble into a simplified grass-oak system via primary succession. With fire turned off, none of the ecosystems developed into a prairie. With fire turned on, the fire return interval varied between 1 and 8 years. Interestingly, a longer fire return interval of 7 to 8 years generated forested ecosystems in soils with a high water holding capacity and prairie ecosystems in soils with a low water holding capacity. This suggests that both fire and soil are important influences in the development of prairie ecosystems.
Determination of Death Dates of Coarse Woody Debris of Multiple Species in the Central Hardwood Region (Indiana, USA) (3.60012)
Date: 2018Creator: Rollinson, Christine R.
Type: Article
Drought timing and local climate determine the sensitivity of eastern temperate forests to drought (3.60063)
Date: 2018Creator: Rollinson, Christine R.
Type: Article
The Future of Trees: Hope in a Changing Climate (3.64161)
Date: 2018Creator: The Morton Arboretum
Type: Video
Tree Phenology (3.65047)
Date: August 28 2018Type: Video
Comparison of growth and recovery in response to drought stress across wood types (3.67072)
Date: 2019Type: Dataset
Description:Droughts are one of the major phenomena that affect the development and growth of trees. That is why this study was carried out in order to know which trees are more efficient at the time of recovery and continue to grow after having suffered a year of drought. To this end, samples were taken from the rings of 12 tree species found in The Morton Arboretum in Illinois. These were dried, assembled and sanded, to then facilitate the measurements of their widths for each year of rings, thus obtaining an average group of years where the trees were almost completely affected. After our initial belief that the non-porous trees were more suitable in times of drought, we found that porous trees, or even more specific diffuse trees, are more suitable in the event of droughts.
How do climate change experiments alter plot-scale climate? (3.85422)
Creator: Rollinson, Christine R.
Type: Article
Effects of climate on the growth response and anatomical tradeoffs of red and white oak (3.85993)
Date: August 16 2019Creator: Rollinson, Christine R.
Type: Document
Description:Poster presented by Jessica Oros, Ross Alexander, and Christy Rollinson at the Ecological Society of America Conference on August 16, 2019.
Overview: Oak, a ring porous genus, grows hollow xylem structures (vessels) for transporting water. Different species of oak, such as Quercus alba and Quercus rubra, may show variations in earlywood vessel size and density. We asked the question, “Do climate and management impact tradeoffs in vessel growth in these two species of oak?”
This document can be viewed digitally. To request digital access, contact the Sterling Morton Library staff by following the link here.
Forecasting tree phenology and climate vulnerability by leveraging botanic garden collections and citizen science observations (3.85994)
Date: August 13 2019Creator: Rollinson, Christine R., Zumwalde, Bethany , Reidy, Brendon
Type: Document
Description:Poster presented by Christine R. Rollinson, Bethany A. Zumwalde, and Brendon Reidy at the Ecological Society of America Conference on August 13, 2019.
Overview: Phenology has been widely used as a bioindicator of potential tree responses to climate change. Additionally, past studies have successfully modeled species distributions based on phenology because plants are unlikely to persist in a location if they are at high risk of freeze damage to leaves, flowers, or fruits. Large citizen science networks such as the USA National Phenology Network have increased the spatial distribution observations for many tree species, but are unable to robustly capture rare or threatened species having restricted or climate-sensitive distributions. Botanic gardens and arboreta help fill this gap by growing diverse arrays of species, often emphasizing preservation of rare species through taxonomically or geographically oriented collections. At The Morton Arboretum, we are combining phenology observations of tree species both in and outside of their natural habitats through volunteer and national citizen science efforts in order to better determine climatic constraints on tree species distributions. In 2017, we began to pilot these concepts through analyses of the genus Quercus (oaks) as one of the most broadly distributed and ecologically important taxa across the globe.
In 2017, we monitored leaf and reproductive phenology for 64 trees from 29 species of Quercus, which was then expanded to 234 trees representing 58 species in 2018. Due to a mild winter in 2017, the onset of budburst was nearly 3 weeks earlier in 2017 than in 2018, although the dates of peak fall color were similar across years. In both years, species showed a narrower range for date of first budburst than for peak fall color, suggesting more consistent cues for start of growing season in temperate deciduous oaks than for the end of season. In the future, we will use the phenological covariance among co-occurring or phylogenetically related species in botanic gardens and the USA National Phenology Network to better assess climate sensitivity and potential vulnerability of species of concern.
This document can be viewed digitally. To request digital access, contact the Sterling Morton Library staff by following the link here.
Christine Rollinson Press Release (3.90736)
Date: February 23 2017Type: Document
Fall Color Change Press Release (3.90890)
Date: October 8 2020Type: Document
Exploring Remotely Sensed Data as an Indicator of Phenological Sensitivity in Oaks (3.91114)
Date: 2020Type: Video
Description:Andrew Ernat, a student in the 2020 Research Experiences for Undergraduates (REU) program, giving the presentation "Exploring Remotely Sensed Data as an Indicator of Phenological Sensitivity in Oaks" as part of the 2020 REU Symposium.
Evergreen: The Virtual Gala for The Morton Arboretum (3.92698)
Date: September 12 2020Creator: The Morton Arboretum
Type: Video
Description:A video promoting The Morton Arboretum's efforts to encourage support from donors during the Evergreen Gala.
Researchers collecting tree cores (3.96868)
Creator: Midgley, Meghan G.
Type: Photographic image
Description:Researchers collecting tree cores