Here, I found that juvenile radial growth was faster under the canopy of mature trees than in the neighborhood of similar sized juveniles at the two lowest density classes, 7 and 20 m²/ha. Kin recognition was also weakly evident in the field, where it was expressed as differential survivorship among kin versus non-kin seedlings. I also found that at the highest density class, there were no differences in juvenile radial growth between the two neighbor strata. Suzanne Simard, Professor of Forestry at the University of British Columbia, is an expert in the synergies and complexities of forests and the development of sustainable forest stewardship practices. Year; Net transfer of carbon between ectomycorrhizal tree species in the field. Her 30 years of research in Canadian forests have led to an astounding discovery -- trees talk, often and over vast distances. Assignment 1: Students will write a reflective essay about the interactions between ecology, resilience and adaptability (~500 words). View Suzanne Simard's business profile as Professor (Tenure) at The University of British Columbia. Mycorrhization of western hemlock seedlings did not differ between forest clearcut type or treatment group; however, an inhibitory effect of forest floor collected under mature western redcedar trees on the growth of western hemlock seedlings was unexpectedly detected. Franco) forests across a biogeographic gradient in Western Canada. Suzanne Simard (UBC) is a leading world expert in forest ecology … 2424 Main Mall. “Forests aren’t simply a collection of trees,” said the ecologist Suzanne Simard during her recent TED Talk. The highest biomass accumulation and foliar nitrogen content occurred in the high severity burn and were associated with the lowest levels of mycorrhizal colonization and diversity. You can find all of our episodes here. UBC Faculty of Forestry. TED Radio Hour (3:15 mark) The sooner the better for this powerful vaccine. Twenty-one years after the experiments were established, I found strong evidence of reduced Armillaria root disease and increased foliar nutrition in interior Douglas-fir with increasing density of paper birch neighbours, but no negative effect of paper birch competition on interior Douglas-fir growth. Greater understanding of mycorrhizae has the potential to improve our multi-faceted relationships with the ecosystems upon which we depend.View record, Growing mixed conifer-broadleaf forests instead of monoculture coniferous forests could reduce problems with seedling regeneration, disease and volume loss, all of which are expected to increase with warmer climates and more frequent droughts. I conclude that western hemlock regeneration on nurse-logs is facilitated by mycorrhizal networks of canopy trees in an old-growth forest of coastal British Columbia.View record, There is growing concern about the long term productivity of forests in British Columbia due to changing climatic conditions. My objectives were (1) to determine the effects of regional climate (represented by a drought index) on EM network facilitation of Douglas-fir seedling establishment; (2) to separate genotypic effects from climatic effects; (3) to compare the importance of EM networks to 3-year-old outplanted nursery seedlings versus 1st year seedlings germinated in the field; (4) to parse the competitive from facilitative effects of residual Douglas-fir trees on small seedlings; and (5) to determine the interaction between soil water and [CO₂], in their effects on EM network-facilitated seedling establishment and C-transfer between different sized Douglas-fir seedlings. After 24 and 48 hrs, I measured expression of two regulatory genes on the jasmonate and ethylene pathways. Leader of The Mother Tree Project, Department of Forest and Conservation Sciences, Forest Sciences Centre 3601 ubc.ca. I show that MNs exist in tundra and facilitate transfer of C among Betula nana individuals, but not among the other plants examined. It can be a major component of stands found within the Thompson Dry Mild variant of the Montane Spruce ecological zone (MSdm2) in the southern interior of British Columbia, Canada. A total of 108 samples were collected from the FH (fermented and humus layers), 0-10 cm (A horizon) and 10-20 cm (B horizon) layers in 36 plots, 18 stumped and 18 unstumped, that were planted with pure stands and admixtures of Douglas-fir, western redcedar and paper birch. Bacterial α-diversity in the B horizon declined with stumping, irrespective of tree species, and also tended to decrease in the A horizon. Department of Forest & Conservation Sciences, Promoting Excellence in Graduate Programs, Supporting Student Development and Success. Last updated: October 1, 2020 @12:30 pm Together, these results strongly suggest that soil microbes play a critical role in plant community dynamics and C-cycling in Arctic tundra, and that this role will become increasingly important as climate warms.View record, Light availability in forest understories is a well recognized constraint on sapling growth, but limitations in soil nitrogen (N) availability, and the link to foliar photosynthetic capacity, typically receive less consideration in describing stand dynamics. My study shows that regeneration potential of interior Douglas-fir is severely limited by the very dry, hot climate in the low elevation IDF forests, but can be increased in wetter, cooler climates with forest harvesting practices that create moderately sized canopy gaps.View record, The majority of terrestrial plants associate with fungi in symbiotic resource-exchange relationships called mycorrhizae. To accomplish this, I pulse-labeled ¹³C-glucose solution into the phloem of mature trees. Natural regeneration potential was assessed by measuring seedling performance and mycorrhizal diversity over a three-year period. This study examined the socio-spatial architecture of MNs between Rhizopogon spp. Suzanne W. Simard's 12 research works with 34 citations and 1,863 reads, including: Diverging distribution of seedlings and mature trees reflects recent climate change in British Columbia As a consequence, trait-based plant ecology, which has mostly focused on above-ground traits, is increasingly placing the emphasis below-ground.To improve our functional understanding of fine roots, we first quantified root morphological, chemical and architectural trait variation in interior Douglas-fir (Pseudotsuga menziesii var. She contributes to this goal by co… SIMARD, Suzanne. She's been among my favourite professors since starting at UBC. Group-project Module (weeks 4-6): Each group will involve approximately five students, depending on the class size. Verified email at ubc.ca - Homepage. An information source that gives journalists access to UBC's expertise. Simard’s research focuses on plant-soil microbial interactions, forest stand dynamics, forest disturbances and the effects of climate change on these processes. Tropical Forestry and Food Security. I show that Gram-negative bacteria and a species-specific community of mycorrhizal fungi are the primary consumers of rhizodeposit C among tundra shrubs. View all experts | View all fields. Forest Ecology and Silvics BSF (’83) Brit Col, MS (’89), PhD (’95) Oregon. These exploratory results suggest positive potential for action-based plant-oriented digital games in the higher education classrooms. This led me to conclude that: 1) light availability had the largest influence on juvenile tree growth; 2) Delta-13C was the second most important growth predictor; 3) tree size also improved growth predictions; 4) soil moisture was a weak growth predictor; 5) foliar N levels did not improve growth predictions; and 6) density, as expressed as stems/ha, improved growth predictions negligibly. However, lower student interest in plants and fungi combined with difficulties visualizing belowground processes present challenges for teaching and learning mycorrhizal concepts. This model was then incorporated into SORTIE-ND as a new juvenile growth behavior, “Juvenile NCI Growth”, and used to test whether juvenile or mature trees have a greater competitive influence on juvenile subalpine fir growth under three basal area classes. My research suggests that clearcutting and slashburning do not alone alter the diversity or function of mesic ESSF, SBS and ICH forests; however, past and future anthropogenic disturbances combined with non-historical climate and interrelated edaphic factors may place long-term stability of these ecosystems at risk.View record, Subalpine fir (Abies lasiocarpa (Hook.) In the FH horizon, the relative abundance of the saprotrophic fungal community declined while that of ectomycorrhizal (ECM) fungal community increased with stumping. Our results could have important forest management implications, particularly surrounding the concepts of legacy trees and natural regeneration of the locally adapted seed they produce, maintaining access to mycorrhizal associations and networks and the potential for family substructuring. The Simard Lab. Title. In four experiments in the tundra, I address critical gaps in our understanding of the role of soil microbial communities in the response of an Arctic ecosystem to climate change. http://www.vimeo.com/84971413 #UBC I found that site series did have an influence on the growth and development of the stand, as would be expected, which suggests that incorporating site quality into SORTIE-ND would improve growth and yield predictions.View record, Mycorrhizal networks (MNs) can influence tree establishment and resource competition but little is known regarding their underlying architecture in situ. Data was analyzed using linear mixed effects models. Mission & Vision; Facilities; ... Simard Lab. Les résultats de ces expériences ont eu un fort impact après leur publication. Suzanne Simard is a professor of forest ecology and teaches at the University of British Columbia.. She is a biologist and has tested theories about how trees communicate with other trees. I investigated the defense pathways involved in defense-related signal transfer in ectomycorrhizal systems. The simplification of the ectomycorrhizal community did not negatively affect seedling growth or survival. Both species were associated with moist microsites within plots, and had more prolific mycelia in mesic compared to xeric plots. She can be heard giving talks for TED and Radiolab. CORONAVIRUS (COVID-19): please review UBC’s general information and FAQs and G+PS's graduate student-specific information. To address this, I co-created the digital plant-centric action-based game Shroomroot for use in lower level postsecondary settings. Canada, The Mother Tree Project CurrentMay, 2017 – May, 2019, Forest Enhancement Society of British Columbia (Roach, Simard), Designing successful forest renewal practices for our changing climate CurrentSeptember, 2015 – August, 2019, NSERC SPG (Simard, Roach, Pickles, Lavkulich, Mohn, Pither), Plantmycorrhizal fungal interaction networks: understanding their role in the resilience and adaptation of forests to climate change CurrentApril, 2016 – March, 2021, The Salmon Forest Project CurrentMay, 2017 – May, 2019, Donner Canadian Foundation (Simard, Ryan), Using the functional traits of soil fungi to improve post-disturbance pine regeneration CurrentMay, 2015 – May, 2018, NSERC SPG (Erbigin, Cahill, Karst, Simard), Forest stand dynamics (regeneration, growth, mortality), Complex adaptive systems and ecological resilience. is the climax tree species in most of the low elevation Pacific northwest coastal forests. No alternative ectomycorrhizal host species were detected. Positive interactions can come in the shape of intraspecific interactions such as kin selection, or interspecific interactions, such a mycorrhizal symbiosis. Chapter 4 was designed to test the influence of site series on growth predictions using SORTIE-ND. Molecules potentially involved in defense signaling were identified using liquid chromatography coupled with mass spectroscopy. Suzanne Simard, Professor of Forestry at the University of British Columbia, is an expert in the synergies and complexities of forests and the development of sustainable forest stewardship practices. This body of work proposes a specific approach to studying resilience and applied it to Interior Cedar-Hemlock (ICH), Sub-Boreal Spruce (SBS) and Engelmann Spruce-Subalpine Fir (ESSF) forests extending across central British Columbia, Canada. This study examined effects of climate, CO₂ concentration ([CO₂]), and EM networks on Douglas-fir seedling establishment. 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