Tue, Aug 16, 2022: 1:30 PM-3:00 PM
520D
Organizer:
Amber C. Churchill
Co-Organizer:
Maggie Anderson
Moderator:
Amber C. Churchill
Grassland and open-ecosystems are threatened by land-use change in addition to numerous less direct human impacts. These impacts have important implications for the multitude of key ecosystem services provided by these diverse ecosystems, including forage for cattle and herbivores, pollinator resources, support for biodiversity, carbon sequestration, recreation, among others. Despite the range of services provided by grasslands, these open-ecosystems are often treated as non-forested or simply ecosystems without trees rather than explored as uniquely functioning biomes with discrete drivers and ecosystem functions. There is a great diversity among grasslands, despite frequent aggregation to a single plant functional type within global analyses, and this high variability remains one of the limitations in accurately predicting grassland ecosystem functions and responses under future climate scenarios. As in many terrestrial ecosystems, warming and drought associated with climate change are projected to impact the phenology of grasslands around the world. These impacts have direct economic implications for many ecosystem services, such as changes in productivity and access to forage for livestock as well as changes in the timing of pollinator resources. Consequently, efforts to understand the drivers impacting diverse grassland responses are of international importance. Unlike many forested systems, where broad patterns of phenology are driven by seasonal progression from budburst and leaf absecsion, grassland phenology is more dynamic- with key drivers relating to soil moisture and the timing of precipitation as well as grazing and land-use that can influence patterns of new growth throughout the active growing season. Importantly, the length of the active growing season also differs among grassland systems dramatically, from high elevation alpine meadows with short 2-3 month summers to year-round growth in tropical and subtropical grasslands. This diverse range of grasslands have different drivers of phenology, and more global understanding is needed to accurately understand the relative impact of changes in climate factors such as warming relative to changes in water availability. This session aims to review the consequences on phenology and associated patterns in productivity for changes in climate among diverse grasslands around the globe.
1:45 PM
Drought legacy effects on plant phenology: exploring how shifts in plant communities alter vegetation green-period Kevin Wilcox, PhD, Program in Ecology, University of Wyoming;Sally E. Koerner, PhD, University of North Carolina Greensboro;Kevin P. Kirkman, PhD, University of KwaZulu Natal;Scott L. Collins, University of New Mexico;Alan K. Knapp, Colorado State University;Melinda D. Smith, Colorado State University;Dave Thompson, South African Environmental Observation Network; 2:00 PM
Green-up and brown-down: Modelling grassland foliage phenology responses to soil water availability in eastern Australia Jinyan Yang, Hawkesbury Institute for the Environment, Western Sydney University;Belinda E. Medlyn, Western Sydney University;Craig Barton, Western Sydney University;Amber C. Churchill, Cedar Creek Ecosystem Science Reserve, Department of Ecology, Evolution and Behavior, University of Minnesota;Martin De Kauwe, University of bristol;Mingkai jiang, Zhejiang University;Arjunan Krishnananthaselvan, University of Vavuniya;David Tissue, Western Sydney University;Elise Pendall, Western Sydney University;Sally a. A. Power, Western Sydney University; 2:45 PM
Phenological convergence over space and time: Shifts in tundra phenology with long-term and experimental warming Janet Prevey, USGS;Sarah C. Elmendorf, University of Colorado, Boulder;Anne Bjorkman, Department of Biological and Environmental Sciences, University of Gothenburg, SE-405 30 Gothenburg, Sweden, Gothenburg Global Biodiversity Centre, SE-405 30 Gothenburg, Sweden;Juha M. Alatalo, Environmental Science Center, Qatar University, Doha, Qatar;isabel Ashton, National Park Service, 820 Columbus Street, Rapid City, SD 57701, USA.;Jakob J. Assmann, Department of Biology, Aarhus University, DK-8000 Aarhus C, Denmark;Robert G. Björk, Gothenburg Global Biodiversity Centre, SE-405 30 Gothenburg, Sweden; Department of Earth Sciences, University of Gothenburg, PO Box 460, SE-405 30 Gothenburg, Sweden;Mats P. Björkman, Gothenburg Global Biodiversity Centre, SE-405 30 Gothenburg, Sweden; Department of Earth Sciences, University of Gothenburg, PO Box 460, SE-405 30 Gothenburg, Sweden;Nicoletta Cannone, Department of Science and High Technology, Università degli Studi dell’Insubria, 2210 Como, Italy;Michele Carbognani, Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 11/A, I-43124 Parma, Italy;Chelsea Chisholm, Institute of Integrative Biology, ETH Zurich, Universitätstrasse 16, Zurich 8092, Switzerland;Karin Clark, PO Box 1320, Yellowknife, NT X1A 2L9, Canada;Courtney G. Collins, University of British Columbia;Elisabeth J. Cooper, Department of Arctic and Marine Biology, Faculty of Biosciences, Fisheries and Economics, UiT-The Arctic University of Norway, N-9037 Tromsø, Norway;Bo Elberling, Center for Permafrost (CENPERM), Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Voldgade 10, 1350 Copenhagen K, Denmark;Esther R. Frei, WSL Institute for Snow and Avalanche Research SLF, Fluelastrasse 11, 7260 Davos Dorf, Switzerland;Greg R.H. Henry, University of British Columbia;Robert D. Hollister, Biology Department, Grand Valley State University, Allendale, MI 49401-9403, USA;Toke T. Høye, Department of Bioscience and Arctic Research Centre, Aarhus University, Grenåvej 14, 8410 Rønde, Denmark;Ingibjörg Jónsdóttir, University of Iceland; 