Belowground mechanism reveals climate change impacts on invasive clonal plant establishment
journal contributionposted on 2022-06-03, 02:19 authored by Surendra BamSurendra Bam, JP Ott, JL Butler, L Xu
Climate change and disturbance can alter invasion success of clonal plants by differentially affecting the clonal traits influencing their establishment as young plants. Clonal traits related to the vegetative reproduction of native Pascopyrum smithii and non-native Bromus inermis grass seedlings were evaluated under altered precipitation frequencies and a single grazing event. Pascopyrum smithii maintained similar vegetative reproduction under three simulated precipitation frequencies whereas B. inermis vegetative reproduction declined as precipitation became more intermittent. Vegetative reproduction of the non-native B. inermis was greater than the native P. smithii under all simulated precipitation frequencies except the most intermittent scenario. A single grazing event did not affect either species’ response to intra-annual precipitation variability but did slightly reduce their clonal growth and increase their bud dormancy. In young plants, clonal traits of the invasive grass favored its superior expansion and population growth compared to the native grass except under the most severe climate change scenario. Grassland restoration using native P. smithii seeds would be successful in most years due to its resilient clonal growth in a changing climate. Clonal infrastructure development in young plants is critical to clonal plant establishment and persistence in a changing climate and under disturbed conditions.
This research has been supported through the South Dakota Agriculture Experiment Station Hatch Project and the USDA Forest Service Rocky Mountain Research Station.
Article NumberARTN 2860
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Science & TechnologyMultidisciplinary SciencesScience & Technology - Other TopicsBUD BANK DYNAMICSSMOOTH BROMEECOSYSTEM PROCESSESNATIVE GRASSDROUGHTGROWTHINTEGRATIONINERMISTIMEAVAILABILITYBromusClimate ChangeEnvironmental Restoration and RemediationGrasslandIntroduced SpeciesPoaceaeRainSeedlingsEcological Applications not elsewhere classifiedEnvironmental Science and Management not elsewhere classifiedEcology