Species variability in the relative strength of intraspecific and interspecific interactions

Understanding cases in restoration and in agriculture in which species diversity improves productivity and ecosystem functioning is crucial due the need to restore degraded habitat and improve crop productivity for a growing human population. Reaching these diversity benefits is likely influenced by...

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Main Author: Foxx Alicia J.
Format: Article
Language:English
Published: Sciendo 2022-07-01
Series:Folia Oecologica
Subjects:
Online Access:https://doi.org/10.2478/foecol-2022-0019
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author Foxx Alicia J.
author_facet Foxx Alicia J.
author_sort Foxx Alicia J.
collection DOAJ
description Understanding cases in restoration and in agriculture in which species diversity improves productivity and ecosystem functioning is crucial due the need to restore degraded habitat and improve crop productivity for a growing human population. Reaching these diversity benefits is likely influenced by the dynamic of less negative interspecific than intraspecific interactions that promote diversity. But further testing is needed to understand the relationship of intraspecific-relative to interspecific interactions. Here I used seedlings from three native and one introduced species used in restoration in the western United States in pairwise interaction combinations and found that the study species varied in shoot biomass in response to interaction treatments of the control, intraspecific, and interspecific interactions (R2 = 0.7, p < 0.001), and that intraspecific interactions were more negative than interspecific interactions for four of five of the pairings. Overall, as shoot mass size differences increased between interspecific neighbors, interactions became more positive (R2 = 0.6, p < 0.001). These findings point to variability in species responses in whether the focal species compete more intensely with conspecific or heterospecific neighbors and indicates the need for more careful selection of interacting species for meeting both agricultural and restoration goals.
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spelling doaj.art-2a9f9d2daf0b499eaffc44d6bb4fbb1d2022-12-22T02:17:12ZengSciendoFolia Oecologica1338-70142022-07-0149216817410.2478/foecol-2022-0019Species variability in the relative strength of intraspecific and interspecific interactionsFoxx Alicia J.0Negaunee Institute for Plant Conservation Science and Action, The Chicago Botanic Garden, 1000 Lake Cook Road, Glencoe, IL, 60022, USAUnderstanding cases in restoration and in agriculture in which species diversity improves productivity and ecosystem functioning is crucial due the need to restore degraded habitat and improve crop productivity for a growing human population. Reaching these diversity benefits is likely influenced by the dynamic of less negative interspecific than intraspecific interactions that promote diversity. But further testing is needed to understand the relationship of intraspecific-relative to interspecific interactions. Here I used seedlings from three native and one introduced species used in restoration in the western United States in pairwise interaction combinations and found that the study species varied in shoot biomass in response to interaction treatments of the control, intraspecific, and interspecific interactions (R2 = 0.7, p < 0.001), and that intraspecific interactions were more negative than interspecific interactions for four of five of the pairings. Overall, as shoot mass size differences increased between interspecific neighbors, interactions became more positive (R2 = 0.6, p < 0.001). These findings point to variability in species responses in whether the focal species compete more intensely with conspecific or heterospecific neighbors and indicates the need for more careful selection of interacting species for meeting both agricultural and restoration goals.https://doi.org/10.2478/foecol-2022-0019ex-situforbsinteractionsnative plantsshoot mass
spellingShingle Foxx Alicia J.
Species variability in the relative strength of intraspecific and interspecific interactions
Folia Oecologica
ex-situ
forbs
interactions
native plants
shoot mass
title Species variability in the relative strength of intraspecific and interspecific interactions
title_full Species variability in the relative strength of intraspecific and interspecific interactions
title_fullStr Species variability in the relative strength of intraspecific and interspecific interactions
title_full_unstemmed Species variability in the relative strength of intraspecific and interspecific interactions
title_short Species variability in the relative strength of intraspecific and interspecific interactions
title_sort species variability in the relative strength of intraspecific and interspecific interactions
topic ex-situ
forbs
interactions
native plants
shoot mass
url https://doi.org/10.2478/foecol-2022-0019
work_keys_str_mv AT foxxaliciaj speciesvariabilityintherelativestrengthofintraspecificandinterspecificinteractions