BarrioLindenTeBeestEtAl2017

Référence

Barrio, I.C., Lindén, Elin, Te Beest, M., Olofsson, J., Rocha, A., Soininen, E.M., Alatalo, J.M., Andersson, T., Asmus, A., Boike, J., Brathen, K.A., Bryant, J.P., Buchwal, A., Bueno, C. G., Christie, K.S., Denisova, Y.V., Egelkraut, D., Ehrich, D., Fishback, L., Forbes, B.C., Gartzia, M., Grogan, P., Hallinger, M., Heijmans, M.M.P.D., Hik, D.S., Hofgaard, A., Holmgren, M., Hoye, T.T., Huebner, D.C., Jonsdottir, I.S., Kaarlejarvi, E., Kumpula, T., Lange, C.Y.M.J.G., Lange, J., Lévesque, E., Limpens, J., Macias-Fauria, M., Myers-Smith, I., van Nieukerken, E.J., Normand, S., Post, E.S., Schmidt, N.M., Sitters, J., Skoracka, A., Sokolov, A., Sokolova, N., Speed, J.D.M., Street, L.E., Sundqvist, M.K., Suominen, O., Tananaev, N., Tremblay, J.-P., Urbanowicz, C., Uvarov, S.A., Watts, D., Wilmking, M., Wookey, P.A., Zimmermann, H.H., Zverev, V. and Kozlov, M.V. (2017) Background invertebrate herbivory on dwarf birch (Betula glandulosa-nana complex) increases with temperature and precipitation across the tundra biome. Polar Biology, 40(11):2265-2278. (URL )

Résumé

Chronic, low intensity herbivory by invertebrates, termed background herbivory, has been understudied in tundra, yet its impacts are likely to increase in a warmer Arctic. The magnitude of these changes is however hard to predict as we know little about the drivers of current levels of invertebrate herbivory in tundra. We assessed the intensity of invertebrate herbivory on a common tundra plant, the dwarf birch (Betula glandulosa-nana complex), and investigated its relationship to latitude and climate across the tundra biome. Leaf damage by defoliating, mining and gall-forming invertebrates was measured in samples collected from 192 sites at 56 locations. Our results indicate that invertebrate herbivory is nearly ubiquitous across the tundra biome but occurs at low intensity. On average, invertebrates damaged 11.2% of the leaves and removed 1.4% of total leaf area. The damage was mainly caused by external leaf feeders, and most damaged leaves were only slightly affected (12% leaf area lost). Foliar damage was consistently positively correlated with mid-summer (July) temperature and, to a lesser extent, precipitation in the year of data collection, irrespective of latitude. Our models predict that, on average, foliar losses to invertebrates on dwarf birch are likely to increase by 6–7% over the current levels with a 1 °C increase in summer temperatures. Our results show that invertebrate herbivory on dwarf birch is small in magnitude but given its prevalence and dependence on climatic variables, background invertebrate herbivory should be included in predictions of climate change impacts on tundra ecosystems.

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@ARTICLE { BarrioLindenTeBeestEtAl2017,
    AUTHOR = { Barrio, I.C. and Lindén, Elin and Te Beest, M. and Olofsson, J. and Rocha, A. and Soininen, E.M. and Alatalo, J.M. and Andersson, T. and Asmus, A. and Boike, J. and Brathen, K.A. and Bryant, J.P. and Buchwal, A. and Bueno, C. G. and Christie, K.S. and Denisova, Y.V. and Egelkraut, D. and Ehrich, D. and Fishback, L. and Forbes, B.C. and Gartzia, M. and Grogan, P. and Hallinger, M. and Heijmans, M.M.P.D. and Hik, D.S. and Hofgaard, A. and Holmgren, M. and Hoye, T.T. and Huebner, D.C. and Jonsdottir, I.S. and Kaarlejarvi, E. and Kumpula, T. and Lange, C.Y.M.J.G. and Lange, J. and Lévesque, E. and Limpens, J. and Macias-Fauria, M. and Myers-Smith, I. and van Nieukerken, E.J. and Normand, S. and Post, E.S. and Schmidt, N.M. and Sitters, J. and Skoracka, A. and Sokolov, A. and Sokolova, N. and Speed, J.D.M. and Street, L.E. and Sundqvist, M.K. and Suominen, O. and Tananaev, N. and Tremblay, J.-P. and Urbanowicz, C. and Uvarov, S.A. and Watts, D. and Wilmking, M. and Wookey, P.A. and Zimmermann, H.H. and Zverev, V. and Kozlov, M.V. },
    TITLE = { Background invertebrate herbivory on dwarf birch (Betula glandulosa-nana complex) increases with temperature and precipitation across the tundra biome },
    JOURNAL = { Polar Biology },
    YEAR = { 2017 },
    VOLUME = { 40 },
    NUMBER = { 11 },
    PAGES = { 2265--2278 },
    MONTH = { Nov },
    ISSN = { 1432-2056 },
    ABSTRACT = { Chronic, low intensity herbivory by invertebrates, termed background herbivory, has been understudied in tundra, yet its impacts are likely to increase in a warmer Arctic. The magnitude of these changes is however hard to predict as we know little about the drivers of current levels of invertebrate herbivory in tundra. We assessed the intensity of invertebrate herbivory on a common tundra plant, the dwarf birch (Betula glandulosa-nana complex), and investigated its relationship to latitude and climate across the tundra biome. Leaf damage by defoliating, mining and gall-forming invertebrates was measured in samples collected from 192 sites at 56 locations. Our results indicate that invertebrate herbivory is nearly ubiquitous across the tundra biome but occurs at low intensity. On average, invertebrates damaged 11.2% of the leaves and removed 1.4% of total leaf area. The damage was mainly caused by external leaf feeders, and most damaged leaves were only slightly affected (12% leaf area lost). Foliar damage was consistently positively correlated with mid-summer (July) temperature and, to a lesser extent, precipitation in the year of data collection, irrespective of latitude. Our models predict that, on average, foliar losses to invertebrates on dwarf birch are likely to increase by 6–7% over the current levels with a 1 °C increase in summer temperatures. Our results show that invertebrate herbivory on dwarf birch is small in magnitude but given its prevalence and dependence on climatic variables, background invertebrate herbivory should be included in predictions of climate change impacts on tundra ecosystems. },
    DAY = { 01 },
    DOI = { 10.1007/s00300-017-2139-7 },
    URL = { https://doi.org/10.1007/s00300-017-2139-7 },
}

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