8 Works

Data from: Potential contributions of root decomposition to the nitrogen cycle in arctic forest and tundra

Sabrina Träger, Ann Milbau & Scott D. Wilson
1. Plant contributions to the nitrogen (N) cycle from decomposition are likely to be altered by vegetation shifts associated with climate change. Roots account for the majority of soil organic matter input from vegetation, but little is known about differences between vegetation types in their root contributions to nutrient cycling. Here, we examine the potential contribution of fine roots to the N cycle in forest and tundra to gain insight into belowground consequences of the...

Data from: Root phenology unresponsive to earlier snowmelt despite advanced aboveground phenology in two subarctic plant communities

Gesche Blume-Werry, Roland Jansson & Ann Milbau
Earlier snowmelt at high latitudes advances aboveground plant phenology, thereby affecting water, nutrient and carbon cycles. Despite the key role of fine roots in these ecosystem processes, phenological responses to earlier snowmelt have never been assessed belowground. We experimentally advanced snowmelt in two contrasting plant community types, heath and meadow, in northern Sweden and measured above- and belowground phenology: leaf-out, flowering and fine root growth. We expected earlier snowmelt to advance both above- and belowground...

Data from: Microclimate variability in alpine ecosystems as stepping stones for non-native plant establishment above their current elevational limit

Jonas J. Lembrechts, Jonathan Lenoir, Martin A. Nuñez, Aníbal Pauchard, Charly Geron, Gilles Bussé, Ann Milbau & Ivan Nijs
Alpine environments are currently relatively free from non-native plant species, although their presence and abundance have recently been on the rise. It is however still unclear whether the observed low invasion levels in these areas are due to an inherent resistance of the alpine zone to invasions or whether an exponential increase in invasion is just a matter of time. Using a seed-addition experiment on north- and south-facing slopes (cf. microclimatic gradient) on two mountains...

Data from: Winter warming effects on tundra shrub performance are species-specific and dependent on spring conditions

Eveline J. Krab, Jonas Rönnefarth, Marina Becher, Gesche Blume-Werry, Frida Keuper, Jonatan Klaminder, Juergen Kreyling, Kobayashi Makoto, Ann Milbau, Ellen Dorrepaal & Jonas Roennefarth
1. Climate change driven increases in winter temperatures positively affect conditions for shrub growth in arctic tundra by decreasing plant frost damage and stimulation of nutrient availability. However, the extent to which shrubs may benefit from these conditions may be strongly dependent on the following spring climate. Species-specific differences in phenology and spring frost sensitivity likely affect shrub growth responses to warming. Additionally, effects of changes in winter and spring climate may differ over small...

Data from: Trophic consequences of introduced species: comparative impacts of increased inter-specific versus intra-specific competitive interactions

Robert J. Britton, Ana Ruiz-Navarro, Hugo Verreycken, Fatima Amat Trigo & Fatima Amat-Trigo
1. Invasive species can cause substantial ecological impacts on native biodiversity. Whilst ecological theory attempts to explain the processes involved in the trophic integration of invaders into native food webs and their competitive impacts on resident species, results are equivocal. In addition, quantifying the relative strength of impacts from non-native species (inter-specific competition) versus the release of native conspecifics (intra-specific competition) is important but rarely completed. 2. Two model non-native fishes, the globally invasive Cyprinus...

Data from: Effect of the landscape matrix on gene flow in a coastal amphibian metapopulation

Karen Cox, Joke Maes, Hans Van Calster & Joachim Mergeay
Functional connectivity is crucial for the persistence of a metapopulation, because migration among subpopulations enables recolonization and counteracts genetic drift, which is especially important in small subpopulations. We studied the degree and drivers of connectivity among occupied patches of a coastal dune metapopulation of the Natterjack Toad (Epidalea calamita Laurenti), on the basis of microsatellite variation. As spatial landscape heterogeneity is expected to influence dispersal and genetic structure, we analyzed which landscape features affect functional...

Data from: Founder effects determine the genetic structure of the water flea Daphnia in Ethiopian reservoirs

Tsegazeabe Hadush Haileselasie, Joachim Mergeay, Joost Vanoverbeke, Luisa Orsini & Luc De Meester
Founder effects introduce stochasticity in the genetic structure of species at the regional scale. To the extent that founder effects are important, they will result in a reduced signature of space, time, and environmental variation in landscape genetic data. We studied the metapopulation genetic structure of recently founded populations of the microcrustacean Daphnia sinensis in 10 Ethiopian water reservoirs. We used three different approaches to estimate the number of effective founders and applied them to...

Data from: Immigrant and extrinsic hybrid seed inviability contribute to reproductive isolation between forest and dune ecotypes of Epipactis helleborine (Orchidaceae)

Hans Jacquemyn, Hanne De Kort, An Vanden Broeck & Rein Brys
Reproductive isolation caused by divergent natural selection arising from differences between ecological environments or ecological interactions represents a major mechanism contributing to speciation, but its relative importance is poorly known. In this study, controlled reciprocal crossings and seed germination experiments were combined with genetic and morphometric analyses to test the hypothesis that previously described differences in mycorrhizal communities between forest and dune ecotypes of Epipactis helleborine were sufficiently strong to create complete reproductive isolation between...

Registration Year

  • 2017
    8

Resource Types

  • Dataset
    8

Affiliations

  • Research Institute for Nature and Forest
    8
  • Umeå University
    3
  • University of Antwerp
    2
  • Centre national de la recherche scientifique
    1
  • University of Picardie Jules Verne
    1
  • French National Institute for Agricultural Research
    1
  • Hokkaido University
    1
  • Swedish University of Agricultural Sciences
    1
  • National University of Comahue
    1
  • University of Birmingham
    1