Journal of Vegetation Science

Cover image for Vol. 23 Issue 3

June 2012

Volume 23, Issue 3

Pages 395–604

  1. Original Articles

    1. Top of page
    2. Original Articles
    3. Forum Articles
    1. Mapping plant strategy types using remote sensing (pages 395–405)

      Sebastian Schmidtlein, Hannes Feilhauer and Helge Bruelheide

      Article first published online: 29 NOV 2011 | DOI: 10.1111/j.1654-1103.2011.01370.x

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      The three primary plant strategies proposed by Phil Grime (competitive ability, adaptation to severe stress and adaptation to disturbance) can be mapped using airborne imaging spectroscopy. This provides the opportunity to assess spatial patterns in ecosystem functioning. The approach works because strategies are closely linked to plant traits and canopy properties with relevance to reflectance.

    2. A novel method for extracting green fractional vegetation cover from digital images (pages 406–418)

      Yaokai Liu, Xihan Mu, Haoxing Wang and Guangjian Yan

      Article first published online: 19 DEC 2011 | DOI: 10.1111/j.1654-1103.2011.01373.x

    3. Too good to be true: pitfalls of using mean Ellenberg indicator values in vegetation analyses (pages 419–431)

      David Zelený and André P. Schaffers

      Article first published online: 29 NOV 2011 | DOI: 10.1111/j.1654-1103.2011.01366.x

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      Mean Ellenberg indicator values (EIVs) inherit information about compositional similarity, because their calculation is based on species composition. As a result, vegetation analyses correlating mean EIVs with other aspects of species composition are biased toward more optimistic results. We discuss the consequences of this bias, how often are biased results published and a remedy represented by modified permutation test.

    4. Species traits weakly involved in plant responses to landscape properties in Mediterranean grasslands (pages 432–442)

      Guillem Bagaria, Joan Pino, Ferran Rodà and Moisès Guardiola

      Article first published online: 9 NOV 2011 | DOI: 10.1111/j.1654-1103.2011.01363.x

      We examined the role of landscape properties and plant traits in species responses to habitat loss in Mediterranean grasslands. We found that plants seem to respond quickly, since no effect of past landscape structure was detected in current species frequencies after 50 years. Moreover, plant traits did not play a major role in mediating species response to environmental variation.

    5. Responses of riparian guilds to flow alterations in a Mediterranean stream (pages 443–458)

      María Dolores Bejarano, Marta González del Tánago, Diego García de Jalón, Miguel Marchamalo, Álvaro Sordo-Ward and Joaquín Solana-Gutiérrez

      Article first published online: 10 NOV 2011 | DOI: 10.1111/j.1654-1103.2011.01360.x

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      This article shows the opposite effects of flow alterations on Mediterranean riparian guilds according to the species flow-related attributes. Whereas the ability to survive water stress and to drag forces caused by floods favor the expansion of pioneer shrub-dominated guilds, the recruitment of native late-successional tree guilds which are sensitive to floods and have greater water requirements is limited after damming.

    6. Fine-scale distribution and abundance of epiphytic lichens: environmental filtering or local dispersal dynamics? (pages 459–470)

      Fride Høistad Schei, Hans H. Blom, Ivar Gjerde, John-Arvid Grytnes, Einar Heegaard and Magne Sætersdal

      Article first published online: 22 NOV 2011 | DOI: 10.1111/j.1654-1103.2011.01368.x

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      This paper examines fine-scale distribution and abundance patterns of epiphytic lichens in ten forest stands, and finds both environmental filtering and local dispersal to be highly important. However, the relative importance of these two structuring mechanisms varies among sites, and highlights the importance of multiple study sites for the evaluation of the role of different processes in shaping fine-scale patterns.

    7. Small-scale spatial autocorrelation in plant communities: the effects of spatial grain and measure of abundance, with an improved sampling scheme (pages 471–482)

      Cailin M. Roe, Graham C. Parker, Annika C. Korsten, Christina J. Lister, Sam B. Weatherall, Rachael H.E. Lawrence Lodge and J. Bastow Wilson

      Article first published online: 19 DEC 2011 | DOI: 10.1111/j.1654-1103.2011.01375.x

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      A new triangle-of-lines sampling method for spatial-autocorrelation studies gives accurate placement, and a good distribution of distances. In a riverbed, bog, forest and ultramafic shrubland, community composition was more predictable at larger spatial grain, i.e. spatial autocorrelation was stronger, with less randomness in species composition. There was little indication of greater predictability of abundance composition.

    8. Patterns of plant community assembly in invaded and non-invaded communities along a natural environmental gradient (pages 483–494)

      Riccardo Santoro, Tommaso Jucker, Marta Carboni and Alicia T.R. Acosta

      Article first published online: 24 NOV 2011 | DOI: 10.1111/j.1654-1103.2011.01372.x

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      We investigated the effects of plant invasion on community assembly patterns in coastal dune communities in the context of the Stress Gradient Hypothesis. Co-occurrence indices, alongside null models, revealed a transition from aggregation to segregation of species along the sea-inland gradient. In contrast, invasion was associated with a shift to random co-occurrence patterns, interpretable as a collapse in community structure.

    9. Grass litter is a natural seed trap in long-term undisturbed grassland (pages 495–504)

      Eszter Ruprecht and Anna Szabó

      Article first published online: 15 DEC 2011 | DOI: 10.1111/j.1654-1103.2011.01376.x

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      We analyzed the seed content of litter and underlying soil in dry grassland sites having different disturbance histories and thus different quantities of litter. Grass litter was proved to represent a natural trap for seeds, and there was a mass effect in the seed trapping by litter. Seeds retained were larger, more rounded and bearing appendages.

    10. Consistent seed bank spatial structure across semi-natural habitats determines plot sampling (pages 505–516)

      Jan Plue and Martin Hermy

      Article first published online: 10 NOV 2011 | DOI: 10.1111/j.1654-1103.2011.01361.x

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      Fine-scale spatial seed bank structure was detected in all plots of three semi-natural habitats, with spatial dependence between observations of 30cm. Adding knowledge on species-area relations within these plots, we developed a new seed bank sampling design, tailored to the specific needs individual researchers may have. This design may significantly increase the comparability among future seed bank community studies.

    11. Post-dispersal probability of germination and establishment on the shorelines of slow-flowing or stagnant water bodies (pages 517–525)

      Judith M. Sarneel and Merel B. Soons

      Article first published online: 21 NOV 2011 | DOI: 10.1111/j.1654-1103.2011.01367.x

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      It is important to link seed dispersal patterns to ensuing germination and establishment. We show that pioneer species of fen pond shorelines have a more successful recruitment on upwind or lee-side shorelines despite lower seed inputs there. At (downwind) sites with high seed inputs, a high probability to wash away into the open water strongly limits recruitment.

    12. Community-level seedling dynamics in Mediterranean forests: uncoupling between the canopy and the seedling layers (pages 526–540)

      Ignacio M. Pérez-Ramos and Teodoro Marañón

      Article first published online: 21 NOV 2011 | DOI: 10.1111/j.1654-1103.2011.01365.x

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      We present the results of a 4-yr study in three Mediterranean forest sites, which enabled us to gain an insight into spatio-temporal patterns of seedling recruitment at the community level and, based on comparisons between the canopy and the seedling layers, to predict the extent to which the inter-specific differences in recruitment limitation affects species replacement and forest stand dynamics.

    13. Shrub facilitation increases plant diversity along an arid scrubland–temperate rain forest boundary in South America (pages 541–551)

      Maarten J. van Zonneveld, Julio R. Gutiérrez and Milena Holmgren

      Article first published online: 11 JAN 2012 | DOI: 10.1111/j.1654-1103.2011.01379.x

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      We studied the role of nurse facilitation on the recruitment of perennial plants along an arid scrubland-temperate rainforest boundary in South America. Nurse living shrubs increased seedling abundance and diversity. Despite their low cover, dead shrubs were particularly important for recruitment of young seedlings in the scrubland. Facilitative interactions were more important for seedling establishment of forest than scrubland species.

    14. Short-term changes caused by fire and mowing in Brazilian Campos grasslands with different long-term fire histories (pages 552–562)

      Alessandra Fidelis, Carolina C. Blanco, Sandra C. Müller, Valério D. Pillar and Jörg Pfadenhauer

      Article first published online: 18 NOV 2011 | DOI: 10.1111/j.1654-1103.2011.01364.x

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      Fire plays an important role in maintaining Brazilian subtropical grasslands. In this study we analysed the fire effects on short-term changes of vegetation, comparing it to mowing. Fire stimulated vegetation regeneration better than mowing and it was more successful in opening spaces in vegetation for plant establishment. Thus, fire should be considered as a viable management tool for these grasslands.

    15. Effects of fire, grazing and topographic variation on vegetation structure in tallgrass prairie (pages 563–575)

      Scott L. Collins and Laura B. Calabrese

      Article first published online: 22 NOV 2011 | DOI: 10.1111/j.1654-1103.2011.01369.x

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      Fire and grazing interact to affect native tallgrass prairie. We analyzed vegetation structure in grassland sites following 20 years of burning treatments and 13 years of bison grazing across topographic gradients. Fire, grazing and soil type affected plant community composition, but no significant interactions occurred among these drivers. Thus, each landscape component contributes uniquely to landscape scale diversity and dynamics.

  2. Forum Articles

    1. Top of page
    2. Original Articles
    3. Forum Articles
    1. You have free access to this content
      Multiple successional pathways and precocity in forest development: can some forests be born complex? (pages 576–584)

      Daniel C. Donato, John L. Campbell and Jerry F. Franklin

      Article first published online: 11 NOV 2011 | DOI: 10.1111/j.1654-1103.2011.01362.x

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      We describe a forest successional pathway in which protracted or sparse tree establishment after disturbance precludes overstory canopy closure or a traditionally defined self-thinning phase. Although historically viewed as an impediment to stand development, we suggest this process may give rise to early-seral forests with certain structural complexities that are typically associated only with old forests.

    2. You have free access to this content
      Low-nutrient soils, pollination and plant diversity (pages 585–589)

      Steve J. Sinclair

      Article first published online: 7 DEC 2011 | DOI: 10.1111/j.1654-1103.2011.01371.x

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      ‘This paper offers a new mechanism responsible for the exceptional species-richness of some shrublands growing on low-nutrient soils. It argues that plants can assimilate carbon in excess under nutrient-limitation, making carbon-based pollination rewards relatively cheap. This allows a larger and more-specialised pollinator fauna to be supported, and in turn encourages speciation in animal-pollinated plants.’

    3. You have free access to this content
      Towards a more transparent use of the potential natural vegetation concept – an answer to Chiarucci et al. (pages 590–595)

      Imelda Somodi, Zsolt Molnár and Jörg Ewald

      Article first published online: 13 JAN 2012 | DOI: 10.1111/j.1654-1103.2011.01378.x

      We respond to recent criticism, argue for the usefulness of the Potential Natural Vegetation (PNV) concept and promote transparent decisions in assessing PNV. After eliminating unfounded expectations we specify the remaining challenges and advocate a probabilistic framework, in which PNV represents a set of vegetation types corresponding to natural site conditions at a location with different probability levels.

    4. You have free access to this content
      Potential natural vegetation: reburying or reboring? (pages 596–604)

      Javier Loidi and Federico Fernández-González

      Article first published online: 1 FEB 2012 | DOI: 10.1111/j.1654-1103.2012.01387.x

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      Potential Natural Vegetation (PNV) concept is debated and authors recognize its limitations regarding the interpretation of vegetation dynamics but argue for the strength of the approach for summarizing knowledge about a territory through the integrated analysis of its current natural and seminatural vegetation patterns, thus providing guidelines for good practices in nature conservation and prospects for hypothesis generation.

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