Oecologia

, Volume 184, Issue 1, pp 1–12

Trait assembly in grasslands depends on habitat history and spatial scale

  • Liina Saar
  • Francesco de Bello
  • Meelis Pärtel
  • Aveliina Helm
Highlighted Student Research

Abstract

During the past century, grasslands in Europe have undergone marked changes in land-use, leading to a decline in plant diversity both at local and regional scales, thus possibly also affecting the mechanisms of species sorting into local communities. We studied plant species assembly in grasslands with differing habitat history and hypothesised that trait divergence prevails in historical grasslands due to niche differentiation and trait convergence prevails in more dynamic grasslands due to competitive exclusion and dispersal limitation. We tested these hypotheses in 35 grassland complexes in Estonia, containing neighbouring grassland habitats with different land-use histories: continuously managed open historical grassland, currently overgrown former grassland and young developing grassland. We assessed species assembly patterns in each grassland type for finer scale—a 2 × 2 m plot scale from a local community pool and for broader scale—a local community from the habitat species pool for that grassland stage and observed changes in trait means at finer scale. We found that grasslands with long management history are assembled differently from former grasslands or young developing grasslands. In historical grasslands, divergence or random patterns prevailed at finer scale species assembly while in former or developing grasslands, mostly convergence patterns prevailed. With increasing scale convergence patterns become more prevalent in all grassland types. We conclude that land-use history is an important factor to consider when assessing grassland functional trait assembly, particularly at small scales. Understanding the mechanisms behind species assembly and their relationship with land-use history is vital for habitat conservation and restoration.

Keywords

Environmental filtering Functional diversity Land-use change Limiting similarity Species pool 

Supplementary material

442_2017_3812_MOESM1_ESM.docx (338 kb)
Supplementary material 1 (DOCX 338 kb)

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Copyright information

© Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Liina Saar
    • 1
  • Francesco de Bello
    • 2
    • 3
  • Meelis Pärtel
    • 1
  • Aveliina Helm
    • 1
  1. 1.Institute of Ecology and Earth SciencesUniversity of TartuTartuEstonia
  2. 2.Institute of BotanyCzech Academy of SciencesTřeboňCzech Republic
  3. 3.Department of BotanyUniversity of South BohemiaČeské BudějoviceCzech Republic

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