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Population Ecology

, Volume 58, Issue 1, pp 165–178 | Cite as

Land use heterogeneity causes variation in demographic viability of a bioindicator of species-richness in protected fen grasslands

  • Tristan LemkeEmail author
  • Roberto Salguero-Gómez
Original article

Abstract

Land use change is one of the main drivers of species extinction. In Europe, grasslands are under active conflict between conservation efforts and increasing agricultural pressures. Here, we examine the demographic effects of differential land use on the herbaceous perennial Trollius europaeus L. (Ranunculaceae), a bioindicator of species-richness and ecosystem services in wet grasslands of Central Europe. Demographic data were collected in 2006–2009 from nine populations in seven protected sites of northeastern Germany representing four land use types. We constructed stage-based matrix population models to explore the effects of various land management on demographic viability of focal populations. We show that most studied populations are declining (λ < 1), although the estimates of local extinction vary between ≤15 years for grazed and woodland populations, and 20–99 years for mown and abandoned populations. The joint information from our elasticity analyses and life table response experiments revealed that reproduction, growth of small vegetative individuals and survival of reproductive stages are most important for population viability. Our study shows that the current land uses in protected areas where T. europaeus is found is incompatible with its long-term viability. We suggest that, when compatible with in situ practices, grasslands containing this species be mown after maturity in order to enhance seedling recruitment and to reduce competition for juveniles. Prolonged extinction times in abandoned populations offer a buffer to develop conservation schemes there. An improvement of conservation measures is urgently needed to maintain the populations of this important bioindicator and its associated community of moist species-rich fen grasslands.

Keywords

Conservation Matrix population model Perturbation analysis Population growth rate (λPopulation viability Trollius europaeus 

Notes

Acknowledgments

T. L. thanks S. Porembski and the Department of Botany at the University of Rostock as well as M. Schnittler (University of Greifswald) for logistic support, I. Huismann, K. Nickschick and D. Riebold for help during fieldwork, and R. Kinzelbach (University of Rostock) for the determination of the bug larvae. R. S.-G. acknowledges financial support from the Max Planck Institute for Demographic Research and the Australian Research Council DECRA fellowship DE140100505.

Supplementary material

10144_2015_519_MOESM1_ESM.pdf (1.1 mb)
Supplementary material 1 (PDF 1108 kb)
10144_2015_519_MOESM2_ESM.xls (258 kb)
Supplementary material 2 (XLS 258 kb)

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Copyright information

© The Society of Population Ecology and Springer Japan 2015

Authors and Affiliations

  1. 1.Department of Botany, Institute of Biological SciencesUniversity of RostockRostockGermany
  2. 2.Max Planck Institute for Demographic ResearchRostockGermany
  3. 3.School of Biological Sciences, Centre for Biodiversity and Conservation ScienceThe University of QueenslandSt LuciaAustralia
  4. 4.School of Natural Sciences, Zoology DepartmentTrinity College DublinDublin 2Ireland

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