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Modelling plant population size and extinction thresholds from habitat loss and habitat fragmentation: Effects of neighbouring competition and dispersal strategy

Author

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  • Liao, Jinbao
  • Li, Zhenqing
  • Hiebeler, David E.
  • El-Bana, Magdy
  • Deckmyn, Gaby
  • Nijs, Ivan

Abstract

Habitat destruction is a key determinant of species extinction. Its principle components, habitat fragmentation and habitat loss, affect species persistence in landscapes, but few models have investigated how dispersal type and intraspecific competition (crowding effect) modulate this. If dispersal type or crowding changes extinction thresholds, then fragmentation and habitat loss might act differently on different species. Here we generate fragmented landscapes by varying the orthogonal neighbouring correlation between suitable and unsuitable habitat. We show that local dispersers undergo a strong negative impact of habitat fragmentation (lower occupancy of suitable sites), but only under severe habitat loss. In contrast, global dispersal eliminated fragmentation effects through random establishment. Both fragmentation and crowding effects enhanced the extinction risk of species that spread their seeds at close range, while long-range dispersers were not influenced. However, fragmentation improved the persistence of global dispersers that are highly sensitive to crowding, probably through reduced intraspecific competition. With respect to species conservation, our results suggest that random habitat destruction is a more serious threat to species persistence than clustered habitat destruction. Moreover, as species responses to habitat fragmentation depend on dispersal type and sensitivity to crowding, fragmented landscapes with different properties may accommodate different species.

Suggested Citation

  • Liao, Jinbao & Li, Zhenqing & Hiebeler, David E. & El-Bana, Magdy & Deckmyn, Gaby & Nijs, Ivan, 2013. "Modelling plant population size and extinction thresholds from habitat loss and habitat fragmentation: Effects of neighbouring competition and dispersal strategy," Ecological Modelling, Elsevier, vol. 268(C), pages 9-17.
  • Handle: RePEc:eee:ecomod:v:268:y:2013:i:c:p:9-17
    DOI: 10.1016/j.ecolmodel.2013.07.021
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    References listed on IDEAS

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    1. Liao, Jinbao & Li, Zhenqing & Quets, Jan J. & Nijs, Ivan, 2013. "Effects of space partitioning in a plant species diversity model," Ecological Modelling, Elsevier, vol. 251(C), pages 271-278.
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    Citations

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    Cited by:

    1. Shen, Yang & Zeng, Chenghui & Nijs, Ivan & Liao, Jinbao, 2019. "Species persistence in spatially regular networks," Ecological Modelling, Elsevier, vol. 406(C), pages 1-6.
    2. Shen, Yang & Xu, Zhichao & Nijs, Ivan & Liao, Jinbao, 2018. "Spatial arrangement of size-different patches determines population dynamics in linear riverine systems," Ecological Modelling, Elsevier, vol. 385(C), pages 220-225.
    3. Su, Min & Chen, Ge & Yang, Yuanqi, 2019. "Dynamics of host-parasite interactions with horizontal and vertical transmissions in spatially heterogeneous environment," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 517(C), pages 452-458.
    4. Xu, Zhichao & Shen, Yang & Liao, Jinbao, 2018. "Patch dynamics of various plant-animal interactions in fragmented landscapes," Ecological Modelling, Elsevier, vol. 368(C), pages 27-32.
    5. Ying, Zhixia & Ge, Gang & Liu, Yongjie, 2018. "The effects of clonal integration on the responses of plant species to habitat loss and habitat fragmentation," Ecological Modelling, Elsevier, vol. 384(C), pages 290-295.
    6. Liao, Limei & Shen, Yang & Liao, Jinbao, 2020. "Robustness of dispersal network structure to patch loss," Ecological Modelling, Elsevier, vol. 424(C).
    7. Liu, Haoqi & Li, Weide & Lv, Guanghui, 2019. "How nonrandom habitat loss affects nature reserve planning strategies," Ecological Modelling, Elsevier, vol. 397(C), pages 39-46.
    8. Drielsma, Michael & Love, Jamie, 2021. "An equitable method for evaluating habitat amount and potential occupancy," Ecological Modelling, Elsevier, vol. 440(C).
    9. Gatmiry, Zohreh S. & Hafezalkotob, Ashkan & Khakzar bafruei, Morteza & Soltani, Roya, 2021. "Food web conservation vs. strategic threats: A security game approach," Ecological Modelling, Elsevier, vol. 442(C).
    10. Liu, Sen & Han, Boyang & Li, Weide, 2022. "Self-healing time of population under dynamic disturbance," Ecological Modelling, Elsevier, vol. 470(C).
    11. Clinton Stipek & Rolando Santos & Elizabeth Babcock & Diego Lirman, 2020. "Modelling the resilience of seagrass communities exposed to pulsed freshwater discharges: A seascape approach," PLOS ONE, Public Library of Science, vol. 15(2), pages 1-15, February.
    12. Velazquez-Castro, Jorge & Eichhorn, Markus P., 2017. "Relative ranges of mating and dispersal modulate Allee thresholds in sessile species," Ecological Modelling, Elsevier, vol. 359(C), pages 269-275.

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