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Plant and Soil

, Volume 425, Issue 1–2, pp 231–240 | Cite as

Intraspecific aggregation and soil heterogeneity: competitive interactions of two clonal plants with contrasting spatial architecture

  • Wei Xue
  • Lin Huang
  • Fei-Hai Yu
  • T. Martijn Bezemer
Regular Article

Abstract

Background and aims

Intraspecific aggregation of plant individuals can promote species coexistence by delaying competitive exclusions. However, such impacts may differ among species with contrasting spatial architecture and rely on the spatial distribution of resources.

Methods

We grew a phalanx clonal plant Carex neurocarpa (with aggregated ramets) and a guerilla one Bolboschoenus planiculmis (with diffused ramets) in monocultures or in 1:1 mixtures with an even or a clustered distribution pattern of the two species in homogeneous or heterogeneous soils.

Results

After 16 months, shoot biomass and ramet number were greater in mixtures than in monocultures in C. neurocarpa, but smaller in B. planiculmis. However, the growth of neither C. neurocarpa nor B. planiculmis differed between even and clustered mixtures. Soil nutrient heterogeneity did not significantly affect the growth of either species, but increased relative yield of B. planiculmis and decreased that of C. neurocarpa.

Conclusions

The relative importance of intra- vs. interspecific competition depends on the spatial architecture of plants, and soil nutrient heterogeneity slows down competitive exclusion by decreasing differences in competitive ability between plants. However, our results do not support the idea that intraspecific aggregation of individuals alters competitive interactions between species.

Keywords

Aggregation Clonal growth form Clonal population Competition Environmental heterogeneity Guerilla and phalanx 

Notes

Acknowledgements

We thank Rui Zhu, Bi-Cheng Dong, Pu Wang, Yong-Yang Wang, Jia-Yuan Li, Yong-Hong Gao and Xing-Xing Jiang for assistance with the experiment, and Jasper van Ruijven and two anonymous reviewers for valuable comments on the earlier version of the manuscript. This work was supported by NSFC (31570413 and 31761123001).

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and ConservationTaizhou UniversityTaizhouChina
  2. 2.Department of Terrestrial EcologyNetherlands Institute of Ecology (NIOO-KNAW)WageningenThe Netherlands
  3. 3.Institute of Biology, Section Plant Ecology and PhytochemistryLeiden UniversityLeidenThe Netherlands

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