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Fine-scale characteristics of the boundaries between annual patches and perennial patches in a meadow steppe

  • Yonghong Cao
  • Deli WangEmail author
  • Mikko Heino
  • Xincheng Li
  • Hui Zhu
  • Jushan Liu
  • Xuehui Zou
Research Article
  • 51 Downloads

Abstract

Context

Boundaries may have crucial influences on landscape patterns, processes, and dynamics. However, there is little understanding of mechanisms that govern changes in the location and composition of boundaries. At smaller scales, investigation of detailed soil and vegetation characteristics can clarify the linkages between soil properties and vegetation patterns.

Objectives

The aims were to examine the relationship between vegetation patterns and soil properties, and to explore mechanisms that govern changes in the location and composition of boundaries.

Methods

In a 50-ha grassland fenced for more than 10 years, where a recovery process had been initiated and annual grasses dominated in most saline–alkaline areas, we quantitatively characterized the spatial gradients across the visually identified physiognomic boundary between annual patches and perennial patches at a fine spatial scale.

Results

Fine-scale vegetation and soil boundaries were well-defined and statistically characterized by a high rate of change compared to immediately adjacent areas. Plant characteristics were markedly influenced by soil properties. The alteration of salinity and alkalinity were the most important factors explaining the plant patterns across patch boundaries. Successional processes of colonization were involved in perennial encroachment in the annual patches.

Conclusions

Underlying soil properties primarily determine the plant patterns of the boundary; plant succession caused by interspecific competition is superimposed on the plant–soil feedback loop maintaining soil nutrient conditions. These processes alter the characteristics and locations of patch boundaries in response to changing disturbance regimes. Our findings offer insight into how boundaries may respond to changes in environmental conditions and drive landscape-level dynamics.

Keywords

Boundary characteristic Patch Meadow steppe Saline–alkaline grassland Fine-scale study Plant–soil feedback 

Notes

Acknowledgements

We thank László Körmöczi for helpful comments on an earlier draft of this paper. This project was supported by National Key Research and Development Program of China (2016YFC0500602), National Natural Science Foundation of China (No. 31770520), the Program for Introducing Talents to Universities (B16011), and the Program for Innovative Research Team in University (IRT-16R11).

Supplementary material

10980_2019_805_MOESM1_ESM.xlsx (27 kb)
Supplementary material 1 (XLSX 26 kb)
10980_2019_805_MOESM2_ESM.docx (460 kb)
Supplementary material 2 (DOCX 459 kb)

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Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration / Key Laboratory of Vegetation Ecology, Ministry of Education, School of EnvironmentNortheast Normal UniversityChangchunChina
  2. 2.Department of Biological SciencesUniversity of BergenBergenNorway

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