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Chronic Unpredictable Mild Stress in Rats based on the Mongolian medicine
05:56

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Published on: October 27, 2023

Management applicability of the intermediate disturbance hypothesis across Mongolian rangeland ecosystems.

Takehiro Sasaki1, Satoru Okubo, Tomoo Okayasu

  • 1Department of Ecosystem Studies, Graduate School of Agricultural and Life Sciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan. aa67123@mail.ecc.u-tokyo.ac.jp

Ecological Applications : a Publication of the Ecological Society of America
|March 28, 2009
PubMed
Summary

The intermediate disturbance hypothesis (IDH) may not apply universally in Mongolian rangelands. Landscape conditions influence diversity-disturbance relationships, suggesting intermediate grazing and ecological thresholds support sustainable rangeland management.

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Published on: October 11, 2016

Area of Science:

  • Ecology
  • Rangeland Management
  • Conservation Biology

Background:

  • The intermediate disturbance hypothesis (IDH) predicts a peaked diversity-disturbance relationship, but its universality and management applicability are debated.
  • Ecological site conditions and landscape factors may influence the validity of the IDH.
  • Sustainable rangeland management requires understanding how disturbance, like grazing, impacts biodiversity.

Purpose of the Study:

  • To test the generality and management applicability of the IDH in Mongolian rangelands.
  • To investigate if landscape condition modifies the diversity-disturbance relationship.
  • To assess the role of intermediate grazing scales in sustainable rangeland management.

Main Methods:

  • Quantified landscape conditions using ordination techniques, classifying sites as benign or harsh.
  • Applied a grazing gradient approach to examine diversity-disturbance relationships.
  • Evaluated intermediate grazing levels against ecological thresholds for land management.

Main Results:

  • Diversity-disturbance relationships aligned with the IDH in benign conditions, with peak diversity at intermediate grazing.
  • The IDH was not consistently supported in harsh environmental conditions.
  • Intermediate grazing levels generally occurred below critical ecological thresholds, indicating limited disturbance concerns for management.

Conclusions:

  • Landscape condition is a key factor causing variability in diversity-disturbance relationships.
  • Ecological thresholds are compatible with maintaining species diversity and useful for rangeland management.
  • Intermediate grazing scales and ecological thresholds offer mutually supportive strategies for sustainable Mongolian rangeland management.