The development of high-density aggregation spatial distribution patterns under high stress.

Area of Science:

• Ecology
• Plant Biology
• Environmental Science

Background:

• Plant populations in arid deserts often exhibit spatial aggregation patterns to cope with harsh conditions.
• Previous research primarily focused on static patterns, lacking long-term dynamic observations of aggregation development.

Purpose of the Study:

• To investigate the long-term development of high-density aggregation patterns in Haloxylon ammodendron populations under wind erosion stress.
• To identify key factors influencing population survival and spatial expansion in extreme desert environments.

Main Methods:

• Conducted five consecutive years of field surveys and spatial analyses in the Gurbantunggut Desert.
• Utilized Random Forest (RF) and Generalized Linear Mixed Models (GLMM) to analyze influencing factors.
• Examined population dynamics, spatial expansion, and microenvironment construction.

Main Results:

• Haloxylon ammodendron initially forms stable, high-density aggregations.
• Populations exhibit outward expansion consistent with prevailing northwest winds.
• Key factors influencing expansion include population density, wind speed, and neighbor effects.

Conclusions:

• Haloxylon ammodendron actively self-organizes to create microenvironments, mitigating wind erosion and expanding ecological niches.
• Biological interactions and environmental stress are crucial drivers of vegetation spatial self-organization in extreme environments.
• Provides a new perspective on plant adaptation mechanisms in arid deserts.