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Related Concept Videos

Habitat Fragmentation02:31

Habitat Fragmentation

Habitat fragmentation describes the division of a more extensive, continuous habitat into smaller, discontinuous areas. Human activities such as land conversion, as well as slower geological processes leading to changes in the physical environment, are the two leading causes of habitat fragmentation. The fragmentation process typically follows the same steps: perforation, dissection, fragmentation, shrinkage, and attrition.
Softwoods and Hardwoods01:28

Softwoods and Hardwoods

Softwoods and hardwoods, derived from different types of trees, are distinguished by their leaf structures and cellular compositions, each serving unique purposes in construction and manufacturing. Softwoods come from cone-bearing trees with needle-like leaves and are predominantly composed of longitudinal cells called tracheids and a smaller proportion of radial cells known as rays. Due to their cellular structure, softwoods are commonly used in construction for structural frames, sheathing,...
Introduction to Wood01:19

Introduction to Wood

Wood, derived from trees, is a versatile and widely used construction material. Trees feature a trunk surrounded by a protective layer of dead bark. Beneath this outer layer lies the living bark, followed by the cambium, and then the sapwood which transitions into heartwood as it matures. At the center of the trunk is the pith. The age of a tree can be discerned by examining its growth rings, which are concentric bands visible in the trunk's cross-section.
The structural integrity of the wood...

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Related Experiment Video

Updated: May 31, 2026

Development of an Individual-Tree Basal Area Increment Model using a Linear Mixed-Effects Approach
04:35

Development of an Individual-Tree Basal Area Increment Model using a Linear Mixed-Effects Approach

Published on: July 3, 2020

The changes in China's forests: an analysis using the Forest Identity.

Lei Shi1, Shuqing Zhao, Zhiyao Tang

  • 1College of Urban and Environmental Sciences, and Key Laboratory for Earth Surface Processes of the Ministry of Education, Peking University, Beijing, China.

Plos One
|June 23, 2011
PubMed
Summary
This summary is machine-generated.

China

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Assessing the Particulate Matter Removal Abilities of Tree Leaves
05:07

Assessing the Particulate Matter Removal Abilities of Tree Leaves

Published on: October 7, 2018

Related Experiment Videos

Last Updated: May 31, 2026

Development of an Individual-Tree Basal Area Increment Model using a Linear Mixed-Effects Approach
04:35

Development of an Individual-Tree Basal Area Increment Model using a Linear Mixed-Effects Approach

Published on: July 3, 2020

Assessing the Particulate Matter Removal Abilities of Tree Leaves
05:07

Assessing the Particulate Matter Removal Abilities of Tree Leaves

Published on: October 7, 2018

Area of Science:

  • Forestry
  • Ecology
  • Climate Change Science

Background:

  • Forest carbon stocks significantly influence regional carbon budgets.
  • China has observed substantial increases in forest area and density over recent decades.
  • Comprehensive analyses of these changes are limited.

Purpose of the Study:

  • To evaluate the evolving status of China's forests over three decades using the Forest Identity concept.
  • To quantify changes in forest area, density, and carbon sequestration.
  • To identify key drivers behind these observed forest changes.

Main Methods:

  • Utilized national forest inventory data spanning five periods from 1977 to 2003.
  • Applied the Forest Identity concept for comprehensive analysis.
  • Calculated annual rates of change for forest area, growing stock density, and carbon sequestration.

Main Results:

  • Forest area and growing stock density increased by 0.51% and 0.44% annually, respectively.
  • Forest biomass conversion ratio to growing stock declined by 0.10% annually.
  • Achieved a net annual increase of 0.85% in forest carbon sequestration, totaling 43.8 Tg of biomass carbon uptake per year.

Conclusions:

  • China's forests have shown significant growth in area and density over the past three decades.
  • National reforestation programs, improved forest growth, and economic development are key contributors to increased carbon sequestration.
  • These findings highlight the effectiveness of conservation efforts and policy in enhancing forest carbon sinks.