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There have been five major extinction events throughout geological history, resulting in the elimination of biodiversity, followed by a rebound of species that adapted to the new conditions. In the current geological epoch, the Holocene, there is a sixth extinction event in progress. This mass extinction has been attributed to human activities and is thus provisionally called the Anthropocene. In 2019 the human population reached 7.7 billion people and is projected to comprise 10 billion by...
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Updated: May 23, 2026

JenaTron - An Experimental Approach to Study the Effects of Plant History and Soil History on Grassland Ecosystem Functioning
09:23

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Published on: March 21, 2025

Restoring structural complexity in temperate forests increases bat and bird diversity.

Clara Wild1, Anne Chao2, Po-Yen Chuang2

  • 1Conservation Biology and Forest Ecology, Biocenter, Julius-Maximilians-Universität Würzburg, Glashüttenstraße 5, Rauhenebrach 96181, Germany.

Current Biology : CB
|May 21, 2026
PubMed
Summary
This summary is machine-generated.

Forest restoration increasing structural complexity boosts bat and bird diversity across landscapes. Bats respond to landscape-level patch differences, while birds benefit from local habitat improvements.

Keywords:
BETA-FORalpha beta gamma diversitybiodiversity restorationforest managementhabitat heterogeneitylandscape ecologylarge-scale experimentspatial scaletemperate forests

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Area of Science:

  • Ecology
  • Conservation Biology
  • Forestry

Background:

  • Forest management practices, such as intensive wood production, have led to simplified forest structures and reduced biodiversity.
  • Understanding how biodiversity responds to environmental changes is crucial for effective conservation and restoration efforts.

Purpose of the Study:

  • To investigate how restoring structural complexity in temperate forests influences bat and bird diversity across various spatial scales.
  • To compare the effects of structural heterogeneity versus homogeneity on taxonomic, functional, and phylogenetic diversity.

Main Methods:

  • A large-scale, replicated landscape experiment was conducted in 11 German temperate beech forest sites.
  • Structural complexity was manipulated by creating canopy gaps and adding deadwood.
  • Bat and bird diversity were assessed using autonomous acoustic monitoring and automatic species identification, quantifying alpha, beta, and gamma diversity.

Main Results:

  • Enhancing structural complexity increased overall landscape (gamma) diversity for both bats and birds.
  • Bat diversity gains were driven by increased dissimilarity among forest patches (beta diversity), while bird diversity gains resulted from increased local diversity within patches (alpha diversity).
  • Bats showed primarily taxonomic diversity increases, whereas birds exhibited greater gains in functional diversity, indicating trait-based responses.

Conclusions:

  • Forest restoration strategies must be tailored to specific taxa and spatial scales to effectively enhance biodiversity.
  • Bats and birds respond differently to forest structural complexity, reflecting variations in their spatial ecology and habitat requirements.
  • Restoring structural complexity can be a viable approach for increasing forest biodiversity, but the mechanisms driving these increases vary between species groups.