The effects of harvest-created gaps on plant species diversity, composition, and abundance in a Maine oak–pine forest

  • Published source details Schumann M.E., White A.S. & Witham J.W. (2003) The effects of harvest-created gaps on plant species diversity, composition, and abundance in a Maine oak–pine forest. Forest Ecology and Management, 176, 543-561.


This study is summarised as evidence for the following.

Action Category

Use group-selection harvesting

Action Link
Forest Conservation
  1. Use group-selection harvesting

    A replicated, controlled study in oak–pine Quercus–Pinus forest in Maine, USA (Schumann, White & Witham 2003) found no effect of group selection harvesting on species richness and diversity of understory vegetation. Numbers of species/1 m2 (group-selection: 18-34; uncut: 18-25) and diversity (Shannon's index group-selection: 1.7-2.2; uncut: 1.9-2.1) were similar between treatments. Data were collected in 1998 in 40 pairs of group-selection (36-3,393 m2 gaps harvested in 1987-1988) and uncut sites inside a 40 ha study area. Equal number (proportional to the gap size) of 1 m2 plots were monitored in each pair.


Output references
What Works 2021 cover

What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, mammals, forests, peatland and control of freshwater invasive species. More are in progress.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

Read the latest volume: Volume 21

Go to the CE Journal

Discover more on our blog

Our blog contains the latest news and updates from the Conservation Evidence team, the Conservation Evidence Journal, and our global partners in evidence-based conservation.

Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape ProgrammeRed List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Mauritian Wildlife Supporting Conservation Leaders
Sustainability Dashboard National Biodiversity Network Frog Life The international journey of Conservation - Oryx Cool Farm Alliance UNEP AWFA Bat Conservation InternationalPeople trust for endangered species Vincet Wildlife Trust