Responses of boreal epiphytic bryophytes to different levels of partial canopy harvest

  • Published source details Caners R.T., Macdonald S.E. & Belland R.J. (2010) Responses of boreal epiphytic bryophytes to different levels of partial canopy harvest. Botany, 88, 315-328.


This study is summarised as evidence for the following.

Action Category

Thin trees within forests: effects on non-vascular plants

Action Link
Forest Conservation
  1. Thin trees within forests: effects on non-vascular plants

    A replicated, randomized, controlled study in 1998-2004 in boreal forest in Alberta, Canada (Caners, Macdonald & Belland 2010) found that thinning treatments decreased species richness and abundance of non-vascular plants that grow on other plants. Numbers of species was the lowest in 10% and 50% canopy retention sites (5/tree), intermediate and similar to the other treatments in the 75% canopy retention sites (6) and highest in unharvested sites (8). The abundance was lower in 10, 50 and 75% canopy retention sites (present in 19, 21 and 25% of sampling points respectively) than in unharvested sites (50% of sampling points). In 2004, six to eight trees were sampled in each of four harvesting treatments (10 ha): 10%, 50% and 75% canopy retention and unharvested, randomly applied in 1998-1999 in each of three sites (a total of 80 trees).


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