Population dynamics of a threatened orchid in production forests

Project overview

The intensification of forestry has negatively impacted many species dependent on old-growth forests in Sweden, including the threatened orchid Goodyera repens (Knärot in Swedish), classified as vulnerable (VU). This orchid is believed to be strongly associated with old, moss-rich continuous coniferous forests and serves as an indicator of forests of high conservation value with other threatened species. 

The project conducted by Victor aims to identify the habitat requirements of G. repens, analyze the population trends over the past 30 years, develop models to predict G. repens occurrence patterns, and validate G. repens as an indicator species for other threatened species.

Methodology:

Habitat analysis: Use data from the National Forest Inventory’s permanent sample plots to analyze detailed habitat requirements.

Population trends: Assess population trends and predict future development under different forestry management scenarios.

Habitat model: Develop and validate habitat models using GIS data that are available for the public.

Field validation: Conduct field visits to validate model predictions.

Assess the indicator value: Survey other indicators of old forests with high biodiversity in relation to the occurrence of G. repens (stands with and without the species).

Expected outcomes:

The project will provide practical tools for sustainable forestry management, guide decisions on logging, and contribute to achieving the environmental goal of “Living Forests.” It will also assess if G. repens effectively signals high nature value areas with other threatened species.