Can we predict which species win when new habitat becomes available?

Area of Science:

• Ecology
• Environmental Science
• Botany

Background:

• Land cover change, driven by human activities like deforestation, significantly alters habitats.
• Deforestation converts closed forests into open non-forest areas, creating new ecological niches.
• Understanding species' ability to colonize these altered habitats is crucial for predicting biodiversity responses.

Purpose of the Study:

• To investigate the factors influencing the colonization of anthropogenically opened habitats by open-habitat plant species.
• To determine the relative importance of geographic features, climatic niche characteristics, and species traits in species' success in newly opened habitats.
• To understand how land cover change affects the distribution patterns of open-habitat plants.

Main Methods:

• Utilized occurrence records for 18 herbaceous Acaena species (Rosaceae).
• Correlated species prevalence in recently opened habitats with geographic features, climatic niche variables, and dispersal-related traits.
• Compared factors controlling species distribution in primary (natural) versus secondary (anthropogenic) open habitats.

Main Results:

• Secondary open habitats are generally warmer and wetter than primary open habitats.
• Significant variation exists in species' prevalence across secondary open habitats, indicating differential colonization success.
• Geographic features and climatic niche characteristics showed stronger correlations with species prevalence than functional traits.

Conclusions:

• Geographic and environmental factors are more critical than functional traits for the expansion of small herbaceous species into secondary open habitats.
• Land cover change may shift the primary drivers of open-habitat plant distribution from forest competition to environmental constraints.
• Species' ability to exploit anthropogenically altered landscapes is strongly influenced by habitat characteristics and climate.