Amphibians Near Polish Motorways

189 water bodies surveyed along motorways A1 and S52 — tracking habitat features and the presence of 7 amphibian species to guide road-corridor conservation.

Key finding
1.6×
more species on average at sites > 5 km from the motorway than within 500 m (4.09 vs 2.48 species per site).
189
Water bodies surveyed
7
Amphibian species tracked
80
Sites on A1
109
Sites on S52
3.11
Avg species per site
103
Sites with 3+ species

How often each species appeared

Sites (out of 189) where each species was recorded.

A1 vs S52 — presence rate per species

% of sites on each motorway where each species was found.

A1 (80 sites) S52 (109 sites)

Does distance from the motorway matter?

Bars = number of sites at each distance band. Line = average species richness at that distance.

Number of sites Avg species richness

Species richness distribution

How many sites host exactly 0, 1, 2 … 7 species.

Vegetation rating vs species diversity

Sites grouped by survey vegetation rating (VR 0–4). Line = average species richness per group.

Number of sites Avg species richness