Różnorodność biologiczna awifauny Doliny Baryczy – projekt Ptasia Dolina
iNat observations, eBird checklist entries and Ornitho sightings are source records. No cross-platform deduplication. Exact individual counts exclude estimates and presence-only reports.
What counts as a species?
Species richness uses eBird/Clements 2025. Unambiguous subspecies are grouped with their species. Higher taxa, ambiguous groups, hybrids, domestic forms and unresolved names do not increase richness. Source records are retained.
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Annual charts describe reports and recorded species, not population trends. Effort, coverage and sources vary. Combined data are not deduplicated across platforms; publication comparisons require controlling these differences.
Breeding subset: iNat May–August (season proxy), eBird breeding codes excluding F/O, Ornitho atlas codes. Definitions differ; timing alone does not prove breeding. Summary tiles cover all data.
Scientific biodiversity indicators (Hill numbers)
The large numbers show diversity in the current calendar year — every new project observation updates them. The charts below show how these indicators changed over time.
Charts: yearly history; dashed line — mean spring temperature, bars — precipitation.
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Species richness (⁰D)
Recognized species with at least one report in the selected year.
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Shannon diversity (¹D)
Effective species number: exp(−Σ pᵢ ln pᵢ). Here pᵢ is the share of species reports.
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Simpson diversity (²D)
Effective species number: 1/Σ pᵢ². Gives greater weight to frequently reported species.
Yearly charts show raw reporting history, not a biological trend or causal climate link. Observer effort and platform adoption are uncontrolled.