Bird Colonisation Patterns on Izu Islands, Japan (1970-2021)

261 grids across ten islands in the Izu archipelago were surveyed to quantify colonised bird species richness between 1970-1973 and 2017-2021. Daichi Iijima created this dataset to analyze the relative effects of 13 natural and anthropogenic factors on colonisation. Colonised species were recorded in 78 grids, with the species composition of the nearest historical island and the proportion of human settlement area identified as key drivers.

Use Cases

• Modeling colonised bird species richness based on 13 quantified natural and anthropogenic factors.
• Analyzing the relationship between historical community structures on source islands and colonisation patterns.
• Investigating the positive association between human settlement area proportion and colonised species richness.
• Comparing bird communities surveyed across two distinct time periods (1970-1973 and 2017-2021).
• Performing hierarchical partitioning and stepwise model selection on ecological data for island systems.

Strengths

• Includes data from 261 grids across ten islands, providing spatial granularity.
• Analyzes colonisation patterns across a 50-year time span (1970-1973 vs. 2017-2021).
• Quantifies the relative contributions of 13 distinct factors using statistical methods.
• Colonised species were recorded in 78 specific grids, offering concrete results.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• The dataset is 76.2 KB, indicating a limited scope and likely small number of observations.

Provenance

Source

figshare

Collection Method

Field surveys of bird communities on oceanic islands, followed by statistical analysis using generalized linear models and hierarchical partitioning.

Time Range

1970-1973 and 2017-2021

Freshness

Last updated 2026-04-09 03:13:37

Geography

Ten islands of the Izu Islands, central Japan