why were the islands in complete isolation?
Answers
Explanation:
Aim
Isolation is a key factor in island biology. It is usually defined as the distance to the geographically nearest mainland, but many other definitions exist. We explored how testing different isolation indices affects the inference of impacts of isolation on faunal characteristics. We focused on land bridge islands and compared the relationships of many spatial and temporal (i.e., through time) isolation indices with community‐, population‐ and individual‐level characteristics (species richness, population density and body size, respectively).
Location
Aegean Sea islands, Greece.
Time period
Current.
Taxon
Many animal taxa.
Methods
We estimated 21 isolation indices for 205 islands and recorded species richness data for 15 taxa (invertebrates and vertebrates). We obtained body size data for seven lizard species and population density data for three. We explored how well indices predict each characteristic, in each taxon, by conducting a series of ordinary least squares regressions (controlling for island area when needed) and a meta‐analysis.
Answer:
Extinction is lower on islands close to the mainland because of the likelihood of immigration. ... Larger islands have more space than smaller islands, so there are likely to be more resources available for species to use. The opposite is true for smaller islands. Therefore extinction rates are larger on small islands.
Explanation:
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