Results of a study on local adaptation of color patterns in snakes show the frequency of different color patterns of water snakes of Lake Erie (Nerodia sipedon) found on the mainland shores and scattered islands within the lake. Type A snakes are unbanded, Type D is strongly banded, and Types B and C are intermediates. Given that natural selection favors unbanded snakes on the islands, how can you account for the presence/perpetuation of banded snakes on the islands? 100 Percentage 80 N=63 40 20 ABCD Ontario mainland N=64 ABCD Peninsular mainland N=16 A B C D Kelleys Island N= 214 N=188 ABCD ABCD Bass complex Middle and Pelee islands islands O Natural selection favors unbanded snakes on the mainland. O Snakes on the islands represent a case of the so-called founder effect. Natural selection favors banded snakes on the mainland, which occasionally migrate to the islands. Mutation rates converting unbanded alleles to a banded form operate at high frequencies on islands.
Biogeography
The study of plants, animals, and other living things in terms of their geographic distribution is referred to as biogeography. Biogeography is usually examined in coexistence with ecological and historical variables that have affected organisms' spatial distribution across time. It is not only based on the habitation patterns; it is also about the reasons that cause differences in distribution. Biogeographic studies divide the Earth's surface into diverse flora and fauna compositions, notably the continents and islands. Biogeography is a field of science, but physical geographers have made vital commitments, especially in flora. Biogeography is a multidisciplinary field of study that combines concepts and data from ecology, evolutionary biology, taxonomy, geology, physical geography, paleontology, and climatology.
Types of Climate
The weather pattern in a long-term process in a locality, region, or even over the entire globe is known as climate. Generally, it is decided by calculating an average of thirty years' weather in a region. In that sense, the weather and climate are different.
Biome
It is defined as a definite community of animals and plants residing together in a climate. Each (plants and animals) having a characteristic appearance and distributed over a wide geographical area defined largely by regional climatic conditions.
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