BIOB50H3 Study Guide - Midterm Guide: Starch, Bioluminescence, Logistic Function
12 Sep 2016
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Document Summary
Deformity and decline in amphibian populations: a case study. Some frogs had missing or extra limbs ( severely deformed) In some localities more than 90% of the individuals were deformed. Also found in europe, asia, and australia. The decline appeared o have started recently across wide regions of the world. Some of the populations in decline were located in protected or pristine regions - far from the effects of human activities. Two species make live in the same area but have little influence on each other. All organisms are connected to features of their environment - food, space, and other resources. Early observations suggest that parasites cause amphibian deformities. Scientists found that as the number of parasites increased, fewer of the tadpoles survived to metamorphosis and more of the survivors had deformities. A field experiment suggests that multiple factors influence frog deformities - such as pesticides that contaminated ponds in which the deformed frogs were found.
