HORT 2134 Lecture Notes - Lecture 13: Scarlet Tanager, Habitat Fragmentation
20 Nov 2016
School
Department
Course
Professor
Document Summary
Decreases in open space cause habitat loss and degradation. Effects: changes in species diversity and the genetic isolation of animals with low mobility b. 1990- 274 metropolitan areas in the united states, covering 20% of the country"s land area. Containing almost 200 million people - 80% of the country"s population ii. Grew 3-5% in the past decade, but develop land area grew by 50% The spread of invasive exotic species can be correlated with the spread of humans. In 1974, 20% of us households fed wild birds, spending almost two billion dollars in current value d. The following factors contributed to the increasing interest in suburban wildlife: Most development and loss of open space occurs as suburban development, along the urban-rural interface. Numbers and diversity of species are greater in suburban that urban areas. Human-wildlife interactions, both positive and negative, are highest in suburban areas.
