Categorize the following density-independent factors by their cause and effect. The four categories are natural/catastrophic, natural/gradual, human-made/catastrophic, and human-made/gradual.  A volcanic explosion results in lava flow over five square miles where a population of rare orchids lives. A vernal pool driesup a few weeks earlier than normal, impacting a population of spotted salamanders that used the pool to breed earlier in the season. A toxic chemical spill directly into a lake kills eggs, small fry, and all females in a dense population of bass. An increase in demand by humans increases harvesting of shrimp by people in the fishing industry.

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Categorize the following density-independent factors by their cause and effect. The four categories are natural/catastrophic, natural/gradual, human-made/catastrophic, and human-made/gradual. 

  1. A volcanic explosion results in lava flow over five square miles where a population of rare orchids lives.
  2. A vernal pool driesup a few weeks earlier than normal, impacting a population of spotted salamanders that used the pool to breed earlier in the season.
  3. A toxic chemical spill directly into a lake kills eggs, small fry, and all females in a dense population of bass.
  4. An increase in demand by humans increases harvesting of shrimp by people in the fishing industry.
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