dis·cli·max
  (dĭs-klī′măks′)n. Ecology  A climax community that has been disturbed by various influences, especially by humans and domestic animals, such as a grassland community that has been altered to desert by overgrazing.
 American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
disclimax
 (dɪsˈklaɪmæks) n (Environmental Science) ecology a climax community resulting from the activities of man or domestic animals in climatic and other conditions that would otherwise support a different type of community
 Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
dis•cli•max
  (dɪsˈklaɪ mæks)  
 
 n.   a stable ecological community that has replaced the normal climax in a given area owing to ecological disturbance, esp. by human activity. 
 [1935–40]
 Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.