Media type: E-Article Title: Positive and Negative Effects of Organisms as Physical Ecosystem Engineers Contributor: Jones, Clive G.; Lawton, John H.; Shachak, Moshe Published: Wiley, 1997 Published in: Ecology, 78 (1997) 7, Seite 1946 Language: Not determined DOI: 10.2307/2265935 ISSN: 0012-9658 Origination: Footnote: