Abstract
TURNER, M. G. (Env. Sci. Div., Oak Ridge Natl. Lab., Oak Ridge, TN 37831). Multiple disturbances in a Spartina alterniflora salt marsh: Are they additive? Bull. Torrey Bot. Club 115: 196-202. 1988.-The role of ecological disturbance has received much attention, but most studies consider single rather than multiple types of disturbance. An experiment was conducted to determine whether combinations of disturbances (clipping, trampling and fire) elicit additive responses from Spartina alterniflora Loisel. equivalent to the sum of responses to the individual disturbances. When combined, clipping and trampling had additive effects on aboveground standing stocks of Spartina, but combinations of fire with clipping or trampling had less effect than predicted. Effects on net aboveground primary production (NAPP) differed from effects on standing stocks. Clipping combined with trampling or burning reduced NAPP more than predicted, whereas the effect of burning and trampling on NAPP was additive. Thus, nonadditive responses to multiple disturbances can be identified and quantified, but the nature of the effect may differ with the parameter studied. Understanding such interactions is necessary to predict ecosystem dynamics in response to disturbances.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
