Birds of Indian Subcontinent

An Assessment of American Coot Herbivory of Hydrilla

Publication Type:Journal Article
Year of Publication:1989
Authors:Esler, D
Journal:The Journal of Wildlife Management
Date Published:1989
ISBN Number:0022541X
Keywords:Fulica, Fulica americana, Fulica atra, Rallidae
Abstract:I measured impacts of American coots (Fulica americana) on hydrilla (Hydrilla verticillata) depth and biomass and assessed the role of herbivory on the seasonal decline of hydrilla. Differences in hydrilla depth between exclosures and open frames increased progressively in association with increased herbivory by coots. Biomass differed between treatments for wet (P = 0.0017) and oven-dried (P = 0.0004) samples. Hydrilla appears able to rebound well from yearly declines caused by a combination of herbivory and climate, and provides an abundant, renewable, and highly-used food resource for American coots and other wetland birds.
Short Title:The Journal of Wildlife Management
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith