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Repeated grazing of a salt marsh grass by moulting greylag geese Anser anser – does sequential harvesting optimise biomass or protein gain? by Anthony D. Fox; Johnny Kahlert is a Environmental Science article available to read on EtoBox.

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The effects of simulated goose grazing on common saltmarsh‐grass __Puccinellia maritima__ plants were tested on a Danish salt marsh during the flightless moulting period of greylag geese __Anser anser__ (3–21 June 1998). Plants in an area exclosed from the influence of grazing and the nutrient effects of goose faeces were subject to removal of youngest lamina at 3‐, 6‐, 9‐ and 18‐day intervals during this period. Average biomass and protein accumulation between harvests was highest at defoliation intervals of 9 days or more. Field observations from two separate study areas demonstrated geese returned to regraze the __Puccinellia__ sward after 6–8 days and oesophageal contents from feeding geese showed selection for lamina lengths consistent with the results of clipping every 6 days. Geese therefore regrazed __Puccinellia__ patches at shorter intervals than expected were they to maximise their intake of biomass or protein at each visit. However, total cumulative lamina elongation, equivalent to the long term gain during the entire moult period, showed no significant difference between the three most intensive defoliation treatments, which were significantly greater than those of pla

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Author

Anthony D. Fox; Johnny Kahlert

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley; JSTOR (ISSN 0908-8857)

Published

2003

Language

EN

Field

Environmental Science (Physical Sciences)