Spatial variation in tuber depletion by swans explained by differences in net intake rates
We tested whether the spatial variation in resource depletion by Tundra Swans (Cygnus columbianus) foraging on belowground tubers of sage pondweed (Potnmogeton pectinatus) was caused by differences in net energy intake rates. The variation in giving up densities within the confines of one lake was nearly eightfold, the giving-up density being positively related to water depth and, to a lesser extent, the silt content of the sediment. The swans' preference (measured as cumulative foraging pressure) was negatively related to these variables. We adjusted a model developed for diving birds to pred... Mehr ...
Verfasser: | |
---|---|
Dokumenttyp: | Artikel |
Erscheinungsdatum: | 2001 |
Reihe/Periodikum: | Nolet , B A , Langevoord , O , Bevan , R M , Engelaar , K R , Klaassen , M , Mulder , R J W & van Dijk , S 2001 , ' Spatial variation in tuber depletion by swans explained by differences in net intake rates ' , Ecology , vol. 82 , no. 6 , pp. 1655-1667 . https://doi.org/10.1890/0012-9658(2001)082[1655:SVITDB]2.0.CO;2 |
Schlagwörter: | Bewick's Swan / Cygnus columbianus bewickii / energy expenditure / fennel pondweed / giving-up density / Lauwersmeer / The Netherlands / optimal foraging / patch use / plant-herbivore interaction / Potamogeton pectinatus / sago pondweed / Tundra Swan / FUNCTIONAL-RESPONSE / SYSTEMS / SQUIRRELS / PATTERNS / DENSITY / HARVEST |
Sprache: | Englisch |
Permalink: | https://search.fid-benelux.de/Record/base-26826619 |
Datenquelle: | BASE; Originalkatalog |
Powered By: | BASE |
Link(s) : | https://hdl.handle.net/11370/d71d00ff-452b-4197-afed-05798b7bc64e |