The lateral extent of the subsidy from an upland stream to riparian lycosid spiders

Robert A. Briers, Helen M. Cariss, Rory Geoghegan, John H. R. Gee

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

Crynodeb

Adult aquatic insects emerging from streams can subsidize riparian food webs, but little is known of the spatial extent of these subsidies. Stable isotope (15N) enrichment of aquatic insects, principally a species of stonefly (Plecoptera: Leuctridae), emerging from an upland stream was used to trace the subsidy from the stream ecosystem to riparian spiders (Lycosidae). The downstream profile of spider δ15N correlated closely with that of adult stoneflies, indicating that they were deriving nutrition from aquatic sources. The contribution of adult aquatic insects to spider diets was determined using a two-source mixing model. Adult aquatic insects made up over 40% of spider diets adjacent to the stream, but
Iaith wreiddiolSaesneg
Tudalennau (o-i)165-170
Nifer y tudalennau6
CyfnodolynEcography
Cyfrol28
Rhif cyhoeddi2
Dyddiad ar-lein cynnar14 Maw 2005
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - Ebr 2005

Ôl bys

Gweld gwybodaeth am bynciau ymchwil 'The lateral extent of the subsidy from an upland stream to riparian lycosid spiders'. Gyda’i gilydd, maen nhw’n ffurfio ôl bys unigryw.

Dyfynnu hyn