Chinchillavermittlungsforum

Willkommen auf unserem Infoportal - kompetent und tierwohlorientiert
 
StartseiteStartseite  PortalPortal  GalerieGalerie  FAQFAQ  SuchenSuchen  AnmeldenAnmelden  Login  

Teilen | 
 

 Goheen, J. R. et al.: Food-hoarding behavior of gray squirrels and North American red squirrels in the central hardwoods region: implications for forest regeneration

Nach unten 
AutorNachricht
Flora
Admin & Mod
Admin & Mod
avatar

Anzahl der Beiträge : 11663
Anmeldedatum : 10.07.11
Alter : 34
Ort : Speyer

BeitragThema: Goheen, J. R. et al.: Food-hoarding behavior of gray squirrels and North American red squirrels in the central hardwoods region: implications for forest regeneration   21.11.12 21:50

Jacob R. Goheen and Robert K. Swihart: Food-hoarding behavior of gray squirrels and North American red squirrels in the central hardwoods region: implications for forest regeneration.
In: Can. J. Zool. 81: 1636–1639 (2003).

Link: http://web.ics.purdue.edu/~rswihart/pdf/CJZ_Hoardingms.pdf


Zitat :
Abstract

The North American red squirrel (Tamiasciurus hudsonicus) has expanded its geographic range into the state of Indiana concurrently with a decline in populations of gray squirrels (Sciurus carolinensis) throughout portions of the central hardwoods region of the United States that have been converted to intensive agriculture. Red squirrels construct larder hoards and function as seed predators throughout much of their geographic range. In contrast, gray squirrels construct scatter hoards and thus function as seed dispersers in addition to eating seeds. We conducted field observations to discern whether hoarding behavior differed between the two species in a deciduous forest stand near the southern limit of the range of red squirrels. Red squirrels were more likely to hoard walnuts and acorns in larders or trees, whereas gray squirrels were more likely to scatter-hoard mast items. We present a simple model to illustrate the potential impact of interspecific differences in hoarding on germination success of black walnut. Our results suggest that red squirrels are unable to compensate completely for the loss of gray squirrels as seed dispersers in portions of the central hardwoods region that have been transformed by agriculture.

_________________
Es grüßt Flora mit den Plüschbällchen Luise, Tobi, Kevin, Mathilda und Stuart großes Herz 

Tierquälerei beginnt schon bei der Missachtung der natürlichen Bedürfnisse von Tieren.
Prof. Dr. Helmut Pechlaner
Nach oben Nach unten
http://www.chinchilla-scientia.de
 
Goheen, J. R. et al.: Food-hoarding behavior of gray squirrels and North American red squirrels in the central hardwoods region: implications for forest regeneration
Nach oben 
Seite 1 von 1

Befugnisse in diesem ForumSie können in diesem Forum nicht antworten
Chinchillavermittlungsforum :: Austausch rund um Chinchillas & andere Tiere :: Literatur und Sonstiges :: Chinchillaliteratur & Literatur zu Kleinsäugern :: Literatur zu anderen Kleintierarten :: Granivore :: Hörnchenliteratur-
Gehe zu: