scholarly journals Connecting Resource Tracking by Frugivores to Temporal Variation in Seed Dispersal Networks

2017 ◽  
Vol 5 ◽  
Author(s):  
Jason M. Gleditsch ◽  
Amy M. Hruska ◽  
Jeffrey T. Foster
Keyword(s):  
Seed Dispersal ◽  
Temporal Variation ◽  
Resource Tracking

Fruit resource tracking by hornbill species at multiple scales in a tropical forest in India

2015 ◽  
Vol 31 (6) ◽  
pp. 477-490 ◽  
Author(s):  
Rohit Naniwadekar ◽  
Charudutt Mishra ◽  
Aparajita Datta
Keyword(s):  
Seed Dispersal ◽  
Multiple Scales ◽  
Positive Association ◽  
Eastern Himalaya ◽  
Resource Tracking ◽  
Ripe Fruit ◽  
Intermediate Scale ◽  
Fruit Availability ◽  
Fruit Abundance ◽  
The Relationship

Abstract:The fruit-tracking hypothesis predicts a positive association between frugivores and fruit abundance over space and time. We documented hornbill diets and examined the relationship between fruit abundance and abundance of three hornbill species (Buceros bicornis, Rhyticeros undulatus and Aceros nipalensis) in the Eastern Himalaya from 2009–2012. The study was carried out at three scales: at the largest scale of the study area (15 km2), at the intermediate scale – eight 3-ha patches within the study area and at the smallest scale of individual fruiting trees. Ninety-one per cent of the 64 foraging sightings of the great hornbill were on figs while more than 50% of the foraging sightings of the wreathed (83) and rufous-necked hornbills (87) were on non-fig fruits. At the largest scale, wreathed hornbill abundance and ripe fruit abundance peaked in the non-breeding season. At the intermediate scale, wreathed hornbill abundance was positively associated with non-fig fruit availability while rufous-necked hornbill abundance was negatively associated with non-fig fruit availability. At the smallest scale, great and rufous-necked hornbill abundances were correlated with fig and non-fig fruit crop sizes, respectively. The three hornbill species track fruit availability at different scales based on diet, which has implications for their role in seed dispersal.

Temporal variation in food utilisation by three species of temperate demosponge

2013 ◽  
Vol 485 ◽  
pp. 91-103 ◽  
Author(s):  
A Perea-Blázquez ◽  
SK Davy ◽  
B Magana-Rodríguez ◽  
JJ Bell
Keyword(s):  
Temporal Variation ◽  
Food Utilisation
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