Selective Advantages to Hemi-Parasitic Annuals, Genus Melampyrum, of a Seed-Dispersal Mutualism Involving Ants: I. Favorable Nest Sites

Oikos ◽  
1993 ◽  
Vol 67 (2) ◽  
pp. 334 ◽  
Author(s):  
William Gibson
Keyword(s):  
Seed Dispersal ◽  
Nest Sites ◽  
Seed Dispersal Mutualism

Anomalous, extreme weather disrupts obligate seed dispersal mutualism: snow in a subtropical forest ecosystem

2013 ◽  
Vol 19 (9) ◽  
pp. 2867-2877 ◽  
Author(s):  
Youbing Zhou ◽  
Chris Newman ◽  
Jin Chen ◽  
Zongqiang Xie ◽  
David W. Macdonald
Keyword(s):  
Seed Dispersal ◽  
Forest Ecosystem ◽  
Extreme Weather ◽  
Subtropical Forest ◽  
Seed Dispersal Mutualism

Mutual cheating strengthens a tropical seed dispersal mutualism

Ecology ◽  
2021 ◽  
Author(s):  
Lin Cao ◽  
Patrick A. Jansen ◽  
Bo Wang ◽  
Chuan Yan ◽  
Zhenyu Wang ◽  
...  
Keyword(s):  
Seed Dispersal ◽  
Seed Dispersal Mutualism

Pattern and impact of hornbill seed dispersal at nest trees in a moist evergreen forest in Thailand

2004 ◽  
Vol 20 (5) ◽  
pp. 545-553 ◽  
Author(s):  
Shumpei Kitamura ◽  
Takakazu Yumoto ◽  
Pilai Poonswad ◽  
Naohiko Noma ◽  
Phitaya Chuailua ◽  
...  
Keyword(s):  
Seed Dispersal ◽  
Breeding Season ◽  
Seedling Survival ◽  
Evergreen Forest ◽  
Seedling Mortality ◽  
Entire Process ◽  
Nest Sites ◽  
Seed Deposition ◽  
Number Of Seeds

Following the entire process of frugivore seed dispersal, from intake of seeds to seed deposition, is a difficult task. One alternative is to monitor areas of heavy seed rain deposited by animals. We quantified the number of seeds deposited by hornbills and followed the fates of these seedlings for 3 y to evaluate the effectiveness of hornbill seed dispersal at nest trees, on the basis of seedling survival. For 14 mo, fallen fruits and seeds were collected in traps established around four nest trees of each of two hornbill species (Aceros undulatus and Anthracoceros albirostris) and the seedlings were monitored in adjacent quadrats. Seedfall and seedlings of species represented in hornbill diets occurred at significantly higher densities in the traps/quadrats in front of nest cavities than in other traps/quadrats. Fewer seedling species and individuals germinated under nest trees than expected from the composition of the seedfall. Our results suggest that the quality of hornbill seed dispersal might be poor at nest trees due to the highly concentrated seedfall, which results in high seed and seedling mortality. Although seed deposition at nest trees is a useful guide to hornbill diet during the breeding season, it is clearly not of benefit to the plants involved. However, the pattern and consequences of hornbill seed dispersal at nest sites is likely very different from that during the non-breeding season.

Lowland gorillas and seed dispersal: The importance of nest sites

1998 ◽  
Vol 45 (1) ◽  
pp. 45-68 ◽  
Author(s):  
M. E. Rogers ◽  
B. C. Voysey ◽  
K. E. McDonald ◽  
R. J. Parnell ◽  
C. E. G. Tutin
Keyword(s):  
Seed Dispersal ◽  
Nest Sites ◽  
Lowland Gorillas

scholarly journals Patterns of roost site use by Asian hornbills and implications for seed dispersal

2020 ◽  
Author(s):  
Rohit Naniwadekar ◽  
Akanksha Rathore ◽  
Ushma Shukla ◽  
Aparajita Datta
Keyword(s):  
Seed Dispersal ◽  
Gps Telemetry ◽  
North East India ◽  
Nest Sites ◽  
North East ◽  
Roost Selection ◽  
Site Use ◽  
Riverine Habitats ◽  
Dispersal Distances ◽  
A Site

AbstractAnimals spend a significant amount of time roosting. Therefore, understanding roosting patterns and the processes that influence roosting behaviour and roost site choice is essential. Hornbills exhibit interesting roosting patterns with some species roosting communally in large flocks. They are important seed dispersers and patterns of roost site use can have a significant influence on seed dispersal distributions and thereby on plant recruitment. We documented roost site use by four Great Hornbills (Buceros bicornis) and one Wreathed Hornbill (Rhyticeros undulatus) at a site in north-east India using GPS telemetry. We examined the influence of riverine habitats, nests and foraging range on roost selection. We determined the proportion of seeds that hornbills disperse at roosts and the dispersal distances of seeds dispersed at roosts from the source trees. Through telemetry, we found that roosts of Great Hornbills were generally in forested habitats. Our telemetry data showed that Wreathed Hornbill roosts were close to the river. These results were corroborated by observational data from roost sites where we had regular detections of relatively large flocks of Wreathed Hornbills and occasionally Great Hornbills. The roost sites were not close to the nest sites and were generally within the 95% kernel density diurnal activity ranges. Hornbills dispersed a small proportion of seeds at roost sites. Seeds dispersed at roost sites had almost twice the dispersal distances compared to those dispersed at non-roost sites. This study highlights variation in roost site pattern across individual hornbills and its implications for seed dispersal.

The Bonobo-DialiumPositive Interactions: Seed Dispersal Mutualism

2013 ◽  
Vol 75 (4) ◽  
pp. 394-403 ◽  
Author(s):  
DAVID BEAUNE ◽  
FRANÇOIS BRETAGNOLLE ◽  
LOÏC BOLLACHE ◽  
GOTTFRIED HOHMANN ◽  
MARTIN SURBECK ◽  
...  
Keyword(s):  
Seed Dispersal ◽  
Seed Dispersal Mutualism
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