Seed Dispersal Distances and Plant Migration Potential in Tropical East Asia

Biotropica ◽  
2009 ◽  
Vol 41 (5) ◽  
pp. 592-598 ◽  
Author(s):  
Richard T. Corlett
Keyword(s):  
Seed Dispersal ◽  
East Asia ◽  
Plant Migration ◽  
Migration Potential ◽  
Dispersal Distances

scholarly journals Animal movement drives variation in seed dispersal distance in a plant–animal network

2019 ◽  
Vol 286 (1894) ◽  
pp. 20182007 ◽  
Author(s):  
E. Rehm ◽  
E. Fricke ◽  
J. Bender ◽  
J. Savidge ◽  
H. Rogers
Keyword(s):  
Seed Dispersal ◽  
Animal Movement ◽  
Bird Species ◽  
Dispersal Distance ◽  
Dispersal Patterns ◽  
Long Distance ◽  
Gut Passage ◽  
Dispersal Distances ◽  
Seed Dispersal Distance ◽  
Passage Times

Frugivores play differing roles in shaping dispersal patterns yet seed dispersal distance is rarely quantified across entire communities. We model seed dispersal distance using gut passage times and bird movement for the majority (39 interactions) of known bird–tree interactions on the island of Saipan to highlight differences in seed dispersal distances provided by the five avian frugivores. One bird species was found to be a seed predator rather than a disperser. The remaining four avian species dispersed seeds but differences in seed dispersal distance were largely driven by interspecific variation in bird movement rather than intraspecific variation in gut passage times. The median dispersal distance was at least 56 m for all species-specific combinations, indicating all species play a role in reducing high seed mortality under the parent tree. However, one species—the Micronesian Starling—performed 94% of dispersal events greater than 500 m, suggesting this species could be a key driver of long-distance dispersal services (e.g. linking populations, colonizing new areas). Assessing variation in dispersal patterns across this network highlights key sources of variation in seed dispersal distances and suggests which empirical approaches are sufficient for modelling how seed dispersal mutualisms affect populations and communities.

scholarly journals Johnsongrass (Sorghum halepense) Seed Dispersal in Corn Crops under Mediterranean Conditions

Weed Science ◽  
2012 ◽  
Vol 60 (1) ◽  
pp. 34-41 ◽  
Author(s):  
Judit Barroso ◽  
Dionisio Andújar ◽  
Carolina San Martín ◽  
César Fernández-Quintanilla ◽  
José Dorado
Keyword(s):  
Seed Dispersal ◽  
Soil Surface ◽  
Dispersal Pattern ◽  
Natural Factors ◽  
Vacuum Device ◽  
Combine Harvester ◽  
The Difference ◽  
Dispersal Distances ◽  
Natural Dispersal

Natural dissemination of johnsongrass seeds as well as the effect of combine harvesting on this process were studied in corn fields. The estimation of natural dispersal was carried out by two different methods, collecting seeds throughout the season using seed traps and sampling soil–surface seed abundance before harvest using a vacuum device. Both methods showed the same dispersal pattern. A minimum of 84.6% was dispersed in the first 2 m from the focus and a maximum of 1.6% was dispersed beyond the first 5 m. An average of 76.3% of these dispersed seeds were lost or buried after shedding but before harvest. Seed dispersal by the combine harvester was estimated from the difference between soil–surface seed abundance in the same sites pre and postharvest. Although the quantity of seeds dispersed by the combine was similar to those dispersed by natural factors, dispersal distances were significantly higher. Around 90% of the dispersed seeds were found in the first 5 m forward and backward of the combine direction from the infestation source, and 1.6% of the seeds were found beyond 22 m forward and 10 m backward of the combine direction from the infestation source. A large proportion of the seeds dispersed were dormant or not viable. It is concluded that the major role of sexual reproduction in johnsongrass population dynamics may be to spread the risks, promoting dispersal in time and space.

scholarly journals Community‐wide seed dispersal distances peak at low levels of specialisation in size‐structured networks

Oikos ◽  
2020 ◽  
Vol 129 (11) ◽  
pp. 1727-1738
Author(s):  
Marjorie C. Sorensen ◽  
Isabel Donoso ◽  
Eike Lena Neuschulz ◽  
Matthias Schleuning ◽  
Thomas Mueller
Keyword(s):  
Seed Dispersal ◽  
Low Levels ◽  
Dispersal Distances

scholarly journals Long seed dispersal distances by an inquisitive flightless rail ( Gallirallus australis ) are reduced by interaction with humans

2019 ◽  
Vol 6 (8) ◽  
pp. 190397
Author(s):  
Joanna K. Carpenter ◽  
Colin F. J. O'Donnell ◽  
Elena Moltchanova ◽  
Dave Kelly
Keyword(s):  
Seed Dispersal ◽  
Mechanistic Model ◽  
Human Interaction ◽  
Time Data ◽  
Seed Retention ◽  
Function Loss ◽  
The Mean ◽  
Human Use ◽  
Dispersal Distances ◽  
Seed Retention Time

Human presence is becoming increasingly ubiquitous, but the influence this has on the seed dispersal services performed by frugivorous animals is largely unknown. The New Zealand weka ( Gallirallus australis ) is an inquisitive flightless rail that frequently congregates in areas of high human use. Weka are important seed dispersers, yet the seed dispersal services they provide are still poorly understood. We estimated seed dispersal distances of weka for two plant species ( Prumnopitys ferruginea and Elaeocarpus dentatus ) and tested how human interaction affected these dispersal distances. We estimated weka seed dispersal distances by combining GPS data from 39 weka over three sites with weka seed retention time data in a mechanistic model. The mean seed retention times were extremely long (38–125 h). Weka were highly effective dispersers, dispersing 93–96% of seeds away from parent canopies, and 1% of seeds over 1 km. However, we found evidence of a significant human impact on the seed dispersal distances of weka, with birds occupying areas of high human use performing 34.8–40.9% shorter distances than their more remote counterparts. This represents an example of cryptic function loss, where although weka are still present in the ecosystem, their seed dispersal services are impaired by human interaction.

Conventional and genetic measures of seed dispersal for Dipteryx panamensis (Fabaceae) in continuous and fragmented Costa Rican rain forest

2007 ◽  
Vol 23 (6) ◽  
pp. 635-642 ◽  
Author(s):  
Thor Hanson ◽  
Steven Brunsfeld ◽  
Bryan Finegan ◽  
Lisette Waits
Keyword(s):  
Seed Dispersal ◽  
Costa Rican ◽  
Forest Fragments ◽  
Molecular Tools ◽  
Evolutionary Potential ◽  
Dipteryx Panamensis ◽  
Continuous Forest ◽  
Adult Trees ◽  
Significant Difference ◽  
Dispersal Distances

The effects of habitat fragmentation on seed dispersal can strongly influence the evolutionary potential of tropical forest plant communities. Few studies have combined traditional methods and molecular tools for the analysis of dispersal in fragmented landscapes. Here seed dispersal distances were documented for the tree Dipteryx panamensis in continuous forest and two forest fragments in Costa Rica, Central America. Distance matrices were calculated between adult trees (n = 283) and the locations of seeds (n = 3016) encountered along 100 × 4-m transects (n = 77). There was no significant difference in the density of seeds dispersed > 25 m from the nearest adult (n = 253) among sites. There was a strong correlation between the locations of dispersed seeds and the locations of overstorey palms favoured as bat feeding roosts in continuous forest and both fragments. Exact dispersal distances were determined for a subset of seeds (n = 14) from which maternal endocarp DNA could be extracted and matched to maternal trees using microsatellite analysis. Dispersal within fragments and from pasture trees into adjacent fragments was documented, at a maximum distance of 853 m. Results show no evidence of a fragmentation effect on D. panamensis seed dispersal in this landscape and strongly suggest bat-mediated dispersal at all sites.

Modeling Seed Dispersal Distances: Implications For Transgenic Pinus Taeda

2006 ◽  
Vol 16 (1) ◽  
pp. 117-124 ◽  
Author(s):  
Claire G. Williams ◽  
Shannon L. LaDeau ◽  
Ram Oren ◽  
Gabriel G. Katul
Keyword(s):  
Seed Dispersal ◽  
Pinus Taeda ◽  
Dispersal Distances

scholarly journals Rodent-mediated plant community competition: what happens to the seeds after entering the adjacent stands?

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Haibin Kang ◽  
Mingjie Chang ◽  
Shutong Liu ◽  
Zhi Chao ◽  
Xinping Zhang ◽  
...  
Keyword(s):  
Seed Dispersal ◽  
Plant Communities ◽  
Pine Forests ◽  
Forest Community ◽  
Forest Composition ◽  
Oak Forests ◽  
Scatter Hoarding ◽  
Dispersal Distances ◽  
Seed Fates ◽  
Developmental Dynamics

Abstract Background Seed dispersal by scatter-hoarding animals can affect the developmental dynamics of plant communities. However, how animals might participate in plant inter-community competition has rarely been investigated. Forest community junction is an area where the competition between plant communities is most prominent and animal activity is more frequent. At present, little is known about how scatter-hoarding animals might assist competitions by adjacent plant communities. Thus, for 3 years (2015–2017), we tracked the fate of 2880 tagged seeds (Quercus aliena var. acuteserrata, Pinus tabuliformis, and P. armandii seed) placed near an edge where the forest composition changes from a pine forest to an oak forest in northwestern China. Results We found that the seed fates differed when Quercus and Pinus seeds entered adjacent stands. In contrast to Pinus seeds, acorns that entered pine forests were characterized by higher caching rates and longer dispersal distances. Pinus seeds had the highest probability of being predated (85%) by rodents, and eleven Q. aliena var. acuteserrata seedlings were established in pine forests, although none survived in the later stages. In addition, rodents exhibited obvious selectivity in terms of the microhabitats for the seed caching sites. Conclusions Seed fates differed when Quercus and Pinus seeds entered adjacent stands. The predation pressure by rodents on the seeds of Pinus species limited the germination of seeds and seedling establishment in oak forests. The different seed fates after their bidirectional dispersal could affect the differences in natural regeneration between pine and oak forests, and they might increase the recruitment rates for oak at the edge of an adjacent community. Rodent-mediated seed dispersal could potential unintentionally affect the competition between plant communities.

Sign in / Sign up

Export Citation Format

Share Document