Seed dispersal capacity of Salix caprea L. assessed by seed trapping and parentage analysis

2019 ◽  
Vol 138 (3) ◽  
pp. 495-511 ◽  
Author(s):  
Katharina Tiebel ◽  
Ludger Leinemann ◽  
Bernhard Hosius ◽  
Robert Schlicht ◽  
Nico Frischbier ◽  
...  
Keyword(s):  
Seed Dispersal ◽  
Parentage Analysis ◽  
Dispersal Capacity ◽  
Salix Caprea

scholarly journals Pollen and seed dispersal of Brazil nut trees in the southwestern Brazilian Amazon

2018 ◽  
Vol 48 (3) ◽  
pp. 217-223
Author(s):  
Karina MARTINS ◽  
Raifanny da Silva Oliveira dos SANTOS ◽  
Tatiana de CAMPOS ◽  
Lúcia Helena de Oliveira WADT
Keyword(s):  
Genetic Diversity ◽  
Seed Dispersal ◽  
Pollen Dispersal ◽  
Brazilian Amazon ◽  
Parentage Analysis ◽  
Fixation Index ◽  
Gene Dispersal ◽  
Dispersal Capacity ◽  
Pollen And Seed Dispersal ◽  
Natural Stands

ABSTRACT Pollen and seed dispersal patterns greatly influence the spatial distribution of plant genetic diversity. Microsatellite-based parentage analysis provides accurate estimates of contemporary gene dispersal. Although most tropical trees have been shown to exhibit widespread pollen dispersal, few studies have estimated contemporary gene dispersal after seedling establishment. Bertholletia excelsa (Lecythidaceae) is pollinated by large-bodied bees, while previous seed-tracking experiments suggest their seeds are mainly dispersed across very short distances by scatter-hoarding rodents, who primarily act as seed predators. Here we used parentage analysis to provide contemporary estimates of pollen and seed dispersal in B. excelsa recruits. We examined six 25-ha plots located in two natural stands in the Acre River valley, in the southwestern Brazilian Amazon. We used 11 microsatellite markers to estimate genetic diversity and fixation index parameters in adults, seedlings and saplings. Genetic diversity was moderate and did not differ across size classes or sampling locations. We assigned pollen and seed parents for < 20% of the recruits, indicating that most events of realized gene flow occurred beyond our 25-ha plots. Only 10 parentage assignments were confirmed with 80% confidence. Pollen distance ranged from 33 to 372 m and seed dispersal from 58 to 655 m. Actual seed-dispersal distances were far greater than the estimates obtained in previous seed-tracking experiments. Thus, studies encompassing larger sampling areas are necessary to determine a more representative spatial scale of B. excelsa’s pollen and seed dispersal capacity in natural stands.

scholarly journals Bird‐mediated seed dispersal: reduced digestive efficiency in active birds modulates the dispersal capacity of plant seeds

Oikos ◽  
2014 ◽  
Vol 124 (7) ◽  
pp. 899-907 ◽  
Author(s):  
Erik Kleyheeg ◽  
Casper H. A. van Leeuwen ◽  
Mary A. Morison ◽  
Bart A. Nolet ◽  
Merel B. Soons
Keyword(s):  
Seed Dispersal ◽  
Digestive Efficiency ◽  
Dispersal Capacity ◽  
Plant Seeds

Seed dispersal capacity of sheep and goats in a near-coastal dry grassland habitat

2016 ◽  
Vol 17 (6) ◽  
pp. 508-515 ◽  
Author(s):  
O. Benthien ◽  
J. Bober ◽  
J. Castens ◽  
C. Stolter
Keyword(s):  
Seed Dispersal ◽  
Dispersal Capacity ◽  
Dry Grassland ◽  
Sheep And Goats

Seed dispersal capacity and post-dispersal fate of the invasive Spartina alterniflora in saltmarshes of the Yangtze Estuary

2016 ◽  
Vol 169 ◽  
pp. 158-163 ◽  
Author(s):  
Derong Xiao ◽  
Chao Zhang ◽  
Liquan Zhang ◽  
Zhenchang Zhu ◽  
Kun Tian ◽  
...  
Keyword(s):  
Seed Dispersal ◽  
Spartina Alterniflora ◽  
Yangtze Estuary ◽  
The Yangtze Estuary ◽  
Dispersal Capacity

scholarly journals Endozoochory and Germination of Selected Ingested Seeds by Malayan Box Turtles (Cuoraamboinensis) from Laguna Province, Philippines

2021 ◽  
pp. 19-27
Author(s):  
Kliff Eldry G. Ibañez ◽  
Larry V. Padilla
Keyword(s):  
Seed Germination ◽  
Seed Dispersal ◽  
Germination Rate ◽  
Dispersal Capacity ◽  
Plant Seed ◽  
Gut Passage ◽  
Significant Difference ◽  
Box Turtles ◽  
Percent Germination ◽  
Pass Through

Aims: Malayan box turtles’ (Cuoraamboinensis) ecological niche are essential in an ecosystem but are often overlooked. This study investigated the germination of selected seeds that passed through the gut of Malayan box turtles to determine its role in promoting seed dispersal and aiding seed germination. Study Design:Experimental approach. Place and Duration of Study:Pamantasan ng Lungsod ng Maynila (University of the City of Manila) and Dasmarinas, Cavite between June 2016 to March 2017. Methodology: The seeds that passed through the turtle’s gut (Gut Passed Seeds) and seeds that did not pass through its gut (Mechanically Extracted Seeds) underwent comparative germination test. The Germination Rate (GR) and Percent Germination (%GR) of each group were determined in the study.Seed shadowing was also conducted to evaluate the turtle’s seed dispersal capacity (endozoochory). Results: Results showed that after gut passage, seed GR and %GR were enhanced on Lycopersiconesculentum, Carica papaya, Psidiumguajava, and Muntingiacalabura. However, Germination Rate and Percent Germination of Passifloraquadrangularis decreased after gut passage. Statistical analyses revealed that there is a significant difference in the GR and %G of M. calabura and %G of L. esculentum, and P. quadrangularis. Thread trailing method showed that C. amboinensis can disperse seeds at a distance of 24.8 to 52.8 meters. Conclusion: This study demonstrates the important role of C. amboinensis in the ecosystem through its contribution to plant seed germination and dispersal.It showed that Malayan box turtles are not only seed dispersal agents but are also important in the germination of seeds that they have ingested and defecated.

scholarly journals Dispersal distances and migration rates at the arctic treeline in Siberia – a genetic and simulation-based study

2019 ◽  
Vol 16 (6) ◽  
pp. 1211-1224 ◽  
Author(s):  
Stefan Kruse ◽  
Alexander Gerdes ◽  
Nadja J. Kath ◽  
Laura S. Epp ◽  
Kathleen R. Stoof-Leichsenring ◽  
...  
Keyword(s):  
Seed Dispersal ◽  
Parentage Analysis ◽  
Dispersal Distance ◽  
Climate Feedback ◽  
The Arctic ◽  
Long Distance ◽  
Central Siberia ◽  
Migration Rates ◽  
Dispersal Distances ◽  
And Migration

Abstract. A strong temperature increase in the Arctic is expected to lead to latitudinal treeline shift. This tundra–taiga turnover would cause a positive vegetation–climate feedback due to albedo decrease. However, reliable estimates of tree migration rates are currently lacking due to the complex processes involved in forest establishment, which depend strongly on seed dispersal. We aim to fill this gap using LAVESI, an individual-based and spatially explicit Larix vegetation simulator. LAVESI was designed to simulate plots within homogeneous forests. Here, we improve the implementation of the seed dispersal function via field-based investigations. We inferred the effective seed dispersal distances of a typical open-forest stand on the southern Taymyr Peninsula (northern central Siberia) from genetic parentage analysis using eight nuclear microsatellite markers. The parentage analysis gives effective seed dispersal distances (median ∼10 m) close to the seed parents. A comparison between simulated and observed effective seed dispersal distances reveals an overestimation of recruits close to the releasing tree and a shorter dispersal distance generally. We thus adapted our model and used the newly parameterised version to simulate south-to-north transects; a slow-moving treeline front was revealed. The colonisation of the tundra areas was assisted by occasional long-distance seed dispersal events beyond the treeline area. The treeline (∼1 tree ha−1) advanced by ∼1.6 m yr−1, whereas the forest line (∼100 trees ha−1) advanced by only ∼0.6 m yr−1. We conclude that the treeline in northern central Siberia currently lags behind the current strong warming and will continue to lag in the near future.

scholarly journals Adapted dandelions trade dispersal for germination upon root herbivore attack

2020 ◽  
Vol 287 (1921) ◽  
pp. 20192930 ◽  
Author(s):  
Zoe Bont ◽  
Marc Pfander ◽  
Christelle A. M. Robert ◽  
Meret Huber ◽  
Erik H. Poelman ◽  
...  
Keyword(s):  
Seed Dispersal ◽  
Growth Parameters ◽  
Germination Rate ◽  
Dispersal Ability ◽  
Dispersal Capacity ◽  
Local Conditions ◽  
Melolontha Melolontha ◽  
Herbivore Attack ◽  
Dispersal Potential ◽  
Root Herbivore

A plant's offspring may escape unfavourable local conditions through seed dispersal. Whether plants use this strategy to escape insect herbivores is not well understood. Here, we explore how different dandelion ( Taraxacum officinale agg.) populations, including diploid outcrossers and triploid apomicts, modify seed dispersal in response to root herbivore attack by their main root-feeding natural enemy, the larvae of the common cockchafer Melolontha melolontha. In a manipulative field experiment, root herbivore attack increased seed dispersal potential through a reduction in seed weight in populations that evolved under high root herbivore pressure, but not in populations that evolved under low pressure. This increase in dispersal potential was independent of plant cytotype, but associated with a reduction in germination rate, suggesting that adapted dandelions trade dispersal for establishment upon attack by root herbivores. Analysis of vegetative growth parameters suggested that the increased dispersal capacity was not the result of stress flowering. In summary, these results suggest that root herbivory selects for an induced increase in dispersal ability in response to herbivore attack. Induced seed dispersal may be a strategy that allows adapted plants to escape from herbivores.

Seed mass, seed dispersal capacity, and seedling performance in aPinus sylvestrispopulation

Ecoscience ◽  
2003 ◽  
Vol 10 (2) ◽  
pp. 168-175 ◽  
Author(s):  
Sandrine Debain ◽  
Thomas Curt ◽  
Jacques Lepart
Keyword(s):  
Seed Dispersal ◽  
Seed Mass ◽  
Dispersal Capacity ◽  
Seedling Performance
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