Dispersal of Misteltoes by Honeyeaters and Flowerpeckers: Components of Seed Dispersal Quality

Ecology ◽  
1989 ◽  
Vol 70 (1) ◽  
pp. 137-145 ◽  
Author(s):  
Nick Reid
Keyword(s):  
Seed Dispersal ◽  
Dispersal Quality ◽  
Seed Dispersal Quality

scholarly journals Species richness matters for the quality of ecosystem services: a test using seed dispersal by frugivorous birds

2012 ◽  
Vol 279 (1740) ◽  
pp. 3106-3113 ◽  
Author(s):  
Daniel García ◽  
Daniel Martínez
Keyword(s):  
Seed Dispersal ◽  
Frugivorous Birds ◽  
Functional Complementarity ◽  
Dispersal Quality ◽  
Ecological Science ◽  
Current Paradigm ◽  
Anthropogenic Forest ◽  
A Current ◽  
Seed Dispersal Quality

The positive link between biodiversity and ecosystem functioning is a current paradigm in ecological science. However, little is known of how different attributes of species assemblages condition the quality of many services in real ecosystems affected by human impact. We explore the links between the attributes of a frugivore assemblage and the quantitative and qualitative components of its derived ecosystem service, seed dispersal, along a landscape-scale gradient of anthropogenic forest loss. Both the number and the richness of seeds being dispersed were positively related to frugivore abundance and richness. Seed dispersal quality, determined by the fine-scale spatial patterns of seed deposition, mostly depended on frugivore richness. In fact, richness was the only attribute of the frugivore assemblage affecting the probability of seed dispersal into deforested areas of the landscape. The positive relationships between frugivore richness per se (i.e. independent of frugivore abundance and composition) and all components of seed dispersal suggest the existence of functional complementarity and/or facilitation between frugivores. These links also point to the whole assemblage of frugivores as a conservation target, if we aim to preserve a complete seed dispersal service and, hence, the potential for vegetation regeneration and recovery, in human-impacted landscapes.

Seed dispersal, habitat selection and movement patterns in the Amazonian tortoise, Geochelone denticulata

2008 ◽  
Vol 29 (4) ◽  
pp. 463-472 ◽  
Author(s):  
Pablo Stevenson ◽  
Adriana Guzmán
Keyword(s):  
Population Density ◽  
Seed Dispersal ◽  
Habitat Use ◽  
Plant Species ◽  
Forest Type ◽  
Movement Patterns ◽  
Line Transect ◽  
Mark Recapture ◽  
High Solar Radiation ◽  
Dispersal Quality

AbstractThe Amazonian tortoise Geochelone denticulata may play an important role in forest dynamics due to its highly frugivorous diet, ability to disperse viable seeds, and predilection for resting in forest gaps for thermoregulation. The purpose of our study was to evaluate the species' effectiveness as a seed disperser. We measured dispersal quantity (abundance of seeds in feces, frequency of droppings, and population density of the disperser) and dispersal quality (movement patterns, habitat use, germination rates of dispersed seeds, and recruitment probabilities of seedlings) in a SW Amazonian forest, in Peru. Population density was calculated by mark-recapture and line-transect methods. Eight individuals were radio-tracked to monitor habitat use. Diet was described from fecal samples, which were washed to count seeds and for germination experiments. Seedling survival in different environmental conditions was monitored for three plant species. Population densities with mark-recapture estimates (0.15-0.31 individuals/ha) were much higher than with line transects estimates (0.0025 individuals/ha). Diet included fruit of 55 different plant species. Dispersed seeds had high germination rates (average 76%). In spite of their low activity, we documented long seed dispersal distances (average 89.6 m). Tortoises showed a marked preference for the open-canopy swampy forest, where long term recruitment was not favorable for seedlings of the species examined. However, the high solar radiation in this forest type promoted survival of pioneer seedlings in the short term. In conclusion, while G. denticulata did not perform a very efficient role in terms of the quantity of seed dispersal, the species can be considered efficient in many aspects of dispersal quality.

FRUGIVORIA E DISPERSÃO DE SEMENTES POR PEIXES

2008 ◽  
Vol 1 (1) ◽  
pp. 7-18
Author(s):  
Luciane Lopes de Souza
Keyword(s):  
Sustainable Development ◽  
Seed Dispersal ◽  
Tropical Forests ◽  
Natural Regeneration ◽  
Main Species ◽  
Fishing Gears ◽  
Solimões River

Biotic or abiotic processes of seed dispersal are important for the maintenance of the diversity, and for the natural regeneration in tropical forests. Ichthyochory is one of the fundamental mechanisms for seed dispersal in flooded environments, as the “igapó” forests. A study on the ichthyochory of the igapós was conducted at Amanã Sustainable Development Reserve, in the middle Solimões river, from June 2002 to September 2004. Monthly samples of frugivorous fish were taken, with the main fishing gears used locally. Guts of 1,688 fish caught were examined. The main species were Myloplus rubripinnis (29.21%), Hemiodus immaculatus (18.96%),Colossoma macropom um (16.23%) and Mylossoma duriventre (16.05%). The diet was made of vegetables (fruits, leave and flowers), and animals (arthropods). 53.02% of all fish caught ingested fruits. The total number of intact seeds in the stomachs and intestines were 8,069 and 5,763 respectively. About 61.9% of the Brycon melanopterus (matrinchão), 46.34% of the Brycon amazonicus (mamuri) and 30.22% of M . rubripinnis (parum ) analysed had intact seeds in their guts. Seeds of Nectandra amazonum and Genipa spruceana ingested proved to be more viable than those non-ingested by fish. The high rates of frugivory, the presence of intact seeds in the guts of fish and the greater viability of ingested seeds all suggest that these animals are important seed dispersors in the “igapó” forests of Amanã Reserve.

Mechanistic Analytical Models for Long-Distance Seed Dispersal by Wind

2005 ◽  
Vol 166 (3) ◽  
pp. 368 ◽  
Author(s):  
Katul ◽  
Porporato ◽  
Nathan ◽  
Siqueira ◽  
Soons ◽  
...  
Keyword(s):  
Seed Dispersal ◽  
Analytical Models ◽  
Long Distance

scholarly journals The onset of secondary seed dispersal is controlled by germination‐features: A neglected process in sudden saltmarsh establishment

2021 ◽  
Author(s):  
Zhiyuan Zhao ◽  
Liquan Zhang ◽  
Xiuzhen Li ◽  
Lin Yuan ◽  
Tjeerd J. Bouma
Keyword(s):  
Seed Dispersal ◽  
Secondary Seed Dispersal

Caching territoriality and site preferences by a scatter‐hoarder drive the spatial pattern of seed dispersal and affect seedling emergence

2021 ◽  
Author(s):  
Loreto Martínez‐Baroja ◽  
Lorenzo Pérez‐Camacho ◽  
Pedro Villar‐Salvador ◽  
Salvador Rebollo ◽  
Alexandro B. Leverkus ◽  
...  
Keyword(s):  
Seed Dispersal ◽  
Spatial Pattern ◽  
Seedling Emergence ◽  
Site Preferences

Animal‐mediated seed dispersal in India: Implications for conservation of India’s biodiversity

Biotropica ◽  
2021 ◽  
Author(s):  
Asmita Sengupta
Keyword(s):  
Seed Dispersal

Effects of changes in bird community composition and species abundance on plant reproduction, through pollination and seed dispersal

Ibis ◽  
2021 ◽  
Author(s):  
Sandra H. Anderson ◽  
Jenny J. Ladley ◽  
Alastair W. Robertson ◽  
Dave Kelly
Keyword(s):  
Seed Dispersal ◽  
Community Composition ◽  
Species Abundance ◽  
Bird Community ◽  
Plant Reproduction
Sign in / Sign up

Export Citation Format

Share Document