Qualitative Aspects of Seed Dispersal Effectiveness by Mantled Howler Monkeys (Alouatta palliata mexicana): The Case of Three Species of the Moraceae Family
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View abstract on PubMed
Summary
This summary is machine-generated.Mantled howler monkeys do not scarify seeds, impacting germination differently. Seed pulp removal, not scarification, may aid germination and establishment for these frugivores.
Area Of Science
- Ecology
- Botany
- Primatology
Background
- Howler monkeys are recognized as vital seed dispersers.
- The effects of their digestive tract on seed germination remain largely unexplored.
Purpose Of The Study
- To investigate if mantled howler monkey digestion scarifies Moraceae seeds.
- To determine if scarification enhances seed water permeability and germination rates.
Main Methods
- Comparative analysis of intact seeds, seeds from droppings, and chemically scarified seeds.
- Micromorphological examination, water permeability tests, and germination assays were performed.
Main Results
- Howler monkey digestion did not scarify seeds or improve water absorption.
- Germination showed mixed results: positive for Ficus americana, negative for Ficus insipida.
- Chemical scarification reduced seed coat thickness but decreased viability and prevented germination.
Conclusions
- Seed coat scarification is not beneficial and may harm small seeds.
- Pulp removal by howler monkeys likely facilitates germination by cleaning and dispersing seeds.
- Frugivore activity enhances seed dispersal and establishment probability.
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