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Spatiotemporal strategies that facilitate recruitment in a habitat specialist tree species

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ABSTRACT

Species restricted to specialized, rare habitats such as Myristica fatua cannot afford to send propagules too far and risk arriving in inhospitable habitats. We followed the fate of seeds from fruiting till seedling establishment to examine ecological strategies such species employ to escape from seed predators and find the right germination sites. We found that M. fatua bears few large-sized seeds and fruits for extended periods of time such that few seeds are produced at any point of time, thus escaping detection of seed predators. Hornbills and crabs facilitate this by dispersing heavy seeds only to short distances within swamps.

No MeSH data available.


(A) Proportion of seeds dispersed by frugivores in the different microsites i.e. crown, away from conspecific crowns, edge of the swamp, and surrounding matrix in the three study swamps, S1, S2 and L1; bars represent mean (+SE) and (B) Secondary removal rates of dispersed (aril-removed) seeds from different microsites where seed deposition was observed.
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plw033-F2: (A) Proportion of seeds dispersed by frugivores in the different microsites i.e. crown, away from conspecific crowns, edge of the swamp, and surrounding matrix in the three study swamps, S1, S2 and L1; bars represent mean (+SE) and (B) Secondary removal rates of dispersed (aril-removed) seeds from different microsites where seed deposition was observed.

Mentions: Most seed dispersal was highly localized with dispersal distances in the three study swamps ranging from 0 to 15 m (Table 2). Seed deposition was the highest under crowns (Table 2, Fig. 2A). A large percentage of seeds dispersed by frugivores landed either under crowns of parent trees or in the matrix surrounding the swamp while the rest were deposited away from crowns but within the swamp or in the edge (Table 2). Microsite type had a significant effect on the pattern of seed dispersal (likelihood ratio test, χ2= 210.72, df = 3, P0.001) with most of the seeds reaching crown and matrix microsites. Proportion of seeds deposited under the crowns differed significantly from all the other three microsites i.e. away from crowns, edge and matrix (Tukey’s contrasts, P < 0.001, Table 3).Figure 2.


Spatiotemporal strategies that facilitate recruitment in a habitat specialist tree species
(A) Proportion of seeds dispersed by frugivores in the different microsites i.e. crown, away from conspecific crowns, edge of the swamp, and surrounding matrix in the three study swamps, S1, S2 and L1; bars represent mean (+SE) and (B) Secondary removal rates of dispersed (aril-removed) seeds from different microsites where seed deposition was observed.
© Copyright Policy - creative-commons
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4940510&req=5

plw033-F2: (A) Proportion of seeds dispersed by frugivores in the different microsites i.e. crown, away from conspecific crowns, edge of the swamp, and surrounding matrix in the three study swamps, S1, S2 and L1; bars represent mean (+SE) and (B) Secondary removal rates of dispersed (aril-removed) seeds from different microsites where seed deposition was observed.
Mentions: Most seed dispersal was highly localized with dispersal distances in the three study swamps ranging from 0 to 15 m (Table 2). Seed deposition was the highest under crowns (Table 2, Fig. 2A). A large percentage of seeds dispersed by frugivores landed either under crowns of parent trees or in the matrix surrounding the swamp while the rest were deposited away from crowns but within the swamp or in the edge (Table 2). Microsite type had a significant effect on the pattern of seed dispersal (likelihood ratio test, χ2= 210.72, df = 3, P0.001) with most of the seeds reaching crown and matrix microsites. Proportion of seeds deposited under the crowns differed significantly from all the other three microsites i.e. away from crowns, edge and matrix (Tukey’s contrasts, P < 0.001, Table 3).Figure 2.

View Article: PubMed Central - PubMed

ABSTRACT

Species restricted to specialized, rare habitats such as Myristica fatua cannot afford to send propagules too far and risk arriving in inhospitable habitats. We followed the fate of seeds from fruiting till seedling establishment to examine ecological strategies such species employ to escape from seed predators and find the right germination sites. We found that M. fatua bears few large-sized seeds and fruits for extended periods of time such that few seeds are produced at any point of time, thus escaping detection of seed predators. Hornbills and crabs facilitate this by dispersing heavy seeds only to short distances within swamps.

No MeSH data available.