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Spatiotemporal strategies that facilitate recruitment in a habitat specialist tree species

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.


Bar chart shows a comparison of M. fatua sapling densities (/m2) under the crowns versus away from crowns in eight Myristica swamp patches. Swamp sites, L1, L2, L3, L4 are large swamps while S1–S4 are small swamps.
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plw033-F3: Bar chart shows a comparison of M. fatua sapling densities (/m2) under the crowns versus away from crowns in eight Myristica swamp patches. Swamp sites, L1, L2, L3, L4 are large swamps while S1–S4 are small swamps.

Mentions: The density of established saplings from previous seasons was significantly higher under the crown versus away from crowns in S1 (χ2 =144.32, df =1, P 0.001) and S2 (χ2 = 27.16, df =1, P 0.001) sites, while in L1 similar densities were found (χ2 =1.48, df = 1, P = 0.223). Mean basal area of fruiting trees for large swamps, L1–L4, ranged from 1.60 to 4.237 m2/ha while for the small swamps, S1–S4, it ranged from 0.84 to 4.65 m2/ha. In seven of the eight Myristica swamps (three main and five additional sites), areas away from the crown had 60–98 % lower sapling densities than under crowns and thus sapling densities were 6-fold higher under crowns (Binomial GLMM-likelihood ratio test, χ2 =13.78, df =1, P < 0.001) (Fig. 3). Adult densities of the eight study swamps were comparable ranging from 0.001 to 0.003/m2.Figure 3.


Spatiotemporal strategies that facilitate recruitment in a habitat specialist tree species
Bar chart shows a comparison of M. fatua sapling densities (/m2) under the crowns versus away from crowns in eight Myristica swamp patches. Swamp sites, L1, L2, L3, L4 are large swamps while S1–S4 are small swamps.
© Copyright Policy - creative-commons
Related In: Results  -  Collection

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

plw033-F3: Bar chart shows a comparison of M. fatua sapling densities (/m2) under the crowns versus away from crowns in eight Myristica swamp patches. Swamp sites, L1, L2, L3, L4 are large swamps while S1–S4 are small swamps.
Mentions: The density of established saplings from previous seasons was significantly higher under the crown versus away from crowns in S1 (χ2 =144.32, df =1, P 0.001) and S2 (χ2 = 27.16, df =1, P 0.001) sites, while in L1 similar densities were found (χ2 =1.48, df = 1, P = 0.223). Mean basal area of fruiting trees for large swamps, L1–L4, ranged from 1.60 to 4.237 m2/ha while for the small swamps, S1–S4, it ranged from 0.84 to 4.65 m2/ha. In seven of the eight Myristica swamps (three main and five additional sites), areas away from the crown had 60–98 % lower sapling densities than under crowns and thus sapling densities were 6-fold higher under crowns (Binomial GLMM-likelihood ratio test, χ2 =13.78, df =1, P < 0.001) (Fig. 3). Adult densities of the eight study swamps were comparable ranging from 0.001 to 0.003/m2.Figure 3.

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.