The Relative Importance of Fungal Infection, Conspecific Density and Environmental Heterogeneity for Seedling Survival in a Dominant Tropical Tree

Biotropica ◽  
2013 ◽  
Vol 45 (5) ◽  
pp. 587-593 ◽  
Author(s):  
Wirong Chanthorn ◽  
Trevor Caughlin ◽  
Sukhum Dechkla ◽  
Warren Y. Brockelman
Keyword(s):  
Fungal Infection ◽  
Environmental Heterogeneity ◽  
Seedling Survival ◽  
Tropical Tree ◽  
Relative Importance ◽  
Conspecific Density

scholarly journals Seedling survival declines with increasing conspecific density in a common temperate tree

Ecosphere ◽  
2020 ◽  
Vol 11 (11) ◽  
Author(s):  
Fiona V. Jevon ◽  
Sydne Record ◽  
John Grady ◽  
Ashley K. Lang ◽  
David A. Orwig ◽  
...  
Keyword(s):  
Seedling Survival ◽  
Conspecific Density

Biotic and abiotic drivers of dipterocarp seedling survival following mast fruiting in Malaysian Borneo

2014 ◽  
Vol 31 (2) ◽  
pp. 129-137 ◽  
Author(s):  
Chiaki Oshima ◽  
Yuji Tokumoto ◽  
Michiko Nakagawa
Keyword(s):  
Survival Data ◽  
Species Coexistence ◽  
Seedling Survival ◽  
Abiotic Factors ◽  
Canopy Openness ◽  
Relative Importance ◽  
Tropical Rain Forests ◽  
Seedling Density ◽  
Mast Fruiting ◽  
General Flowering

Abstract:South-East Asian tropical rain forests experience sporadic, but profuse, seed production after general flowering, leading to the synchronous emergence of various seedlings and subsequent seedling dynamics, which play a crucial role in determining species distribution and coexistence. We examined the relative importance of both biotic (initial height, conspecific seedling density) and abiotic (canopy openness, per cent sand, soil water content) drivers using survival data for 1842 seedlings of 12 dipterocarp species for 1.5 y following mast fruiting in an old-growth Bornean tropical rain forest. More than 30% of all dipterocarp seedlings survived 1.5 y after mast fruiting. When all species were analysed together, we found that initial seedling height, canopy openness and conspecific seedling density affected dipterocarp seedling survival. Negative density dependence indicated that predators were not satiated, but dipterocarp seedlings rather suffered from host-specific natural enemies or intraspecific competition. Species-level analyses of seven dipterocarp species showed large variation in response to biotic and abiotic factors. These results suggest that interspecific differences in the relative importance of biotic and abiotic effects on seedling survival might contribute to species coexistence.

scholarly journals Impacts of logging on density-dependent predation of dipterocarp seeds in a South East Asian rainforest

2011 ◽  
Vol 366 (1582) ◽  
pp. 3246-3255 ◽  
Author(s):  
Robert Bagchi ◽  
Christopher D. Philipson ◽  
Eleanor M. Slade ◽  
Andy Hector ◽  
Sam Phillips ◽  
...  
Keyword(s):  
East Asia ◽  
Large Scale ◽  
Species Coexistence ◽  
Seedling Survival ◽  
Spatial Scales ◽  
Small Scale ◽  
South East Asia ◽  
Similar Data ◽  
Neotropical Forests ◽  
Conspecific Density

Much of the forest remaining in South East Asia has been selectively logged. The processes promoting species coexistence may be the key to the recovery and maintenance of diversity in these forests. One such process is the Janzen–Connell mechanism, where specialized natural enemies such as seed predators maintain diversity by inhibiting regeneration near conspecifics. In Neotropical forests, anthropogenic disturbance can disrupt the Janzen–Connell mechanism, but similar data are unavailable for South East Asia. We investigated the effects of conspecific density (two spatial scales) and distance from fruiting trees on seed and seedling survival of the canopy tree Parashorea malaanonan in unlogged and logged forests in Sabah, Malaysia. The production of mature seeds was higher in unlogged forest, perhaps because high adult densities facilitate pollination or satiate pre-dispersal predators. In both forest types, post-dispersal survival was reduced by small-scale (1 m 2 ) conspecific density, but not by proximity to the nearest fruiting tree. Large-scale conspecific density (seeds per fruiting tree) reduced predation, probably by satiating predators. Higher seed production in unlogged forest, in combination with slightly higher survival, meant that recruitment was almost entirely limited to unlogged forest. Thus, while logging might not affect the Janzen–Connell mechanism at this site, it may influence the recruitment of particular species.

scholarly journals NEIGHBORHOOD AND COMMUNITY INTERACTIONS DETERMINE THE SPATIAL PATTERN OF TROPICAL TREE SEEDLING SURVIVAL

Ecology ◽  
2007 ◽  
Vol 88 (9) ◽  
pp. 2248-2258 ◽  
Author(s):  
Simon A. Queenborough ◽  
David F. R. P. Burslem ◽  
Nancy C. Garwood ◽  
Renato Valencia
Keyword(s):  
Spatial Pattern ◽  
Seedling Survival ◽  
Tropical Tree ◽  
Tree Seedling ◽  
Community Interactions

scholarly journals Seedling Survival in Forest Re-vegetation Sites within Wellington Peninsula

2021 ◽  
Author(s):  
◽  
Victor Anton Valades
Keyword(s):  
Urban Areas ◽  
Seedling Survival ◽  
Survival Rates ◽  
Plant Size ◽  
Mixed Effects Models ◽  
Soil Conditions ◽  
Relative Importance ◽  
Mortality Probability ◽  
The Status ◽  
Cabbage Tree

<p>Transplanting native seedlings is a widely used restoration tool to enhance biodiversity in urban areas. Due to labour and economic needs of this tool, it is crucial to maximise the survival rates of the transplanted seedlings. In this research, I monitored, over a six month period, the status of wineberry (Aristotelia serrata), cabbage tree (Cordyline australis) and lemonwood (Pittosporum eugenioides) seedlings in their initial years after transplanting. The seedlings, up to 4 years old, were located in 11 forest re-vegetation sites in Wellington city, New Zealand. Using mixed effects models to predict the mortality probability of each species, I analyse the relative importance that variables (e.g. soil conditions or grass competition) have in the mortality of the seedlings. Lemonwood seedlings experienced the lowest mortality rates (<2%), independent of age. The models predicting probability of mortality of wineberry and cabbage tree indicate that grass competition and water availability are crucial variables in the mortality of these species during the initial 6 months after transplanting. Combinations of plant size (e.g. height) and certain environmental variables (e.g. soil conditions or slope) crucially affect mortality of wineberry and cabbage trees from one to three years of age. Based on these results, I provide recommendations, such as appropriate planting date and ideal length of maintenance tasks, to maximise survival rates of native plants within the first years after transplanting. A longer monitoring period and similar research of other species are required to assist forest re-vegetation groups in Wellington city achieving more cost- and labour-efficient re-vegetation management.</p>

scholarly journals Light Converts Endosymbiotic Fungus to Pathogen, Influencing Seedling Survival and Niche-Space Filling of a Common Tropical Tree, Iriartea deltoidea

PLoS ONE ◽  
2011 ◽  
Vol 6 (1) ◽  
pp. e16386 ◽  
Author(s):  
Patricia Álvarez-Loayza ◽  
James F. White ◽  
Mónica S. Torres ◽  
Henrik Balslev ◽  
Thea Kristiansen ◽  
...  
Keyword(s):  
Seedling Survival ◽  
Tropical Tree ◽  
Niche Space ◽  
Space Filling ◽  
Iriartea Deltoidea

scholarly journals Seedling survival responses to conspecific density, soil nutrients, and irradiance vary with age in a tropical forest

Ecology ◽  
2016 ◽  
Vol 97 (9) ◽  
pp. 2406-2415 ◽  
Author(s):  
Sydne Record ◽  
Richard K. Kobe ◽  
Corine F. Vriesendorp ◽  
Andrew O. Finley
Keyword(s):  
Tropical Forest ◽  
Soil Nutrients ◽  
Seedling Survival ◽  
Conspecific Density
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