Relative Importance of Factors Controlling Germination and Seedling Survival in Adenostoma Chaparral

1975 ◽  
Vol 93 (1) ◽  
pp. 71 ◽  
Author(s):  
Norman L. Christensen ◽  
Cornelius H. Muller
Keyword(s):  
Seedling Survival ◽  
Relative Importance

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 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 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 Drivers of seedling survival in a temperate forest and their relative importance at three stages of succession

2015 ◽  
Vol 5 (19) ◽  
pp. 4287-4299 ◽  
Author(s):  
Yan Yan ◽  
Chunyu Zhang ◽  
Yuxi Wang ◽  
Xiuhai Zhao ◽  
Klaus Gadow
Keyword(s):  
Temperate Forest ◽  
Seedling Survival ◽  
Relative Importance ◽  
Three Stages

The relative importance of luminal and systemic signals in the control of intestinal iron absorption

2001 ◽  
Vol 120 (5) ◽  
pp. A678-A679
Author(s):  
G ANDERSON ◽  
S WILKINS ◽  
T MURPHY ◽  
G CLEGHORN ◽  
D FRAZER
Keyword(s):  
Iron Absorption ◽  
Relative Importance ◽  
Intestinal Iron Absorption ◽  
Systemic Signals
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