scholarly journals Coast Redwood Regeneration Survival and Growth in Mendocino County, California

2007 ◽  
Vol 22 (3) ◽  
pp. 171-175 ◽  
Author(s):  
Marc J. Jameson ◽  
Timothy A. Robards
Keyword(s):  
Seedling Survival ◽  
Survival Rates ◽  
Coast Redwood ◽  
Second Growth ◽  
Mendocino County ◽  
The Status ◽  
Survival And Growth ◽  
Stock Types ◽  
Redwood Forest ◽  
Future Growth

Abstract Three stands of second-growth redwood forest were clearcut, and the logging slash in two of the units was broadcast burned following logging. Three types of redwood seedlings (plug, plug-one, and 2-year bareroot) were planted following logging and burning. Seedling survival rates were high, and there were no significant differences between survival and growth of stock types after 9 years. The native redwood sprouts were substantially larger than the planted seedlings, in both height and diameter, which could affect future growth of some seedlings. The status and dimensions of seedlings and native regeneration were periodically checked. The burned units were fully occupied by a dense, tall growth of brush within a few years, and the brush became re-established after a successful initial herbicide treatment.

Light-dependent seedling survival and growth of four tree species in Costa Rican second-growth rain forests

2005 ◽  
Vol 21 (4) ◽  
pp. 383-395 ◽  
Author(s):  
Silvia Iriarte Vivar Balderrama ◽  
Robin L. Chazdon
Keyword(s):  
Tree Species ◽  
Seedling Survival ◽  
Light Availability ◽  
Light Transmittance ◽  
Growth Responses ◽  
Low Light ◽  
Growth Increments ◽  
Light Gradient ◽  
Second Growth ◽  
Survival And Growth

The dependence of tree seedling survival and growth on light availability was evaluated over 15 mo in three second-growth, wet forest stands (15–18 y old) in north-eastern Costa Rica. Seedlings of four canopy tree species (Dipteryx panamensis, Hyeronima alchorneoides, Virola koschnyi and Vochysia guatemalensis) were planted into four canopy treatments in three replicated stands and in a pasture site, spanning a nearly complete gradient of light availability. Survival and growth of all species increased in response to increasing light availability, but species differed in survival in shaded microsites (6–20% light transmittance) and in growth increments per light increase. Hyeronima showed the highest mortality at low light levels and the highest relative height growth increase per light increase. In contrast, Virola showed high survival at low and moderate light, but showed the lowest leaf area and above-ground biomass per light increase among all species. Dipteryx and Vochysia maintained relatively high rates of survival and growth across the entire light gradient. Hyeronima and Virola showed trade-offs between growth and survival responses to light, unlike Dipteryx and Vochysia. Differences among species in seedling survival at low light may be determined by a variety of physiological and morphological traits that may or may not be mechanistically linked to growth responses.

Survival and growth response of white spruce stock types to site preparation in Alaska

2011 ◽  
Vol 41 (4) ◽  
pp. 793-809 ◽  
Author(s):  
Andrew Youngblood ◽  
Elizabeth Cole ◽  
Michael Newton
Keyword(s):  
Picea Glauca ◽  
Seedling Survival ◽  
White Spruce ◽  
Site Preparation ◽  
Herbicide Application ◽  
Preparation Methods ◽  
Vegetation Control ◽  
Survival And Growth ◽  
Stock Types ◽  
Bare Root

To identify suitable methods for reforestation, we evaluated the interacting effects of past disturbance, stock types, and site preparation treatments on white spruce (Picea glauca (Moench) Voss) seedling survival and growth across a range of sites in Alaska. Replicated experiments were established in five regions. At each site, two complete installations differed in time since disturbance: “new” units were harvested immediately before spring planting and “old” units were harvested at least 3 years before planting. We compared mechanical scarification before planting, broadcast herbicide application during the fall before planting, and no site preparation with 1-year-old container-grown seedlings from two sources, 2-year-old bare-root transplants from two sources, and 3-year-old bare-root transplants. Seedlings were followed for 11 years on most sites. Based on meta-analyses, seedling survival increased 10% with herbicide application and 15% with mechanical scarification compared with no site preparation. Scarification and herbicide application increased seedling height by about 28% and 35%, respectively, and increased seedling volume by about 86% and 195%, respectively, compared with no site preparation. Soil temperature did not differ among site preparation methods after the first 7 years. Results suggest that white spruce stands may be successfully restored through a combination of vegetation control and use of quality planting stock.

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 Prunus Africana Provenances Growth and Survival Evaluation in the Highland of Awi zone, Amhara Region, North Western Ethiopia

2018 ◽  
Author(s):  
Abraham Demekristos
Keyword(s):  
Light Exposure ◽  
Seedling Survival ◽  
Block Design ◽  
Soil Water Potential ◽  
Mean Value ◽  
Good Growth ◽  
Growth And Survival ◽  
Prunus Africana ◽  
Survival And Growth ◽  
Establishment Rate

The aims of the study were to evaluate seedling growth and survival of Prunus africana provenances in awi highland based on ecological requirement of the tree. We measured survival and growth of three P.africana provenances seedlings found in Ethiopia (provenances sources namely: Gedeo, Jibat and Munnessa). Design of experiment with randomized complete block design (RCBD) with three replications. Seedlings planted at 2m, 2.5m and 3m distance between plants, plot, and blocks respectively. A plot size of 10mx10m and 25 plants are found per plot (0.01ha). We used ANOVA to test differences in survival, and growth among provenances over time. Results concluded that, provenances have no significant variation among in establishment rate, plant height and collar diameter growth. Of these provenances, Jibat was the first in establishment (56%), second in height (1.97m) and diameter (2.89cm). Gedeo was stood first in height (2.30m) but second in establishment rate (52%) and thickness(3.45cm), but Munessa with very good growth in diameter(3.59cm) might be prefreed for bark extraction followed by Gedeo, last in height (1.75m),but established second (52%). Contrary to expectations, seedlings were still at substantial risk of mortality &ge;3 years after planting. Probably the plants survival rate and growth probably affected by altitude, soil water potential, light exposure, and wild animal presence in the surrounding. In steep slope sites, canopy shade, existing weed vegetation as well as wild animals such as apes is unlikely to enhance seedling survival after planting. Our results suggest that seedling mean growth increased with 0.008mm thickness and 0.41mm per day while 2.8mm thickness and 146.8mm tall increment recorded in 2560meter elevated high land or injibara with mean value of 18.5&deg;C and rain fall is 1300mm.

scholarly journals Seedling Survival and Growth of Tree Species: Site Condition and Seasonality in Tropical Dry Forest Restoration

2014 ◽  
Vol 90 (3) ◽  
pp. 313
Author(s):  
CLAUDIA ALVAREZ-AQUINO ◽  
GUADALUPE WILLIAMS-LINERA
Keyword(s):  
Forest Restoration ◽  
Seedling Survival ◽  
Tropical Dry Forest ◽  
Dry Forest ◽  
Cedrela Odorata ◽  
Guazuma Ulmifolia ◽  
Survival And Growth ◽  
Tabebuia Rosea ◽  
Dry Forest Restoration ◽  
Ceiba Aesculifolia

La restauración del bosque tropical seco es prioritaria por ser el bosque más amenazado. En Veracruz, el bosque seco se ha reducido al 7% de su cobertura original. Nuestro objetivo fue determinar el efecto de la condición del sitio a restaurar y la estacionalidad en la supervivencia y tasa de crecimiento relativo en altura y diámetro de especies de árboles nativos. Estudiamos el desempeño de plántulas durante dos estaciones secas y dos lluviosas, y el efecto de la vegetación leñosa existente &gt; 1 m de altura. Se trasplantaron 960 plantas: 40 individuos de seis especie (Cedrela odorata, Ceiba aesculifolia, Guazuma ulmifolia, Ipomoea wolcottiana, Luehea candida, Tabebuia rosea) en cuatro sitios abandonados. La supervivencia y la tasa de crecimiento relativo se registraron cada cuatro meses durante dos años. La mayor supervivencia se observó en sitios con mayor riqueza de especies arbóreas y la tasa de crecimiento relativo en altura estuvo positivamente correlacionada con la altura de la vegetación existente. La mayor tasa de crecimiento relativo para especies y sitios se registró durante la estación lluviosa. En el sitio con menos vegetación, el desempeño de las plántulas fue pobre y sólo Guazuma sobrevivió. Ceiba mostró la mayor supervivencia (82-90%) pero una tasa de crecimiento relativo baja; Guazuma presentó una supervivencia elevada (20-94%) y la mayor tasa de crecimiento relativo; Cedrela mostró la menor supervivencia (3-7%) y tasa de crecimiento relativo alta. Los resultados sugieren que la vegetación del sitio, la estacionalidad y las especies afectan el desempeño de las plántulas durante el establecimiento temprano. La implicación en términos de la restauración ecológica es la importancia de aprovechar la vegetación existente aunque ésta sea escasa.

Sign in / Sign up

Export Citation Format

Share Document