Comparison of selected Douglas-fir seed sources for cambial and leader growth patterns in four western Oregon environments

1977 ◽  
Vol 7 (1) ◽  
pp. 154-164 ◽  
Author(s):  
William H. Emmingham
Keyword(s):  
Growth Rate ◽  
British Columbia ◽  
Growth Pattern ◽  
Douglas Fir ◽  
Growth Patterns ◽  
Seasonal Growth ◽  
Growth Duration ◽  
Cambial Growth ◽  
Seed Sources ◽  
Definite Pattern

The leader and cambial growth of sapling Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) from both inland and coastal varieties followed a definite pattern in four western Oregon environments. Generally, buds became active first and cambial growth became active soon after. Leader growth stopped in August, long before cambial growth, which continued into October. Phenology, total seasonal growth, and growth pattern for trees from coastal sources from Vancouver Island, B.C., to southern Oregon were more similar than for trees from inland sources from British Columbia to Idaho and Arizona. Most of the differences among populations in one season's growth were related to growth rate rather than growth duration.

scholarly journals A Proposed Methodology to Analyze Plant Growth and Movement from Phenomics Data

2019 ◽  
Vol 11 (23) ◽  
pp. 2839 ◽  
Author(s):  
María Victoria Díaz-Galián ◽  
Fernando Perez-Sanz ◽  
Jose David Sanchez-Pagán ◽  
Julia Weiss ◽  
Marcos Egea-Cortines ◽  
...  
Keyword(s):  
Growth Rate ◽  
Additive Model ◽  
Area Under The Curve ◽  
Growth Patterns ◽  
Reference Points ◽  
Growth Potential ◽  
Petunia X Hybrida ◽  
Growth Duration ◽  
Transformation Curve ◽  
Growth Habits

Image analysis of developmental processes in plants reveals both growth and organ movement. This study proposes a methodology to study growth and movement. It includes the standard acquisition of internal and external reference points and coordinates, coordinates transformation, curve fitting and the corresponding statistical analysis. Several species with different growth habits were used including Antirrhinum majus, A. linkianum, Petunia x hybrida and Fragaria x ananassa. Complex growth patterns, including gated growth, could be identified using a generalized additive model. Movement, and in some cases, growth, could not be adjusted to curves due to drastic changes in position. The area under the curve was useful in order to identify the initial stage of growth of an organ, and its growth rate. Organs displayed either continuous movements during the day with gated day/night periods of maxima, or sharp changes in position coinciding with day/night shifts. The movement was dependent on light in petunia and independent in F. ananassa. Petunia showed organ movement in both growing and fully-grown organs, while A. majus and F. ananassa showed both leaf and flower movement patterns linked to growth. The results indicate that different mathematical fits may help quantify growth rate, growth duration and gating. While organ movement may complicate image and data analysis, it may be a surrogate method to determine organ growth potential.

scholarly journals Individual growth pattern and variability in Serranus scriba: a Bayesian analysis

2009 ◽  
Vol 67 (3) ◽  
pp. 502-512 ◽  
Author(s):  
Josep Alós ◽  
Miquel Palmer ◽  
Salvador Balle ◽  
Antoni Maria Grau ◽  
Beatriz Morales-Nin
Keyword(s):  
Growth Rate ◽  
Bayesian Analysis ◽  
Growth Pattern ◽  
Growth Curves ◽  
Individual Variability ◽  
Growth Patterns ◽  
Individual Growth ◽  
Individual Level ◽  
Population Dynamics Models ◽  
Dynamics Models

Abstract Alós, J., Palmer, M., Balle, S., Grau, A. M., and Morales-Nin, B. 2010. Individual growth pattern and variability in Serranus scriba: a Bayesian analysis. – ICES Journal of Marine Science, 67: 502–512. Variability in growth patterns at an individual level in Serranus scriba is described using a Bayesian approach for a generalized von Bertalanffy growth model that accommodates one change in growth rate at a specific point during the lifespan. The approach enables individual growth curves to be inferred, even in a species with a relatively short lifespan and no commercial value, i.e. limited sample sizes available, but potentially endangered by recreational fishing. The change in growth rate may be the result of differing allocation of energy between reproductive and somatic activities at different ages. Overall, the approach presented provides adequate input for future implementation of population dynamics models that take into account individual variability, e.g. individual-based models, even for species for which limited data are available.

The assessment of seasonal yield using some Stylosanthes guyanensis accessions in humid tropical and sub-tropical environments

1977 ◽  
Vol 17 (86) ◽  
pp. 425 ◽  
Author(s):  
LA Edye ◽  
WT Williams ◽  
RL Burt ◽  
B Grof ◽  
SL Stillman ◽  
...  
Keyword(s):  
Growth Rate ◽  
High Growth ◽  
Growth Period ◽  
Maximum Growth ◽  
Maximum Growth Rate ◽  
Growth Patterns ◽  
Seasonal Growth ◽  
Seasonally Dry ◽  
Tropical Environments ◽  
Dry Tropics

The seasonal growth patterns of some S. guyanensis accessions were compared in three humid environments at South Johnstone (extended rainfall tropics), 'Heathlands' (seasonally dry tropics) and Cooroy (humid sub-tropics). The accessions were selected mainly for their productivity in previously described small mown sward experiments over three years at each site. Previous methods of presenting seasonal growth patterns are reviewed, and a new, simpler method of presentation is defined. Growth was highly seasonal at all sites. There was no growth during July to November at 'Heathlands' and Cooroy due to moisture and temperature limitations respectively. At South Johnstone growth was continuous but depressed in August and December with limitations due to both soil moisture and temperature: the maximum growth rate was 22 times the minimum growth rate. The accessions differed markedly in their growth patterns at each site. In general, the yield differences between accessions were greater at the beginning and end of the growing season than during the peak growth period. The highest yielding accessions at each site had high growth rates spread over a long period. The yield distribution and persistence of Q8231 and 46589C seemed superior to existing cultivars in tropical and sub-tropical environments respectively

Inhibition of smolting in precocious male chinook salmon, Oncorhynchus tshawytscha

1991 ◽  
Vol 69 (7) ◽  
pp. 1848-1852 ◽  
Author(s):  
Chris J. Foote ◽  
W. C. Clarke ◽  
J. Blackburn
Keyword(s):  
Growth Rate ◽  
British Columbia ◽  
Specific Growth Rate ◽  
Body Length ◽  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Specific Growth ◽  
Early Spring ◽  
Growth Patterns ◽  
Precocious Males

The ontogeny of precocious maturation in chinook salmon from Nicola River, British Columbia, was examined in conjunction with the effects of such maturation on smoltification and growth. A high proportion (56%) of male parr matured as yearlings. The growth patterns of precocious males and nonmaturing individuals of both sexes differed significantly. Precocious males appeared to grow rapidly relative to nonmaturing individuals in the early spring, but thereafter displayed a decreasing specific growth rate. In addition, precocious individuals gained more weight per increment of body length than nonmaturing individuals. The seawater adaptability of precocious individuals was lower than that of nonmaturing individuals at the three monthly sampling periods and decreased steadily as maturation proceeded.

scholarly journals The Development of a Program for the Genetic Improvement of Douglas-fir in British Columbia

1969 ◽  
Vol 45 (6) ◽  
pp. 395-399 ◽  
Author(s):  
A. L. Orr-Ewing
Keyword(s):  
British Columbia ◽  
Seed Production ◽  
Genetic Improvement ◽  
Service Industry ◽  
Douglas Fir ◽  
Important Species ◽  
Seed Orchards ◽  
Seed Sources ◽  
Interim Measure ◽  
Production Areas

The Douglas-fir, one of the most important species in western North America, has been widely planted in coastal British Columbia since 1930. The present measures being taken by the British Columbia Forest Service, Industry and the University of British Columbia to improve the genetic quality of the large amounts of seed required, are discussed. These include seed production areas, selections of plus trees in clone banks and seed orchards, together with the research programs being undertaken by all three organizations. It is noted that at the present time more than 90 per cent of the Douglas-fir seed is collected from unimproved stands. It is considered that the acreage of the seed production areas and the planned expansion of seed orchards will not be sufficient to ensure that future collections will be from improved seed sources. An immediate expansion of seed production areas is suggested as an interim measure. It is considered that there is great potential for the genetic improvement of Douglas-fir as it has already been demonstrated that the species is adaptable to radically different methods of breeding.

Neighbour and environmental influences on the growth patterns of two temperate Haliclonid sponges

2008 ◽  
Vol 59 (4) ◽  
pp. 304 ◽  
Author(s):  
D. A. Abdo ◽  
J. I. McDonald ◽  
E. S. Harvey ◽  
J. Fromont ◽  
G. A. Kendrick
Keyword(s):  
Environmental Conditions ◽  
Growth Pattern ◽  
Growth Dynamics ◽  
Growth Patterns ◽  
Sponge Species ◽  
Bioactive Metabolites ◽  
Seasonal Growth ◽  
Adverse Environmental Conditions ◽  
Potential Exploitation ◽  
Important Habitat

Understanding the growth dynamics of an organism is central to understanding its ecology and biology. Sponges often dominate many subtidal habitats, however, determining their growth dynamics is often difficult owing to the plastic and amorphous morphologies that occur in many species. Two sympatric Haliclonid sponge species were examined using a novel photogrammetric technique to understand how environmental and competitive influences affect their growth. Sponges of both species were tagged and monitored over a 14-month period. Haliclona sp. 1 (green Haliclona) showed little variation in growth compared with Haliclona sp. 2 (brown Haliclona), which had a significant seasonal growth pattern. Both green and brown Haliclona grew a significant amount over the period of study (green Haliclona: 3.4% month–1; brown Haliclona: 6.0% month–1 (with neighbours) and 4.1% month–1 (without neighbours)). In both species, growth was not significantly influenced by competition from neighbours; rather, neighbouring organisms appeared to provide protection from adverse environmental conditions. The growth dynamics of both species have important implications for the maintenance of both species populations, particularly given the important habitat they provide for other organisms, and their potential exploitation for the supply of bioactive metabolites.

Sexual seasonal growth of the European anchovy (Engraulis encrasicolus) caught by mid-water trawl and purse seine in the southern Black Sea

2012 ◽  
Vol 93 (2) ◽  
pp. 333-339 ◽  
Author(s):  
Sabri Bilgin ◽  
Burak Taşçi ◽  
Hatice Bal
Keyword(s):  
Growth Rate ◽  
Black Sea ◽  
Growth Pattern ◽  
Growth Parameters ◽  
Purse Seine ◽  
Von Bertalanffy ◽  
Seasonal Growth ◽  
European Anchovy ◽  
Engraulis Encrasicolus ◽  
Males And Females

The seasonal growth pattern and size composition of the European anchovy, Engraulis encrasicolus caught by mid-water trawl and purse seine was studied in the southern Black Sea between October 2010 and April 2011. Total length (TL) and size distribution of females caught by purse seine was higher than males and females obtained from mid-water trawl (P < 0.05). The seasonal von Bertalanffy growth parameters, computed from monthly length–frequency distributions, were estimated as asymptotic length to which the fish grow (L∞) = 13.01 cm TL, growth-rate parameter (K) = 0.993 year−1, amplitude of the sinusoidal growth oscillations (C) = 0.800, and the time of the year when the growth rate is slowest, the winter period (WP) = 0.298 for males and as L∞ = 13.69 cm TL, K = 1.249 year−1, C = 0.950, and WP = 0.151 for females caught by mid-water trawl. The seasonal von Bertalanffy growth parameters for anchovy obtained from purse seine fishing in the Rize region were estimated as L∞ = 14.00 cm TL, K = 0.800 year−1, C = 0.980, and WP = 0.212 for males and as L∞ = 13.93 cm TL, K = 0.994 year−1, C = 0.725, and WP = 0.319 for females. The period of slowest growth for males and females estimated between February and April, which is the period with a relatively low water temperature and consequently anchovy in the southern Black Sea have a seasonal growth pattern.

Regional and ecological patterns in interior Douglas-fir climate–growth relationships in British Columbia, Canada

2010 ◽  
Vol 40 (2) ◽  
pp. 308-321 ◽  
Author(s):  
Hardy P. Griesbauer ◽  
D. Scott Green
Keyword(s):  
Climate Change ◽  
British Columbia ◽  
High Elevation ◽  
Climatic Conditions ◽  
Douglas Fir ◽  
Growth Patterns ◽  
Growth Responses ◽  
Study Region ◽  
Tree Ring Data ◽  
Dry Climates

How climate change will affect tree growth across species’ geographic and climatic ranges remains a critical knowledge gap. Tree-ring data were analyzed from 33 interior Douglas-fir ( Pseudotsuga menziesii var. glauca (Beissn.) Franco) stands spanning wide geographic and climatic conditions in the interior of British Columbia to gain insights into how within-species growth responses to climate can vary based on local environmental conditions over a broad climatic and geographic range, including populations growing at the species’ range and climatic margins. Populations growing in relatively warm and dry climates had growth patterns correlated mostly with annual precipitation, whereas populations growing in high-elevation wet and cold climates had growth patterns correlated with snowfall, winter and annual temperatures, and ocean–atmosphere climate systems. Populations growing at climatic extremes (e.g., coldest, driest, warmest) in each study region had the strongest responses to climate. Projected climate change may negatively influence Douglas-fir productivity across most of its range, and populations growing near the species’ climatic limits may provide early and strong indications of future responses.

scholarly journals Development of Height-Age Models for Estimating Juvenile Height of Coastal Douglas-Fir in British Columbia

2003 ◽  
Vol 18 (3) ◽  
pp. 207-212 ◽  
Author(s):  
Gordon D. Nigh ◽  
Matthew G.E. Mitchell
Keyword(s):  
British Columbia ◽  
Nonlinear Least Squares ◽  
Site Index ◽  
Height Growth ◽  
Douglas Fir ◽  
Growth Patterns ◽  
Least Squares Regression ◽  
Data Set ◽  
Constant Variance ◽  
Power Models

Abstract Douglas-fir (Pseudotsuga menziesii var. menzeisii) is an important and abundant tree species in coastal British Columbia. Juvenile height estimates are important for management prescriptions and decisions involving regenerating stands. We used 100 plots to investigate the juvenile height growth of coastal Douglas-fir. The growth patterns of the sample trees were observed by felling and splitting them longitudinally and measuring the height of the annual nodes from the point of germination. Sixty-four plots were used to develop a height model as a function of total age and site index. The Chapman-Richards, Gompertz, and modified exponential and power models were fit using nonlinear least squares regression. The models were tested with the remaining 36 plots. The modified exponential and power equation was the best fitting of the three models. None of the models met the regression assumption of independently normally distributed residuals with a mean of zero and a constant variance. The modified exponential and power model was further analyzed using the complete data set by fitting height growth and incorporating a model for serial correlation in the error term to improve the statistical properties of the model. West. J. Appl. For. 18(3):207–212.

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