scholarly journals Ray Tracheid Structure in Second Growth Sequoia washingtoniana

1919 ◽  
Vol 68 (6) ◽  
pp. 467-473 ◽  
Author(s):  
H. C. Belyea
Keyword(s):  
Second Growth ◽  
Ray Tracheid

Land-use history and abiotic gradients drive abundance of non-native shrubs in Appalachian second-growth forests with histories of mining, agriculture, and logging

2021 ◽  
Vol 494 ◽  
pp. 119296
Author(s):  
Marion A. Holmes ◽  
James V. Whitacre ◽  
Leland D. Bennion ◽  
Jessica Poteet ◽  
Sara E. Kuebbing
Keyword(s):  
Land Use ◽  
Land Use History ◽  
Second Growth ◽  
Native Shrubs ◽  
Abiotic Gradients

Is second-growth rainforest good enough? Going beyond community composition

2021 ◽  
Author(s):  
Richard M. Lehtinen ◽  
Christopher W. Gumpper ◽  
Keara Weiss ◽  
Linnea L. Johnson ◽  
Nathan G. Weltman ◽  
...  
Keyword(s):  
Community Composition ◽  
Second Growth

scholarly journals The Delphi method as an alternative to standard committee meetings to identify ecological issues for forest ecosystem-based management: A case study

2016 ◽  
Vol 92 (04) ◽  
pp. 453-464 ◽  
Author(s):  
K. Waldron ◽  
J.-M Lussier ◽  
N. Thiffault ◽  
F. Bujold ◽  
J.-C. Ruel ◽  
...  
Keyword(s):  
Forest Ecosystem ◽  
Delphi Method ◽  
Boreal Forests ◽  
Expert Consultation ◽  
Committee Meeting ◽  
Eastern Canada ◽  
Face To Face ◽  
Time Investment ◽  
Second Growth ◽  
The Face

The face-to-face committee meeting is one of the most common expert consultation methods used in forest management. However, it is also laden with disadvantages, such as potential inequity in its consideration of participant opinion and the time involvement required. This led us to evaluate another expert consultation method, the Delphi method, namely by implementing it to identify ecological issues associated with second-growth boreal forests in eastern Canada. We compared this method to the committee meeting method with regard to the time investment required and the efficiency of the consultations. In all, 21 experts participated in three rounds of our implementation of the Delphi method. Subsequently, we administered an appreciation survey comparing the participants’ attitudes vis-à-vis the two methods. These comparisons showed that Delphi was less time-consuming compared to a committee meeting consultation of comparable scope. Participants also considered the Delphi method to be fair and impartial, as all opinions were considered, which is frequently not the case in committee meetings. That said, participants believed that committee meetings allowed for a greater understanding of others’ opinions. Overall, the application of the Delphi method was shown to be a promising way of determining forest ecosystem management issues.

Streamflow nitrogen loss following forest fertilization in a southern Vancouver Island watershed

1985 ◽  
Vol 15 (1) ◽  
pp. 34-41 ◽  
Author(s):  
Eugene D. Hetherington
Keyword(s):  
Water Quality ◽  
Nitrogen Loss ◽  
Vancouver Island ◽  
Soil Permeability ◽  
Creek Watershed ◽  
Second Growth ◽  
Nitrogen Concentrations ◽  
Steep Slopes ◽  
Fall Application ◽  
Small Tributary

Water quality was monitored in the Lens Creek watershed on southern Vancouver Island to determine nitrogen loss following fall application of 224 kg N/ha urea fertilizer on a second-growth Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) forest. Peak nitrogen concentrations measured in two small tributary streams were 14 mg/L as urea, 1.9 mg/L as ammonia, and 9.3 mg/L as nitrate. For the first 14 months, estimated nitrogen outputs in excess of background amounts were 5.9 and 14.5% of the total applied nitrogen for the two subsidiary watersheds with 46 and 80% of their drainage areas fertilized, respectively. These losses were considerably higher than amounts of less than 1% previously reported for western North America. Increased levels of urea N and ammonia N were short-lived, while nitrate N remained above background levels for the study duration. Reasons for the high nitrogen loss include nitrification of the urea during 7 weeks of mild, dry weather following fertilization, presence of alder and swampy areas adjacent to the streams, high soil permeability, steep slopes, and abundant, above average early winter rainfall. The watersheds had been previously fertilized, but any influence of this first fertilization on nitrogen loss during the present study is unknown. Lens Creek water quality was not adversely affected by the fertilization in terms of drinking water standards or toxicity to fish.

Development of Height-Volume Relationships in Second Growth Abies grandis for Use with Aerial LiDAR

2016 ◽  
Vol 42 (5) ◽  
pp. 400-410 ◽  
Author(s):  
Wade T. Tinkham ◽  
Alistair M. S. Smith ◽  
David L. R. Affleck ◽  
Jarred D. Saralecos ◽  
Michael J. Falkowski ◽  
...  
Keyword(s):  
Abies Grandis ◽  
Second Growth

One-Leaf Cuttings as a Model to Study Second Growth in the Potato (Solanum tuberosum) Plant

1990 ◽  
Vol 66 (3) ◽  
pp. 273-280 ◽  
Author(s):  
J. H. VAN DEN BERG ◽  
P. C. STRUICK ◽  
E. E. EWING
Keyword(s):  
Solanum Tuberosum ◽  
Second Growth

Fungal deterioration of second-growth Douglas-fir logs in coastal British Columbia

1970 ◽  
Vol 48 (9) ◽  
pp. 1541-1551 ◽  
Author(s):  
R. B. Smith ◽  
H. M. Craig ◽  
D. Chu
Keyword(s):  
Seasonal Pattern ◽  
Wood Decay ◽  
Late Summer ◽  
Douglas Fir ◽  
White Rot ◽  
Decay Fungi ◽  
Deterioration Rate ◽  
Second Growth ◽  
Autumn And Winter ◽  
Fungal Deterioration

Fungal deterioration of second-growth Douglas-fir logs, felled each month from August 1961 to May 1962, was studied 2, 4, and 6 years after felling. Decay increased from 10% of log volumes after 2 years to 47% after 6 years. The rate of decay, particularly for the brown cubical type, was greater for autumn- and winter-felled logs than for those felled in the spring and late summer, and closely paralleled the seasonal pattern of ambrosia beetle attack.Decay rates increased with decreasing log size, increasing percentage of sapwood, and increasing height of log above ground. For the same diameter of log, base logs decayed less rapidly than second logs, possibly because of their lower proportion of sapwood in relation to heartwood.Decay expressed as a percentage of total log volume (Y) may be estimated (R2 = 0.71) with the following equation: Y = 13.2 + 10.7X1 − 3.2X2, where X1 = years elapsed and X2 = d.i.b. (diameter inside bark) top of log.Of 30 wood-decay fungi isolated, Naematoloma sp. (N. capnoides or N. fasciculare), which causes a white rot, was associated with the most decay. Fomes pinicola was mainly responsible for brown cubical sap rot, while Poria monticola and P. carbonica caused a brown cubical heart rot at the ends of logs.The significance of variations in deterioration rate and fungal associates is discussed in relation to log durability and salvability.

ECR Plasma Oxidation: Dependence on Energy of Argon Ion

1999 ◽  
Vol 585 ◽  
Author(s):  
S. Matsuo ◽  
M. Yamamoto ◽  
T. Sadoh ◽  
T. Tsurushima ◽  
D. W. Gao ◽  
...  
Keyword(s):  
Growth Rate ◽  
Flow Rate ◽  
Microwave Power ◽  
Electron Cyclotron Resonance ◽  
Ion Irradiation ◽  
Oxide Films ◽  
Ecr Plasma ◽  
Second Growth ◽  
Argon Ions ◽  
Argon Ion

AbstractEffects of ion-irradiation on oxidation of silicon at low temperatures (130°C) in an argon and oxygen mixed plasma excited by electron cyclotron resonance (ECR) interaction are investigated. First, dependence of energy and flux of incident ions on the flow rate and the microwave power is evaluated. It is shown that the flow rate and the microwave power are key parameters for controlling the energy and the flux of incident ions, respectively. Second, growth kinetics of the oxide films are studied. The growth rate depends on the energy and the flux of argon ions irradiated to the substrate, and the growth thickness increases proportionally to the root square of the oxidation time. Thus, the growth rate is limited by diffusion of oxidants enhanced by irradiation with argon ions. The effect of substrate bias on oxidation characteristics is also discussed. The electrical properties of the oxide films are improved by increasing the bias. The improvement is due to the reduction of damage at the surface of the substrate induced by the irradiation.

Effect of irrigation frequency on the incidence of second growth of Russet Burbank potatoes in north-west Tasmania

1988 ◽  
Vol 111 (2) ◽  
pp. 399-402 ◽  
Author(s):  
B. Chung ◽  
D. Armstrong ◽  
Sue Grice
Keyword(s):  
Water Stress ◽  
Potato Cultivar ◽  
High Temperature Stress ◽  
Russet Burbank ◽  
French Fries ◽  
Irrigation Frequency ◽  
North West ◽  
Second Growth ◽  
Tuber Bulking ◽  
High And Low Temperatures

In recent years, processors in Tasmania have introduced Russet Burbank as the most desirable potato cultivar for processing into French fries. Malformed tubers, collectively known as second growth, have been observed in some commercial Russet Burbank crops with the main defect being knobby tubers. Second growth of potato tubers has been shown to occur when the plant suffers a period of stress during the growth of the tubers such as drought, high and low temperatures, restricted soil aeration, interference with water and carbohydrate translocation and fertility imbalance (Sparks, 1958; Bodlaender, Lugt & Marinus, 1964; Iritani, 1981; Holder & Cary, 1984) or a combination of both drought and high temperature stress (Ohms, 1968). If stress from these factors is relieved, the renewed growth of the tuber is often confined to the eyes, producing knobby tubers (Moorby, 1978). Moderate water stress during early tuber bulking can lead to pear-shaped tubers (pointed at the basal end) whilst water stress during the latter part of the season can lead to tubers pointed at the apical end (Iritani, 1981). Knobby tubers are undesirable because knobs are easily broken off leading to yield loss and the exposure of tissue to infection. Severely pointed tubers cannot be processed efficiently into French fries.

Sign in / Sign up

Export Citation Format

Share Document