Fire frequency effects in a grassy woodland: Trees and grasses

2020 ◽  
Vol 45 (3) ◽  
pp. 384-398
Author(s):  
E. Charles Morris ◽  
Penny J. Watson
Keyword(s):  
Fire Frequency ◽  
Frequency Effects

scholarly journals Fire frequency effects on soil and pollinators: what shapes sexual plant reproduction?

Plant Ecology ◽  
2017 ◽  
Vol 218 (11-12) ◽  
pp. 1283-1297 ◽  
Author(s):  
Lucas M. Carbone ◽  
Ramiro Aguilar
Keyword(s):  
Plant Reproduction ◽  
Fire Frequency ◽  
Frequency Effects

scholarly journals Influence of fire frequency on Colophospermum mopane and Combretum apiculatum woodland structure and composition in northern Gonarezhou National Park, Zimbabwe

Koedoe ◽  
2009 ◽  
Vol 51 (1) ◽  
Author(s):  
Edson Gandiwa ◽  
Shakkie Kativu
Keyword(s):  
Plant Height ◽  
Woody Plants ◽  
National Park ◽  
Fire Management ◽  
Fire Frequency ◽  
Annual Rainfall ◽  
Frequency Effects ◽  
In Fire ◽  
Mopane Woodland ◽  
Combretum Apiculatum

We investigated the long-term effects of fire frequency on Colophospermum mopane and Combretum apiculatum woodland structure and composition in northern Gonarezhou National Park (GNP), Zimbabwe. Fire frequency was categorised as high (every 1–2 years), medium (every 3–4 years) and low (every 5–6 years). The following variables were measured or recorded: plant height, species name, canopy depth and diameter, basal circumference, number of stems per plant, plant status (dead or alive) and number of woody plants in a plot. There was a positive correlation (r = 0.55, P = 0.0007) between annual area burnt (total from January to December) and annual rainfall (average over two rain stations per rain year, July to June) between 1972 and 2005. A total of 64 woody species were recorded from C. mopane and C. apiculatum woodlands. Mean plant height increased from 4.5 to 8.2 meters in C. mopane woodland and from 4.5 to 5.1 meters in C. apiculatum woodland in areas subjected to high and low fire frequencies. In C. mopane woodland, low fire frequency was characterised by a significantly low density of woody plants (P < 0.001), however, with a significantly high mean basal area (P < 0.001). Fire frequency had no significant effect on species diversity (P > 0.05). Our results suggest that C. mopane and C. apiculatum woodlands are in a state of structural transformation. Fire frequency effects, however, appear to be woodland specific. Fire management strategies in GNP should take into consideration annual rainfall and the different vegetation types.Conservation implication: This study provides valuable information on fire frequency effects on woody vegetation in northern GNP, which can be used in fire management programmes for the park. The positive relationship between annual rainfall and annual area burnt emphasises the need for wildlife managers to consider annual rainfall in fire management.

scholarly journals Fire frequency effects on fuel loadings in pine-oak forests of the Madrean Province

2001 ◽  
Author(s):  
Francisco J. Escobedo ◽  
Peter F. Ffolliott ◽  
Gerald J. Gottfried ◽  
Florentino Garza
Keyword(s):  
Fire Frequency ◽  
Oak Forests ◽  
Frequency Effects

Fire-frequency effects on vegetation in north Florida pinelands: Another look at the long-term Stoddard Fire Research Plots at Tall Timbers Research Station

2012 ◽  
Vol 264 ◽  
pp. 197-209 ◽  
Author(s):  
Jeff S. Glitzenstein ◽  
Donna R. Streng ◽  
Ronald E. Masters ◽  
Kevin M. Robertson ◽  
Sharon M. Hermann
Keyword(s):  
Fire Frequency ◽  
Fire Research ◽  
Research Station ◽  
Frequency Effects

Real Ear Sound Pressure Levels Developed by Three Portable Stereo System Earphones

1992 ◽  
Vol 1 (4) ◽  
pp. 52-55 ◽  
Author(s):  
Gail L. MacLean ◽  
Andrew Stuart ◽  
Robert Stenstrom
Keyword(s):  
High Frequency ◽  
Sound Pressure ◽  
Low Frequency ◽  
Test System ◽  
Output Frequency ◽  
Frequency Effects ◽  
Adult Men ◽  
Frequency Responses ◽  
Significant Difference ◽  
Sound Pressure Levels

Differences in real ear sound pressure levels (SPLs) with three portable stereo system (PSS) earphones (supraaural [Sony Model MDR-44], semiaural [Sony Model MDR-A15L], and insert [Sony Model MDR-E225]) were investigated. Twelve adult men served as subjects. Frequency response, high frequency average (HFA) output, peak output, peak output frequency, and overall RMS output for each PSS earphone were obtained with a probe tube microphone system (Fonix 6500 Hearing Aid Test System). Results indicated a significant difference in mean RMS outputs with nonsignificant differences in mean HFA outputs, peak outputs, and peak output frequencies among PSS earphones. Differences in mean overall RMS outputs were attributed to differences in low-frequency effects that were observed among the frequency responses of the three PSS earphones. It is suggested that one cannot assume equivalent real ear SPLs, with equivalent inputs, among different styles of PSS earphones.

Experience Matters

2020 ◽  
Vol 228 (4) ◽  
pp. 254-263 ◽  
Author(s):  
Pedro S. Mendes ◽  
Karlos Luna ◽  
Pedro B. Albuquerque
Keyword(s):  
Word Frequency ◽  
High Frequency ◽  
Recall Test ◽  
Judgments Of Learning ◽  
Direct Experience ◽  
Frequency Effects ◽  
Actual Frequency ◽  
Actual Word ◽  
High Frequency Words

Abstract. The present study tested if word frequency effects on judgments of learning (JOLs) are exclusively due to beliefs or if the direct experience with the items also plays a role. Across four experiments, participants read prompts about the frequency of the words (high/low), which could be congruent/incongruent with the words’ actual frequency. They made pre-study JOLs (except Experiment 1b), immediate JOLs, and completed a recall test. If experience drives the effect, JOLs should be based on actual word frequency rather than the prompts. Results showed higher pre-study JOLs for prompts of high frequency, but higher immediate JOLs for high-frequency words regardless of the prompt, suggesting an effect of direct experience with the words. In Experiments 2 and 3, we manipulated participants’ beliefs, finding a small effect of beliefs on JOLs. We conclude that, regarding word frequency, direct experience with the items seems more relevant than beliefs when making immediate JOLs.

Word frequency effects and masked repetition priming: An ERP study

2009 ◽  
Author(s):  
Marianna D. Eddy ◽  
Jonathan Grainger ◽  
Danielle Lopez ◽  
Phillip J. Holcomb
Keyword(s):  
Word Frequency ◽  
Repetition Priming ◽  
Frequency Effects ◽  
Masked Repetition
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