Examining smoke water as a potential germination-enhancing technique to aid the recovery of the endangered Franciscan manzanita (Arctostaphylos franciscana Eastw. [Ericaceae])

2013 ◽  
Vol 14 (1) ◽  
pp. 49-54
Author(s):  
M. J. Laskowski ◽  
C. C. Dicksion ◽  
B. Schaefer ◽  
B. Young
Keyword(s):  
2016 ◽  
Vol 17 (1) ◽  
pp. 19-27 ◽  
Author(s):  
S. Krock ◽  
S. Smith ◽  
C. Elliott ◽  
A. Kennedy ◽  
S. T. Hamman
Keyword(s):  

1987 ◽  
Vol 119 (12) ◽  
pp. 1109-1115
Author(s):  
W.P.L. Osborn ◽  
J.H. Borden

AbstractTo mitigate the effects of mosquitoes, settlers in the Revelstoke area of British Columbia reportedly burned the sporophores of the Indian paint fungus, Echinodontium tinctorium (Ell. & Ev.) Ell. & Ev., a pathogen of western hemlock, Tsuga heterophylla (Raf.) Sarg., and true firs, Abies spp. Larval and adult yellowfever mosquitoes, Aedes aegypti (L.), were exposed to aqueous extracts of smoke (smoke-waters) from E. tinctorium sporophores, and from western hemlock sapwood and heartwood. Smoke-waters were of approximately equal toxicity to larvae. Fungus smoke-water, but not sapwood or heartwood smoke-waters, lost 50% of its potency in 5 months. Vapors from fungus smoke-water were significantly more toxic to adult mosquitoes than those from sapwood or heartwood. Thus smoke from E. tinctorium sporophores and T. heterophylla wood apparently contain different water-soluble combustion products toxic to A. aegypti.


2006 ◽  
Vol 54 (6) ◽  
pp. 571 ◽  
Author(s):  
Melanie A. Norman ◽  
Julie A. Plummer ◽  
John M. Koch ◽  
Greg R. Mullins

Alcoa is undertaking rehabilitation in the jarrah (Eucalyptus marginata D.Don ex Sm.) forest of Western Australia, following bauxite mining. One of the methods used in the rehabilitation program is broadcasting seeds; however, about two-thirds of species require seed-dormancy-breaking treatments. Smoke overcomes dormancy and enhances the germination of many jarrah forest species. Smoke-application methods were investigated to find the best seed treatment for 64 jarrah forest species. The optimum duration of seed imbibition in aqueous smoke and dilution of the aqueous smoke product were also investigated. The method of smoke application was important. Smoke water enhanced the germination of 12% of species, whereas aerosol smoke enhanced the germination of 6% of species. Both Grevillea pilulifera (Lindl.) Druce and Velleia trinervis Labill. had germination enhanced by both smoke-application methods. Aerosol smoke inhibited the germination of Clematis pubescens Endl. and Hypocalymma angustifolium (Endl.) Schauer. A total of 78% of species did not exhibit significantly enhanced germination when smoke treated, including the two species inhibited by smoke treatment. Germination was equivalent following 1- and 12-h imbibition in the aqueous smoke extract. Dilutions of the aqueous extract Regen 2000 Smokemaster from 1 to 3% were optimal for the germination of Marianthus bicolor (Putt.) F.Muell and Stylidium amoenum R.Br., even after subsequent washing with water, demonstrating the irreversible nature of smoke treatments. For species that did not exhibit smoke-enhanced germination, other dormancy-breaking treatments may be required before a response to smoke is elicited. These results have application to a wide variety of natural managed lands, disturbed and designed landscapes.


Data in Brief ◽  
2018 ◽  
Vol 21 ◽  
pp. 343-350 ◽  
Author(s):  
Gaurav S. Dave ◽  
Bhemji Galvadiya ◽  
Himanshu Bariya ◽  
Sudhanshu R. Vyas

Author(s):  
Jon Bryan Burley

Landscape aesthetics and environmental quality have both become central investigatory areas in transportation planning and design. Environmental designers are interested in applying research-based models to study the effects of specific transportation design treatments on the built and natural landscape. The development of a perception-based visual quality predictive equation is investigated for application in both naturalistic and designed landscapes for transportation planning and design projects. The prediction model contained total area of noospheric features and total area of motorized vehicles; presence of humans, wildlife, utility structures, and foreground flowers; total area of distant nonvegetation landscape features such as mountains and buttes; perimeter of intermediate nonvegetation; total area of foreground vegetation; and openness, mystery, and environmental quality indexes (p < 0.0001 for the overall regression, p ≤ 0.05 for each regressor using Type II sums of squares, and multiple. R-square of 0.67). Other variables such as motorized boats, nonflowering foreground herbaceous plants, a greenness index, fire, total area of exposed foreground substrate, smoke, water, smoothness, and the Shafer index were not significant regressors. By using a graph plotting the 95 percent confidence limits for the equation, an investigator can predict the statistical differences between a pair of images at a 90 percent confidence level.


2010 ◽  
Vol 30 (6) ◽  
pp. 596-602 ◽  
Author(s):  
Cécile Trinh ◽  
Lieven Gevaert ◽  
Ladislav Kohout ◽  
Johannes Van Staden ◽  
Luc Verschaeve
Keyword(s):  

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