Scale-dependent effects of post-fire canopy cover on snowpack depth in montane coniferous forests

2017 ◽  
Vol 27 (6) ◽  
pp. 1888-1900 ◽  
Author(s):  
Jens T. Stevens

2001 ◽  
Vol 79 (4) ◽  
pp. 500-509 ◽  
Author(s):  
Dawn C Loewen ◽  
Geraldine A Allen ◽  
Joseph A Antos

Habitat requirements of the yellow glacier lily, Erythronium grandiflorum Pursh, were studied at 38 sites in southern British Columbia and southwestern Alberta. At each site we recorded densities of E. grandiflorum growth stages from seedling to flowering, environmental characteristics of the site, and percent cover of associated plant species. We carried out detrended correspondence analysis (DCA) of the sites based on cover of associated species, and examined rank correlations between site environmental variables and site ordination scores. Variation among sites was related primarily to elevation and the presence of deciduous vs. coniferous trees. All growth stages of E. grandiflorum were less abundant in coniferous forests than in open areas or sites with deciduous trees, suggesting that evergreen canopies restrict the species on many sites where it could otherwise grow. Although E. grandiflorum populations were most commonly found in subalpine meadows, they flowered more abundantly in low-elevation populations. Recruitment was frequent, with seedlings occurring at many sites; we also showed that detached bulb segments can give rise to new ramets. The present widespread distribution of E. grandiflorum may derive from a post-glacial period with extensive meadow habitat that was favourable for rapid spread.Key words: canopy cover, elevation, yellow glacier lily, post-glacial migration, subalpine meadows.



Ecology ◽  
1969 ◽  
Vol 50 (2) ◽  
pp. 255-263 ◽  
Author(s):  
R. C. Anderson ◽  
O. L. Loucks ◽  
A. M. Swain


2001 ◽  
Vol 106 (D6) ◽  
pp. 5151-5160 ◽  
Author(s):  
David B. Lobell ◽  
Gregory P. Asner ◽  
Beverly E. Law ◽  
Robert N. Treuhaft


2013 ◽  
Vol 289 ◽  
pp. 371-377 ◽  
Author(s):  
Hosein Khoroshi Eisalou ◽  
Kamil Şengönül ◽  
Ferhat Gökbulak ◽  
Yusuf Serengil ◽  
Betül Uygur


1981 ◽  
Vol 11 (4) ◽  
pp. 854-857 ◽  
Author(s):  
Alton S. Harestad ◽  
Fred L. Bunnell

Less snow accumulates under forest canopies than in small openings. Analysis of relationships between canopy cover and snow-water equivalents (SWE) for coniferous forests indicate substantial differences between areas and years. Many of these differences result from differences in the total amount of snowfall. The difference between SWE values in open and forested areas increases with increasing SWE in the open. However, the relative influence of canopy cover on maximum SWE decreases with increasing SWE in open areas. By incorporating this latter relationship, canopy cover can be used to predict snow-water equivalents in coniferous forests.



2020 ◽  
Vol 649 ◽  
pp. 125-140
Author(s):  
DS Goldsworthy ◽  
BJ Saunders ◽  
JRC Parker ◽  
ES Harvey

Bioregional categorisation of the Australian marine environment is essential to conserve and manage entire ecosystems, including the biota and associated habitats. It is important that these regions are optimally positioned to effectively plan for the protection of distinct assemblages. Recent climatic variation and changes to the marine environment in Southwest Australia (SWA) have resulted in shifts in species ranges and changes to the composition of marine assemblages. The goal of this study was to determine if the current bioregionalisation of SWA accurately represents the present distribution of shallow-water reef fishes across 2000 km of its subtropical and temperate coastline. Data was collected in 2015 using diver-operated underwater stereo-video surveys from 7 regions between Port Gregory (north of Geraldton) to the east of Esperance. This study indicated that (1) the shallow-water reef fish of SWA formed 4 distinct assemblages along the coast: one Midwestern, one Central and 2 Southern Assemblages; (2) differences between these fish assemblages were primarily driven by sea surface temperature, Ecklonia radiata cover, non-E. radiata (canopy) cover, understorey algae cover, reef type and reef height; and (3) each of the 4 assemblages were characterised by a high number of short-range Australian and Western Australian endemic species. The findings from this study suggest that 4, rather than the existing 3 bioregions would more effectively capture the shallow-water reef fish assemblage patterns, with boundaries having shifted southwards likely associated with ocean warming.



2018 ◽  
Vol 30 (1) ◽  
pp. 173-193 ◽  
Author(s):  
Yeongjun Cho ◽  
Hasong Kim ◽  
Hyeonho Myeong ◽  
Jungwon Park ◽  
Janggeun Oh


Author(s):  
Alicia L. Reiner ◽  
Carol M. Ewell ◽  
Josephine A. Fites-Kaufman ◽  
Scott N. Dailey ◽  
Erin K. Noonan-Wright ◽  
...  


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