scholarly journals Liberation of nitrogen from alder leaf litter

1958 ◽  
Vol 67 (1) ◽  
Author(s):  
Peitsa Mikola

2021 ◽  
Vol 84 (1) ◽  
Author(s):  
Verónica Ferreira ◽  
João Silva ◽  
Julien Cornut ◽  
Manuel A. S. Graça




Author(s):  
R. Lynn Taylor ◽  
Paul W. Adams


2013 ◽  
Vol 43 (4) ◽  
pp. 321-330 ◽  
Author(s):  
M.B. Dickinson ◽  
E.A. Johnson ◽  
R. Artiaga

Although fuel characteristics are assumed to have an important impact on fire regimes through their effects on extinction dynamics, limited capabilities exist for predicting whether a fire will spread in mixedwood boreal forest surface fuels. To improve predictive capabilities, we conducted 347 no-wind, laboratory test burns in surface fuels collected from the mixedwood boreal forest of Saskatchewan. The beds were composed of single fuel types of contrasting characteristics, including feather moss, aspen leaf litter, aspen and alder leaf litter, and twigs. Shredded wood (i.e., excelsior) was included for comparison. An extinction index and logistic model from the literature that balances heat sources and sinks performed well for excelsior, a fuel used to develop the model, but poorly for forest fuels. As a result, we used logistic regression to develop a model for forest fuels finding that fire spread was largely determined by the heat sink, heat of combustion, and fuel bed depth. We found close correspondence between our model and fire spread in an independent sample of beds composed of mixtures of mixedwood fuels (N = 59). Our model can serve as a means of analyzing the relative importance of fuels and weather on extinction dynamics during mixedwood boreal forest fires.



Author(s):  
Jean-Philippe David ◽  
Delphine Rey ◽  
Andr� Cuany ◽  
Marcel Amichot ◽  
Jean-Claude Meyran




2013 ◽  
Vol 12 (11) ◽  
pp. 2107-2116 ◽  
Author(s):  
Marija Tamkeviciute ◽  
Jolita Dudaite ◽  
Edita Baltrenaite ◽  
Xavier Ubeda


2020 ◽  
Vol 29 (2) ◽  
pp. 278-283
Author(s):  
S.G. Ermilov

The oribatid mite subgenus Scheloribates (Topobates) Grandjean, 1958, is recorded from the Neotropical region for the first time. A new species of this subgenus is described from the leaf litter collected in Cayo Agua Island, Panama. Scheloribates (Topobates) panamaensis sp. nov. differs from its related species by the very large body size and presence of a strong ventrodistal process on the leg femora II–IV.



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