Now showing items 1-10 of 386
Microbial Cycling of C and N in Northern Hardwood Forests Receiving Chronic Atmospheric NO 3 − Deposition
(Springer-Verlag; Springer Science+Business Media, Inc., 2006-03)
Sugar maple ( Acer saccharum Marsh.)-dominated northern hardwood forests in the upper Lakes States region appear to be particularly sensitive to chronic atmospheric NO 3 − deposition. Experimental NO 3 − deposition (3 g ...
Does schooling reduce fast-start response latencies in teleosts?
(Elsevier, 1980)
1. 1. Response latencies, denned as the time between a d.c. electric shock and initiation of a fast-start (startle response) were measured for eight species of teleosts.2. 2. Fast-start response latencies varied from 10 ...
Yunia dichotoma, a lower devonian plant from Yunnan, China
(Elsevier, 1991-07-10)
This paper describes a new genus and species, Yunia dichotoma, collected from the Posonchong Formation of Siegenian age in the Wenshan district of Yunnan, China. The spiny axes are characterized by cruciate dichotomy. ...
Thermal adjustments in cardiac and skeletal muscles of lizards
(Springer-Verlag, 1969-03)
1. Isometric twitch tension development was measured over a wide range of temperatures in skeletal and cardiac (ventricular) muscles from diverse Australian lizards representing several families and including both diurnal ...
Length variation of CAG repeats in Sry across populations of Mus domesticus
(Springer-Verlag, 1995-03)
Congruent Avian Phylogenies Inferred from Mitochondrial and Nuclear DNA Sequences
(Springer-Verlag; Springer-Verlag New York Inc., 2003-07)
Recent molecular studies addressing the phylogenetic relationships of avian orders have had conflicting results. While studies using nuclear DNA sequences tend to support traditional taxonomic views, also supported by ...
Association of influenza epidemics with global climate variability
(Kluwer Academic Publishers; Springer Science+Business Media, 2004-11)
The reasons for the seasonality and annual changes in the impact of influenza epidemics remain poorly understood. We investigated the covariations between a major component of climate, namely the El Niño Southern Oscillation ...
Root turnover and productivity of coniferous forests
(Martinus Nijhoff/Dr. W. Junk Publishers; Martinus Nijhoff/Dr W. Junk Publishers ; Springer Science+Business Media, 1983-02)
Fine roots and mycorrhizae have recently been shown to produce a major portion of the organic matter entering decomposition. Roots and mycorrhizae constitute 63 to 70% of total net primary production in Douglas-fir and ...
Choosing category size in a stage projection matrix
(Springer-Verlag, 1978-01)
A basic problem associated with choosing category size in a stage projection matrix is described. “Errors of estimation” are large if the category size is chosen too small and “errors of distribution” are large if the ...