Results 151 to 160 of about 10,635 (194)

Análisis de anillos de crecimiento sobre imágenes digitales usando SIG libre [PDF]

open access: yes, 2013
Arenas Castro, Salvador   +2 more
core  

Altitudinal Gradient May Shadow the Effects of Altitudinal Range on Species Diversity

Applied Mechanics and Materials, 2014
Altitudinal range is widely used as a proxy of habitat heterogeneity to explain broad-scale geographical patterns of species diversity. Though altitudinal range is a factors derived from altitudinal gradient, altitudinal range’s effects on species diversity on altitudinal gradient remain little known.
Miao Li, Jian Meng Feng
openaire   +1 more source

Altitudinal Gradients of Soil Temperatures in Europe

Transactions of the Institute of British Geographers, 1980
The altitudinal gradient of soil temperature is examined with the aid of observations from ten countries in Europe. It is shown that this altitudinal gradient is always greatest in summer and least in winter, and that only the amplitude of the seasonal variation differs from one region to another.
F. H. W. Green, R. J. Harding
openaire   +1 more source

Leaf wettability decreases along an extreme altitudinal gradient

Oecologia, 2009
The duration and amount of water captured on leaves and its functional significance is highly varied. Leaf surface wettability influences water absorption, gas exchange, pathogen infection, nutrient leaching, contamination by pollutants, self-cleaning properties and in freezing environments the probability of extrinsic ice nucleation.
Biva, Aryal, Gilbert, Neuner
openaire   +2 more sources

The Altitudinal Gradients of Air Temperature in Southern Norway

Geografiska Annaler: Series A, Physical Geography, 1980
ABSTRACT. Following from an earlier paper on the altitudinal gradients of temperature in the British Isles (Harding, 1978) a statistical study is made of the more extensive network of upland observations from southern Norway. The effects of altitude are found to be similar in the two regions: the mean values of the altitudinal gradients are the same ...
F. H. W. Green, R. J. Harding
openaire   +1 more source

Change of Leaf Morphology along Altitudinal Gradients

Advanced Materials Research, 2013
It is the most effective way to study the effect of global warming on plant morphology by analyzing a plant species on a mount along altitudinal gradients. Altitudinal increase means decrease of temperature and metabolic rate as well. This might affect the leaf morphology greatly. The SEM study reveals that the size of nanopore on the epidermis changes
Hai Yan Kong   +3 more
openaire   +1 more source

Leaf breakdown along an altitudinal stream gradient

Fundamental and Applied Limnology, 1998
Breakdown of alder (Alnus glutinosa) leaf litter was followed in fourteen sampling stations along a 1400 m altitudinal gradient of a 1st to 3rd-order undisturbed stream. Altitudinal patterns of leaf mass loss, nitrogen concentration in the leaves, fungal biomass determined as ergosterol content, and numbers and biomass of shredders and total ...
Fabre, Eric, Chauvet, Eric
openaire   +2 more sources

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