Changes in labile soil organic carbon fractions in wetland ecosystems along a latitudinal gradient in Northeast China
Topsoil (0–20 cm) was collected from 5 wetlands along a latitudinal gradient in Northeast China. The AA. analyzed soil organic carbon (SOC) and some labile fractions. Their results demonstrated that wetland SOC and its labile fractions concentration
The slow movement of the soil depends on local factors (slope angle, moisture of the soil, vegetation cover) and on the latitudinal and altitudinal climatic zonal factors (temperature, precipitation). The rate of soil movement in the polar
of forest environments, 3) the changes in the latitudinal and altitudinal zonation of forests, 4) the repercussions of possible diseases and pests on the vitality of forests, and 5) changes in the function of forests in Central European landscapes.
and of water-heat conditions in the region cause obvious regional differentiations of the landscape. from south to the north, the types of landforms, degree of dissection, vegetation cover-degree and intensity of soil and water loesses show clearly latitudinal
Analyse de la composition et de la structure de cette flore en Russie d'Europe et dans les régions voisines. On met en évidence un gradient latitudinal pour les espèces naturalisées lié en première approche à un gradient de facteurs abiotiques
the relative importance of significant snowfalls (those producing snowfall amounts of 10 cm or more); identifying temporal and/or latitudinal variations in the frequency of significant snowstorms.
from 1854 to 1916 and low flows from 1917 to 1950. These asynchronous events may be due to variation in the latitude of the subtropical high and in the latitudinal found with El Niño-Southern Oscillation.
has a gradual increasing trend in which the precipitation plays a very important role. Abrupt change is an important characteristic in eastern Henan where this sudden change type has notable latitudinal difference.
. Un modèle est proposé pour analyser le comportement longitudinal et latitudinal des centres moyens par rapport au déplacement des trajectoires d'orages et les ajustements résultant des conditions d'humidité du combustible.
, palaeontological and archaeological context at the same period. However the data show no qualitative latitudinal change in vegetation during the last 40,000 years.
passerait sur l'Arctique, le gradient thermique latitudinal et la continentalité ne jouent qu'un rôle infime. Les résultats peuvent être intégrés dans des modèles paléoclimatiques simples. (JPB).
The AA. examine parameters of Regional Growth Curves (RGGs) along a latitudinal transect in Siberia, and argue that they can be linked to temperature on century scales. The AA. test this interpretation by a similar analysis of RGC parameters along
Contrasting short-term performance of mountain birch (Betula pubescens ssp. czerepanovii) treeline along a latitudinal continentality-maritimity gradient in the southern Swedish Scandes
sea level. The measures of impact are geographical (longitudinal, latitudinal, and hypsometric) gradients. Similar gradients have already been calculated for Poland. For calculation of equations of regression and geographical gradients of air
. There are distinguished five sub-latitudinal zones and one meridional (the Urals) belt which differ according to the presence or the absence of the upper-range of the river bed-forming discharge which corresponds to the submerged flood-plain. For each region and district
atmosphere and sea surface by using a reconstruction of the latitudinal C14 gradient which existed in the Southern Ocean prior to 1962. The corrected AMS-C14 data show a reduced sedimentation rates in core MD 84-527 between 25,000 and 10,000 yr B.P. For core