Effects of wet meadow riparian vegetation on streambank erosion. 2. Measurements of vegetated bank strength and consequences for failure mechanics
Bank erosion ; California ; Channel geometry ; Meadow ; Meander ; Riparian vegetation ; Sierra Nevada ; Stream ; United States of America
The AA. measured the effect of wet meadow vegetation on the bank strength and failure mechanics of a meandering montane meadow stream, the South Fork of the Kern River at Monache Meadow, in California's Sierra Nevada. Streambanks colonized by wet
graminoid meadows vegetation were on average 5 times stronger than those colonized by dry xeric meadow and scrub vegetation. The measurements show that strength is correlated with vegetation density indicators, including stem counts.
This paper shows one example of biogeographic inventory of natural ecosystems in an unflooded meadow in the Dyje-Svratka basin. It indicates relations of eco- and geosystems which confirm the necessity of ecological orientation of the present
The subject of this article is the flora and communities of meadows in the Nida valley on Małopolska Upland in southern Poland. A comparison of plant lists from two periods, 1961, and 1983-1989, allowed to determine changes in the taxonomic
and phytosociological structure of the meadow flora in the study area. Comparative analysis of ecological requirements of the species (chosen bioindicative values after Ellenberg method) made it possible to determine changes in some habitat features including moisture
Studies of soil movement have been carried out in the Sudetes Mts. for nearly 30 years, mainly by means of wooden pegs (columns). Three hypsometric-climatic zones were distinguished : low meadows, up to a height of 800 m, old forest at 800-1 200 m
and high meadows, above 1 200 m. Human activities (soil and meadow cultivation, tourism, winter sports) have a great direct and indirect impact on soil movement accelerating it threefold in the low meadows and twofold in the high meadows.
Forest history and meadow invasion at the Rigdon Meadows Archaeological Site, western Cascades, Oregon
Archeological site ; Fire ; Forest ; Holocene ; Human impact ; Meadow ; Oregon ; Palaeo-environment ; Pastureland ; United States of America ; Vegetation dynamics
Combining stand structure and fire-scar data with historical records, aerial photographs, and soil descriptions, the forest history of the Rigdon Meadows Archaeological Site in the western Cascades of Oregon is reconstructed. The A. is specifically
interested in how forest structure and disturbance regimes differed during prehistoric, settlement, and modern periods. Results indicate that forest composition and meadow persistence are determined primarily by disturbance, soil properties, and topography
Effects of wet meadow riparian vegetation on streambank erosion. 1. Remote sensing measurements of streambank migration and erodibility
Aerial photography ; Bank erosion ; California ; Channel geometry ; Geographical information system ; Meadow ; Meander ; Photointerpretation ; Riparian vegetation ; Sierra Nevada ; Stream ; United States of America
The AA. quantified how rates of stream channel migration in a montane meadow vary as a function of the riparian vegetation community. The South Fork of the Kern River at Monache Meadow, located in California's southern Sierra Nevada range, supports
2 distinct types of vegetation : a dry and a wet meadow community. The AA. measured rates of lateral stream migration for dry versus wet meadow reaches from aerial photographs spanning a 40-year period (1955-1995). They used a linear model of meander
To stop further deterioration of fens and fen meadows and to improve fen conservation it is accepted that there should be a better understanding of the interaction between the hydrological and soil conditions in fens. This Ph.D. thesis focuses
on this interaction and the implication for sustainable development of species-rich fens and fen meadows. - (AGD)
A preliminary study on the zone of alpine scrub and meadow of Qinghai-Xizang (Tibetan) Plateau
This natural zone is unique in physical environments and natural ecosystems. The predominant type of vegetation is alpine meadow. It is an important pasturelands of animal husbandry for Tibetan on the plateau. Main vegetation types, animal groups
, characteristics of alpine meadow soils, the altitudinal belt and the horizontal zonality of the natural zone, as well as utilization and management of the grasslands are discussed in the present paper.
Analyse pollinique ; Balsam Meadow ; California ; Dynamique de la végétation ; Etats-Unis ; Géographie de l'Amérique ; Holocène ; Montagne ; Paléoclimatologie ; Quaternaire zones moyennes ; Sierra Nevada ; Végétation
Sediments of Balsam Meadow have produced a 11,000 yr pollen record from the southern Sierra Nevada of California. The Balsam Meadow diagram is divided into three zones (1) The Artemisia zone (11,000-7000 yr BP)| (2) the Pinus zone (7000-3000 yr BP
On the layer-zone of alpine meadow on the Qinghai-Tibetan Plateau
Altitude ; Biogeography ; China ; Climatic zone ; Concept ; Meadow ; Model ; Mountain ; Qinghai ; Spatial variation ; Tibet ; Zonality
In this paper, the relationship of spatial variation between horizontal zone and altitudinal belts of alpine meadow on the Qinghai (Tibetan) Plateau was studied based on its lower and upper limit distributions. The A. will use the concept of layer
Carbonate rock ; Cold area ; Erosion rate ; Field experiment ; Granite ; Heath ; Lapland ; Meadow ; Periglacial features ; Plant canopy ; Soil ; Soil properties ; Sweden ; Weathering
of the ongoing study is to determine near-surface potential weathering rates beneath birch forest, Dryas heath, heath, meadow, solifluction meadow, and willow vegetation cover types. Selected disks were excavated after 1 year, and all disks were excavated after 4