Vegetatio
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Sắp xếp:
Ecological gradients of boreal forests in South Finland: an ordination test of Cajander's forest site type theory
Vegetatio - Tập 68 - Trang 145-156 - 1987
Ecological gradients in the field layer of southern boreal forests in South Finland were studied in relation to the dominant tree species and the age of forest stands. The data are from a systematic sample of 529 plots from an area of 150 × 200 km, collected in the Third National Forest Inventory in 1951–53. Detrended correspondence analysis (DCA) was applied to log-transformed species cover value......
Ecological significance and classification of Chinese wetlands
Vegetatio - Tập 118 - Trang 49-56 - 1995
China supports a great variety of wetlands, including some of the most important in the world. However, an appropriate classification system applicable to all wetlands is not available. Based on a preliminary inventory, a new classification system for Chinese wetlands is proposed. This system classifies natural wetlands into three categories on the basis of their natural features and distribution:......
Tree regeneration patterns on Mount Usu, northern Japan, since the 1977–78 eruptions
Vegetatio - Tập 126 - Trang 191-198 - 1996
Although the summit of Mount Usu was deforested by the 1977–78 eruptions, vegetative regeneration on the caldera rim was rapid due to the erosion of thick volcanic deposits by snow and rain. To obtain the mechanisms underlying regeneration patterns after the eruptions, we monitored the growth of permanently-marked stems from 1983 to 1990. Regeneration was from resprouting-branches buried in the vo......
Stand-level dieback and regeneration of forests in the Galápagos Islands
Vegetatio - Tập 77 - Trang 87-93 - 1988
Stand-level dieback and regeneration of forests in Galápagos are discussed, and related to natural- and man-made disturbances. The dieback of Scalesia pedunculata (Asteraceae) in Galápagos seems to follow the etiology and patterns seen in other pacific island groups. The currently large and synchronized cohorts of this early-successional species, found on Santa Cruz Island, may be explained by sev......
Spatial autocorrelation and sampling design in plant ecology
Vegetatio - Tập 83 - Trang 209-222 - 1989
Using spatial analysis methods such as spatial autocorrelation coefficients (Moran's I and Geary's c) and kriging, we compare the capacity of different sampling designs and sample sizes to detect the spatial structure of a sugar-maple (Acer saccharum L.) tree density data set gathered from a secondary growth forest of southwestern Québec. Three different types of subsampling designs (random, syste......
Coastline ecosystems on Oahu, Hawaii
Vegetatio - Tập 25 - Trang 367-400 - 1972
Coatline ecosystems on Oahu, Hawaii were described in terms of vegetation composition and structure, and environmental components such as climate, physiography, exposure, substratum, and ground water. Vegetation patterns were related to these environmental components. Relevés were established in 22 study areas around Oahu to study the broader patterns of vegetation and environment, and 2 m wide be......
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