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Showing 1 to 17 of 17 for “"vegetation development"”.
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Pheasant Nesting and Vegetation Development in Dense Nesting Cover Established Under the South Dakota Pheasant Restoration Program
… fields, pastures, and small grain fields. Vegetation density and cover development were monitored on DNC plots. Nest densities were generally greatest in DNC plots followed by roadsides and alfalfa fields. Pastures and small grain fields contained the lowest nest densities. No relationship …
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Impacts of Urban Areas on Vegetation Development Along Rural-Urban Gradients in the Upper Midwest: 2003-2012
… Zhu 2013). Here I use the normalized difference vegetation index (NDVI) product provided by the Web-Enabled Landsat Data (WELD) project to analyze the impacts of urban areas and urban heat islands on the seasonal development of the vegetated land surface on an urban-rural gradient for six regions …
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Mapping and Modelling of Vegetation Changes in the Southern Gadarif Region, Sudan, Using Remote Sensing
… and its rapid expansion on the natural vegetation in the southern Gadarif Region. To achieve these objectives the study utilized a series of techniques. Beside the intensive use of remote sensing imagery, interviews with key informants and farmers as well as detailed field surveys were …
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Vegetation dynamics in a semi-arid freshwater wetland: a measure for restoration success
… anthropogenic activities, which affect wetlands’ vegetation development and their ability to offer ecosystem services. The need to understand vegetations’ natural regeneration, in previously degraded wetlands of semi-arid regions is essential to measure restoration success. Nylsvley freshwater …
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Small mammal use of abandoned surface mines in southwestern Virginia
… small mammal diversity and abundance and select vegetation and site factors. Eleven species of mammals were captured during four, six-night trapping periods. Peromyscus leucopus noveboracensis and P. maniculatus nubiterrae were the most abundant and widespread mammals encountered on the mines. …
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Plant Community Development of Isle Royale's Moose-Spruce Savannas
… starting to break-up. The changes in understory vegetation brought about by savanna formation have received little attention, even though the future of moose and wolf populations on Isle Royale are tied to these vegetation changes. This study examined the vegetation of savannas ranging in age …
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Pollen analysis, chronology and palaeomagnetism of three Late Weichselian sites in southern Sweden
… for southern Sweden, and reflect the vegetation development from the deglaciation to the transition to the Holocene. The annual time-resolution of the varved clays has made it possible to calculate pollen accumulation rates based on actual sedimentation rates. The delayed onset of …
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Aerial photography and environmental impact analysis : the potential contribution of comparative interpretation of multi-temporal aerial photographs to Environmental Impact Analysis
… 1983 at scales ranging from 1:7 000 to 1:50 000. Development of the site for recreation began in 1972 and in 1976 for water extraction. Pre-development photographs, 1938, 1960, 1968 and 1971, were stereoscopically compared and the observations were interpreted using a systems approach. From the …
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Climate-driven growth of croplands and grasslands: analysis and modeling at regional scale
… of the interactions between climate and vegetation is a key issue in environmental sciences, and especially for researchers studying climate change impacts on terrestrial ecosystems. Indeed in order to better predict changes in ecosystems productivity, scientists are investing time and e …
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Long-term dynamics of forest phenology across the central hardwoods
… In this project, I used 40 years of Enhanced Vegetation Index (EVI) values from Landsat multispectral imagery to model spatially explicit estimates of phenological transition dates under a Bayesian hierarchical framework. From these estimates, I additionally measured long-term trends and used …
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Optical and radar remote sensing of land use and land cover change in the tropics: An assessment of deforestation and secondary vegetation
… cleared land (pasture, croplands, or secondary vegetation), techniques for estimating persistence, rates of succession, and biomass of secondary vegetation are needed.</p><p>We documented the spatial and inter-annual variability in the rates of forest clearing, formation rates and persistence of …
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Vegetation community development eight years after harvesting in small streams buffers at the Malcolm Knapp Research Forest
… objectives of this research were to compare the vegetation community composition and structure eight years after harvesting and to explore successional trends among buffer widths at year eight after disturbance and in a chronosequence. A series of small clearcuts were harvested in 1998 in a 70 …
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Regional summer climate variability and change over North America in the 20th Century
… in most cases, the regional climate impacts from vegetation development in the study area over this period outweigh the impacts from greenhouse gases, but in all variables except temperature, the combined impacts of LULC and GHG alone are not adequate to reproduce the observed climate changes. The …
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Evaluation of Modis Products Over Four European Ecological Study Sites
Global vegetation is a key component of the climate system due to its key role in geosphere-biosphere-atmosphere interactions. Understanding these processes is of important for predicting future climate and the future state of terrestrial ecosystems. Land surface properties such as the land cover …
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Factors affecting the recruitment of riparian vegetation on the Ord and Blackwood Rivers in Western Australia
… in the recruitment and regeneration of riparian vegetation. As there has been a paucity of basic ecological studies on riparian vegetation in Australia, the project is broad in scope, and gives a general picture of the factors influencing, the regeneration of riparian vegetation and provides a …
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Stormy records from peat bogs in south-west Sweden : implications for regional climatic variability and vegetation changes during the past 6500 years
… explain variations in storm activity, humidity, vegetation composition and land cover in south-west Sweden during the past 6500 years. Two ombrotrophic bogs, Store Mosse and Undarsmosse, situated on the coastal plain of Halland, were selected for this purpose. The coastal plain of Halland is …
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Patterns of temporal changes in species composition and diversity in island ecosystems
… understood in the early stages of communities’ development. Young oceanic islands offer the unique opportunity of a natural laboratory for the investigation of such processes. The interest in using different facets of biodiversity, in order to understand ecological processes rose over the past …