نتایج جستجو برای: shrublands
تعداد نتایج: 634 فیلتر نتایج به سال:
Satellite photo-comparisons indicate extensive expansion of alder (Alnus) shrubs since 1968 within tundra ecotones near Kharp in northwest Siberia. Field observations reveal that nearly all expansion occurred on exposed circles in patterned ground. We mapped the location of alders and circles and measured surface organic thickness, mineral soil thickness, nearsurface soil temperature, shrub hei...
OBJECTIVE To investigate the precise species of tick vector and the Borrelia spirochete pathogen at the Heilongjiang Province international border with Russia. METHODS In this study, ticks were collected from 12 Heilongjiang border crossings (including grasslands, shrublands, forests, and plantantions) to determine the rate and species type of spirochete-infected ticks and the most prevalent ...
Abstract The impacts of wildfires are increasing in the Mediterranean Basin due to more extreme fire seasons featuring increasingly fast and high-intensity fires, which often overwhelm response capacity suppression forces. Fire behaviour is expected become even severe climate change. In this study, we quantified effect change on danger (components Canadian FWI System) wildfire characteristics (...
This study demonstrates the ability of GIS and Remote Sensing in capturing spatial-temporal data on land use and land cover classes. The nine land cover classes captured were Built-up area, Secondary forests, Savannah, Grasslands, and Shrublands containing herbaceous, Rain-fed shrub crops, Fresh water swamps, Water bodies, and Farmlands. The remote sensed imageries also displayed how the land u...
Based on published research and watershed assessment techniques, we evaluated the feasibility of augmenting water yields in the Klamath River and its major tributaries by removing western juniper, which has expanded dramatically within the Klamath River Basin over the past 130 years. The results suggest that the conversion of western juniper woodlands to shrublands or grasslands would not subst...
In the Drylands of Northern China, such as the Loess Plateau region, a buffer zone of planted forests—a “Green Great Wall”—has been created in the last five decades. These government programs have often generated unintended environmental consequences, and have failed to achieve the desired benefits. Planted forests withhold erosion, dust storms and silting of streams but may reduce stream flow ...
Human domination of the biosphere includes changes to disturbance regimes, which push many ecosystems towards early-successional states. Ecological theory predicts that early-successional ecosystems are more sensitive to perturbations than mature systems, but little evidence supports this relationship for the perturbation of climate change. Here we show that vegetation (abundance, species richn...
Przewalskium albirostre (Przewalski, 1883) is a physically unique cervid commonly called the white-lipped deer. Przewalskium is monotypic. This species is a high-elevation specialist endemic to the eastern Tibetan Plateau where it inhabits relatively open hills and mountains with a mosaic of forest edges, meadows, and shrublands. Populations of P. albirostre are highly fragmented and vulnerable...
Urartucoris ermolenkoi P. V. Putshkov, 1979 (Hemiptera: Heteroptera: Coreidae: Pseudophloeinae) is recorded from Turkey for the first time. Redescriptions of the genus and species are provided, the male of Urartucoris ermolenkoi being described for the first time, and intraspecific variability of the species is discussed. Adults of Urartucoris ermolenkoi were collected from mid April to end of ...
Many widely known invasive plants are well integrated into native plant–pollinator networks. Typically, these invaders have entomophilous flowerswhich are visited by a diverse array of pollinators. The type of breeding system and the role that pollination services play in the reproductive success of invasive plants have, however, received little attention. We studied the breeding system and pol...
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