نتایج جستجو برای: urban transect
تعداد نتایج: 175005 فیلتر نتایج به سال:
Wildfire number and burned area temporal dynamics within all of Siberia and along a south-north transect in central Siberia (45 ̋–73 ̋ N) were studied based on NOAA/AVHRR (National Oceanic and Atmospheric Administration/ Advanced Very High Resolution Radiometer) and Terra/MODIS (Moderate Resolution Imaging Spectroradiometer) data and field measurements for the period 1996–2015. In addition, fire ...
The world’s oceans are an extremely important component of the global carbon cycle. As anthropogenic greenhouse gas emissions become a growing concern, increasing our understanding of the oceanic carbon system will be a key factor in projecting the affects of global climate change and the ability of the oceans to regulate increases in atmospheric CO2. Extensive progress in this area has been ma...
Bumblebees (Bombus species) are major pollinators of commercial crops and wildflowers but factors affecting their abundance, including causes of recent population declines, remain unclear. Investigating the ecology of species with expanding ranges provides a potentially powerful means of elucidating these factors. Such species may also bring novel pollination services to their new ranges. We th...
Urban environments are the primary contributors to global anthropogenic carbon emissions. Because much of the growth in CO2 emissions will originate from cities, there is a need to develop, assess, and improve measurement and modeling strategies for quantifying and monitoring greenhouse gas emissions from large urban centers. In this study the uncertainties in an aircraft-based mass balance app...
Establishment of a petroleum refinery in 1916 near the headwaters of Bayou Trepagnier with subsequent dredging of the bayou resulted in spoil banks containing high levels of Pb. A large swamp abuts the eastern bank of the bayou. Cores were taken from 15 baldcypress [Taxodium distichum (L.) Richard] trees growing in the swamp along a 610-m transect (nine trees) and a 183-m transect (six trees) r...
Greyfields are construction sites that emerge from the expansion of cities towards rural settings. They unused structures in settlement areas negatively impact habitats and lead to ecologically, economically, socially problematic zones. This study aims examine Greyfield problem, which emerges as one outcomes urban sprawl, within context Transect Theory resilience. We analyze problem Arapkoy set...
A simulation approach was used to study bias and variability of density estimates of fish using the transect and point count underwater visual census methods. Three experiments were conducted to examine the effects of fish density, sampling effort, and the speed of fish in relation to the observer. Fish density and sampling effort did not significantly bias estimates of fish density using eithe...
Meiofauna and macrofauna communities and several sediment characteristics were compared between a slope situated far from the coast (Goban Spur) and two transects across the Iberian Margin with steep slopes and close to the shore. The northern Galician transect (off La Coruña) was situated in an area subjected to wind-induced upwelling events. The western Galician transect was also subjected to...
a r t i c l e i n f o Keywords: KAI GIS GRASS Free and Open Source Wildlife monitoring Mountain hare Kilometric Abundance Index (KAI) is a common measure used in wildlife studies because it allows a straightforward comparison of species abundance in different sites or at different times. KAI expresses the ratio of the total number of individuals (or of signs of presence) observed along a transe...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید