نتایج جستجو برای: white oaks
تعداد نتایج: 182082 فیلتر نتایج به سال:
Landowners in the Appalachian region are becoming increasingly interested in restoring the native hardwood forest on mined land after reclamation. Trees are usually planted in topsoil substitutes consisting of blasted rock strata from the geologic profile. Reforestation attempts using native hardwoods have often been unsuccessful due to the highly variable nature of the physical, chemical, and ...
After decades of multiyear defoliation episodes in southern New England, Lymantria dispar (previously gypsy moth) populations diminished with the appearance L. fungus 1989. Multiyear defoliations did not occur again until 2015–2018. To assess impact return defoliations, we examined 3095 oaks on 29 permanent study areas Connecticut and Rhode Island that were established at least 11 years before ...
INTRODUCTION Although oaks dominate many forest ecosystems worldwide (Barnes and others 1998), several aspects of oak ecology remain poorly understood including oak regeneration and masting (McShea and Healy 2001). Animals that eat and disperse acorns, such as squirrels, mice, and jays may play a pivotal role in oak forest dynamics (Jones and others 1998, Ostfeld and others 1996), influencing r...
The hydrocarbon isoprene plays an important role in atmospheric chemistry, particularly in regards to air pollution and climate change. It is important to know why certain plant species emit isoprene and what factors affect its production in order to predict future air quality. Past research has indicated that isoprene aids in coping with heat stress, so it was hypothesized that source latitude...
As non-native species move across the landscape and hydrofracking and other human impacts increase in scope, it is becoming more critical than ever that we can quantify changes to community structure. In order to do that, however, we must first have baseline data on which species are initially present. These baseline data also have the benefit of facilitating speciesspecific research by identif...
Kantorowicz nie jest znany jako badacz bizantyńskiego Wschodu. Faktem jednak, że przez większą część swej naukowej kariery intensywnie zajmował się Bizancjum. Od 1940 r., czyli od początku pracy na Uniwersytecie w Berkeley, regularnie brał udział konferencjach bizantynologicznych; roku 1950 tych organizowanych ośrodek Dumbarton Oaks. W ostatnich latach życia przygotowywał do druku książkę zbier...
OBJECTIVE Gambling has exploded in popularity, but pathological gambling (PG) is infrequently diagnosed. The objectives of this study were to calculate the prevalence of PG in a psychiatry clinic, to determine whether PG is underdiagnosed, and to analyze risk factors for PG. METHODS A survey was completed by 584 outpatients presenting to the Naval Medical Center Portsmouth psychiatry clinic o...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید