نتایج جستجو برای: historical landscape
تعداد نتایج: 174233 فیلتر نتایج به سال:
A spatially continuous representation of presettlement forest patterns has broad applications, including local and landscape-scale vegetation reconstruction, landscape change, and analysis of effects of human impact on land use change. Typically, presettlement vegetation patterns are reconstructed using historical survey data in the form of Geographical Information Systems (GIS) layers using a ...
Aim Land-use history can be an important determinant of ecosystem characteristics, even in landscapes that outwardly appear natural . In New England, like much of the eastern United States, the natural reforestation of agricultural lands over the past 150 years has created a predominantly forested landscape. Understanding the physiographical and historical factors controlling forest structure a...
There is great uncertainty over the timing and magnitude of the termination of the African Humid Period (AHP). Spanning from the early to middle Holocene, the AHP was a period of enhanced moisture over most of northern and eastern Africa. However, beginning 8000 years ago the moisture balance shifted due to changing orbital precession and vegetation feedbacks. Some proxy records indicate a rapi...
The genetic history of African populations is increasingly well documented, yet their patterns of epigenomic variation remain uncharacterized. Moreover, the relative impacts of DNA sequence variation and temporal changes in lifestyle and habitat on the human epigenome remain unknown. Here we generate genome-wide genotype and DNA methylation profiles for 362 rainforest hunter-gatherers and seden...
Accumulations of shed caribou antlers (Rangifer tarandus) are valuable resources for expanding the temporal scope with which we evaluate seasonal landscape use herds. Female their within days giving birth, thus marking calving ground locations. Antler geochemistry ( 87 Sr/ 86 Sr) reflects isotopic signature regions used during antler growth, thereby providing data on a second component use. Her...
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