Understanding deltaic resilience in the face of Holocene climate change and human impacts is an important challenge for the earth sciences in characterizing the full range of present and future wetland responses to global warming. Here, we report an 8000-year mass balance record from the Nile Delta to reconstruct when and how this sedimentary basin has responded to past hydrological shifts. In ...

Intensively managed microalgal production facilities are capable of fixing several-fold more carbon dioxide per unit area than trees or crops. Although CO, is still released when fuels derived from algal biomass are burned, integration of microalgal farms for flue gas capture approximately doubles the amount of energy produced per unit of CO, released. Materials derived from microalgal biomass ...

Thís article cxamines recent transformations of the coffee landscape of northern Latin Ame rica through the optic of "place as process." As coffee became the most impurtant regional export crop, its "place" evolved. Coffee lands in northern Latin America now embrace 3.1 million hectares, often contiguous across international borders. Like many agricultural systems, coffee has succumbed to inten...

Conversion of natural forests to plantations, particularly in the tropics, has drawn global attention and concern. Moreover, plantation forestry is on the rise, especially in tropical and sub-tropical regions where growth rates are rapid. Even in the United States where even-age silviculture is being de-emphasized on public land (only about 15Oh of all plantings in recent years), the area in ne...

Asclepias syriaca L. is species-introduced with high potential as a source of biofuel, an important fodder crop for beekeeping, possible biologically active substances. However, the species has invasive activity and may pose threat to biodiversity natural plant communities. And also economic agroecosystems segetal species. In agricultural landscapes central Russia in various habitats dynamics s...

A significant part of arable lands on slopes is subject to removal from active processing, and alkalization with perennial herbs. We know that the most productive are those agro-phytocenoses, forming based a single-species sowing alfalfa (Lucerne), its mixture cereal grasses. However, restrictive factor alfalfa-cereal grasslands high productivity soil solution acid reaction. The research carrie...

BACKGROUND Private land conservation is an essential strategy for biodiversity protection in the USA, where half of the federally listed species have at least 80% of their habitat on private lands. We investigated the alignment between private land protection conducted by the world's largest land trust (The Nature Conservancy) and the science driven identification of priority areas for conserva...

An effective vaccine for genital herpes has been difficult to achieve because of the limited efficacy of subunit vaccines and the safety concerns about live viruses. As an alternative approach, mutant herpes simplex virus strains that are replication-defective can induce protective immunity. To increase the level of safety and to prove that replication was not needed for immunization, we constr...