Responses of trace gases to hydrologic pulses in desert floodplains
نویسندگان
چکیده
منابع مشابه
Cold Desert Alteration of Martian Meteorites: Mixed News from Noble Gases, Trace Elements and Oxygen Isotopes
Introduction: Currently, about 30% of the known Martian meteorites have been found in Antarctica, with some rare samples such as the orthopyroxenite AHL84001 amongst them [1]. We have previously shown [2, 3] that terrestrial weathering in hot and cold deserts can cause elemental fractionation of air incorporated into those meteorites, which complicates the quantification of the noble gas compon...
متن کاملMetagenomic evidence for metabolism of trace atmospheric gases by high-elevation desert Actinobacteria
Previous surveys of very dry Atacama Desert mineral soils have consistently revealed sparse communities of non-photosynthetic microbes. The functional nature of these microorganisms remains debatable given the harshness of the environment and low levels of biomass and diversity. The aim of this study was to gain an understanding of the phylogenetic community structure and metabolic potential of...
متن کاملGreenfall Links Groundwater to Aboveground Food Webs in Desert River Floodplains
Groundwater makes up nearly 99% of unfrozen freshwater worldwide and sustains riparian trees rooted in shallow aquifers, especially in arid and semiarid climates. The goal of this paper is to root animals in the regional water cycle by quantifying the significance of groundwater to riparian animals. We focused our efforts on the cricket, Gryllus alogus: a common primary consumer found in floodp...
متن کاملDrought responses of flood-tolerant trees in Amazonian floodplains.
BACKGROUND Flood-tolerant tree species of the Amazonian floodplain forests are subjected to an annual dry period of variable severity imposed when low river-water levels coincide with minimal precipitation. Although the responses of these species to flooding have been examined extensively, their responses to drought, in terms of phenology, growth and physiology, have been neglected hitherto, al...
متن کاملClimate change and trace gases.
Palaeoclimate data show that the Earth's climate is remarkably sensitive to global forcings. Positive feedbacks predominate. This allows the entire planet to be whipsawed between climate states. One feedback, the 'albedo flip' property of ice/water, provides a powerful trigger mechanism. A climate forcing that 'flips' the albedo of a sufficient portion of an ice sheet can spark a cataclysm. Ine...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Geophysical Research: Biogeosciences
سال: 2012
ISSN: 0148-0227
DOI: 10.1029/2011jg001775