Increased forest ecosystem carbon and nitrogen storage from nitrogen rich bedrock

  title={Increased forest ecosystem carbon and nitrogen storage from nitrogen rich bedrock},
  author={Scott L. Morford and Benjamin Z. Houlton and Randy A. Dahlgren},
Nitrogen (N) limits the productivity of many ecosystems worldwide, thereby restricting the ability of terrestrial ecosystems to offset the effects of rising atmospheric CO2 emissions naturally. Understanding input pathways of bioavailable N is therefore paramount for predicting carbon (C) storage on land, particularly in temperate and boreal forests. Paradigms of nutrient cycling and limitation posit that new N enters terrestrial ecosystems solely from the atmosphere. Here we show that bedrock… 
Bedrock nitrogen weathering stimulates biological nitrogen fixation.
It is shown that temperate forest ecosystems underlain by N-rich bedrock exhibit higher free-living N fixation rates than similar forests residing on N-poor parent materials, across sites experiencing a range of climate and tectonic regimes.
Direct quantification of long-term rock nitrogen inputs to temperate forest ecosystems.
Direct evidence for rock N weathering is provided in three temperate forest sites residing on a N-rich parent material in the Klamath Mountains (northern California and southern Oregon), USA, suggesting active biologically mediated weathering of growth-limiting nutrients compared to nonessential elements.
Nitrogen Nutrition of Trees in Temperate Forests—The Significance of Nitrogen Availability in the Pedosphere and Atmosphere
It is concluded that soil microbial biomass is of decisive importance for nutrient retention and provision to trees both in high and low N ecosystems.
Isotopic identification of nitrogen hotspots across natural terrestrial ecosystems
Abstract. Nitrogen (N) influences local biological processes, ecosystem productivity, the composition of the atmospheric-climate system, and the human endeavour as a whole. Here we use natural
Leaky nitrogen cycle in pristine African montane rainforest soil
Many pristine humid tropical forests show simultaneously high nitrogen (N) richness and sustained loss of bioavailable N forms. To better understand this apparent upregulation of the N cycle in
Ecology: Nitrogen from the deep
Measurements of the nitrogen concentration and isotopic composition of rocks, soil and leaves are presented to demonstrate that bedrock is a further, hitherto-overlooked source of bioavailable nitrogen to forests in the western United States and suggest that this novel pathway might be a universal phenomenon.
Patterns of new versus recycled primary production in the terrestrial biosphere
It is implied that new N inputs have the greatest capacity to fuel additional NPP by terrestrial plants, whereas low P availability may ultimately constrain NPP across much of the terrestrial biosphere.
Nutrient limitation reduces land carbon uptake in simulations with a model of combined carbon, nitrogen and phosphorus cycling
Terrestrial carbon (C) cycle models applied for cli- mate projections simulate a strong increase in net primary productivity (NPP) due to elevated atmospheric CO2 concen- tration during the 21st
Topographic controls on soil nitrogen availability in a lowland tropical forest
Geomorphic position often correlates with nutrient cycling across landscapes. In tropical forests, topography is known to influence phosphorus (P) availability, but its effect on nitrogen (N) cycling


Soil fertility limits carbon sequestration by forest ecosystems in a CO2-enriched atmosphere
Evidence is presented that estimates of increases in carbon sequestration of forests, which is expected to partially compensate for increasing CO2 in the atmosphere, are unduly optimistic and that fertility can restrain the response of woodcarbon sequestration to increased atmospheric CO2.
Nitrogen in rock: Occurrences and biogeochemical implications
There is a growing interest in the role of bedrock in global nitrogen cycling and potential for increased ecosystem sensitivity to human impacts in terrains with elevated background nitrogen
Nitrogen limitation of net primary productivity in terrestrial ecosystems is globally distributed.
The results suggest that the global N and C cycles interact strongly and that geography can mediate ecosystem response to N within certain biome types.
Increased tree carbon storage in response to nitrogen deposition in the US
Spatially extensive evidence for nitrogen-induced stimulation of forest growth has been lacking. Analysis of forest inventory data from the northeastern and north-central US collected during the
Nitrogen limitation on land and in the sea: How can it occur?
AbstractThe widespread occurrence of nitrogen limitation to net primary production in terrestrial and marine ecosystems is something of a puzzle; it would seem that nitrogen fixers should have a
Global patterns of the isotopic composition of soil and plant nitrogen
We compiled new and published data on the natural abundance N isotope composition (δ15N values) of soil and plant organic matter from around the world. Across a broad range of climate and ecosystem
Spatial and Temporal Patterns in Terrestrial Carbon Storage Due to Deposition of Fossil Fuel Nitrogen
A modeled estimate of terrestrial carbon storage arising from deposition of nitrogen derived from fossil fuels that accounts for spatial distributions in deposition and vegetation types, turnover of plant and soil carbon pools, and the cumulative effects of deposition is described.
The human footprint in the carbon cycle of temperate and boreal forests
It is shown that the temporal dynamics following stand-replacing disturbances do indeed account for a very large fraction of the overall variability in forest carbon sequestration, and that mankind is ultimately controlling the carbon balance of temperate and boreal forests.
Global patterns of terrestrial biological nitrogen (N2) fixation in natural ecosystems
Human activities have clearly caused dramatic alterations of the terrestrial nitrogen cycle, and analyses of the extent and effects of such changes are now common in the scientific literature.
Nitrogen fixation: Anthropogenic enhancement‐environmental response
In the absence of human activities, biotic fixation is the primary source of reactive N, providing about 90–130 Tg N yr−1 (Tg = 1012 g) on the continents. Human activities have resulted in the