نتایج جستجو برای: carbon stocks

تعداد نتایج: 293941  

Journal: :Environmental monitoring and assessment 2008
C E G R Schaefer E F do Amaral B A F de Mendonça H Oliveira J L Lani L M Costa E I Fernandes Filho

The relationships between soils attributes, soil carbon stocks and vegetation carbon stocks are poorly know in Amazonia, even at regional scale. In this paper, we used the large and reliable soil database from Western Amazonia obtained from the RADAMBRASIL project and recent estimates of vegetation biomass to investigate some environmental relationships, quantifying C stocks of intact ecosystem...

Journal: :The New phytologist 2012
Dejun Li Shuli Niu Yiqi Luo

• Afforestation has been proposed as an effective method of carbon (C) sequestration; however, the magnitude and direction of soil carbon accumulation following afforestation and its regulation by soil nitrogen (N) dynamics are still not well understood. • We synthesized the results from 292 sites and carried out a meta-analysis to evaluate the dynamics of soil C and N stocks following afforest...

2012
Gregory P Asner John K Clark Joseph Mascaro Romuald Vaudry K Dana Chadwick Ghislain Vieilledent Maminiaina Rasamoelina Aravindh Balaji Ty Kennedy-Bowdoin Léna Maatoug Matthew S Colgan David E Knapp

BACKGROUND Accurate, high-resolution mapping of aboveground carbon density (ACD, Mg C ha-1) could provide insight into human and environmental controls over ecosystem state and functioning, and could support conservation and climate policy development. However, mapping ACD has proven challenging, particularly in spatially complex regions harboring a mosaic of land use activities, or in remote m...

2014
Lisa J. Samuelson Tom A. Stokes John R. Butnor Kurt H. Johnsen Carlos A. Gonzalez-Benecke Pete Anderson Jason Jackson Lorenzo Ferrari Tim A. Martin Wendell P. Cropper

Longleaf pine (Pinus palustris Mill.) restoration in the southeastern United States offers opportunities for carbon (C) sequestration. Ecosystem C stocks are not well understood in longleaf pine forests, which are typically of low density and maintained by prescribed fire. The objectives of this research were to develop allometric equations for aboveand below-ground biomass and quantify ecosyst...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2011
Sassan S Saatchi Nancy L Harris Sandra Brown Michael Lefsky Edward T A Mitchard William Salas Brian R Zutta Wolfgang Buermann Simon L Lewis Stephen Hagen Silvia Petrova Lee White Miles Silman Alexandra Morel

Developing countries are required to produce robust estimates of forest carbon stocks for successful implementation of climate change mitigation policies related to reducing emissions from deforestation and degradation (REDD). Here we present a "benchmark" map of biomass carbon stocks over 2.5 billion ha of forests on three continents, encompassing all tropical forests, for the early 2000s, whi...

2015
Trisha B. Atwood Rod M. Connolly Euan G. Ritchie Catherine E. Lovelock Michael R. Heithaus Graeme C. Hays James W. Fourqurean Peter I. Macreadie

NATURE CLIMATE CHANGE | VOL 5 | DECEMBER 2015 | www.nature.com/natureclimatechange Climate change is an urgent societal issue that can be addressed by a combination of reduced emissions and climate mitigation strategies, including those based on natural carbon (C) stores (that is, biosequestration). The need to reduce atmospheric CO2 concentrations combined with global interest in C trading and...

2017
Stacey M. Trevathan-Tackett Peter I. Macreadie Jonathan Sanderman Jeff Baldock Johanna M. Howes Peter J. Ralph

Seagrass ecosystems have recently been identified for their role in climate change mitigation due to their globally-significant carbon sinks; yet, the capacity of seagrasses to sequester carbon has been shown to vary greatly among seagrass ecosystems. The recalcitrant nature of seagrass tissues, or the resistance to degradation back into carbon dioxide, is one aspect thought to influence sedime...

2012
John M. Anderies Johan Rockstrom S. R. Carpenter Will Steffen J. M. Anderies Johan Rockström

This paper develops a minimal model of land use and carbon cycle dynamics and explores the relationship between nonlinear dynamics and planetary boundaries. Only the most basic interactions between land cover, terrestrial carbon stocks and atmospheric carbon stocks are considered. The goal is not to predict global carbon dynamics as it occurs in the actual earth system, but rather, to construct...

2015
Erika Berenguer Toby A. Gardner Joice Ferreira Luiz E. O. C. Aragão Plínio B. Camargo Carlos E. Cerri Mariana Durigan Raimundo C. Oliveira Junior Ima C. G. Vieira Jos Barlow Andrew Hector

Across the tropics, there is a growing financial investment in activities that aim to reduce emissions from deforestation and forest degradation, such as REDD+. However, most tropical countries lack on-the-ground capacity to conduct reliable and replicable assessments of forest carbon stocks, undermining their ability to secure long-term carbon finance for forest conservation programs. Clear gu...

2004
R. A. Houghton C. L. Goodale

Most changes in land use affect the amount of carbon held in vegetation and soil, thereby, either releasing carbon dioxide (a greenhouse gas) to, or removing it from, the atmosphere. The greatest fluxes of carbon result from conversion of forests to open lands (and vice versa). Model-based estimates of the flux of carbon attributable to land-use change are highly variable, however, largely as a...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید