نتایج جستجو برای: forest stock

تعداد نتایج: 195367  

Journal: :Ecological applications : a publication of the Ecological Society of America 2012
G Vieilledent R Vaudry S F D Andriamanohisoa O S Rakotonarivo H Z Randrianasolo H N Razafindrabe C Bidaud Rakotoarivony J Ebeling M Rasamoelina

Allometric equations allow aboveground tree biomass and carbon stock to be estimated from tree size. The allometric scaling theory suggests the existence of a universal power-law relationship between tree biomass and tree diameter with a fixed scaling exponent close to 8/3. In addition, generic empirical models, like Chave's or Brown's models, have been proposed for tropical forests in America ...

A. Savari, A.R. Safahieh, M. Hamidian Pour, M. Khaleghi, S. Ghaemmaghami,

The mangrove forest ecosystem is known to possess a variety of ecosystem services, including high rates of carbon sequestration, storage and mitigating climate change through reduced deforestation. This study was carried out in the mangrove forests of Gowatr Bay, Gulf of Oman during 2017-18 to quantify biomass and carbon stocks of all components of this forest, including live and dead trees, so...

2012
CHRISTOPHER W. WOODALL GRANT M. DOMKE DAVID W. MacFARLANE CHRISTOPHER M. OSWALT

The United Nations Framework Convention on Climate Change (UNFCCC, 1992) requires signatory countries to develop and report their national inventories of forest carbon (C) sources and sinks (Brown, 2002), due to the recognized role that forests play in the global C cycle (Dixon et al., 1994; Bonan, 2008; Malmsheimer et al., 2008; Ryan et al., 2010). One important pool of forest C is deadwood (G...

2015
J. D. M. Speed V. Martinsen A. J. Hester Ø. Holand J. Mulder A. Mysterud G. Austrheim

Treelines differentiate vastly contrasting ecosystems: open tundra from closed forest. Treeline advance has implications for the climate system due to the impact of the transition from tundra to forest ecosystem on carbon (C) storage and albedo. Treeline advance has been seen to increase above-ground C stocks as low vegetation is replaced with trees but decrease organic soil C stocks as old car...

1999
Erkki Tomppo Juha Heikkinen

Finland’s forest resources have been investigated by means of National Forest Inventories since 1921. The inventories have produced a detailed picture of forest resources and the state of forests as well as long time series. Although the structure of the growing stock and the forest balance have been the most important characteristics, the whole scope is much wider, including information on for...

2016
Chao Zhang Beicheng Xia Junyu Lin

Forest ecosystems make a greater contribution to carbon (C) stocks than any other terrestrial ecosystem. To understand the role of regional forest ecosystems in global climate change and carbon exchange, forest C stocks and their spatial distribution within the small (2300 km2) Liuxihe River basin in China were analyzed to determine the different contributors to the C stocks. Forest C stocks we...

2011
Gherardo Chirici Anna Barbati Piermaria Corona Marco Marchetti Davide Travaglini Fabio Maselli Roberta Bertini

This paper describes applications of non-parametric and parametricmethods for estimating forest growing stock volumeusingLandsat images on the basis of data measured in the field, integrated with ancillary information. Several k-Nearest Neighbors (k-NN) algorithm configurations were tested in two study areas in Italy belonging toMediterranean andAlpine ecosystems. Field datawere acquired by the...

2012
R. K. Chaturvedi A. S. Raghubanshi J. S. Singh

Accurate characterization of biomass in different forest components is important to estimate their contribution to total carbon stock. Due to lack of allometric equations for biomass estimation of woody species at juvenile stage, the carbon stored in this forest component is ignored. We harvested 47 woody species at juvenile stage in a dry tropical forest and developed regression models for the...

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