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Edaphoclimatic factors that influence above-ground biomass in tropical forests in the Amazon?

Land use, land-use change and forestry

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Edaphoclimatic factors influencing above-ground biomass (AGB) in tropical forests in the Amazon include soil texture, above-ground biomass (AGB), and distance to savanna. Soil clay content and AGB were identified as key predictors of soil pyrogenic carbon (PyC) variation in intact forests . Additionally, the Random Forest (RF) machine learning algorithm highlighted the significance of average height in estimating AGB in selectively logged tropical forests . The study on estimating AGB in Amazonian forests with selective logging emphasized the role of machine learning algorithms like RF and support vector machine (SVM) in accurately mapping biomass dynamics, with older exploration units showing lower biomass stocks . These findings underscore the importance of considering soil properties, vegetation characteristics, and historical land use in understanding AGB variations in tropical forest ecosystems.

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Open access•Journal Article•DOI Impact of deforestation and climate on the Amazon Basin's above-ground biomass during 1993-2012. Jean-François Exbrayat, Yi Y. Liu, Mathew Williams - Show less +2 more 15 Nov 2017-Scientific Reports 21 Citations	Edaphoclimatic factors and climate change impact above-ground biomass in the Amazon Basin, leading to a decline in forest regeneration potential and biomass storage capacity.
Open access•Journal Article•DOI Aboveground biomass estimation in a tropical forest with selective logging using random forest and lidar data Juliana Marchesan, Elisiane Alba, Mateus Sabadi Schuh, José Augusto Spiazzi Favarin, Rudiney Soares Pereira - Show less +4 more 29 Sep 2020 2 Citations	Not addressed in the paper.
Open access•Journal Article•DOI Soil pyrogenic carbon in southern Amazonia: Interaction between soil, climate, and above-ground biomass Edmar Almeida de Oliveira, Ted R. Feldpausch, Beatriz Schwantes Marimon, Paulo S. Morandi, Oliver L. Phillips, M. Bird, A. Araujo Murakami, Luzmila Arroyo, Carlos Alberta Quesada, Ben Hur Marimon-Junior - Show less +9 more 25 Oct 2022-Frontiers in forests and global change 1 Citations	Soil clay content and above-ground biomass (AGB) are key factors influencing soil pyrogenic carbon in tropical forests in the Amazon, as per the study.
Open access•Journal Article•DOI Above-ground Biomass Recovery in Managed Tropical Forest in the Jari Valley, Eastern Amazon Adriano Castelo dos Santos, Eleneide Doff Sotta, Marcelino Carneiro Guedes, Lilian Blanc - Show less +3 more 15 May 2019-The Journal of Agricultural Science 2 Citations	Edaphoclimatic factors influencing above-ground biomass in Amazon forests include time of monitoring, logging intensity, and forest recovery capacity after reduced-impact logging, as observed in the Jari Valley study.

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Factors that influence above-ground biomass in tropical forests in the Amazon?5 answersFactors influencing above-ground biomass (AGB) in tropical forests in the Amazon include the interaction between the signal and canopy structure, human intervention through selective logging, vegetation indices like NDVI, and the time and intensity of logging activities. The studies highlight the importance of variables such as Pv, σ°HH, αS2, τm, ΦS3, and ΦS2 in estimating AGB. Artificial neural networks, LiDAR data, and Landsat-8 variables are utilized to accurately predict AGB, emphasizing the role of machine learning algorithms like RF and SVM. Additionally, the recovery of AGB post-logging is influenced by monitoring time and logging intensity, with forests able to regain initial AGB levels in areas of low exploitation intensity within 12 years.

How does the aboveground biomass of forests impact carbon storage?5 answersThe aboveground biomass of forests has a significant impact on carbon storage. Forests with higher aboveground biomass tend to store more carbon. For example, in natural forests in China, the average aboveground biomass proportion was 31.09%. In global forests, the proportion of carbon stored as plant biomass varies among forest types, with boreal forests storing only 14±7% of their ecosystem carbon as plant biomass compared to 50±18% for moist tropical forests. Additionally, the aboveground biomass of forests is dependent on factors such as tree diversity, land-use history, and the surrounding landscape. Higher tree diversity leads to higher aboveground biomass in certain ecological contexts. Therefore, understanding and managing aboveground biomass in forests is crucial for carbon storage and climate change mitigation efforts.

The importance of above ground forest biomass estimation ?5 answersEstimating aboveground forest biomass is important for various reasons. It is a crucial indicator of the ecological environment and urban refinement management. Accurate estimation of aboveground biomass is essential for monitoring carbon stock and implementing policies to reduce emissions caused by deforestation. Remote sensing data, such as LiDAR, can provide timely and accurate estimates of forest biomass, contributing significantly to sustainable forest management. The use of remote sensing techniques, including UAV platforms, can provide satisfactory results in estimating aboveground biomass, making it a valuable tool for forest planning and carbon market purposes. Accurate estimation of forest biomass is particularly important in regions undergoing large-scale ecological restoration projects, such as Southwest China, to achieve carbon neutrality and support forest management.

What is the relationship between aboveground biomass and forest carbon?4 answersAboveground biomass in forests is closely related to forest carbon. The amount of biomass and carbon stock in a forest stand can be affected by factors such as planting spacing. Remote sensing, particularly using satellite imagery, is a valuable approach for estimating biomass and carbon in forests when field data is limited. Allometric models, which are based on the relationships between biomass and tree characteristics such as diameter at breast height (DBH) and height, can be used to estimate aboveground biomass and carbon stocks in forests. A new conceptual model combining remotely sensed data from multiple sensors, including species composition, canopy height, and tree crown size, has been proposed to map forest aboveground biomass. Tree diversity also plays a role in aboveground biomass, with higher diversity leading to higher woody productivity and carbon storage in certain ecological contexts.

How does deforestation in the Amazon affect the energy balance of the region on daily scales?5 answersDeforestation in the Amazon affects the energy balance of the region on daily scales. It leads to a reduction in surface net radiation, evaporation, moisture convergence, and precipitation over the entire Amazon basin, resulting in decreased evapotranspiration and less atmospheric moisture of Amazonian origin. Additionally, deforestation increases atmospheric subsidence over the southern Amazon and weakens the regional Hadley cell, while increasing atmospheric stability over the western Amazon and tropical Andes, inhibiting convection in these areas. Surface winds increase significantly during the wet season due to decreased surface roughness, leading to increased vapor transport and easterly moisture export, and a significant decrease in precipitation within the deforested regions of Eastern Amazon. These changes in energy balance have implications for the hydro-climatic connectivity between the Amazon and the eastern tropical Andes, as well as for the rich Andean ecosystems and tropical glaciers.

How do you calculate below ground biomass?8 answers

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