Combining Sample Designs to Account for the Whole Necromass Carbon Stock in Brazilian Atlantic Forest

O crescimento populacional e as questões climáticas impõem desafios à sociedade, principalmente no que diz respeito ao abastecimento de alimentos e à manutenção de condições desejáveis do solo. Além disso, há uma evidente necessidade de reduzir as emissões de gases de efeito estufa, notadamente àquelas causadas por mudanças no uso do solo. Portanto, há necessidade de estudos que abordem o entendimento das condições do solo sob os diferentes usos do solo, uma vez que esses podem se tornar fontes de carbono dependendo das práticas de manejo. Este estudo foi conduzido em perfis de Plintossolos Amazônicos sob: florestas primárias, pastagens para pecuária e plantios mistos de restauração florestal. A densidade e o teor de carbono foram avaliados em quatro profundidades (0-5, 5-10, 10-20 e 20-40 cm), enquanto as propriedades físicas foram examinadas nas profundidades de 0-20 e 20-40 cm. Solos sob florestas primárias apresentaram as menores densidades e os maiores teores de carbono quando comparados a outros usos da terra. Esses solos também apresentaram o maior estoque de carbono. Entretanto, não foi observada diferença significativa pelo teste de Tukey para ambas variáveis. As pastagens apresentaram maiores estoques de carbono quando comparados aos plantios mistos (aos 10 anos). Nossos resultados indicaram que práticas de manejo adequadas são necessárias para a manutenção da capacidade produtiva do solo após a conversão de florestas para outros usos. Os Plintossolos, por suas características texturais e mineralógicas, apresentaram elevados teores de quartzo, notadamente nas camadas superficiais, demonstrando quão sensíveis às mudanças na paisagem. O estoque de carbono no solo é, portanto, sensível às mudanças na sua cobertura. Este estudo fornece informações úteis para o entendimento do estoque de carbono em Plintossolos na Amazônia Brasileira, bem como para aprimorar as estimativas realizadas no Inventário Nacional de Emissões de Gases de Efeito Estufa.

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“…The carbon fraction (gC.g -1 ) was determined by the dry combustion method in a Leco C-144 analyzer (MAAS et al, 2020).…”

Section: Soil Density and Carbon Fractionmentioning

confidence: 99%

Amazon plinthosols: carbon stocks and physical properties under different land uses

et al. 2021

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“…Several studies have been dedicated to understanding the role of forests in removing carbon from the atmosphere and maintaining their stocks in biomass (HEINRICH et al, 2021;MAAS et al, 2021;ROSA et al, 2021;SANQUETTA et al, 2018;SILVA et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…Diversos estudos vêm se dedicando a entender o papel das florestas na remoção do carbono da atmosfera e na manutenção dos seus estoques na biomassa (HEINRICH et al, 2021;MAAS et al, 2021;ROSA et al, 2021;SANQUETTA et al, 2018;SILVA et al, 2021).…”

Section: Introductionunclassified

Carbon stock assessment and comparison in soybean plantations in Southwest Brazilian Amazon

Araujo

Pelissari

Corte

et al. 2022

AGRO@MBIENTE ON-LINE

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A significant proportion of deforestation in the Amazon rainforest is for the expansion of agriculture and livestock. Several studies have been dedicated to determining the carbon stock in natural forests, however agricultural areas are still poorly researched. This work aimed to quantify the above and belowground carbon stock (CS) in soybean plantations in the State of Rondonia, Southwest region of the Brazilian Amazon, as well as to compare the results with the estimate of other possible land uses in the same region. Thus, a total of 50 sampling units 1 m² were quantified at random in order to measure aboveground and belowground biomass. The total biomass found was 7.55 Mg ha-1, with 6.73 Mg ha-1 (89.14%) corresponding to aboveground biomass and 0.83 Mg ha-1 (10.86%) corresponding to belowground biomass. The average total carbon stock was 3.49 Mg ha-1, ranging from 2.14 Mg ha-1 to 6.36 Mg ha-1. In comparing the study data with the Brazilian Inventory of Anthropic Emissions and Removals of Greenhouse Gases, it was observed that the change in the use of the mature Amazon Rainforest land for soybean cultivation resulted in the loss of 176.61 Mg ha-1 of C. Therefore, soybean cultivation can be an alternative in the absence of natural vegetation with no possibility of natural recovery, because in addition to grain production, it contributes to the carbon stock and nitrogen fixation in the soil. However, replacing natural vegetation is not an adequate practice for biomass and carbon stocks.

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Disentangling Ecosystem Necromass Dynamics for Biodiversity Conservation

Barton,

Schultz,

Butterworth

et al. 2024

Ecosystems

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Global environmental change has redistributed earth’s biomass and the inputs and dynamics of basal detrital resources in ecosystems, contributing to the decline of biodiversity. Yet efforts to manage detrital necromass for biodiversity conservation are often overlooked or consider only singular resource types for focal species groups. We argue there is a significant opportunity to broaden our perspective of the spatiotemporal complexity among multiple necromass types for innovative biodiversity conservation. Here, we introduce an ecosystem-scale perspective to disentangling the spatial and temporal characteristics of multiple and distinct forms of necromass and their associated biota. We show that terrestrial and aquatic ecosystems contain a diversity of necromass types, each with contrasting temporal frequencies and magnitudes, and spatial density and configurations. By conceptualising an ecosystem in this way, we demonstrate that specific necromass dynamics can be identified and targeted for management that benefits the unique spatiotemporal requirements of dependent decomposer organisms and their critical role in ecosystem biomass conversion and nutrient recycling. We encourage conservation practitioners to think about necromass quantity, timing of inputs, spatial dynamics, and to engage with researchers to deepen our knowledge of how necromass might be manipulated to exploit the distinct attributes of different necromass types to help meet biodiversity conservation goals.

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Combining Sample Designs to Account for the Whole Necromass Carbon Stock in Brazilian Atlantic Forest

Cited by 5 publications

References 48 publications

Amazon plinthosols: carbon stocks and physical properties under different land uses

Amazon plinthosols: carbon stocks and physical properties under different land uses

Carbon stock assessment and comparison in soybean plantations in Southwest Brazilian Amazon

Disentangling Ecosystem Necromass Dynamics for Biodiversity Conservation

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