Carbon stocks in necromass and soil pools of a Mozambican tropical dry forest under different disturbance regimes

Magalhães, Tarquinio Mateus

doi:10.1016/j.biombioe.2017.07.023

Cited by 11 publications

(10 citation statements)

References 27 publications

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“…Moreover, the SOC and TN stocks in the MW sites in the study area are also lower than estimations of 34.09 Mg ha -1 of SOC and 6.75 Mg ha -1 of TN found in Zambian MW (Mlambo et al 2007). Furthermore, our findings contrast with those of other studies, which reported higher SOC stocks in AF (Molotja et al 2011;Khavhagali and Ligavha-Mbelengwa 2009;Magalhães 2017). The lower SOC and TN stock observed in this study can be attributed to several factors such as low productivity under variable moisture and temperature, erratic rainfall and low soil water-holding capacities at the study site (Evan and Ehleringer 1994;Scholes and Archer 1997;Lal 2014).…”

Section: Relationship Between Woodland Type and Soil Organic Carbon Acontrasting

confidence: 94%

Effect of charcoal production and woodland type on soil organic carbon and total nitrogen in drylands of southern Mozambique

Lisboa

Woollen

Grundy

et al. 2020

Forest Ecology and Management

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African woodland ecosystems function as important reservoirs for soil organic carbon (SOC) and total nitrogen (TN). However, these ecosystem functions are particularly sensitive to social-ecological factors, the impacts of which remain understudied. Here, we examine how vegetation type and charcoal production affect SOC and TN in dry woodlands of southern Africa, focusing on three woodland ecosystems that represent the main types in southern Mozambique: Androstachys forest, Combretum woodland and Mopane woodlands. Drawing on data from soil surveys at 0-5 cm and 0-30 cm depth in different vegetation types and both distant from and proximate to sites of active charcoal production, we estimate that woodlands in Mabalane District store on average 19 ± 10 (± SE) Mg ha-1 of SOC, and 2.2 ± 0.9 Mg ha-1 of TN at 0-30 cm, significantly lower than values reported for other Miombo woodlands in the region. Our analysis shows that woodland type does not directly influence the amount of SOC and TN stored in soil, and that soil proximate to charcoal kilns had twice the amount of SOC (30.0 ± 1.8 Mg ha-1) and TN (4.5 ± 0.5 Mg ha-1) compared with non-charcoal plots. This study adds to our understanding of the impact of charcoal production on soil SOC and TN in dry woodlands of southern Africa, and demonstrates some localised impacts of charcoal production. We discuss the implications of our findings in the light of emerging carbon-based payments for ecosystem services programmes in the region.

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Section: Relationship Between Woodland Type and Soil Organic Carbon Acontrasting

confidence: 94%

Effect of charcoal production and woodland type on soil organic carbon and total nitrogen in drylands of southern Mozambique

Lisboa

Woollen

Grundy

et al. 2020

Forest Ecology and Management

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“…The region has pedogeomorphologic gradients with aluminum-rich dystrophic latosols at the tops of hills, colluvial ramps with shallow latosols and cambic horizon, while the bottoms of the groves present a predominance of epieutrophic cambisols rich in nutrients [24]. for invertebrates and vertebrates [13], integration of forest nutrient cycling [14,15], and storing carbon [16][17][18]. Necromass is estimated to be responsible for stocking 73.0 ± 6.0 PgC, representing 8% of the world's forest carbon [19].…”

Section: Description Of the Study Areamentioning

confidence: 99%

“…This increase in tree mortality leads to a greater accumulation of necromass (dead organic matter) that can remain on tropical forest soil for more than 30 years [10]. Necromass plays a key role during this phase of the forest ecosystem, providing food for saproxylic organisms [11,12], habitat for invertebrates and vertebrates [13], integration of forest nutrient cycling [14,15], and storing carbon [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Necromass Carbon Stock in a Secondary Atlantic Forest Fragment in Brazil

Villanova

Torres

Jacovine

et al. 2019

Forests

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Necromass has a relevant role to play in the carbon stock of forest ecosystems, especially with the increase of tree mortality due to climate change. Despite this importance, its quantification is often neglected in tropical forests. The objective of this study was to quantify the carbon storage in a secondary Atlantic Forest fragment in Viçosa, Minas Gerais, Brazil. Coarse Woody Debris (CWD), standing dead trees (snags), and litter were quantified in twenty 10 m x 50 m plots randomly positioned throughout the forest area (simple random sampling). Data were collected during 2015, from July to December. The CWD and snags volumes were determined by the Smalian method and by allometric equations, respectively. The necromass of these components was estimated by multiplying the volume by the apparent density at each decomposition classes. The litter necromass was estimated by the proportionality method and the average of the extrapolated estimates per hectare. The carbon stock of the three components was quantified by multiplying the necromass and the carbon wood content. The total volume of dead wood, including CWD and snag, was 23.6 ± 0.9 m3 ha−1, being produced mainly by the competition for resources, senescence, and anthropic and climatic disturbances. The total necromass was 16.3 ± 0.4 Mg ha−1. The total carbon stock in necromass was 7.3 ± 0.2 MgC ha−1. The CWD, snag and litter stocked 3.0 ± 0.1, 1.8 ± 0.1, and 2.5 ± 0.1 MgC ha−1, respectively. These results demonstrate that although necromass has a lower carbon stock compared to biomass, neglecting its quantification may lead to underestimation of the carbon balance of forest ecosystems and their potential to mitigate climate change.

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“…A homogenized subsample of the soil (disturbed soil sample) was collected at each soil depth and kept in an airtight polythene bag. The soil pits were cleared vertically and two soil cores (undisturbed soil samples) taken horizontally, at two vertical positions along the soil pit, one at each half of each soil depth, using a 100 cm 3 volume corer (height: 51 mm, inner diameter: 50 mm) (Magalhães, 2017; Magalhães & Mamugy, 2020).…”

Section: Methodsmentioning

confidence: 99%

Miombo conversion to monoculture tree plantations: Changes in soil properties

2021

Self Cite

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Monoculture plantations replacing native woodlands are increasingly common globally. In Mozambique, vast miombo* woodlands have been replaced by single‐species plantations. Studies on the effect of replacing native woodlands by single‐species tree plantations on soil properties are abundant; however, those focused specifically on the replacement of miombo and considering a longer time since replacement and covering different growth stages are scarce. This article aimed at assessing the effects of the conversion of miombo to monoculture on soil properties and studying the effect of species planted, plantation age, and rotation on soil capacity to store carbon (C) and nitrogen (N). Plantations established in soils formerly covered by miombo were compared to the remaining original miombo with regard to soil properties. The effect of species planted, plantation age, and rotation on soil properties was examined using the three‐way ANOVA, followed by Tukey's test. Miombo conversion to plantations led to an increase of up to 66% of soil organic C (SOC) and 77% of total N (STN) and a decrease in soil bulk density (BD) of up to 16%. The replacement of the first‐ by second‐rotation plantations led to a decrease of up to 38% in SOC and STN and an increase of up to 32% in BD. BD decreased with plantation age; SOC and STN stocks tended to increase: 60 years after the replacement of miombo by plantations, SOC and STN increased by up to 88%. Changes in soil properties due to the replacement of miombo by monoculture were mainly driven by the species planted. * a sparse open deciduous woodland characteristic of dry parts of eastern Africa

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Carbon stocks in necromass and soil pools of a Mozambican tropical dry forest under different disturbance regimes

Cited by 11 publications

References 27 publications

Effect of charcoal production and woodland type on soil organic carbon and total nitrogen in drylands of southern Mozambique

Effect of charcoal production and woodland type on soil organic carbon and total nitrogen in drylands of southern Mozambique

Necromass Carbon Stock in a Secondary Atlantic Forest Fragment in Brazil

Miombo conversion to monoculture tree plantations: Changes in soil properties

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