The role of soil in storing carbon in tropical rainforests: the case of Ankasa Park, Ghana

Chiti, Tommaso; Certini, Giacomo; Grieco, Elisa; Валентини, Р.

doi:10.1007/s11104-009-0265-x

Cited by 30 publications

(18 citation statements)

References 32 publications

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“…As expected, the EF plots had by far the largest soil C stock of all vegetation types which, when extrapolated to 1 m depth equalled the AGB stock of 165 Mg C ha À1 in ANK-01, which is slightly higher than reported in Chiti, Certini, Grieco, and Valentini (2010).…”

Section: Discussionsupporting

confidence: 72%

Forest biomass, productivity and carbon cycling along a rainfall gradient in West Africa

Moore

Adu‐Bredu

Duah-Gyamfi

et al. 2017

Global Change Biology

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Net Primary Productivity (NPP) is one of the most important parameters in describing the functioning of any ecosystem and yet it arguably remains a poorly quantified and understood component of carbon cycling in tropical forests, especially outside of the Americas. We provide the first comprehensive analysis of NPP and its carbon allocation to woody, canopy and root growth components at contrasting lowland West African forests spanning a rainfall gradient. Using a standardized methodology to study evergreen (EF), semi-deciduous (SDF), dry forests (DF) and woody savanna (WS), we find that (i) climate is more closely related with above and belowground C stocks than with NPP (ii) total NPP is highest in the SDF site, then the EF followed by the DF and WS and that (iii) different forest types have distinct carbon allocation patterns whereby SDF allocate in excess of 50% to canopy production and the DF and WS sites allocate 40%-50% to woody production. Furthermore, we find that (iv) compared with canopy and root growth rates the woody growth rate of these forests is a poor proxy for their overall productivity and that (v) residence time is the primary driver in the productivity-allocation-turnover chain for the observed spatial differences in woody, leaf and root biomass across the rainfall gradient. Through a systematic assessment of forest productivity we demonstrate the importance of directly measuring the main components of above and belowground NPP and encourage the establishment of more permanent carbon intensive monitoring plots across the tropics.

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Section: Discussionsupporting

confidence: 72%

Forest biomass, productivity and carbon cycling along a rainfall gradient in West Africa

Moore

Adu‐Bredu

Duah-Gyamfi

et al. 2017

Global Change Biology

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“…The two plots at the wettest end were located in Ankasa National Park, south-western Ghana. This national park has an area of about 500 km 2 , with mean annual precipitation about 2,000 mm, mainly concentrated from March to mid-July and from September to November (Chiti et al, 2010). A dry period extends from December to February.…”

Section: Rainfall Gradient (Ghana)mentioning

confidence: 99%

“…A dry period extends from December to February. Relative humidity is high through the years, ranging from over 90% at night to 75% in the early afternoon (Chiti et al, 2010). The soils are Oxisoils, deeply weathered, highly acidic (3.5-4.0 in pH).…”

Section: Rainfall Gradient (Ghana)mentioning

confidence: 99%

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The Influence of Taxonomy and Environment on Leaf Trait Variation Along Tropical Abiotic Gradients

Oliveras

Bentley

Fyllas

et al. 2020

Front. For. Glob. Change

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Deconstructing functional trait variation and co-variation across a wide range of environmental conditions is necessary to increase the mechanistic understanding of community assembly processes and improve current parameterization of dynamic vegetation models. Here, we present a study that deconstructs leaf trait variation and co-variation into within-species, taxonomic-, and plot-environment components along three tropical environmental gradients in Peru, Brazil, and Ghana. To do so, we measured photosynthetic, chemical, and structural leaf traits using a standardized sampling protocol for more than 1,000 individuals belonging to 367 species. Variation associated with the taxonomic component (species + genus + family) for most traits was relatively consistent across environmental gradients, but within-species variation and plot-environment variation was strongly dependent on the environmental gradient. Trait-trait co-variation was strongly linked to the environmental gradient where traits were measured, although some traits had consistent co-variation components irrespective of gradient. Our results demonstrate that filtering along these tropical gradients is mostly expressed through trait taxonomic variation, but that trait co-variation is strongly dependent on the local environment, and thus global trait co-variation relationships might not always apply at smaller scales and may quickly change under future climate scenarios.

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“…The main characteristics of the soil sampled in uphill and downhill study areas are presented in Table 1. Surface litter C in the hill top area is 15 ± 9 Mg C ha −1 , and a preliminary estimate of the aboveground biomass, including live and dead wood, is 138-170 Mg C ha −1 (Chiti et al, 2010).…”

Section: The Study Sitesmentioning

confidence: 99%

Nitrous oxide emissions from soil of an African rain forest in Ghana

et al. 2013

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Recent atmospheric studies have evidenced the imprint of large N₂O sources in tropical/subtropical lands. This source might be attributed to agricultural areas as well as to natural humid ecosystems. The uncertainty related to both sources is very high, due to the scarcity of data and low frequency of sampling in tropical studies, especially for the African continent. The principal objective of this work was to quantify the annual budget of N₂O emissions in an African tropical rain forest. Soil N₂O emissions were measured over 19 months in Ghana, National Park of Ankasa, in uphill and downhill areas, for a total of 119 days of observation. The calculated annual average emission was 2.33 ± 0.20 kg N-N₂O ha⁻¹ yr⁻¹, taking into account the proportion of uphill vs. downhill areas, the latter being characterized by lower N₂O emissions. N₂O fluxes peaked between June and August and were significantly correlated with soil respiration on a daily and monthly basis. No clear correlation was found in the uphill area between N₂O fluxes and soil water content or rain, whereas in the downhill area soil water content concurred with soil respiration in determining N₂O flux variability. The N₂O source strength calculated in this study is very close to those reported for the other two available studies in African rain forests and to the estimated mean derived from worldwide studies in humid tropical forests (2.81 ± 2.02 kg N-N₂O ha⁻¹ yr⁻¹)

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The role of soil in storing carbon in tropical rainforests: the case of Ankasa Park, Ghana

Cited by 30 publications

References 32 publications

Forest biomass, productivity and carbon cycling along a rainfall gradient in West Africa

Forest biomass, productivity and carbon cycling along a rainfall gradient in West Africa

The Influence of Taxonomy and Environment on Leaf Trait Variation Along Tropical Abiotic Gradients

Nitrous oxide emissions from soil of an African rain forest in Ghana

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