Recovery of above-ground tree biomass after moderate selective logging in a central Amazonian forest

Otani, Toshio; Lima, Adriano José Nogueira; Suwa, Rempei; Amaral, Márcio Rogério Mota; Ohashi, Shinta; Pinto, Alberto Carlos Martins; Santos, Joaquim dos; Kajimoto, Tetsuya; Higuchi, Níro; Ishizuka, Moriyoshi

doi:10.3832/ifor2534-011

Cited by 8 publications

(3 citation statements)

References 42 publications

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“…Furthermore, in many tropical regions, otherwise “mature” forests that have never been cleared or converted to pasture/agriculture are nevertheless subject to selective cutting practices. Such small-scale disturbances can represent a large net source of CO 2 16 but also result in vigorous regrowth 17 .…”

Section: Introductionmentioning

confidence: 99%

Symbiotic N fixation is sufficient to support net aboveground biomass accumulation in a humid tropical forest

Brookshire

Wurzburger

Currey

et al. 2019

Sci Rep

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Symbiotic nitrogen (N) fixation has been shown to support carbon storage in young regenerating tropical forests, but N-fixing trees can also be strong competitors with non-fixing trees, making it unclear which mechanism drives long term patterns in biomass accretion. Many tropical forests have excess N, but factors such as rising atmospheric CO 2 or selective cutting practices might induce additional N demand. Here we combine decades of stem inventory data, in-situ measures of symbiotic N fixation, and simulations of N demand to evaluate demographic and biogeochemical controls on biomass dynamics in legume-rich lowland forests of Trinidad. We document sustained net biomass accumulation and high rates of N fixation in these forests, regardless of the timing of selective timber harvests, including an old growth stand. The biomass accumulation was explained by growth of non-fixing trees, not N-fixing trees, but the total amount of symbiotic N fixation was sufficient to account for most of net above ground N demands, suggesting that N-fixers could contribute to the long-term C sink in these forests via fertilizing non-fixers.

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Section: Introductionmentioning

confidence: 99%

Symbiotic N fixation is sufficient to support net aboveground biomass accumulation in a humid tropical forest

Brookshire

Wurzburger

Currey

et al. 2019

Sci Rep

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“…Unlike other forms of land use practiced in the Amazon and other tropical regions, SFM is currently thought to be one of the best alternatives for the sustainable use of forest resources. In addition to generating social and economic benefits, SFM contributes to the maintenance and guarantee of forest stocking, conservation of biodiversity, removal of carbon dioxide from the atmosphere and contributes to land use planning [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Dynamics of Tropical Forest Twenty-Five Years after Experimental Logging in Central Amazon Mature Forest

Amaral

Lima

Higuchi

et al. 2019

Forests

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Long-term studies of the dynamics of managed forests in tropical regions are lacking. This study aimed to evaluate the dynamics of a tropical forest, over a 25-year period, that was experimentally logged in 1987 and 1988 and submitted to three different cutting intensities. All trees with diameter at breast height (DBH) ≥ 10 cm have been measured annually since 1990. The three logging intensities that were applied were: light (T1)-trees harvested with DBH ≥ 55 cm; medium (T2)-DBH ≥ 50 cm; and heavy (T3)-DBH ≥ 40 cm. Control plots (T0) were also monitored. The highest mean annual mortality rates (1.82% ± 0.38), recruitment rates (2.93% ± 0.77) and diameter increments (0.30 ± 0.02 cm) occurred in the T3 treatment. Shifts in dynamics of the forest were mainly caused by a striking increase in a fast-growing pioneer species and their high mortality rates. The loss in stocking caused by mortality was greater than to that of replacement by recruitment. The results demonstrated that selective logging altered the natural dynamics of the forest through increased: mortality rates, recruitment and growth rates of the residual trees.

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“…We first characterized potential dependencies of E S on stem growth rates in forests north of Manaus, Brazil, using data from a selective logging experiment (BIONTE). BIONTE (the BIOmass and NuTrient Experiment) (S2º 38' 17", W60º 09' 25") is a long-running study of forest response to experimental logging carried out in forests north of Manaus along the ZF-2 road, and managed by scientists at Brazil's National Institute for Amazon Research (Instituto Nacional de Pesquisa da Amazônia -INPA) (Otani et al 2018). The experiment consists of three blocks of 24 ha forest, with treatment replicated in each block, for a total of three replicates per treatment.…”

Section: Monthly Observations Of Stem Growth and Co 2 Efflux In The B...mentioning

confidence: 99%

Stem respiration and growth in a central Amazon rainforest

Jardine

Cobello

Teixeira

et al. 2022

Trees

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Tropical forests cycle a large amount of CO 2 between the land and atmosphere, with a substantial portion of the return flux due tree respiratory processes. However, in situ estimates of woody tissue respiratory fluxes and carbon use efficiencies (CUE W ) and their dependencies on physiological processes including stem wood production (P w ) and transpiration in tropical forests remain scarce. Here, we synthesize monthly P w and daytime stem CO 2 efflux (E S ) measurements over one year from 80 trees with variable biomass accumulation rates in the central Amazon. On average, carbon flux to woody tissues, expressed in the same stem area normalized units as E S , averaged 0.90 ± 1.2 µmol m -2 s -1 for P w , and 0.55 ± 0.33 µmol m -2 s -1 for daytime E S . A positive linear correlation was found between stem growth rates and stem CO 2 efflux, with respiratory carbon loss equivalent to 15 ± 3% of stem carbon accrual. CUE W of stems was non-linearly correlated with growth and was as high as 77-87% for a fastgrowing tree. Diurnal measurements of stem CO 2 efflux for three individuals showed a daytime reduction of E S by 15-50% during periods of high sap flow and transpiration. The results demonstrate that high daytime E S fluxes are associated with high CUE W during fast tree growth, reaching higher values than previously observed in the Amazon Basin (e.g. maximum CUE W up to 77-87%, versus 30-56%). The observations are consistent with the emerging view that diurnal dynamics of stem water status influences growth processes and associated respiratory metabolism.

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Recovery of above-ground tree biomass after moderate selective logging in a central Amazonian forest

Cited by 8 publications

References 42 publications

Symbiotic N fixation is sufficient to support net aboveground biomass accumulation in a humid tropical forest

Symbiotic N fixation is sufficient to support net aboveground biomass accumulation in a humid tropical forest

Dynamics of Tropical Forest Twenty-Five Years after Experimental Logging in Central Amazon Mature Forest

Stem respiration and growth in a central Amazon rainforest

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