Características geológicas de los depósitos de turba en Costa Rica (estudio preliminar).

Cohen, Arthur D.; Raymond, R.; Mora, C Sergio; Alvarado, Alfredo; Malavassi, Luis R.

doi:10.15517/rgac.v0i04.12248

Cited by 2 publications

(7 citation statements)

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“…Bulk density tended to decrease with ber content, like most peats in Costa Rica (Cohen et al 1986) and their values are into the range reported for peatlands of Southeast Asia (Kunarso et al 2022). The reduction of the peat layer bulk density by 49% with respect to the upper layer (0-60 cm) was associated with a higher total C content (Page et al 2011) and lower oxidation of the organic matter as indicated by the absence of the black color in peat.…”

Section: Effect Of Re On Pro Lementioning

confidence: 58%

“…The isotopic shift of 13 C (δ 13 C) throughout the depth pro les showed similar patterns (Online Resource 5, Fig. 4S) and distinct differences between aerobic and anaerobic peat layers.…”

Section: Soil Pro Lesmentioning

confidence: 77%

“…6). The most noticeable differences in d 13 C values between degraded peat, preserved peat, and mineral layers was observed when evaluated against C:N ratios. ).…”

Section: Soil Pro Lesmentioning

confidence: 89%

“…4S) and distinct differences between aerobic and anaerobic peat layers. Soil pro les signal of 13 C from the LRS showed a very stable value (-27.77 ± 0.57‰) from − 85 cm to -200 cm depth (Fig. 6).…”

Section: Soil Pro Lesmentioning

confidence: 95%

“…The highest densities of the upper strata could be due to subsidence, considering that the WT was 60 cm below the peat surface when the re occurred in May The δ 13 C at similar depth pro les might re ect a similar degree of peat degradation (Drollinger et al 2019). Based on the WT and visual depth of black C, the peat cores can be divided into peat layers strongly degraded or ooded conserved, the second ones characterized by a 13 C signal more negative and stable. The increase in the δ 13 C values observed in the upper peat pro le could be due to low WT, especially during re events, that could generate a selective loss of 13 C depleted C as observed by Nykänen et al (2020) in a drained boreal bog.…”

Section: Effect Of Re On Pro Lementioning

confidence: 99%

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Assessment of vegetation and peat soil characteristics of a fire-impacted tropical peatland in Costa Rica

Pérez-Castillo,

Monge-Muñoz,

Durán-Quesada

et al. 2023

Preprint

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Tropical peatlands are highly vulnerable to anthropogenic alterations. In Costa Rica, riverine peatlands are understudied, and most are excluded from the protected areas. Aiming to assess the anthropogenic pressure in the Los Robles sector (LRS) of Medio Queso Wetland (MQW), this study evaluates its changes in vegetation cover, productivity, the topsoil, and soil profile. Fires have prevented the LRS from accumulating carbon (C) in the upper layers. Higher density and ash content; and lower C:N ratio in the dark black layers than the lower peat profile without carbonization, point to recurrent fires with a low water table (WT) for many years. To reduce the damage by fires to C accumulation, urgent measures to prevent prescribed fires, avoiding them specially until the beginning of the rainy season when the WT rise to near soil surface level. The species Eleocharis interstincta promotes higher C stability during the dry season, has a foliage with lower C:N ratio which make it more palatable for livestock and a more recalcitrant composition of the root system that favors peat formation than the temporally dominant Scleria melaleuca. Therefore, conserving E. interstincta could promote the recovery of the peatland functionality in the LRS.

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Section: Effect Of Re On Pro Lementioning

confidence: 58%

“…The isotopic shift of 13 C (δ 13 C) throughout the depth pro les showed similar patterns (Online Resource 5, Fig. 4S) and distinct differences between aerobic and anaerobic peat layers.…”

Section: Soil Pro Lesmentioning

confidence: 77%

“…6). The most noticeable differences in d 13 C values between degraded peat, preserved peat, and mineral layers was observed when evaluated against C:N ratios. ).…”

Section: Soil Pro Lesmentioning

confidence: 89%

Section: Soil Pro Lesmentioning

confidence: 95%

Section: Effect Of Re On Pro Lementioning

confidence: 99%

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Assessment of vegetation and peat soil characteristics of a fire-impacted tropical peatland in Costa Rica

Pérez-Castillo,

Monge-Muñoz,

Durán-Quesada

et al. 2023

Preprint

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Caracterización química y clasificación taxonómica de algunos suelos cultivados con banano en las llanuras aluviales del caribe de Costa Rica

Arias

Mata

Alvarado

et al. 2009

RAC

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Se realizó la caracterización morfológica, química y la clasificación taxonómica de algunos suelos cultivados con banano en las 11 cuencas hidrográficas que confluyen en las llanuras aluviales de la Vertiente Caribe de Costa Rica. Se identificaron 2 sectores con suelos que tienen propiedades morfológicas, químicas, y taxonómicas diferentes. En una zona, se encontraron principalmente Inceptisoles formados a partir de materiales fluvio-volcánicos con propiedades ándicas (Andic Eutrudepts, Aquandic Endoaquepts), Inceptisoles dístricos (Fluventic Dystrudepts) y Andisoles (Typic Hapludands); caracterizados por presentar la mayoría buen drenaje, texturas medias (franco arenosa, franca, franca limosa), una suma de bases entre 10 y 19 cmol.l?1, una CIC entre 13 y 28 cmol.l?1 y carga permanente en la arcillas. En la otra zona, se encontraron principalmente Inceptisoles formados a partir de aluviones de origen sedimentario depositados por inundaciones frecuentes (Fluventic Endoaquepts, Dystric Fluventic Eutrudepts, Fluvaquentic Eutrudepts, Fluvaquentic Endoaquepts), con una suma de bases entre 18 y 46 cmol.l?1, una CIC entre 19 y 46 cmol.l?1, sin propiedades ándicas, texturas finas y moderadamente finas (franco arcillosa, franco arcillosa limosa, arcillosa, arcillosa limosa) y con problemas de drenajes en algunos casos (Endoaquepts, Epiaquepts, Fluvaquentic). Geográficamente, estas zonas fueron separadas por la subcuenca formada por los ríos Vueltas-Silencio-Parismina, de forma que hacia el noroeste se encuentran suelos con influencia volcánica y fertilidad media, y hacia el sureste suelos sin influencia volcánica y de fertilidad alta.

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Características geológicas de los depósitos de turba en Costa Rica (estudio preliminar).

Cited by 2 publications

References 0 publications

Assessment of vegetation and peat soil characteristics of a fire-impacted tropical peatland in Costa Rica

Assessment of vegetation and peat soil characteristics of a fire-impacted tropical peatland in Costa Rica

Caracterización química y clasificación taxonómica de algunos suelos cultivados con banano en las llanuras aluviales del caribe de Costa Rica

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