scholarly journals Influence of different tree species on autotrophic and heterotrophic soil respiration in a mined area under reclamation

2021 ◽  
Author(s):  
F. D. A. Valente ◽  
L. C. Gomes ◽  
M. F. Castro ◽  
J. C. L. Neves ◽  
I. R. Silva ◽  
...  
Keyword(s):  
Soil Respiration ◽  
Tree Species ◽  
Heterotrophic Soil Respiration

scholarly journals Does soil moisture overrule temperature dependency of soil respiration in Mediterranean riparian forests?

2014 ◽  
Vol 11 (6) ◽  
pp. 7991-8022 ◽  
Author(s):  
C.-T. Chang ◽  
S. Sabaté ◽  
D. Sperlich ◽  
S. Poblador ◽  
F. Sabater ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Soil Respiration ◽  
Soil Temperature ◽  
Groundwater Level ◽  
Tree Species ◽  
Riparian Forest ◽  
Co2 Flux ◽  
Control Factor ◽  
Primary Control ◽  
Heterotrophic Soil Respiration

Abstract. Soil respiration (SR) is a major component of ecosystem's carbon cycle and represents the second largest CO2 flux of the terrestrial biosphere. Soil temperature is considered to be the primary control on SR whereas soil moisture as the secondary control factor. However, soil moisture can become the dominant control on SR in very wet or dry conditions. Determining the trigger that switches-on soil moisture as the primary control factor of SR will provide a deeper understanding on how SR changes under projected future increased droughts. Specific objectives of this study were (1) to investigate the seasonal variations and the relationship between SR and both soil temperature and moisture in a Mediterranean riparian forest along a groundwater level gradient; (2) to determine soil moisture thresholds at which SR is rather controlled by soil moisture than by temperature; (3) to compare SR responses under different tree species present in a Mediterranean riparian forest (Alnus, glutinosa, Populus nigra and Fraxinus excelsior). Results showed that the heterotrophic soil respiration rate, groundwater level and 30 cm integral soil moisture (SM30) decreased significantly from riverside to uphill and showed a pronounced seasonality. SR rates showed significant differences among tree species, with higher SR for P. nigra and lower SR for A. glutinosa. The lower threshold of soil moisture was 20 and 17% for heterotrophic and total SR respectively. Daily mean SR rate was positively correlated with soil temperature when soil moisture exceeded the threshold, with Q10 values ranging from 1.19 to 2.14; nevertheless, SR became decoupled from soil temperature when soil moisture dropped below these thresholds.

scholarly journals Does soil moisture overrule temperature dependence of soil respiration in Mediterranean riparian forests?

2014 ◽  
Vol 11 (21) ◽  
pp. 6173-6185 ◽  
Author(s):  
C. T. Chang ◽  
S. Sabaté ◽  
D. Sperlich ◽  
S. Poblador ◽  
F. Sabater ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Soil Respiration ◽  
Soil Temperature ◽  
Groundwater Level ◽  
Tree Species ◽  
Riparian Forest ◽  
Co2 Flux ◽  
Control Factor ◽  
Primary Control ◽  
Heterotrophic Soil Respiration

Abstract. Soil respiration (SR) is a major component of ecosystems' carbon cycles and represents the second largest CO2 flux in the terrestrial biosphere. Soil temperature is considered to be the primary abiotic control on SR, whereas soil moisture is the secondary control factor. However, soil moisture can become the dominant control on SR in very wet or dry conditions. Determining the trigger that makes soil moisture as the primary control factor of SR will provide a deeper understanding on how SR changes under the projected future increase in droughts. Specific objectives of this study were (1) to investigate the seasonal variations and the relationship between SR and both soil temperature and moisture in a Mediterranean riparian forest along a groundwater level gradient; (2) to determine soil moisture thresholds at which SR is controlled by soil moisture rather than by temperature; (3) to compare SR responses under different tree species present in a Mediterranean riparian forest (Alnus glutinosa, Populus nigra and Fraxinus excelsior). Results showed that the heterotrophic soil respiration rate, groundwater level and 30 cm integral soil moisture (SM30) decreased significantly from the riverside moving uphill and showed a pronounced seasonality. SR rates showed significant differences between tree species, with higher SR for P. nigra and lower SR for A. glutinosa. The lower threshold of soil moisture was 20 and 17% for heterotrophic and total SR, respectively. Daily mean SR rate was positively correlated with soil temperature when soil moisture exceeded the threshold, with Q10 values ranging from 1.19 to 2.14; nevertheless, SR became decoupled from soil temperature when soil moisture dropped below these thresholds.

scholarly journals Influence of different tree species on autotrophic and heterotrophic soil respiration in a mined area under reclamation

2020 ◽  
Author(s):  
Fernanda Valente ◽  
Marllon Castro ◽  
Lucas Gomes ◽  
Julio Cesar Neves ◽  
IVO Silva ◽  
...  
Keyword(s):  
Soil Respiration ◽  
Tree Species ◽  
Management Practices ◽  
Soil Co2 Efflux ◽  
Native Forest ◽  
Co2 Efflux ◽  
Soil Co2 ◽  
Forest Species ◽  
Total Soil ◽  
Heterotrophic Soil Respiration

Planting trees is one of the most effective activities in recovering soil organic carbon (SOC) stocks of degraded areas, but we still lack information on how different tree species can influence soil respiration, one of the main sources of dioxide carbon (CO2) to the atmosphere. This study aimed to explore the influence of different forest species on the autotrophic and heterotrophic components of the total soil respiration in a bauxite mining area under reclamation. We analysed the soil CO2 efflux under five treatments: i) monoculture of clonal Eucalyptus; ii) monoculture of Anadenanthera peregrina (L.); iii) a mixed plantation of 16 native forest species (Nat); iv) a mined area without vegetation cover; and v) a natural forest cover. This design allowed exploring the soil CO2 dynamics in a gradient of recovery, from a degraded area to natural vegetation. Additionally, we measured soil temperature, moisture and soil characteristics. Soil CO2 efflux increased with increasing forest species cover in the rainy months. There was no significant change in CO2 efflux among the tree species. Heterotrophic soil respiration contributed to 64% of total soil CO2 efflux and was associated with litter decomposition. Amongst the abiotic variables, increases in soil moisture had the most influence on CO2 efflux. Therefore, these results help to understand the factors that underpin the loss of SOC and can orient management practices to improve soil organic matter and restore soil quality in degraded areas.

scholarly journals Total and heterotrophic soil respiration in a swamp forest and oil palm plantations on peat in Central Kalimantan, Indonesia

2017 ◽  
Vol 135 (3) ◽  
pp. 203-220 ◽  
Author(s):  
Kristell Hergoualc’h ◽  
Dede T. Hendry ◽  
Daniel Murdiyarso ◽  
Louis Vincent Verchot
Keyword(s):  
Soil Respiration ◽  
Oil Palm ◽  
Swamp Forest ◽  
Central Kalimantan ◽  
Heterotrophic Soil Respiration

scholarly journals Litter Traits of Native and Non-Native Tropical Trees Influence Soil Carbon Dynamics in Timber Plantations in Panama

Forests ◽  
2019 ◽  
Vol 10 (3) ◽  
pp. 209 ◽  
Author(s):  
Deirdre Kerdraon ◽  
Julia Drewer ◽  
Biancolini Castro ◽  
Abby Wallwork ◽  
Jefferson Hall ◽  
...  
Keyword(s):  
Soil Respiration ◽  
Soil Carbon ◽  
Tree Species ◽  
Carbon Dynamics ◽  
Additive Effects ◽  
Soil C ◽  
Soil Carbon Dynamics ◽  
Litter Mixtures ◽  
Native Tree ◽  
Native Tree Species

Tropical reforestation initiatives are widely recognized as a key strategy for mitigating rising atmospheric CO2 concentrations. Although rapid tree growth in young secondary forests and plantations sequesters large amounts of carbon (C) in biomass, the choice of tree species for reforestation projects is crucial, as species identity and diversity affect microbial activity and soil C cycling via plant litter inputs. The decay rate of litter is largely determined by its chemical and physical properties, and trait complementarity of diverse litter mixtures can produce non-additive effects, which facilitate or delay decomposition. Furthermore, microbial communities may preferentially decompose litter from native tree species (homefield advantage). Hence, information on how different tree species influence soil carbon dynamics could inform reforestation efforts to maximize soil C storage. We established a decomposition experiment in Panama, Central America, using mesocosms and litterbags in monoculture plantations of native species (Dalbergia retusa Hemsl. and Terminalia amazonia J.F.Gmel., Exell) or teak (Tectona grandis L.f.) to assess the influence of different litter types and litter mixtures on soil C dynamics. We used reciprocal litter transplant experiments to assess the homefield advantage and litter mixtures to determine facilitative or antagonistic effects on decomposition rates and soil respiration in all plantation types. Although litter properties explained some of the variation in decomposition, the microclimate and soil properties in the plantations also played an important role. Microbial biomass C and litter decomposition were lower in Tectona than in the native plantations. We observed non-additive effects of mixtures with Tectona and Dalbergia litter on both decomposition and soil respiration, but the effect depended on plantation type. Further, there was a homefield disadvantage for soil respiration in Tectona and Terminalia plantations. Our results suggest that tree species diversity plays an important role in the resilience of tropical soils and that plantations with native tree species could help maintain key processes involved in soil carbon sequestration.

Relationships among litterfall, fine-root growth, and soil respiration for five tropical tree species

2007 ◽  
Vol 37 (10) ◽  
pp. 1954-1965 ◽  
Author(s):  
Oscar J. Valverde-Barrantes
Keyword(s):  
Soil Respiration ◽  
Root Growth ◽  
Tree Species ◽  
Fine Root ◽  
Tropical Tree ◽  
Root Production ◽  
Fine Root Production ◽  
Soil C ◽  
Tropical Tree Species ◽  
Fine Root Growth

Although significant advances have been made in understanding terrestrial carbon cycling, there is still a large uncertainty about the variability of carbon (C) fluxes at local scales. Using a carbon mass-balance approach, I investigated the relationships between fine detritus production and soil respiration for five tropical tree species established on 16-year-old plantations. Total fine detritus production ranged from 0.69 to 1.21 kg C·m–2·year–1 with significant differences among species but with no correlation between litterfall and fine-root growth. Soil CO2 emissions ranged from 1.61 to 2.36 kg C·m–2·year–1 with no significant differences among species. Soil respiration increased with fine-root production but not with litterfall, suggesting that soil C emissions may depend more on belowground inputs or that both fine root production and soil respiration are similarly influenced by an external factor. Estimates of root + rhizosphere respiration comprised 52% of total soil respiration on average, and there was no evidence that rhizosphere respiration was associated with fine-root growth rates among species. These results suggest that inherent differences in fine-root production among species, rather than differences in aboveground litterfall, might play a main role explaining local-scale, among-forest variations in soil C emissions.

Sign in / Sign up

Export Citation Format

Share Document