The effect of tree mortality on CO2 fluxes in an old-growth spruce forest

Карелин, Д. В.; Zamolodchikov, D. G.; Shilkin, A. V.; Popov, S. Yu.; Kumanyaev, A. S.; Gerenyu, V. O. Lopes de; Telnova, Natalia; Gitarskiy, M. L.

doi:10.1007/s10342-020-01330-3

Cited by 20 publications

(9 citation statements)

References 41 publications

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Section: Ecosystem-atmosphere Co2 Exchange In the Spruce Forestsmentioning

confidence: 93%

“…However, many other mixed spruce stands have significant annual CO2 uptake rates. For example, an old spruce forest near Valday Lake (Novgorodskaya oblast, Russia), located 170 km north of the study site, was found to be a CO2 sink, with an annual NEE ranging between (−300 and −95 gC•m −2 [45] in the 2010-2018 period. Eddy covariance flux measurements in the 2015-2020 period showed that a southern taiga nemorose spruce forest was a CO 2 sink or source for the atmosphere depending on the GPP/TER ratio, which was controlled by the environmental conditions of the particular year.…”

Section: Ecosystem-atmosphere Co2 Exchange In the Spruce Forestsmentioning

confidence: 94%

“…However, the southern taiga forest ecosystems in European Russia are vulnerable to climate change due to the high warming rates in the region [42]. Moreover, the ecosystem-atmosphere exchange in the boreal forests of European Russia remains poorly investigated, and the observational data of the ecosystem CO 2 fluxes reported in the scientific literature are very sparse, e.g., Kurbatova et al [43], Zagirova et al [44], and Karelin et al [45].…”

Section: Introductionmentioning

confidence: 99%

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Response of Spruce Forest Ecosystem CO2 Fluxes to Inter-Annual Climate Anomalies in the Southern Taiga

Mamkin

Varlagin

Yaseneva

et al. 2022

Forests

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Climate extremes and anomalies modify the CO2 ecosystem–atmosphere exchange of the boreal forests and consequently alter the terrestrial carbon stocks and the atmospheric greenhouse gas concentrations. The effects of the anomalous weather conditions on the CO2 net ecosystem exchange (NEE), total ecosystem respiration (TER), and gross primary production (GPP) of the typical southern taiga nemorose spruce forest were analyzed using continuous eddy covariance flux measurements in the 2015–2020 period. The forest was found to be a source of atmospheric CO2 in 2016, 2017, 2019, and 2020 (the mean annual GPP/TER ratio was between 0.87 and 0.97). In 2018, the forest was found to act as a CO2 sink (GPP/TER = 1.47) when a positive temperature anomaly in the growing season was accompanied by a negative precipitation anomaly and increased global radiation. The early start of the CO2 uptake in the anomalously warm winter of 2019/2020 did not result in an increase in the annual GPP/TER ratio (0.90). The comparison of the flux data obtained from the nemorose spruce forest on the well-drained soils with the data obtained from paludified spruce forest in the same landscape showed that the mean annual GPP/TER ratio of the sites alternatively responded to the mentioned anomalies. This study suggests that a variety of soil moisture regimes across the southern taiga spruce forests provide a non-uniformity in the response reactions of the CO2 ecosystem–atmosphere exchange on the climate anomalies.

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Section: Ecosystem-atmosphere Co2 Exchange In the Spruce Forestsmentioning

confidence: 93%

Section: Ecosystem-atmosphere Co2 Exchange In the Spruce Forestsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

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Response of Spruce Forest Ecosystem CO2 Fluxes to Inter-Annual Climate Anomalies in the Southern Taiga

Mamkin

Varlagin

Yaseneva

et al. 2022

Forests

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“…Forest vegetation carbon storage is the main body of terrestrial ecosystem carbon storage, which not only maintains a huge carbon pool of (550 ± 100) Pg (1 Pg = 1015 g), but also absorbs about 33% of the carbon emitted by human activities, playing a very important role in global carbon balance and potential carbon storage [1,2]. Since changes in forest vegetation carbon sequestration function reflects forest succession, human activities and environmental changes, it is an important indicator to measure the stability and health of the forest ecosystem; as such, the study of vegetation carbon storage becomes an important field of forest carbon storage research [3,4]. Scholars from Russia, Canada, the United States, China and other countries have studied regional or even global forest vegetation carbon storage and forest carbon cycles [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Effects of Stand Structure and Topography on Forest Vegetation Carbon Density in Jiangxi Province

Changshun

Deng

Liu

et al. 2021

Forests

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Stand structure and topography are important factors affecting forest vegetation carbon density (FVCD). Revealing the interaction mechanisms between stand structure and topography on FVCD is of great significance for enhancing forest vegetation carbon storage and achieving regional carbon neutrality. Based on stratified sampling, systematic distribution and forest continuous inventory sample plots in Jiangxi province, the variation characteristics of FVCD and its correlations with stand structure and topographic factors were studied. The results are as follows: (1) The average FVCD in Jiangxi province was 44.23 Mg/ha, which was dominated by the carbon density of the arbor layer, accounting for about 81.39% of the total forest—far lower than the average level of global FVCD, which proved that the forest in Jiangxi province was dominated by middle-age and young forests with low carbon density, and also showed that the potential for forest vegetation carbon storage in Jiangxi province was huge. (2) Except for vegetation carbon densities of shrub and herb layers, the vegetation carbon densities of other forest layers in Jiangxi province were significantly different among different forest types. Volume per unit area was the most important factor affecting the vegetation carbon densities of arbor and total forest, and vegetation carbon density–volume models of the main forests were built for vegetation carbon density calculation in Jiangxi province. (3) The vegetation carbon densities of arbor layer, snag and log layer, and total forest increased significantly with increases in elevation and slope. Except for the shrub layer and herb layer, the vegetation carbon densities of the other layers and the total forest had extremely significant or significant differences between slope position gradients—indicating that the effect of topography on FVCD in Jiangxi province was significant, mainly through influencing of forest distribution and human disturbance intensity.

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“…The latter is particularly important under conditions of ongoing warming, increasing frequency of droughts and storm events in Russia (Zolotokrylin et al 2007; The second Roshydromet assessment 2014; Kurganova et al 2020;Leskinen et al 2020). In forests, the most significant are sporadic soil CO 2 emission and C-balance drivers associated with tree stand mortality caused by fires, logging and phytophages (Leskinen et al 2020;Karelin et al 2020b).…”

Section: Introductionmentioning

confidence: 99%

Contribution Analysis Of Permanent And Sporadic Controls Of Co2 Efflux From Chernozems Over Four Seasons

Карелин

Суховеева

2021

GES

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We analyzed four years field observations (2017–2020) of soil CO2 efflux from Chernozems of arable and foreststeppe ecosystems of Kursk region (Russia), which correspond to the period of the maximal current warming. Three wellknown simulation models of different structure and variable sets (DNDC, RothC, T&P) and nonparametric regression analysis were used to estimate annual CO2 emission from soil and contributions of constant and sporadic controls. The applied models satisfactorily predict both the rate of annual soil CO2 emission and its seasonal dynamics on arable Chernozems. However, while RothC is suitable for the whole set of crops considered, DNDC is most suitable for cereals and T&R for bare soils only. A comparison of the contributions of permanent and sporadic factors to soil respiration showed that on an inter-annual scale soil temperature and moisture are less important than yearly crop rotation in Chernozem plowlands, making the latter the most important predictor apart from general land-use type. Although the combination of significant permanent and sporadic factors is able to explain 41% of the soil CO2 emission variance, the leading involvement of spatial controls prevents the construction of quantitative regression models that are able to make forecasts, requiring the use of more sophisticated simulation models (i.e. RothC) in this case. However, the use of the latter does not yet solve the problem of predicting soil CO2 emission and its net balance in forest-covered or steppe areas of Chernozem forest-steppe landscape.

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The effect of tree mortality on CO2 fluxes in an old-growth spruce forest

Cited by 20 publications

References 41 publications

Response of Spruce Forest Ecosystem CO2 Fluxes to Inter-Annual Climate Anomalies in the Southern Taiga

Response of Spruce Forest Ecosystem CO2 Fluxes to Inter-Annual Climate Anomalies in the Southern Taiga

Effects of Stand Structure and Topography on Forest Vegetation Carbon Density in Jiangxi Province

Contribution Analysis Of Permanent And Sporadic Controls Of Co2 Efflux From Chernozems Over Four Seasons

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