scholarly journals Consistent Effects of Canopy vs. Understory Nitrogen Addition on Soil Respiration and Net Ecosystem Production in Moso Bamboo Forests

Forests ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 1427
Author(s):  
Chunju Cai ◽  
Zhihan Yang ◽  
Liang Liu ◽  
Yunsen Lai ◽  
Junjie Lei ◽  
...  
Keyword(s):  
Soil Respiration ◽  
Carbon Cycling ◽  
Forest Canopy ◽  
Carbon Sink ◽  
N Deposition ◽  
Net Ecosystem Production ◽  
Moso Bamboo ◽  
Atmospheric N Deposition ◽  
Ecosystem Carbon ◽  
Ecosystem Production

Nitrogen (N) deposition has been well documented to cause substantial impacts on ecosystem carbon cycling. However, the majority studies of stimulating N deposition by direct N addition to forest floor have neglected some key ecological processes in forest canopy (e.g., N retention and absorption) and might not fully represent realistic atmospheric N deposition and its effects on ecosystem carbon cycling. In this study, we stimulated both canopy and understory N deposition (50 and 100 kg N ha−1 year−1) with a local atmospheric NHx:NOy ratio of 2.08:1, aiming to assess whether canopy and understory N deposition had similar effects on soil respiration (RS) and net ecosystem production (NEP) in Moso bamboo forests. Results showed that RS, soil autotrophic (RA), and heterotrophic respiration (RH) were 2971 ± 597, 1472 ± 579, and 1499 ± 56 g CO2 m−2 year−1 for sites without N deposition (CN0), respectively. Canopy and understory N deposition did not significantly affect RS, RA, and RH, and the effects of canopy and understory N deposition on these soil fluxes were similar. NEP was 1940 ± 826 g CO2 m−2 year−1 for CN0, which was a carbon sink, indicating that Moso bamboo forest the potential to play an important role alleviating global climate change. Meanwhile, the effects of canopy and understory N deposition on NEP were similar. These findings did not support the previous predictions postulating that understory N deposition would overestimate the effects of N deposition on carbon cycling. However, due to the limitation of short duration of N deposition, an increase in the duration of N deposition manipulation is urgent and essential to enhance our understanding of the role of canopy processes in ecosystem carbon fluxes in the future.

Soil respiration and net ecosystem production in relation to intensive management in Moso bamboo forests

CATENA ◽  
2016 ◽  
Vol 137 ◽  
pp. 219-228 ◽  
Author(s):  
Xiaolu Tang ◽  
Shaohui Fan ◽  
Lianghua Qi ◽  
Fengying Guan ◽  
Manyi Du ◽  
...  
Keyword(s):  
Soil Respiration ◽  
Net Ecosystem Production ◽  
Moso Bamboo ◽  
Intensive Management ◽  
Ecosystem Production

scholarly journals Land Cover and Land Use Change Decreases Net Ecosystem Production in Tropical Peatlands of West Kalimantan, Indonesia

Forests ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1587
Author(s):  
Imam Basuki ◽  
J. Boone Kauffman ◽  
James T. Peterson ◽  
Gusti Z. Anshari ◽  
Daniel Murdiyarso
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Soil Respiration ◽  
Primary Production ◽  
Oil Palm ◽  
Net Primary Production ◽  
Net Ecosystem Production ◽  
Carbon Sinks ◽  
Peat Swamp ◽  
Ecosystem Production

Deforested and converted tropical peat swamp forests are susceptible to fires and are a major source of greenhouse gas (GHG) emissions. However, information on the influence of land-use change (LUC) on the carbon dynamics in these disturbed peat forests is limited. This study aimed to quantify soil respiration (heterotrophic and autotrophic), net primary production (NPP), and net ecosystem production (NEP) in peat swamp forests, partially logged forests, early seral grasslands (deforested peat), and smallholder-oil palm estates (converted peat). Peat swamp forests (PSF) showed similar soil respiration with logged forests (LPSF) and oil palm (OP) estates (37.7 Mg CO2 ha−1 yr−1, 40.7 Mg CO2 ha−1 yr−1, and 38.7 Mg CO2 ha−1 yr−1, respectively), but higher than early seral (ES) grassland sites (30.7 Mg CO2 ha−1 yr−1). NPP of intact peat forests (13.2 Mg C ha−1 yr−1) was significantly greater than LPSF (11.1 Mg C ha−1 yr−1), ES (10.8 Mg C ha−1 yr−1), and OP (3.7 Mg C ha−1 yr−1). Peat swamp forests and seral grasslands were net carbon sinks (10.8 Mg CO2 ha−1 yr−1 and 9.1 CO2 ha−1 yr−1, respectively). In contrast, logged forests and oil palm estates were net carbon sources; they had negative mean Net Ecosystem Production (NEP) values (−0.1 Mg CO2 ha−1 yr−1 and −25.1 Mg CO2 ha−1 yr−1, respectively). The shift from carbon sinks to sources associated with land-use change was principally due to a decreased Net Primary Production (NPP) rather than increased soil respiration. Conservation of the remaining peat swamp forests and rehabilitation of deforested peatlands are crucial in GHG emission reduction programs.

Decadal trends in net ecosystem production and net ecosystem carbon balance for a regional socioecological system

2011 ◽  
Vol 262 (7) ◽  
pp. 1318-1325 ◽  
Author(s):  
David P. Turner ◽  
William D. Ritts ◽  
Zhiqiang Yang ◽  
Robert E. Kennedy ◽  
Warren B. Cohen ◽  
...  
Keyword(s):  
Carbon Balance ◽  
Net Ecosystem Production ◽  
Ecosystem Carbon ◽  
Ecosystem Carbon Balance ◽  
Ecosystem Production ◽  
Net Ecosystem Carbon Balance

Soil respiration and net ecosystem production in an onion field in Central Hokkaido, Japan

2004 ◽  
Vol 50 (1) ◽  
pp. 27-33 ◽  
Author(s):  
Ronggui Hu ◽  
Ryusuke Hatano ◽  
Kanako Kusa ◽  
Takuji Sawamoto
Keyword(s):  
Soil Respiration ◽  
Net Ecosystem Production ◽  
Ecosystem Production

scholarly journals Management scheme influence and nitrogen addition effects on soil CO2, CH4, and N2O fluxes in a Moso bamboo plantation

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Junbo Zhang ◽  
Quan Li ◽  
Jianhua Lv ◽  
Changhui Peng ◽  
Zhikang Gu ◽  
...  
Keyword(s):  
Global Warming ◽  
Microbial Biomass Carbon ◽  
Ghg Emissions ◽  
Nitrogen Addition ◽  
N Deposition ◽  
Moso Bamboo ◽  
Atmospheric N Deposition ◽  
Soil Microbial ◽  
Management Scheme ◽  
Set Up

Abstract Background It is still not clear whether the effects of N deposition on soil greenhouse gas (GHG) emissions are influenced by plantation management schemes. A field experiment was conducted to investigate the effects of conventional management (CM) versus intensive management (IM), in combination with simulated N deposition levels of control (ambient N deposition), 30 kg N·ha− 1·year− 1 (N30, ambient + 30 kg N·ha− 1·year− 1), 60 kg N·ha− 1·year− 1 (N60, ambient + 60 kg N·ha− 1·year− 1), or 90 kg N·ha− 1·year− 1 (N90, ambient + 90 kg N·ha− 1·year− 1) on soil CO2, CH4, and N2O fluxes. For this, 24 plots were set up in a Moso bamboo (Phyllostachys edulis) plantation from January 2013 to December 2015. Gas samples were collected monthly from January 2015 to December 2015. Results Compared with CM, IM significantly increased soil CO2 emissions and their temperature sensitivity (Q10) but had no significant effects on soil CH4 uptake or N2O emissions. In the CM plots, N30 and N60 significantly increased soil CO2 emissions, while N60 and N90 significantly increased soil N2O emissions. In the IM plots, N30 and N60 significantly increased soil CO2 and N2O emissions, while N60 and N90 significantly decreased soil CH4 uptake. Overall, in both CM and IM plots, N30 and N60 significantly increased global warming potentials, whereas N90 did not significantly affect global warming potential. However, N addition significantly decreased the Q10 value of soil CO2 emissions under IM but not under CM. Soil microbial biomass carbon was significantly and positively correlated with soil CO2 and N2O emissions but significantly and negatively correlated with soil CH4 uptake. Conclusion Our results indicate that management scheme effects should be considered when assessing the effect of atmospheric N deposition on GHG emissions in bamboo plantations.

scholarly journals Subalpine grassland productivity increased with warmer and drier conditions, but not with higher N deposition, in an altitudinal transplantation experiment

2021 ◽  
Vol 18 (6) ◽  
pp. 2075-2090
Author(s):  
Matthias Volk ◽  
Matthias Suter ◽  
Anne-Lena Wahl ◽  
Seraina Bassin
Keyword(s):  
Soil Moisture ◽  
Global Change ◽  
Temperature Change ◽  
Altitudinal Gradient ◽  
Carbon Sink ◽  
Irrigation Treatment ◽  
N Deposition ◽  
Yield Response ◽  
Atmospheric N Deposition ◽  
Common Location

Abstract. Multiple global change drivers affect plant productivity of grasslands and thus ecosystem services like forage production and the soil carbon sink. Subalpine grasslands seem particularly affected and may serve as a proxy for the cold, continental grasslands of the Northern Hemisphere. Here, we conducted a 4-year field experiment (AlpGrass) with 216 turf monoliths, subjected to three global change drivers: warming, moisture, and N deposition. Monoliths from six different subalpine pastures were transplanted to a common location with six climate scenario sites (CSs). CSs were located along an altitudinal gradient from 2360 to 1680 m a.s.l., representing an April–October mean temperature change of −1.4 to +3.0 ∘C, compared to CSreference with no temperature change and with climate conditions comparable to the sites of origin. To uncouple temperature effects along the altitudinal gradient from soil moisture and soil fertility effects, an irrigation treatment (+12 %–21 % of ambient precipitation) and an N-deposition treatment (+3 kg and +15 kg N ha−1 a−1) were applied in a factorial design, the latter simulating a fertilizing air pollution effect. Moderate warming led to increased productivity. Across the 4-year experimental period, the mean annual yield peaked at intermediate CSs (+43 % at +0.7 ∘C and +44 % at +1.8 ∘C), coinciding with ca. 50 % of days with less than 40 % soil moisture during the growing season. The yield increase was smaller at the lowest, warmest CS (+3.0 ∘C) but was still 12 % larger than at CSreference. These yield differences among CSs were well explained by differences in soil moisture and received thermal energy. Irrigation had a significant effect on yield (+16 %–19 %) in dry years, whereas atmospheric N deposition did not result in a significant yield response. We conclude that productivity of semi-natural, highly diverse subalpine grassland will increase in the near future. Despite increasingly limiting soil water content, plant growth will respond positively to up to +1.8 ∘C warming during the growing period, corresponding to +1.3 ∘C annual mean warming.

Carbon cycling and net ecosystem production at an early stage of secondary succession in an abandoned coppice forest

2009 ◽  
Vol 123 (4) ◽  
pp. 393-401 ◽  
Author(s):  
Toshiyuki Ohtsuka ◽  
Yoko Shizu ◽  
Ai Nishiwaki ◽  
Yuichiro Yashiro ◽  
Hiroshi Koizumi
Keyword(s):  
Carbon Cycling ◽  
Secondary Succession ◽  
Early Stage ◽  
Net Ecosystem Production ◽  
Ecosystem Production ◽  
Coppice Forest

scholarly journals Nitrogen addition increased CO2 uptake more than non-CO2 greenhouse gases emissions in a Moso bamboo forest

2020 ◽  
Vol 6 (12) ◽  
pp. eaaw5790 ◽  
Author(s):  
Xinzhang Song ◽  
Changhui Peng ◽  
Philippe Ciais ◽  
Quan Li ◽  
Wenhua Xiang ◽  
...  
Keyword(s):  
Nitrogen Addition ◽  
N Deposition ◽  
Moso Bamboo ◽  
Co2 Uptake ◽  
Bamboo Forest ◽  
N Addition ◽  
Atmospheric N Deposition ◽  
Biomass Increment ◽  
Ecosystem Level ◽  
Moso Bamboo Forest

Atmospheric nitrogen (N) deposition affects the greenhouse gas (GHG) balance of ecosystems through the net atmospheric CO2 exchange and the emission of non-CO2 GHGs (CH4 and N2O). We quantified the effects of N deposition on biomass increment, soil organic carbon (SOC), and N2O and CH4 fluxes and, ultimately, the net GHG budget at ecosystem level of a Moso bamboo forest in China. Nitrogen addition significantly increased woody biomass increment and SOC decomposition, increased N2O emission, and reduced soil CH4 uptake. Despite higher N2O and CH4 fluxes, the ecosystem remained a net GHG sink of 26.8 to 29.4 megagrams of CO2 equivalent hectare−1 year−1 after 4 years of N addition against 22.7 hectare−1 year−1 without N addition. The total net carbon benefits induced by atmospheric N deposition at current rates of 30 kilograms of N hectare−1 year−1 over Moso bamboo forests across China were estimated to be of 23.8 teragrams of CO2 equivalent year−1.

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