Spatiotemporal variations in the organic carbon accumulation rate in mangrove sediments from the Yingluo Bay, China, since 1900

2021 ◽  
Author(s):  
Yao Zhang ◽  
Xianwei Meng ◽  
Peng Xia ◽  
Jun Zhang ◽  
Dahai Liu ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Accumulation Rate ◽  
Carbon Accumulation ◽  
Spatiotemporal Variations ◽  
Mangrove Sediments ◽  
Carbon Accumulation Rate ◽  
Yingluo Bay

Water and heat availability are drivers of the aboveground plant carbon accumulation rate in alpine grasslands on the Tibetan Plateau

2019 ◽  
Vol 29 (1) ◽  
pp. 50-64 ◽  
Author(s):  
Jian Sun ◽  
Tian‐Cai Zhou ◽  
Miao Liu ◽  
You‐Chao Chen ◽  
Guo‐Hua Liu ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Accumulation Rate ◽  
Carbon Accumulation ◽  
The Tibetan Plateau ◽  
Alpine Grasslands ◽  
Carbon Accumulation Rate

scholarly journals Dissolved organic carbon vertical movement and carbon accumulation in West Siberian peatlands

2021 ◽  
Author(s):  
Evgeny A. Zarov ◽  
Elena D. Lapshina ◽  
Iris Kuhlmann ◽  
Ernst-Detlef Schulze
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Accumulation Rate ◽  
Bottom Layer ◽  
Vertical Movement ◽  
Carbon Accumulation ◽  
Downward Movement ◽  
Average Value ◽  
Lack Of Information ◽  
Lake Bottom

Abstract. Dissolved organic carbon is an additional path of carbon cycle but there is a lack of information about its distribution in peatland and rates of downward movement. We dated seven peat cores (separately the dissolved (DOC) and particulate (POC) organic carbon) from Mukhrino peatland (typical zonal oligotrophic bog) in western Siberia to assess the date distribution between those two peat fractions. Our results revealed that the DOC is younger than POC for the surface peatland layers (0–150 cm) and older for the deeper layers. The date differences increases with depth and reaches 2000–3000 years at the bottom layer (430–530 cm). In our hypothesis this date discrepancy caused by more young DOC moving to the deeper and older peat layers. The estimated average value of DOC downward movement was 0.047 ± 0.019 cm yr−1. Th oldest dates found at the lake bottom and ancient riverbed were 10 053 and 10 989 cal yr BP correspondingly. For the whole period of peatland functioning the average peat accumulation rate was estimated as 0.067 ± 0.018 cm yr−1 (0.013–0.332 cm yr−1), the carbon accumulation rate was estimated as 38.56 ± 12.21 g С m−2 yr−1 (28.46–57.91 g С m−2 yr−1).

scholarly journals Spatial Variability of Bomb 14C in an Upland Peat Bog

Radiocarbon ◽  
2007 ◽  
Vol 49 (2) ◽  
pp. 1055-1063 ◽  
Author(s):  
S M L Hardie ◽  
M H Garnett ◽  
A E Fallick ◽  
A P Rowland ◽  
N J Ostle
Keyword(s):  
Accumulation Rate ◽  
Carbon Accumulation ◽  
Surface Layers ◽  
The North ◽  
Sampling Locations ◽  
Carbon Accumulation Rate ◽  
Blanket Bog ◽  
Site Variation ◽  
Reference Layer ◽  
Surface Peat

As part of a study investigating the carbon balance of a blanket bog, we made an assessment of the spatial variation of radiocarbon concentrations in the surface layers of a small area of peatland in the north of England. The peat depth at which bomb-14C content was the highest varied considerably between cores sampled from across the site. At several sampling locations, 14C levels >100% Modern were confined to the surface 8 cm, whereas bomb 14C was evident at 1 site, located only meters away, to a depth of at least 12–16 cm. Using the layer where 14C levels first exceeded 100% Modern as a chronological reference layer, we estimated the carbon accumulation rate over the last 50 yr for the surface peat at each site (range ∼20 to ∼125 g C m2 yr-1). Our results show that although carbon accumulation over the last 50 yr was similar across the site, variation in the depth to which bomb 14C was evident implied considerable variation in the vertical peat growth rate.

scholarly journals Spatial and temporal organic carbon burial along a fjord to coast transect: A case study from Western Norway

The Holocene ◽  
2017 ◽  
Vol 27 (9) ◽  
pp. 1325-1339 ◽  
Author(s):  
CJ Duffield ◽  
E Alve ◽  
N Andersen ◽  
TJ Andersen ◽  
S Hess ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Carbon Isotopes ◽  
Accumulation Rate ◽  
Carbon Accumulation ◽  
Individual Species ◽  
Accumulation Rates ◽  
Foraminiferal Assemblage ◽  
Assemblage Composition ◽  
Western Norway ◽  
Carbon Accumulation Rates

We investigated spatial and temporal changes in accumulation rate and source of organic carbon on a gradient along the Lysefjord and the more coastal Høgsfjord, Western Norway. This was achieved through analysis of total organic carbon and nitrogen content of sediment cores, which were radiometrically dated to the early 19th and 20th centuries for the Høgsfjord and Lysefjord, respectively. Benthic foraminifera (protists) were utilized to determine changes in organic carbon supply and Ecological Quality Status (EcoQS) by their accumulation rate (benthic foraminiferal accumulation rate (BFAR)), assemblage composition, species diversity, individual species responses and the composition of stable carbon isotopes of the tests (shells) of Cassidulina laevigata, Hyalinea balthica and Melonis barleeanus. Organic carbon accumulation rates were greatest closest to the river Lyse at the head of the Lysefjord (83–171 g C m−2 yr−1). The organic carbon at the head of the fjord is mainly terrestrial in origin, and this terrestrial influence becomes progressively less seaward. The δ13C in H. balthica tests as well as the benthic foraminiferal assemblage composition also showed a clear fjord to coast gradient. Organic carbon accumulation rates were lower and less variable at the seaward study sites (13–61 g C m−2 yr−1). We observe no temporal trend in organic carbon, carbon isotopes, EcoQS or foraminiferal assemblage composition in the Lysefjord. In contrast, in the Høgsfjord, there seems to have been an increase in organic carbon accumulation rates during the 1940s. Subsequent accumulation rates are stable. The foraminiferal assemblages in the surface sediments reflect a recent transition from good/moderate to moderate/bad EcoQS.

Evolution of the paludification process, and carbon accumulation rate in bog ecosystems of Russia

2013 ◽  
Vol 34 (3) ◽  
pp. 246-253 ◽  
Author(s):  
L. I. Inisheva ◽  
K. I. Kobak ◽  
I. E. Turchinovich
Keyword(s):  
Accumulation Rate ◽  
Carbon Accumulation ◽  
Bog Ecosystems ◽  
Carbon Accumulation Rate

scholarly journals Carbon accumulation rate of peatland in the High Arctic, Svalbard: Implications for carbon sequestration

Polar Science ◽  
2015 ◽  
Vol 9 (2) ◽  
pp. 267-275 ◽  
Author(s):  
Takayuki Nakatsubo ◽  
Masaki Uchida ◽  
Akiko Sasaki ◽  
Miyuki Kondo ◽  
Shinpei Yoshitake ◽  
...  
Keyword(s):  
Carbon Sequestration ◽  
Accumulation Rate ◽  
High Arctic ◽  
Carbon Accumulation ◽  
Carbon Accumulation Rate
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