Results 141 to 150 of about 457,814 (191)

Nitrogen addition has contrasting effects on particulate and mineral-associated soil organic carbon in a subtropical forest

, 2020
Increasing atmospheric nitrogen (N) deposition has substantially affected carbon (C) and nutrient cycling in forest ecosystems. However, the responses of different soil organic carbon (SOC) fractions with different turnover rates to N addition are highly
Jungang Chen, Wen-Juan Xiao, C. Zheng, B. Zhu   +3 more
semanticscholar   +1 more source

A Global Meta‐Analysis of Land Use Change on Soil Mineral‐Associated and Particulate Organic Carbon

Global Change Biology
Separating soil organic carbon (SOC) into mineral‐associated organic carbon (MAOC) and particulate organic carbon (POC) enables accurate prediction of SOC vulnerability to land use change (LUC).
Yuqing Zhao, Yulin Xu, Xinyu Cha, Peng Zhang, Yifan Li, Andong Cai, Zhenghu Zhou, Gaihe Yang, Xinhui Han, Chengjie Ren   +9 more
semanticscholar   +1 more source

14 year applications of chemical fertilizers and crop straw effects on soil labile organic carbon fractions, enzyme activities and microbial community in rice-wheat rotation of middle China.

Science of the Total Environment, 2022
Traditional fertilization management can damage soil structure and lead to severe soil erosion. The practice of crop straw returning to the field reduces the negative impact of straw burning and improves soil quality. We investigated the effects of these
Bo Liu, Hao Xia, Cuncang Jiang, M. Riaz, Li Yang, Yunfeng Chen, Xianpeng Fan, X. Xia   +7 more
semanticscholar   +1 more source

Dissolved and Particulate Organic Carbon in Chesapeake Bay

Estuaries, 1998
We measured dissolved and particulate organic carbon (DOC and POC) in samples collected along 13 transects of the salinity gradient of Chesapeake Bay. Riverine DOC and POC end-members averaged 232±19 μM and 151±53 μM, respectively, and coastal DOC and POC end-members averaged 172±19 μM and 43±6 μM, respectively.
Thomas R. Fisher, James D. Hagy, Emma Rochelle-Newall   +2 more
openaire   +1 more source

Particulate organic carbon in the deep sea

Deep Sea Research and Oceanographic Abstracts, 1967
Abstract Data showing the distribution of particulate and dissolved organic carbon in the tropical Pacific and Atlantic Oceans are given and support the following conclusions : (1) surface standing crop has no measurable influence on the concentration of organic particles occurring at depth; (2) below a given distance of the surface, the distribution
openaire   +1 more source

Satellite estimation of particulate organic carbon flux from Changjiang River to the estuary

Remote Sensing of Environment, 2019
Rivers link land and ocean ecosystems, the two largest active carbon reservoirs in the world, and transport tremendous amounts of particulate organic carbon (POC) into marginal seas annually. Due to high spatiotemporal variations, estimations of riverine
Dong Liu, Yan Bai, Xianqiang He, B. Tao, D. Pan, C. Chen, Lin Zhang, Yi Xu, C. Gong   +8 more
semanticscholar   +1 more source

Particulate organic carbon flux in the subarctic Pacific

Deep Sea Research Part A. Oceanographic Research Papers, 1983
Abstract Particulate organic carbon flux was observed at 51°N, 145°W with a moored sediment trap array. Carbon leaving the euphotic zone was equivalent to 7% of the measured daily primary production. The flux decreased non-linearly with depth, and the carbon reaching the sea floor was equivalent to 3.7% of the daily primary production.
Carl J. Lorenzen, Nicholas A. Welschmeyer, Andrea E. Copping   +2 more
openaire   +1 more source

Particulate organic carbon in Atlantic surface waters

Nature, 1977
PARTICIPATE organic matter (POM) in the oceans has a vital role in marine ecology as it is the major food source for living organisms in surface and deep waters. Nearly all of the suspended organic matter in the oceans originates from phyto-plankton productivity in the euphotic layers and is comprised of living plankton and dead organisms (detritus ...
S. KRISHNASWAMI, D. LAL
openaire   +1 more source

Measurements of Particulate Organic Carbon, Nitrogen, and Phosphorus

2020
Carbon, nitrogen, and phosphate are three macroelements of organisms. These elements are core components of organic matter and biological macromolecules. For this reason, interest in the measurement of particulate organic carbon (POC), nitrogen (PON), and phosphorus (POP) is becoming a hot research topic.
Kai Xu, Kunshan Gao, Fei-xue Fu, David A. Hutchins   +3 more
openaire   +1 more source

Carbon of Particulate Organic Matter

1984
At present the particulate material, one of the components of which in natural waters is OM, is assumed to comprise that part of OM which is retained in the filters with 0.45 – 1 µm pore size or in separators. Large OM particles in natural waters are present in an extremely scattered state and are usually not to be found in filtration particulate ...
openaire   +1 more source