scholarly journals The role of soil redox conditions in microbial phosphorus cycling in humid tropical forests

Ecology ◽  
2019 ◽  
Vol 101 (2) ◽  
Author(s):  
Avner Gross ◽  
Yang Lin ◽  
Peter K. Weber ◽  
Jennifer Pett‐Ridge ◽  
Whendee L. Silver
Keyword(s):  
Tropical Forests ◽  
Redox Conditions ◽  
Phosphorus Cycling ◽  
Soil Redox

The Role of Tropical Forests in Supporting Biodiversity and Hydrological Integrity

2005 ◽  
Author(s):  
Ellen M. Douglas ◽  
Kate Sebastian ◽  
Charles J. Vorosmarty ◽  
Stanley Wood ◽  
Kenneth M. Chomitz
Keyword(s):  
Tropical Forests

scholarly journals Remediation of mercury-contaminated soils and sediments using biochar: a critical review

Biochar ◽  
2021 ◽  
Author(s):  
Qian Yang ◽  
Yongjie Wang ◽  
Huan Zhong
Keyword(s):  
Health Risks ◽  
Contaminated Soils ◽  
Functional Materials ◽  
Redox Conditions ◽  
Existing Problems ◽  
Soils And Sediments ◽  
Underlying Mechanisms ◽  
Biochar Amendment

AbstractThe transformation of mercury (Hg) into the more toxic and bioaccumulative form methylmercury (MeHg) in soils and sediments can lead to the biomagnification of MeHg through the food chain, which poses ecological and health risks. In the last decade, biochar application, an in situ remediation technique, has been shown to be effective in mitigating the risks from Hg in soils and sediments. However, uncertainties associated with biochar use and its underlying mechanisms remain. Here, we summarize recent studies on the effects and advantages of biochar amendment related to Hg biogeochemistry and its bioavailability in soils and sediments and systematically analyze the progress made in understanding the underlying mechanisms responsible for reductions in Hg bioaccumulation. The existing literature indicates (1) that biochar application decreases the mobility of inorganic Hg in soils and sediments and (2) that biochar can reduce the bioavailability of MeHg and its accumulation in crops but has a complex effect on net MeHg production. In this review, two main mechanisms, a direct mechanism (e.g., Hg-biochar binding) and an indirect mechanism (e.g., biochar-impacted sulfur cycling and thus Hg-soil binding), that explain the reduction in Hg bioavailability by biochar amendment based on the interactions among biochar, soil and Hg under redox conditions are highlighted. Furthermore, the existing problems with the use of biochar to treat Hg-contaminated soils and sediments, such as the appropriate dose and the long-term effectiveness of biochar, are discussed. Further research involving laboratory tests and field applications is necessary to obtain a mechanistic understanding of the role of biochar in reducing Hg bioavailability in diverse soil types under varying redox conditions and to develop completely green and sustainable biochar-based functional materials for mitigating Hg-related health risks.

scholarly journals The role of planktonic bacteria in phosphorus cycling in lakes - Sink and link

1993 ◽  
Vol 38 (7) ◽  
pp. 1539-1544 ◽  
Author(s):  
Olav Vadstein ◽  
Yngvar Olsen ◽  
Helge Reinertsen ◽  
Arne Jensen
Keyword(s):  
Phosphorus Cycling ◽  
Planktonic Bacteria

Influence of soil redox conditions on oxidation of biotite

Clay Minerals ◽  
1986 ◽  
Vol 21 (2) ◽  
pp. 149-157 ◽  
Author(s):  
S. Bouda ◽  
K. P. Isaac
Keyword(s):  
Mössbauer Spectroscopy ◽  
Soil Profile ◽  
Mossbauer Spectroscopy ◽  
Redox Conditions ◽  
Soil Profiles ◽  
Moderate Degree ◽  
Soil Redox ◽  
Mößbauer Spectroscopy

AbstractBiotites from three peaty gleyed podzol soil profiles on ranite bedrock were examined to investigate the oxidation of the octahedral Fe during weathering. Oxidation of these biotites as determined by Mössbauer spectroscopy shows a good correlation with the in situ measured soil Eh values of the sampled horizons. In every soil profile the highest Eh measured is in the A horizon and the lowest in the C horizon. Similarly, biotites from the A horizons are the most oxidized compared with those from the lower horizons. In most of the samples the oxidation is accompanied by loss of K+ from the lattice, as demonstrated by a moderate degree of vermiculitization.

scholarly journals Climate change, allergy and asthma, and the role of tropical forests

2017 ◽  
Vol 10 ◽  
pp. 11 ◽  
Author(s):  
Gennaro D’Amato ◽  
Carolina Vitale ◽  
Nelson Rosario ◽  
Herberto Josè Chong Neto ◽  
Deborah Carla Chong-Silva ◽  
...  
Keyword(s):  
Climate Change ◽  
Tropical Forests ◽  
Allergy And Asthma

Author response for "Unraveling the relative role of light and water competition between lianas and trees in tropical forests"

2020 ◽  
Author(s):  
Félicien Meunier ◽  
Hans Verbeeck ◽  
Betsy Cowdery ◽  
Stefan A. Schnitzer ◽  
Chris M. Smith‐Martin ◽  
...  
Keyword(s):  
Tropical Forests ◽  
Author Response ◽  
Relative Role ◽  
Water Competition ◽  
Role Of Light

Author response for "Unraveling the relative role of light and water competition between lianas and trees in tropical forests"

2020 ◽  
Author(s):  
Félicien Meunier ◽  
Hans Verbeeck ◽  
Betsy Cowdery ◽  
Stefan A. Schnitzer ◽  
Chris M. Smith‐Martin ◽  
...  
Keyword(s):  
Tropical Forests ◽  
Author Response ◽  
Relative Role ◽  
Water Competition ◽  
Role Of Light
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