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Biogeochemistry

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Cellular and genetic mechanism of bacterial mercury resistance and their role in biogeochemistry and bioremediation.

Monika Priyadarshanee, Shreosi Chatterjee, Sonalin Rath, Hirak R Dash, Surajit Das,

Mercury (Hg) is a highly toxic element that occurs at low concentrations in nature. However, various anthropogenic and natural sources contribute around 5000 to 8000 metric tons of Hg per year, rapidly deteriorating the environmental conditions. Mercury-resistant bacteria that possess the mer operon system have the potential for Hg bioremediation ... Read more >>

J Hazard Mater (Journal of hazardous materials)
[2021, 423(Pt A):126985]

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The beneficial and hazardous effects of selenium on the health of the soil-plant-human system: An overview.

Hui Yang, Xuefeng Yang, Zengping Ning, Sae Yun Kwon, Mi-Ling Li, Filip M G Tack, Eilhann E Kwon, Jörg Rinklebe, Runsheng Yin,

Selenium (Se), which can be both hazardous and beneficial to plants, animals and humans, plays a pivotal role in regulating soil-plant-human ecosystem functions. The biogeochemical behavior of Se and its environmental impact on the soil-plant-human system has received broad attention in the last decades. This review provides a comprehensive understanding ... Read more >>

J Hazard Mater (Journal of hazardous materials)
[2021, 422:126876]

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Amynthas spp. impacts on seedlings and forest soils are tree species-dependent

Patricia G Bethke, Meghan G Midgley,

Asian jumping worms (Amynthas spp.) are recent invaders of Upper Midwest forests. Research has highlighted the impacts of Amynthas earthworms on soil biogeochemistry and structure, and field observations suggest that Amynthas spp. decrease litter horizon depth and alter plant communities. However, the extent to which Amynthas spp. effects vary among ... Read more >>

Biol Invasions (Biological invasions.)
[2021, 22(10):3145-3162]

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The evolution of biogeochemistry: revisited

Thomas S Bianchi,

The evolution of biogeochemistry, retraces the important historical steps in part, covered by Gorham (Biogeochemistry 13:199–239, 1991) in the 18–19th centuries—with new emergent linkages and trends in 20–21st centuries. In the post-phlogiston period, key synthetic connections are made between weathering, atmospheric chemistry, carbon cycling, and climate change. Early work in ... Read more >>

(Biogeochemistry.)
[2021, 154(2):141-181]

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Biogeochemical feedbacks associated with the response of micronutrient recycling by zooplankton to climate change.

Camille Richon, Alessandro Tagliabue,

Recycling by zooplankton has emerged as an important process driving the cycling of essential micronutrients in the upper ocean. Resupply of nutrients by upper ocean recycling is itself controlled by multiple biotic and abiotic factors. Although the response of these drivers to climate change will shape future recycling rates and ... Read more >>

Glob Chang Biol (Global change biology)
[2021, 27(19):4758-4770]

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Coastal riverine wetland biogeochemistry follows soil organic matter distribution along a marsh-to-mangrove gradient (Florida, USA).

Sarah A Harttung, Kara R Radabaugh, Ryan P Moyer, Joseph M Smoak, Lisa G Chambers,

Many subtropical coastal wetland vegetation communities are transitioning from herbaceous marsh to woody mangrove, often facilitated by sea-level rise. This study investigated the relationships between vegetation community (upstream marsh, ecotone/transition, and downstream mangrove), salinity (S), and soil biogeochemistry in wetlands along three rivers on the Florida Gulf coast (the Little ... Read more >>

Sci Total Environ (The Science of the total environment)
[2021, 797:149056]

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Earth, Wind, Fire, and Pollution: Aerosol Nutrient Sources and Impacts on Ocean Biogeochemistry.

Douglas S Hamilton, Morgane M G Perron, Tami C Bond, Andrew R Bowie, Rebecca R Buchholz, Cecile Guieu, Akinori Ito, Willy Maenhaut, Stelios Myriokefalitakis, Nazlı Olgun, Sagar D Rathod, Kerstin Schepanski, Alessandro Tagliabue, Robert Wagner, Natalie M Mahowald,

A key Earth system science question is the role of atmospheric deposition in supplying vital nutrients to the phytoplankton that form the base of marine food webs. Industrial and vehicular pollution, wildfires, volcanoes, biogenic debris, and desert dust all carry nutrients within their plumes throughout the globe. In remote ocean ... Read more >>

Ann Rev Mar Sci (Annual review of marine science)
[2021, :]

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Nitrogen biogeochemistry of water-agro-food systems: the example of the Seine land-to-sea continuum

Gilles Billen, Josette Garnier,

As an illustration of the usefulness of the concept of water-agro-food systems, this paper describes the mechanisms behind the nitrogen cascade from agricultural soils to the coastal sea rivers through aquifers, riparian wetlands, rivers and streams and the estuary, for the case study of the Seine river watershed and its ... Read more >>

(Biogeochemistry.)
[2021, 154(2):307-321]

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Major restructuring of marine plankton assemblages under global warming.

Fabio Benedetti, Meike Vogt, Urs Hofmann Elizondo, Damiano Righetti, Niklaus E Zimmermann, Nicolas Gruber,

Marine phytoplankton and zooplankton form the basis of the ocean's food-web, yet the impacts of climate change on their biodiversity are poorly understood. Here, we use an ensemble of species distribution models for a total of 336 phytoplankton and 524 zooplankton species to determine their present and future habitat suitability ... Read more >>

Nat Commun (Nature communications)
[2021, 12(1):5226]

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Deciphering Metabolic Currencies That Support Marine Microbial Networks.

Bryndan P Durham,

Microbes are omnipresent in the biosphere and perform biological and chemical processes critical to ecosystem function, nutrient cycling, and global climate regulation. In the ocean, microbes constitute more than two-thirds of biomass with abundances reaching over one million microbial cells per milliliter of seawater. Our understanding of the marine microbial ... Read more >>

mSystems (mSystems)
[2021, 6(4):e0076321]

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Lithium: Perspectives of nutritional beneficence, dietary intake, biogeochemistry, and biofortification of vegetables and mushrooms.

Asif Naeem, Muhammad Aslam, Saifullah, Karl H Mühling,

Although lithium (Li) is not an essential nutrient for humans, low Li intakes are associated with increased suicide and homicide rates, aggressive behaviors, unipolar/bipolar disorders, acute mania, etc. On the other hand, Li is one of the most effective psychopharmacological agents used for the treatment of these psycho-behavioral disorders. The ... Read more >>

Sci Total Environ (The Science of the total environment)
[2021, 798:149249]

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Historical increases in land-derived nutrient inputs may alleviate effects of a changing physical climate on the oceanic carbon cycle.

Fabrice Lacroix, Tatiana Ilyina, Moritz Mathis, Goulven G Laruelle, Pierre Regnier,

The implications of climate change and other human perturbations on the oceanic carbon cycle are still associated with large uncertainties. Global-scale modelling studies are essential to investigate anthropogenic perturbations of oceanic carbon fluxes but, until now, they have not considered the impacts of temporal changes in riverine and atmospheric inputs ... Read more >>

Glob Chang Biol (Global change biology)
[2021, :]

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The Physiology and Biogeochemistry of SUP05.

Robert M Morris, Rachel L Spietz,

The SUP05 clade of gammaproteobacteria (Thioglobaceae) comprises both primary producers and primary consumers of organic carbon in the oceans. Host-associated autotrophs are a principal source of carbon and other nutrients for deep-sea eukaryotes at hydrothermal vents, and their free-living relatives are a primary source of organic matter in seawater at ... Read more >>

Ann Rev Mar Sci (Annual review of marine science)
[2021, :]

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How humans alter dissolved organic matter composition in freshwater: relevance for the Earth’s biogeochemistry

Marguerite A Xenopoulos, Rebecca T Barnes, Kyle S Boodoo, David Butman, Núria Catalán, Sarah C D’Amario, Christina Fasching, Dolly N Kothawala, Oliva Pisani, Christopher T Solomon, Robert G M Spencer, Clayton J Williams, Henry F Wilson,

Dissolved organic matter (DOM) is recognized for its importance in freshwater ecosystems, but historical reliance on DOM quantity rather than indicators of DOM composition has led to an incomplete understanding of DOM and an underestimation of its role and importance in biogeochemical processes. A single sample of DOM can be ... Read more >>

(Biogeochemistry.)
[2021, 154(2):323-348]

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Aquatic occurrence of phytotoxins in small streams triggered by biogeography, vegetation growth stage, and precipitation.

Barbara F Günthardt, Juliane Hollender, Martin Scheringer, Konrad Hungerbühler, Mulatu Y Nanusha, Werner Brack, Thomas D Bucheli,

Toxic plant secondary metabolites (PSMs), so-called phytotoxins, occur widely in plant species. Many of these phytotoxins have similar mobility, persistence, and toxicity properties in the environment as anthropogenic micropollutants, which increasingly contaminate surface waters. Although recent case studies have shown the aquatic relevance of phytotoxins, the overall exposure remains unknown. ... Read more >>

Sci Total Environ (The Science of the total environment)
[2021, 798:149128]

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Some thoughts on the biogeochemical cycling of potassium in terrestrial ecosystems

William H Schlesinger,

Potassium presents a conundrum for biogeochemists. Potassium is cycled wastefully at the plant level, but it appears to be conserved in the nutrient budgets of entire ecosystems, where it sometimes limits net primary productivity. An increasing demand for K fertilizer may accompany the expansion of agriculture into highly weathered tropical ... Read more >>

(Biogeochemistry.)
[2021, 154(2):427-432]

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Geologic controls on phytoplankton elemental composition

Shlomit Sharoni, Itay Halevy,

Although the nutrient content of planktonic organic matter (C:N:Porg) plays a crucial role in marine metazoan evolution and global biogeochemistry (1–3), its geologic history is poorly constrained, and it is often regarded as a constant “Redfield” ratio of C:N:Porg~106:16:1. We calculate C:N:Porg through the Phanerozoic by including nutrient- and temperature-dependent ... Read more >>

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A “toy” model of biogeochemical dynamics on climate gradients

Peter M Vitousek, Jesse Bloom Bateman, Oliver A Chadwick,

We used a simple “toy” model to aid in the evaluation of the controls of biogeochemical patterns along a climate gradient. The model includes simplified treatments of water balance (precipitation minus Potential Evapotranspiration), leaching, weathering of cation- and P-bearing minerals, N cycling and loss, biomass production, and biological N fixation. ... Read more >>

(Biogeochemistry.)
[2021, 154(2):183-210]

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The role of woody detritus in biogeochemical cycles: past, present, and future

Mark E Harmon,

Woody detritus (WD), created by mortality of trees and their associated parts, is an important component of forested ecosystems with roles in energy flow, hydrologic and geomorphologic processes as well as in carbon and nutrient cycling. Although likely to be increasingly important as forest systems respond to climatic and other ... Read more >>

(Biogeochemistry.)
[2021, 154(2):349-369]

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Carbon and nitrogen stable isotopic offsets between diet and hair/feces in captive orangutans.

Takumi Tsutaya, Nanako O Ogawa, Toshiya Nomura, Mika Shimizu, Naohiko Ohkouchi, Noko Kuze,

Estimating stable isotopic offset values is crucial for dietary reconstructions. Although research into stable isotope ecology of wild nonhuman primates is increasing overall, only a minority of studies involve laboratory experiments. This study is the first to report the carbon and nitrogen stable isotopic offset values in hair and feces ... Read more >>

Primates (Primates; journal of primatology)
[2021, :]

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Determining ecosystem functioning in Brazilian biomes through foliar carbon and nitrogen concentrations and stable isotope ratios

L A Martinelli, G B Nardoto, A Soltangheisi, C R G Reis, A L Abdalla-Filho, P B Camargo, T F Domingues, D Faria, A M Figueira, T F Gomes, S R M Lins, S F Mardegan, E Mariano, R C Miatto, R Moraes, M Z Moreira, R S Oliveira, J P H B Ometto, F L S Santos, J Sena-Souza, D M L Silva, J C S S Silva, S A Vieira,

By analyzing 6,480 tree leaf samples from 57 sites within Brazilian biomes, we considered whether vegetation types in terrestrial ecosystems reflect biogeochemical diversity and whether they fit into a leaf economics spectrum (LES). To achieve this, we investigated the relations among leaf carbon (C) and nitrogen (N) concentrations, their isotope ... Read more >>

(Biogeochemistry.)
[2021, 154(2):405-423]

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Four years of litter input manipulation changes soil microbial characteristics in a temperate mixed forest

Weiwei Dai, Bo Peng, Jun Liu, Chao Wang, Xin Wang, Ping Jiang, Edith Bai,

Aboveground litter not only is an important source of nutrients to soil microbes but also regulates the microclimate in topsoil. How the changes in aboveground litter quantity would affect the microbial biogeochemical cycles is still unclear. Here we conducted a litter input manipulation experiment in a temperate mixed forest to ... Read more >>

(Biogeochemistry.)
[2021, 154(2):371-383]

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Role of external inputs of nutrients to aquatic ecosystems in determining prevalence of nitrogen vs. phosphorus limitation of net primary productivity

R W Howarth, F Chan, D P Swaney, R M Marino, M Hayn,

Whether net primary productivity in an aquatic ecosystem is limited by nitrogen (N), limited by phosphorus (P), or co-limited by N & P is determined by the relative supply of N and P to phytoplankton compared to their elemental requirements for primary production, often characterized by the “Redfield” ratio. The ... Read more >>

(Biogeochemistry.)
[2021, 154(2):293-306]

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Light-trapped caddisflies to decipher the role of species traits and habitats in Hg accumulation and transfer.

Pierre Marle, Pablo Timoner, Wei Liu, Emmanuel Castella, Vera I Slaveykova,

We present a novel meta-community approach to explore the influence of species traits, such as adult body size, larval feeding type and microhabitat, as well as larval macrohabitat (main river channel vs. floodplain water bodies) on the concentration of total Hg accumulated ([THg]) in assemblages of adult caddisflies. We analyzed ... Read more >>

Chemosphere (Chemosphere)
[2021, 287(Pt 1):131909]

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Pelagic denitrification and methane oxidation in oxygen-depleted waters of the Louisiana shelf

Mary Katherine Rogener, Kimberley S Hunter, Nancy N Rabalais, Brian J Roberts, Annalisa Bracco, Frank J Stewart, Samantha B Joye,

Anthropogenic nutrient inputs fuel eutrophication and hypoxia ([O₂] < 2 mg L⁻¹), threatening coastal and near shore environments across the globe. The world’s second largest anthropogenic coastal hypoxic zone occurs annually along the Louisiana (LA) shelf. Springtime loading of dissolved inorganic nitrogen (DIN) from the Mississippi River, combined with summertime stratification and increased ... Read more >>

(Biogeochemistry.)
[2021, 154(2):231-254]

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