Transfer and transformation of CeO2 NPs along a terrestrial trophic food chain

2020 ◽  
Vol 7 (2) ◽  
pp. 588-598
Author(s):  
Yanhui Dai ◽  
Zhenyu Wang ◽  
Lei Zhang ◽  
Zhixiang Jiang ◽  
Shengyan Pu ◽  
...  
Keyword(s):  
Food Chain ◽  
Food Chains ◽  
Terrestrial Food Chain

CeO2 NPs could be transferred along a lettuce–hornworm–chicken terrestrial food chain, and the transformation of CeO2 NPs depended on the organisms within food chains.

scholarly journals THE EFFECT OF SELENIUM ON MERCURY TRANSPORT ALONG THE FOOD CHAIN

AGROFOR ◽  
2016 ◽  
Vol 1 (3) ◽  
Author(s):  
Primož ZIDAR ◽  
Špela KRŽIŠNIK ◽  
Marta DEBELJAK ◽  
Suzana ŽIŽEK ◽  
Katarina VOGEL MIKUŠ
Keyword(s):  
Food Chain ◽  
Contaminated Soil ◽  
Local Population ◽  
Trophic Levels ◽  
Food Chains ◽  
Chemical Transformations ◽  
Soil Concentration ◽  
Preliminary Results ◽  
Mercury Transport ◽  
Hg Accumulation

More than 500 years of mercury (Hg) production in Idrija (Slovenia) resulted in aconsiderable pollution of Idrija region with Hg. Although the mine is closed formore than 20 years, the total soil concentration of Hg may still reach up to severalhundred mgkg-1dry weightin local gardens and more that thousand inother urbanregions. Hg in soil undergoesdifferent chemical transformations and in someformsit may enterplants and higher trophic levelsin food chains, also withbiomagnification pattern.The local population is, besides air and dust, thus exposedto mercury also via consumption of locally produced food.Several studies showedthat the increased level of selenium in soil may reduce the uptake of mercury inplants but very few include other trophic levels in a food chain as well.In our pilotstudy we followed an impact of Seon Hg transport from soil to plants(Lactucasativa) and further to soil dwelling animals (Porcellioscaber). Lettuce wasplanted in a contaminated soil from Idrija and in soil with added HgCl2. The leavesof half of the plants weresprayed with Sesolution (5μg L-1)threeand five weeksafter planting.After six weeks plants were analyzed for Hg and Se and offered asfood to terrestrial isopods for two weeks. Our preliminary results revealed thatfoliar treatment of plants with Se may affect Hg accumulation in plants andtherefore further transport of Hg across the food chain.

The transfer of65Zn and 59Fe along a Fucus serratus (L.)→ Littorina obtusata (L.) food chain

1975 ◽  
Vol 55 (3) ◽  
pp. 583-610 ◽  
Author(s):  
M. L. Young
Keyword(s):  
Trace Metals ◽  
Radiation Exposure ◽  
Marine Environment ◽  
Food Chain ◽  
Sea Water ◽  
Food Chains ◽  
Fresh Weight ◽  
Littorina Obtusata ◽  
Fucus Serratus ◽  
Marine Food

In marine organisms the fresh-weight concentrations of the trace metals zinc and iron are 102–105 times the concentrations in sea water. Study of the transfer of these metals along marine food chains is of interest because of the possibility of their being pollutants of the marine environment. Also65Zn and 65Fe are released to the marine environment and have been found, in many instances, to be the predominant radionuclides in food chains leading to man (Lowman, Palumbo & South, 1957; Lowman, 1960; Osterberg, Pearcy & Curl, 1964; Preston, 1967). The transfer of these metals along marine food chains is thus of interest also in the context of human radiation exposure.

Primary Consumer Body Size and Food-Chain Length in Terrestrial Communities

2009 ◽  
Vol 55 (4) ◽  
pp. 329-343 ◽  
Author(s):  
Yoram Ayal ◽  
Elli Groner
Keyword(s):  
Body Size ◽  
Chain Length ◽  
Food Chain ◽  
Energetic Efficiency ◽  
Food Chains ◽  
Food Chain Length ◽  
Primary Consumer ◽  
Size Limitation ◽  
Energy Limitation ◽  
Primary Consumers

Using 21 community food webs, we tested Elton's two hypotheses regarding the main factors limiting food-chain length in terrestrial communities, namely, energy (energy limitation hypothesis—ELH) and body size (size limitation hypothesis—SLH). As predators tend to be larger than their prey, food-chains are size-structured: animal size increases with trophic position. We found a negative correlation between the size of the primary consumer and the length of the chain. Food-chains based on small primary consumers are longer than those based on large primary consumers, and size rather than energetic efficiency is the main contributing factor. We found no correlation between habitat productivity and mean food-chain length. All these findings support the SLH over the ELH. Our results suggest that, as in aquatic communities, a single factor—a predator/prey size-ratio greater than 1—governs the structure of terrestrial communities.

Congener-Specific Accumulation and Food Chain Transfer of Polybrominated Diphenyl Ethers in Two Arctic Food Chains

2004 ◽  
Vol 38 (6) ◽  
pp. 1667-1674 ◽  
Author(s):  
Hans Wolkers ◽  
Bert van Bavel ◽  
Andrew E. Derocher ◽  
Øystein Wiig ◽  
Kit M. Kovacs ◽  
...  
Keyword(s):  
Food Chain ◽  
Polybrominated Diphenyl Ethers ◽  
Chain Transfer ◽  
Food Chains ◽  
Diphenyl Ethers ◽  
Specific Accumulation ◽  
Food Chain Transfer

Trophic Transfer of Au Nanoparticles from Soil along a Simulated Terrestrial Food Chain.

2012 ◽  
Vol 46 (17) ◽  
pp. 9753-9760 ◽  
Author(s):  
Jason M. Unrine ◽  
W. Aaron Shoults-Wilson ◽  
Oksana Zhurbich ◽  
Paul M. Bertsch ◽  
Olga V. Tsyusko
Keyword(s):  
Food Chain ◽  
Au Nanoparticles ◽  
Trophic Transfer ◽  
Terrestrial Food Chain

scholarly journals Biokinetic food chain modeling of waterborne selenium pulses into aquatic food chains: Implications for water quality criteria

2015 ◽  
Vol 12 (2) ◽  
pp. 230-246 ◽  
Author(s):  
David K DeForest ◽  
Suzanne Pargee ◽  
Carrie Claytor ◽  
Steven P Canton ◽  
Kevin V Brix
Keyword(s):  
Water Quality ◽  
Food Chain ◽  
Quality Criteria ◽  
Food Chains ◽  
Water Quality Criteria ◽  
Aquatic Food

scholarly journals Pyramids and cascades: a synthesis of food chain functioning and stability

2018 ◽  
Author(s):  
Matthieu Barbier ◽  
Michel Loreau
Keyword(s):  
Food Chain ◽  
Trophic Cascade ◽  
Self Regulation ◽  
Quantitative Comparison ◽  
Food Chains ◽  
Fragmented Landscape ◽  
Size Spectra ◽  
Predator Prey ◽  
Theoretical Predictions ◽  
Chain Theory

AbstractFood chain theory is one of the cornerstones of ecology, providing many of its basic predictions, such as biomass pyramids, trophic cascades and predator-prey oscillations. Yet, ninety years into this theory, the conditions under which these patterns may occur and persist in nature remain subject to debate. Rather than address each pattern in isolation, we propose that they must be understood together, calling for synthesis in a fragmented landscape of theoretical and empirical results. As a first step, we propose a minimal theory that combines the long-standing energetic and dynamical approaches of food chains. We chart theoretical predictions on a concise map, where two main regimes emerge: across various functioning and stability metrics, one regime is characterized by pyramidal patterns, the other by cascade patterns. The axes of this map combine key physiological and ecological variables, such as metabolic rates and self-regulation. A quantitative comparison with data sheds light on conflicting theoretical predictions and empirical puzzles, from size spectra to causes of trophic cascade strength. We conclude that drawing systematic connections between various existing approaches to food chains, and between their predictions on functioning and stability, is a crucial step in confronting this theory to real ecosystems.

Discerning the Sources of Silver Nanoparticle in a Terrestrial Food Chain by Stable Isotope Tracer Technique

2019 ◽  
Vol 53 (7) ◽  
pp. 3802-3810 ◽  
Author(s):  
Fei Dang ◽  
Yuan-Zhen Chen ◽  
Ying-Nan Huang ◽  
Holger Hintelmann ◽  
You-Bin Si ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Silver Nanoparticle ◽  
Food Chain ◽  
Tracer Technique ◽  
Stable Isotope Tracer ◽  
Isotope Tracer ◽  
Terrestrial Food Chain
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