Evidence for negative effects of ZnO nanoparticles on leaf litter decomposition in freshwater ecosystems

2017 ◽  
Vol 4 (12) ◽  
pp. 2377-2387 ◽  
Author(s):  
Jingjing Du ◽  
Yuyan Zhang ◽  
Minghui Cui ◽  
Jingchao Yang ◽  
Zhongdian Lin ◽  
...  
Keyword(s):  
Leaf Litter ◽  
Litter Decomposition ◽  
Ecosystem Function ◽  
Zno Nanoparticles ◽  
Aquatic Ecosystem ◽  
Freshwater Ecosystems ◽  
Leaf Litter Decomposition ◽  
Negative Effects

We investigated the negative effects of ZnO nanoparticles (NPs) on ecosystem function by focusing on the process of leaf litter decomposition in an aquatic ecosystem.

scholarly journals No Difference in Instream Decomposition Among Upland Agricultural and Forested Streams in Kenya

2021 ◽  
Vol 9 ◽  
Author(s):  
Ellen C. Kadeka ◽  
Frank O. Masese ◽  
David M. Lusega ◽  
Augustine Sitati ◽  
Benjamin N. Kondowe ◽  
...  
Keyword(s):  
Leaf Litter ◽  
Litter Decomposition ◽  
Agricultural Land ◽  
Leaf Litter Decomposition ◽  
Limited Data ◽  
Negative Effects ◽  
Decomposition Rates ◽  
Tropical Regions ◽  
Fine Mesh ◽  
Agricultural Streams

Expansion of agriculture is particularly worrying in tropical regions of the world, where native forests have been replaced by croplands and grasslands, with severe consequences for biodiversity conservation and ecosystem functioning. However, limited data exist on the effects of agriculture on the functioning of tropical streams. We conducted a leaf litter decomposition experiment in coarse- and fine-mesh litterbags using the three species of leaves (Eucalyptus globulus [non-native], Vernonia myriantha, and Syzygium cordatum [indigenous]) in three forested and agricultural streams to determine the effect of agriculture on instream leaf litter decomposition in headwater stream sites. We also examined the functional composition of macroinvertebrates in the streams through the contents of benthic kick samples. Agricultural streams had a less dense riparian canopy and smaller abundance of coarse organic particulate matter, and higher electric conductivity and suspended solids than forested streams. In terms of the effects of litter quality on decomposition rates, Vernonia had the fastest decomposition rates while Eucalyptus had the slowest in both forested and agricultural sites. Shredder invertebrates were less abundant in agricultural streams, and in both stream types, they were less diverse and abundant than other functional groups. Overall, leaf litter decomposition rates did not respond to agricultural land-use. The hypothesized negative effects of agriculture on organic matter processing were minimal and likely modulated by intact riparian zones along agricultural streams.

The effects of ZnO nanoparticles on leaf litter decomposition under natural sunlight

2019 ◽  
Vol 6 (4) ◽  
pp. 1180-1188 ◽  
Author(s):  
Jingjing Du ◽  
Yuyan Zhang ◽  
Mingxiang Qv ◽  
Ke Li ◽  
Xiaoyun Yin ◽  
...  
Keyword(s):  
Leaf Litter ◽  
Litter Decomposition ◽  
Zno Nanoparticles ◽  
Decomposition Rate ◽  
Leaf Litter Decomposition ◽  
Zno Nanoparticle ◽  
Nanoparticle Concentration ◽  
Microcosm Experiment ◽  
Natural Sunlight ◽  
Poplar Leaf

An indoor microcosm experiment showed that decomposition rate of poplar leaf litter was significantly and negatively related to ZnO nanoparticle concentration under natural sunlight.

scholarly journals Impact of CeO2nanoparticles on the functions of freshwater ecosystems: a microcosm study

2016 ◽  
Vol 3 (4) ◽  
pp. 830-838 ◽  
Author(s):  
Agathe Bour ◽  
Florence Mouchet ◽  
Stéphanie Cadarsi ◽  
Jérôme Silvestre ◽  
Eric Chauvet ◽  
...  
Keyword(s):  
Leaf Litter ◽  
Litter Decomposition ◽  
Freshwater Ecosystems ◽  
Leaf Litter Decomposition ◽  
Microcosm Study

By affecting decomposer organisms, CeO2NPs may affect leaf litter decomposition and impact the functioning of freshwater ecosystems.

scholarly journals The Impact of Water-Soluble Inorganic Ions in Particulate Matter (PM2.5) on Litter Decomposition in Chinese Subtropical Forests

Forests ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 238 ◽  
Author(s):  
Yanli Ji ◽  
Qiang Li ◽  
Rumeng Ye ◽  
Kai Tian ◽  
Xingjun Tian
Keyword(s):  
Leaf Litter ◽  
Litter Decomposition ◽  
Nitrogen Loss ◽  
Inorganic Ions ◽  
Water Soluble ◽  
Leaf Litter Decomposition ◽  
Negative Effects ◽  
Promoting Effect ◽  
Water Soluble Inorganic Ions ◽  
The Impact

Although numerous studies have demonstrated the toxic effects of fine particulates less than 2.5 µm (PM2.5) on the health of humans, little information is available on the ecotoxicity of PM2.5. Water-soluble inorganic ions (WSII, including Na+, NH4+, K+, Mg2+, Ca2+, Cl−, NO3−, and SO42−) can compose more than 60% of PM2.5. To better understand the possible impacts of WSII-PM2.5 on leaf litter decomposition, we conducted an experiment in which two leaf litters from oak (Quercus variabilis) and pine (Pinus massoniana) dominant forests in subtropical China were incubated in microcosms containing their respective forest soils and treated with WSII-PM2.5. Our results showed that, after six-months of decomposition, the WSII-PM2.5 treatments inhibited leaf litter decomposition rates, carbon and nitrogen loss, microbial biomass, and enzyme activities in the two forests. In addition, higher WSII-PM2.5 concentration led to stronger negative effects. Comparative analysis showed that the negative effects of WSII-PM2.5 on oak forest were greater than on pine forest, relating to the higher susceptibility to changes of soil microenvironment in oak forests. WSII-PM2.5 may influence decomposition through soil acidification and salinization, which could also cause a sub-lethal depression in soil isopod activity. However, in the first month of decomposition, mass loss of the oak and pine leaf litters under the low concentration WSII-PM2.5 were 21.63% and 35.64% higher than that under the control, respectively. This suggests that transitory low concentrations of WSII-PM2.5 have a promoting effect on decomposition. Long-term PM2.5 exposure, therefore, may have profound ecosystem consequences by altering the balance of ecosystem carbon flux, nutrient cycling, and humus formation in the future.

scholarly journals Artificial Light at Night Alleviates the Negative Effect of Pb on Freshwater Ecosystems

2019 ◽  
Vol 20 (6) ◽  
pp. 1343 ◽  
Author(s):  
Gaozhong Pu ◽  
Danjuan Zeng ◽  
Ling Mo ◽  
Jianxiong Liao ◽  
Xiaxia Chen
Keyword(s):  
Leaf Litter ◽  
Litter Decomposition ◽  
Decomposition Rate ◽  
Aquatic Ecosystems ◽  
Freshwater Ecosystems ◽  
Leaf Litter Decomposition ◽  
Artificial Light ◽  
Light At Night ◽  
Negative Effect ◽  
The Impact

Artificial light at night (ALAN) is an increasing phenomenon worldwide that can cause a series of biological and ecological effects, yet little is known about its potential interaction with other stressors in aquatic ecosystems. Here, we tested whether the impact of lead (Pb) on litter decomposition was altered by ALAN exposure using an indoor microcosm experiment. The results showed that ALAN exposure alone significantly increased leaf litter decomposition, decreased the lignin content of leaf litter, and altered fungal community composition and structure. The decomposition rate was 51% higher in Pb with ALAN exposure treatments than in Pb without ALAN treatments, resulting in increased microbial biomass, β-glucosidase (β-G) activity, and the enhanced correlation between β-G and litter decomposition rate. These results indicate that the negative effect of Pb on leaf litter decomposition in aquatic ecosystems may be alleviated by ALAN. In addition, ALAN exposure also alters the correlation among fungi associated with leaf litter decomposition. In summary, this study expands our understanding of Pb toxicity on litter decomposition in freshwater ecosystems and highlights the importance of considering ALAN when assessing environmental metal pollutions.

Litter chemistry prevails over litter consumers in mediating effects of past steel industry activities on leaf litter decomposition

2015 ◽  
Vol 537 ◽  
pp. 213-224 ◽  
Author(s):  
Pierre Lucisine ◽  
Antoine Lecerf ◽  
Michaël Danger ◽  
Vincent Felten ◽  
Delphine Aran ◽  
...  
Keyword(s):  
Leaf Litter ◽  
Litter Decomposition ◽  
Steel Industry ◽  
Leaf Litter Decomposition ◽  
Litter Chemistry ◽  
Mediating Effects

Effect of vertebrate exclusion on leaf litter decomposition in the coastal Atlantic forest of southeast Brazil

2021 ◽  
Author(s):  
Gabriela Garcia Medeiros ◽  
Juliana Antonio ◽  
Michelle Harrison ◽  
Luciana Della Coletta ◽  
Amin Soltangheisi ◽  
...  
Keyword(s):  
Leaf Litter ◽  
Litter Decomposition ◽  
Atlantic Forest ◽  
Leaf Litter Decomposition ◽  
Southeast Brazil
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