A bioturbator, a holobiont, and a vector: The multifaceted role of Chironomus plumosus in shaping N‐cycling

2021 ◽  
Author(s):  
Tobia Politi ◽  
Rūta Barisevičiūte ◽  
Marco Bartoli ◽  
Stefano Bonaglia ◽  
Ulisse Cardini ◽  
...  
Keyword(s):  
N Cycling ◽  
Chironomus Plumosus

scholarly journals The Effect of Chironomid Larvae on Nitrogen Cycling and Microbial Communities in Soft Sediments

Water ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1931
Author(s):  
Aurelija Samuiloviene ◽  
Marco Bartoli ◽  
Stefano Bonaglia ◽  
Ulisse Cardini ◽  
Irma Vybernaite-Lubiene ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Hot Spots ◽  
N Cycling ◽  
Molecular Techniques ◽  
Marker Genes ◽  
Chironomid Larvae ◽  
Subsurface Sediments ◽  
Activity Marker ◽  
Diptera Larvae

The combination of biogeochemical methods and molecular techniques has the potential to uncover the black-box of the nitrogen (N) cycle in bioturbated sediments. Advanced biogeochemical methods allow the quantification of the process rates of different microbial processes, whereas molecular tools allow the analysis of microbial diversity (16S rRNA metabarcoding) and activity (marker genes and transcripts) in biogeochemical hot-spots such as the burrow wall or macrofauna guts. By combining biogeochemical and molecular techniques, we analyzed the role of tube-dwelling Chironomus plumosus (Insecta, Diptera) larvae on nitrification and nitrate reduction processes in a laboratory experiment with reconstructed sediments. We hypothesized that chironomid larvae stimulate these processes and host bacteria actively involved in N-cycling. Our results suggest that chironomid larvae significantly enhance the recycling of ammonium (80.5 ± 48.7 µmol m−2 h−1) and the production of dinitrogen (420.2 ± 21.4 µmol m−2 h−1) via coupled nitrification–denitrification and the consumption of water column nitrates. Besides creating oxygen microniches in ammonium-rich subsurface sediments via burrow digging and ventilation, chironomid larvae serve as hot-spots of microbial communities involved in N-cycling. The quantification of functional genes showed a significantly higher potential for microbial denitrification and nitrate ammonification in larvae as compared to surrounding sediments. Future studies may further scrutinize N transformation rates associated with intimate macrofaunal–bacteria associations.

Role of dissolved organic nitrogen (DON) in soil N cycling in grassland soils

2004 ◽  
Vol 36 (5) ◽  
pp. 749-756 ◽  
Author(s):  
David L. Jones ◽  
David Shannon ◽  
Daniel V. Murphy ◽  
John Farrar
Keyword(s):  
Dissolved Organic Nitrogen ◽  
Organic Nitrogen ◽  
N Cycling ◽  
Soil N ◽  
Grassland Soils

Role of algae in the diet of Chironomus plumosus F. semireductus from the Bay of Quinte, Lake Ontario

Hydrobiologia ◽  
1983 ◽  
Vol 107 (3) ◽  
pp. 237-247 ◽  
Author(s):  
Ora E. Johannsson ◽  
Janet L. Beaver
Keyword(s):  
Lake Ontario ◽  
Chironomus Plumosus

Role of ingestion route in the perfluoroalkyl substance bioaccumulation by Chironomus plumosus larvae in sediments amended with carbonaceous materials

2016 ◽  
Vol 302 ◽  
pp. 404-414 ◽  
Author(s):  
Yawei Zhai ◽  
Xinghui Xia ◽  
Xiuli Zhao ◽  
Haiyang Dong ◽  
Baotong Zhu ◽  
...  
Keyword(s):  
Carbonaceous Materials ◽  
Chironomus Plumosus

scholarly journals Cycling and retention of nitrogen in European beech (Fagus sylvatica L.) ecosystems under elevated fructification frequency

2021 ◽  
Author(s):  
Rainer Brumme ◽  
Bernd Ahrends ◽  
Joachim Block ◽  
Christoph Schulz ◽  
Henning Meesenburg ◽  
...  
Keyword(s):  
Plant Growth ◽  
Leaf Litter ◽  
European Beech ◽  
N Cycling ◽  
Total N ◽  
N Retention ◽  
Leaf Litterfall ◽  
Fagus Sylvatica L ◽  
Mineral Soils

Abstract. Atmospheric deposition of nitrogen (N) has exceeded its demand for plant increment in forest ecosystems in Germany. High N inputs increased plant growth, the internal N cycling within the ecosystem, the retention of N in soils and plant compartments, and the N output by seepage water. But the processes involved are not fully understood, especially the role of fructification which has increased in its frequency. A field experiment using 15N labelled leaf litter exchange was carried out over a 5.5 years' period at seven long-term monitoring sites with European beech (Fagus sylvatica L.) ecosystems to study the impact of current mast frequency on N cycling. Mean annual leaf litterfall contained 35 kg N ha−1, but about one half of that was recovered in the soil 5.5 years after the establishment of the leaf litter 15N exchange experiment. Retention of leaf litter N in the soil was more closely related to the production of total litterfall than to the leaf litterfall indicating the role of fructification of beech trees in the amount of leaf N retained in the soil. In these forests fructification occurred commonly in intervals of 5 to 10 years, which has now changed to every two to three years as observed during this study period. Seed cupules contributed 51 % to the additional litterfall in mast years which caused a high nutrient demand during their decomposition due to their very high carbon (C) to N and C to phosphorus (P) ratios. Higher mast frequency increased the mass of mean annual litterfall by about 0.5 Mg ha−1 and of litterfall N by 8.7 kg ha−1. Mean net primary production (NPP) increased by about 4 %. Mean total N retention in soils calculated by input and output fluxes was unrelated to total litterfall indicating that mast events were not the primary factor controlling total N retention in soils. Despite reduced N deposition since the 1990s about 5.7 kg N ha−1 out of 20.7 kg N ha−1 deposited annually between 1994 and 2008 were retained in soils notably at acid sites with high N / P and C / P ratios in the organic layers and mineral soils. Ongoing N retention increased the N / P ratios in acid soils with moder type humus forms and reduced the availability of P for plant growth and litter decomposition. Trees retained twice as much N compared to soils by biomass increment particularly in less acid stands where the mineral soils had low C / N ratios.

Role of soluble and exchangeable nitrogen pools in N cycling and the impact of nitrogen added in forest soil

2019 ◽  
Vol 27 (5) ◽  
pp. 5398-5407
Author(s):  
Hongliang Ma ◽  
Hüseyin Barış Tecimen ◽  
Wei Lin ◽  
Ren Gao ◽  
Yunfeng Yin ◽  
...  
Keyword(s):  
Forest Soil ◽  
N Cycling ◽  
Nitrogen Pools ◽  
The Impact

Role of amendments on N cycling in Mediterranean abandoned semiarid soils

2009 ◽  
Vol 41 (2) ◽  
pp. 195-205 ◽  
Author(s):  
F. Bastida ◽  
A. Pérez-de-Mora ◽  
K. Babic ◽  
B. Hai ◽  
T. Hernández ◽  
...  
Keyword(s):  
N Cycling ◽  
Semiarid Soils
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