Positive versus negative effects of urea – a fertilizer and fungicide – on a keystone detritivore Asellus aquaticus

Human induced chemical pollution has caused a decrease in the water quality of freshwater ecosystems in large parts of the world. One of the main reasons for this is pollution from nitrogen fertilizers like urea. Urea is naturally occurring as a nitrogenous waste product and due to its high nitrogen...

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Bibliografiset tiedot
Päätekijä: Pennanen, Jenni
Muut tekijät: Matemaattis-luonnontieteellinen tiedekunta, Faculty of Sciences, Bio- ja ympäristötieteiden laitos, Department of Biological and Environmental Science, Jyväskylän yliopisto, University of Jyväskylä
Aineistotyyppi: Pro gradu
Kieli:eng
Julkaistu: 2024
Aiheet:
Linkit: https://jyx.jyu.fi/handle/123456789/96258
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author Pennanen, Jenni
author2 Matemaattis-luonnontieteellinen tiedekunta Faculty of Sciences Bio- ja ympäristötieteiden laitos Department of Biological and Environmental Science Jyväskylän yliopisto University of Jyväskylä
author_facet Pennanen, Jenni Matemaattis-luonnontieteellinen tiedekunta Faculty of Sciences Bio- ja ympäristötieteiden laitos Department of Biological and Environmental Science Jyväskylän yliopisto University of Jyväskylä Pennanen, Jenni Matemaattis-luonnontieteellinen tiedekunta Faculty of Sciences Bio- ja ympäristötieteiden laitos Department of Biological and Environmental Science Jyväskylän yliopisto University of Jyväskylä
author_sort Pennanen, Jenni
datasource_str_mv jyx
description Human induced chemical pollution has caused a decrease in the water quality of freshwater ecosystems in large parts of the world. One of the main reasons for this is pollution from nitrogen fertilizers like urea. Urea is naturally occurring as a nitrogenous waste product and due to its high nitrogen content, it is widely used as a fertilizer. It is also used as a fungicide because of urea hydrolysis that turns it into toxic ammonia. Urea is non-toxic to mammals in environmentally relevant concentrations but can cause eutrophication of aquatic systems due to its high nitrogen concentration. In this study, I wanted to test if urea had positive or negative effects on a common keystone detritivore, the freshwater isopod Asellus aquaticus. I conducted a factorial 3x3 laboratory experiment and tested environmentally relevant concentrations (0, 1 mg/l and 10 mg/l) in two different pathways: direct and indirect and how those two pathways influenced their effect on isopod’s food consumption, growth, and pigmentation. Direct pathway means urea exposure through water and indirect effects through urea exposure of their diet (likely modifying the nitrogen content and microbial community in the leaves they consume). The results of my study suggest that urea effects on A. aquaticus are complex and showed significant interactions between size of the isopod and both pathways. This shows the importance of considering multiple exposure pathways in pollution studies. Urea can have significant ecological impacts, affecting nutrient cycling and food web dynamics.
first_indexed 2024-09-11T08:51:28Z
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One of the main reasons for this is pollution from nitrogen fertilizers like urea. Urea is naturally occurring as a nitrogenous waste product and due to its high nitrogen content, it is widely used as a fertilizer. It is also used as a fungicide because of urea hydrolysis that turns it into toxic ammonia. Urea is non-toxic to mammals in environmentally relevant concentrations but can cause eutrophication of aquatic systems due to its high nitrogen concentration. \nIn this study, I wanted to test if urea had positive or negative effects on a common keystone detritivore, the freshwater isopod Asellus aquaticus. I conducted a factorial 3x3 laboratory experiment and tested environmentally relevant concentrations (0, 1 mg/l and 10 mg/l) in two different pathways: direct and indirect and how those two pathways influenced their effect on isopod\u2019s food consumption, growth, and pigmentation. 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spellingShingle Pennanen, Jenni Positive versus negative effects of urea – a fertilizer and fungicide – on a keystone detritivore Asellus aquaticus nutrient pollution Ympäristötiede Environmental science 40151 urea lannoitteet vesien saastuminen typpi ympäristövaikutukset typpilannoitteet ammoniakki fertilisers water pollution nitrogen environmental effects nitrogenous fertilizers ammonia
title Positive versus negative effects of urea – a fertilizer and fungicide – on a keystone detritivore Asellus aquaticus
title_full Positive versus negative effects of urea – a fertilizer and fungicide – on a keystone detritivore Asellus aquaticus
title_fullStr Positive versus negative effects of urea – a fertilizer and fungicide – on a keystone detritivore Asellus aquaticus Positive versus negative effects of urea – a fertilizer and fungicide – on a keystone detritivore Asellus aquaticus
title_full_unstemmed Positive versus negative effects of urea – a fertilizer and fungicide – on a keystone detritivore Asellus aquaticus Positive versus negative effects of urea – a fertilizer and fungicide – on a keystone detritivore Asellus aquaticus
title_short Positive versus negative effects of urea – a fertilizer and fungicide – on a keystone detritivore Asellus aquaticus
title_sort positive versus negative effects of urea a fertilizer and fungicide on a keystone detritivore asellus aquaticus
title_txtP Positive versus negative effects of urea – a fertilizer and fungicide – on a keystone detritivore Asellus aquaticus
topic nutrient pollution Ympäristötiede Environmental science 40151 urea lannoitteet vesien saastuminen typpi ympäristövaikutukset typpilannoitteet ammoniakki fertilisers water pollution nitrogen environmental effects nitrogenous fertilizers ammonia
topic_facet 40151 Environmental science Ympäristötiede ammonia ammoniakki environmental effects fertilisers lannoitteet nitrogen nitrogenous fertilizers nutrient pollution typpi typpilannoitteet urea vesien saastuminen water pollution ympäristövaikutukset
url https://jyx.jyu.fi/handle/123456789/96258 http://www.urn.fi/URN:NBN:fi:jyu-202407015091
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