Effects of elevated CO2 and temperature on plant litter decomposition in freshwaters – a meta-analysis. / Efeitos do aumento da cocnetração de CO2 e da temperatura na decomposição de detritos vegetais em sistemas aquáticos de água doce – uma meta-análise

Bibliographic Details
Main Author: Mabano, Amani
Publication Date: 2018
Format: Master thesis
Language: eng
Source: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
Download full: https://hdl.handle.net/10316/86100
Summary: Dissertação de Mestrado em Ecologia apresentada à Faculdade de Ciências e Tecnologia
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network_name_str Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
repository_id_str https://opendoar.ac.uk/repository/7160
spelling Effects of elevated CO2 and temperature on plant litter decomposition in freshwaters – a meta-analysis. / Efeitos do aumento da cocnetração de CO2 e da temperatura na decomposição de detritos vegetais em sistemas aquáticos de água doce – uma meta-análiseEffects of elevated CO2 and temperature on plant litter decomposition in freshwaters – a meta-analysis. / Efeitos do aumento da cocnetração de CO2 e da temperatura na decomposição de detritos vegetais em sistemas aquáticos de água doce – uma meta-análiseMeta-analysisligninclimate changehyphomycetesshreddersMeta-analysisligninclimate changehyphomycetesshreddersDissertação de Mestrado em Ecologia apresentada à Faculdade de Ciências e TecnologiaElevated atmospheric [CO2] can affect litter decomposition by (1) decreasing litter quality and (2) increasing temperature. At elevated [CO2], plants tend to over-invest in secondary and structural compounds, resulting in low-quality litter (tougher litter, higher lignin concentration, and lower N:C ratio). These compounds decrease litter decomposition rates because of their bitter taste, toxicity and interference with digestion of litter decomposers (microbes and macroinvertebrates). On the other hand, elevated temperature can increase litter decomposition rates by increasing leaching of the recalcitrant compounds and metabolic rates of litter decomposers. However, it is not understood how litter decomposition responds to increases in both [CO2] and temperature. This study tested the hypothesis that the overall effect size of elevated [CO2] and temperature is significant and positive. The findings of 43 published and unpublished studies conducted worldwide, between 1993 and 2017, on the effects of elevated [CO2], elevated temperature or both on litter decomposition in freshwaters are synthesized by meta-analysis. After estimating the standardized mean difference between litter decomposition rates reported in impacted (increases in CO2, temperature or both) and control conditions, the overall effect size of elevated atmospheric [CO2] and temperature on litter decomposition in freshwaters was positive. However, elevated atmospheric [CO2] decreased litter decomposition, temperature+CO2 did not affect litter decomposition, while elevated temperature increased litter decomposition. The effect of elevated temperature did not depend on the type of study (laboratory vs. field). Elevated [CO2] inhibited litter decomposition in lentic, but not lotic systems. The effects of elevated atmospheric [CO2], temperature and temperature+CO2 on litter decomposition were species-specific. The type of community did not affect the response of litter decomposition to elevated atmospheric [CO2] and temperature. Faster decomposition rates might reduce food availability for higher trophic consumers under future global warming scenarios. However, conclusions are geographically limited since most of the primary studies were conducted in Europe, suggesting a need for studies in other parts of the world.Elevated atmospheric [CO2] can affect litter decomposition by (1) decreasing litter quality and (2) increasing temperature. At elevated [CO2], plants tend to over-invest in secondary and structural compounds, resulting in low-quality litter (tougher litter, higher lignin concentration, and lower N:C ratio). These compounds decrease litter decomposition rates because of their bitter taste, toxicity and interference with digestion of litter decomposers (microbes and macroinvertebrates). On the other hand, elevated temperature can increase litter decomposition rates by increasing leaching of the recalcitrant compounds and metabolic rates of litter decomposers. However, it is not understood how litter decomposition responds to increases in both [CO2] and temperature. This study tested the hypothesis that the overall effect size of elevated [CO2] and temperature is significant and positive. The findings of 43 published and unpublished studies conducted worldwide, between 1993 and 2017, on the effects of elevated [CO2], elevated temperature or both on litter decomposition in freshwaters are synthesized by meta-analysis. After estimating the standardized mean difference between litter decomposition rates reported in impacted (increases in CO2, temperature or both) and control conditions, the overall effect size of elevated atmospheric [CO2] and temperature on litter decomposition in freshwaters was positive. However, elevated atmospheric [CO2] decreased litter decomposition, temperature+CO2 did not affect litter decomposition, while elevated temperature increased litter decomposition. The effect of elevated temperature did not depend on the type of study (laboratory vs. field). Elevated [CO2] inhibited litter decomposition in lentic, but not lotic systems. The effects of elevated atmospheric [CO2], temperature and temperature+CO2 on litter decomposition were species-specific. The type of community did not affect the response of litter decomposition to elevated atmospheric [CO2] and temperature. Faster decomposition rates might reduce food availability for higher trophic consumers under future global warming scenarios. However, conclusions are geographically limited since most of the primary studies were conducted in Europe, suggesting a need for studies in other parts of the world.2018-07-19info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesishttps://hdl.handle.net/10316/86100https://hdl.handle.net/10316/86100TID:202204944engMabano, Amaniinfo:eu-repo/semantics/openAccessreponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiainstacron:RCAAP2022-01-21T17:34:16Zoai:estudogeral.uc.pt:10316/86100Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireinfo@rcaap.ptopendoar:https://opendoar.ac.uk/repository/71602025-05-29T05:33:27.900266Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiafalse
dc.title.none.fl_str_mv Effects of elevated CO2 and temperature on plant litter decomposition in freshwaters – a meta-analysis. / Efeitos do aumento da cocnetração de CO2 e da temperatura na decomposição de detritos vegetais em sistemas aquáticos de água doce – uma meta-análise
Effects of elevated CO2 and temperature on plant litter decomposition in freshwaters – a meta-analysis. / Efeitos do aumento da cocnetração de CO2 e da temperatura na decomposição de detritos vegetais em sistemas aquáticos de água doce – uma meta-análise
title Effects of elevated CO2 and temperature on plant litter decomposition in freshwaters – a meta-analysis. / Efeitos do aumento da cocnetração de CO2 e da temperatura na decomposição de detritos vegetais em sistemas aquáticos de água doce – uma meta-análise
spellingShingle Effects of elevated CO2 and temperature on plant litter decomposition in freshwaters – a meta-analysis. / Efeitos do aumento da cocnetração de CO2 e da temperatura na decomposição de detritos vegetais em sistemas aquáticos de água doce – uma meta-análise
Mabano, Amani
Meta-analysis
lignin
climate change
hyphomycetes
shredders
Meta-analysis
lignin
climate change
hyphomycetes
shredders
title_short Effects of elevated CO2 and temperature on plant litter decomposition in freshwaters – a meta-analysis. / Efeitos do aumento da cocnetração de CO2 e da temperatura na decomposição de detritos vegetais em sistemas aquáticos de água doce – uma meta-análise
title_full Effects of elevated CO2 and temperature on plant litter decomposition in freshwaters – a meta-analysis. / Efeitos do aumento da cocnetração de CO2 e da temperatura na decomposição de detritos vegetais em sistemas aquáticos de água doce – uma meta-análise
title_fullStr Effects of elevated CO2 and temperature on plant litter decomposition in freshwaters – a meta-analysis. / Efeitos do aumento da cocnetração de CO2 e da temperatura na decomposição de detritos vegetais em sistemas aquáticos de água doce – uma meta-análise
title_full_unstemmed Effects of elevated CO2 and temperature on plant litter decomposition in freshwaters – a meta-analysis. / Efeitos do aumento da cocnetração de CO2 e da temperatura na decomposição de detritos vegetais em sistemas aquáticos de água doce – uma meta-análise
title_sort Effects of elevated CO2 and temperature on plant litter decomposition in freshwaters – a meta-analysis. / Efeitos do aumento da cocnetração de CO2 e da temperatura na decomposição de detritos vegetais em sistemas aquáticos de água doce – uma meta-análise
author Mabano, Amani
author_facet Mabano, Amani
author_role author
dc.contributor.author.fl_str_mv Mabano, Amani
dc.subject.por.fl_str_mv Meta-analysis
lignin
climate change
hyphomycetes
shredders
Meta-analysis
lignin
climate change
hyphomycetes
shredders
topic Meta-analysis
lignin
climate change
hyphomycetes
shredders
Meta-analysis
lignin
climate change
hyphomycetes
shredders
description Dissertação de Mestrado em Ecologia apresentada à Faculdade de Ciências e Tecnologia
publishDate 2018
dc.date.none.fl_str_mv 2018-07-19
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://hdl.handle.net/10316/86100
https://hdl.handle.net/10316/86100
TID:202204944
url https://hdl.handle.net/10316/86100
identifier_str_mv TID:202204944
dc.language.iso.fl_str_mv eng
language eng
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eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron:RCAAP
instname_str FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron_str RCAAP
institution RCAAP
reponame_str Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
collection Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
repository.name.fl_str_mv Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
repository.mail.fl_str_mv info@rcaap.pt
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