Arid
DOI10.1007/s11273-022-09856-6
Soil properties across a hydrological gradient in saladas from northeast Spain: what are the implications for soil carbon stocks, CO2 efflux and microbial communities in a warming world?
Thomas, A. D.; Tooth, S.; Lan, S.; Holt, T.; Saunders, I; Tarren, H.
Corresponding AuthorThomas, AD (corresponding author),Aberystwyth Univ, Dept Geog & Earth Sci, Earth Surface Proc Res Grp, Aberystwyth SY23 3DB, Dyfed, Wales.
JournalWETLANDS ECOLOGY AND MANAGEMENT
ISSN0923-4861
EISSN1572-9834
Year Published2022-02
Abstract in EnglishNumerous permanent and temporary wetlands occur throughout the world's drylands. Although characterised by diverse water inundation frequencies, durations and depths, these wetlands in drylands are typically hotspots of biological activity and productivity. The healthy functioning and even existence of many wetlands in drylands, however, is threatened by desiccation resulting from a combination of climate change and human disturbance. Near Alcaniz in arid northeast Spain, three adjacent saladas (playas) with contrasting hydroperiods provide an opportunity to investigate how moisture availability affects their soil carbon (C) stocks, CO2 efflux, and microbial communities. Predicting the impacts of changes in moisture availability on the C cycle in wetlands in drylands is challenging but important because many contain large C stocks and may be significant sources and sinks of greenhouse gases. Frequent inundation and/or near-permanent soil water saturation supports the generation of organic C from a range of different sources. Soil inorganic C was greatest on the driest salada (3.8%) compared to the wetter saladas (3.0% and 2.1%) owing to evaporative concentration and the reaction of CO2 with available Ca2+, Mg2+ and Na+ ions. CO2 efflux was greatest at intermediate moisture levels (142 mg CO2 m(-2) h(-1)), but the spatial and temporal variability in CO2 efflux on salada surfaces is large, demonstrating the need for intensive sampling regimes to provide realistic estimates of their contribution to atmospheric CO2 exchanges. Different microbial community structures also characterise each salada. The saladas near Alcaniz, and many other similar features in northeast Spain, are renowned for their rare and threatened flora and fauna, yet their soil C cycle characteristics and soil microbial communities provide additional reasons to monitor the impacts of climate change and protect these vulnerable environments from further anthropogenic disturbances.
Keyword in EnglishSaladas Soil carbon CO2 efflux Microbial communities Hydroperiods
SubtypeArticle ; Early Access
Language英语
OA Typehybrid
Indexed BySCI-E
WOS IDWOS:000753774900001
WOS KeywordCENTRAL EBRO BASIN ; SALINE WETLANDS ; CLIMATE-CHANGE ; PLAYA-LAKES ; MONEGROS DESERT ; CLOSED-BASIN ; EVOLUTION ; RESPONSES ; MOISTURE ; SEQUESTRATION
WOS SubjectEnvironmental Sciences ; Water Resources
WOS Research AreaEnvironmental Sciences & Ecology ; Water Resources
Document Type期刊论文
Identifierhttp://119.78.100.177/qdio/handle/2XILL650/377315
Affiliation[Thomas, A. D.; Tooth, S.; Lan, S.; Saunders, I; Tarren, H.] Aberystwyth Univ, Dept Geog & Earth Sci, Earth Surface Proc Res Grp, Aberystwyth SY23 3DB, Dyfed, Wales; [Lan, S.] Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Peoples R China; [Holt, T.] Aberystwyth Univ, Ctr Glaciol, Dept Geog & Earth Sci, Aberystwyth SY23 3DB, Dyfed, Wales
Recommended Citation
GB/T 7714
Thomas, A. D.,Tooth, S.,Lan, S.,et al. Soil properties across a hydrological gradient in saladas from northeast Spain: what are the implications for soil carbon stocks, CO2 efflux and microbial communities in a warming world?[J],2022.
APA Thomas, A. D.,Tooth, S.,Lan, S.,Holt, T.,Saunders, I,&Tarren, H..(2022).Soil properties across a hydrological gradient in saladas from northeast Spain: what are the implications for soil carbon stocks, CO2 efflux and microbial communities in a warming world?.WETLANDS ECOLOGY AND MANAGEMENT.
MLA Thomas, A. D.,et al."Soil properties across a hydrological gradient in saladas from northeast Spain: what are the implications for soil carbon stocks, CO2 efflux and microbial communities in a warming world?".WETLANDS ECOLOGY AND MANAGEMENT (2022).
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