Spatial and temporal variations in diurnal CO2 fluxes of different Mediterranean ecosystems in Turkey

Basit Öğe Kaydı
dc.authoridEvrendilek, Fatih/0000-0003-1099-4363
dc.contributor.authorEvrendilek, F
dc.contributor.authorBen-Asher, J
dc.contributor.authorAydin, M
dc.contributor.authorÇelik, I
dc.date.accessioned2024-09-18T21:05:05Z
dc.date.available2024-09-18T21:05:05Z
dc.date.issued2005
dc.departmentHatay Mustafa Kemal Üniversitesien_US
dc.description.abstractDiurnal rates of net CO2 assimilation (P-N) and soil respiration (R-h) in the summer were measured in six Mediterranean ecosystems through an automatic continuous monitoring system. The six sites include a typical evergreen Pinus pinea L. forest with two co-occurring sclerophyllous shrubs (Pistacia terebinthus L. and Phillyrea latifiolia L.), citrus (Citrus Union L.), corn (Zea mays L.), cotton (Gossypium hirsutum L.), soybean (Glycine max L.) and vineyard (Vitis vinifera L.). All six sites exhibited similar behaviour in that low soil water availability and high evaporative demand not only depressed P-N and R-h, rates, but also changed the diurnal time course of their peak rates. Except for P. terebinthus and corn, P-N rates of all the species peaked in the morning (7:30-9:30), and R-h, rates in all the sites were higher during the night than during the day (p < 0.05). Mean rates of net ecosystem emission (NEE) Of CO2 to the atmosphere were highest (-23.9 mu mol CO2 m(-2) s(-1)) in the corn site and lowest (-0.6 mu mol CO2 m(-2) s(-1)) in the vineyard site. On average, all six ecosystems were a net source of CO2 to the atmosphere, due to R-h effluxes exceeding P-N rates. Net CO2 assimilation and R-h explained 25% (for corn) to 87% (for citrus) of the diurnal fluctuations of the atmospheric CO2 concentration. Multiple linear regression (MLR) models accounted for 42% (P. pinea) to 95% (cotton) of diurnal variations in P-N rates and 30% (forest) to 92% (citrus) of diurnal variations in R-h rates (p <= 0.001). The dependence of diurnal P-N and R-h rates on water vapour pressure deficit and soil water deficit for dry and hot summer days appeared to be major and needs to be re-examined for biogeochemical models of climate change effects on CO2 dynamics of Mediterranean ecosystems.en_US
dc.identifier.doi10.1039/b415152f
dc.identifier.endpage157en_US
dc.identifier.issn1464-0325
dc.identifier.issn1464-0333
dc.identifier.issue2en_US
dc.identifier.scopus2-s2.0-14644410440en_US
dc.identifier.scopusqualityN/Aen_US
dc.identifier.startpage151en_US
dc.identifier.urihttps://doi.org/10.1039/b415152f
dc.identifier.urihttps://hdl.handle.net/20.500.12483/13344
dc.identifier.volume7en_US
dc.identifier.wosWOS:000227279500016en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherRoyal Soc Chemistryen_US
dc.relation.ispartofJournal of Environmental Monitoringen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectClimateen_US
dc.subjectCarbonen_US
dc.subjectRespirationen_US
dc.titleSpatial and temporal variations in diurnal CO2 fluxes of different Mediterranean ecosystems in Turkeyen_US
dc.typeArticleen_US

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