Does different versus equal daytime and night-time respiration matter for quantification of lake metabolism using diel dissolved oxygen cycles?
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Dosyalar
Tarih
2011
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Cambridge Univ Press
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Diel dissolved oxygen (DO) measurements can be used to estimate water metabolism of aquatic systems, in particular, lakes, lagoons and streams in terms of gross primary production (GPP), ecosystem respiration (R(eco)) and net ecosystem production (NEP). One of the main assumptions in the calculation of lake metabolism is that R(eco) is the same for daytime (R(daytime)) and nighttime (R(darkhr)). This study aimed at testing the equal R(daytime) and R(darkhr) assumption to estimate GPP, R(eco) and NEP in a littoral zone of a temperate shallow lake (Lake Yenicaga) in northwestern Turkey with and without the assumption. Based on the equal R(darkhr) and R(daytime) assumption, values calculated for GPP and R(daytime) were different than those based on the different R(darkhr) and R(daytime) assumption (P<0.001). GPP was lower by 7.5% in July, 49.6% in September and 14.9% in October, while R(eco) was lower by 5.9% in July and 55.8% in September. GPP was higher by 8.9% in August and 55% in November, while R(eco) was higher by 7.8% in August and 23.9% in November.
Açıklama
Anahtar Kelimeler
Aquatic Ecosystems, Diel Dissolved Oxygen, Ecosystem Respiration, Lake Metabolism, Shallow Lake
Kaynak
Annales De Limnologie-International Journal Of Limnology
WoS Q Değeri
Q3
Scopus Q Değeri
Q3
Cilt
47
Sayı
3
