![Influence of the El Nino and La Nina climate events and litter removal on inorganic nitrogen dynamics in pine forest soils on Central Java, Indonesia ... from: European Journal of Soil Biology]](https://www.ebooknetworking.net/books/B00/0PD/bigB000PDSRMU.jpg)
Influence of the El Nino and La Nina climate events and litter removal on inorganic nitrogen dynamics in pine forest soils on Central Java, Indonesia ... from: European Journal of Soil Biology]
Book Details
PublisherElsevier
ISBN / ASINB000PDSRMU
ISBN-13978B000PDSRM2
AvailabilityAvailable for download now
Sales Rank99,999,999
MarketplaceUnited States 🇺🇸
Description
This digital document is a journal article from European Journal of Soil Biology, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
To determine to what extent environmental factors and anthropogenic disturbances dictate N dynamics in tropical forest soils, changes of concentrations of inorganic N in soil were investigated during a period of extreme climatic conditions caused by El Nino and La Nina. This allowed the determination of factors driving the N-dynamics in tropical soils more clearly than during normal seasonal cycles. Three N-limited pine forests in Central Java, Indonesia, were studied monthly for over a year. N-NH"4^+ and N-NO"3^- were abundant in the organic layers, and decreased with increasing depth. Regular litter removal from the forest floor and branch-cutting at two pine forest sites significantly reduced the N-NH"4^+ concentration in the organic and mineral layers, but had only a minor influence on N-NO"3^- concentration. The N-NH"4^+ and N-NO"3^- concentrations and pH showed a distinct seasonal variation with extremely large amplitude in all studied soil layers, this corresponded to variation in soil moisture content. Concentrations were low during the extreme dry period of El Nino of 1997, and significantly increased during the subsequent long wet period of La Nina. The largest changes occurred in the organic top layers and changes were more pronounced than during normal seasonal cycles. It is concluded that N-dynamics in litter and fragmentation layers were most influenced by seasonal precipitation and to a lesser degree by litter removal.
Description:
To determine to what extent environmental factors and anthropogenic disturbances dictate N dynamics in tropical forest soils, changes of concentrations of inorganic N in soil were investigated during a period of extreme climatic conditions caused by El Nino and La Nina. This allowed the determination of factors driving the N-dynamics in tropical soils more clearly than during normal seasonal cycles. Three N-limited pine forests in Central Java, Indonesia, were studied monthly for over a year. N-NH"4^+ and N-NO"3^- were abundant in the organic layers, and decreased with increasing depth. Regular litter removal from the forest floor and branch-cutting at two pine forest sites significantly reduced the N-NH"4^+ concentration in the organic and mineral layers, but had only a minor influence on N-NO"3^- concentration. The N-NH"4^+ and N-NO"3^- concentrations and pH showed a distinct seasonal variation with extremely large amplitude in all studied soil layers, this corresponded to variation in soil moisture content. Concentrations were low during the extreme dry period of El Nino of 1997, and significantly increased during the subsequent long wet period of La Nina. The largest changes occurred in the organic top layers and changes were more pronounced than during normal seasonal cycles. It is concluded that N-dynamics in litter and fragmentation layers were most influenced by seasonal precipitation and to a lesser degree by litter removal.
