Academic Journal

Loss of soil carbon and nitrogen indicates climate change-induced alterations in a temperate forest ecosystem

التفاصيل البيبلوغرافية
العنوان: Loss of soil carbon and nitrogen indicates climate change-induced alterations in a temperate forest ecosystem
المؤلفون: Setälä, Heikki, Sun, Zhong Jie, Zheng, Jun Qiang, Lu, Changyi, Cui, Ming Ming, Han, Shi Jie
المساهمون: Ecosystems and Environment Research Programme, Helsinki Institute of Urban and Regional Studies (Urbaria), Helsinki Institute of Sustainability Science (HELSUS), Heikki Setälä / Principal Investigator, Urban Ecosystems
بيانات النشر: Elsevier Scientific Publ. Co
سنة النشر: 2023
المجموعة: Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto
مصطلحات موضوعية: Above-ground litter manipulation, Climate warming, Long-term study, Priming effect, Soil biota, Environmental sciences
الوصف: Climate warming is expected to influence terrestrial biogeochemical cycles by modifying the quality and quantity of plant litter input to soils. Although a growing number of studies recognize the importance of plant litter input in influencing the loss of soil organic matter (SOM) through a phenomenon called the priming effect (PE), the exact mechanisms behind PE are not well known. Importantly, most PE research is based on short term pot experiments in which fresh organic matter (FOM) input is represented by a single addition of compounds of unnaturally simple chemical composition. Furthermore, only a few studies exist in which the PE was explored in terms of organic C (SOC) and total N content in the soil. Here, we report results of a 3-year long litter manip-ulation study conducted under natural conditions in a broadleaved Korean pine forest in N-E China. We show that the extra supply (twice the normal input) of aboveground tree litter composing of conifer needles, leaves and small twigs was associated not only with slightly decreased SOC (by 5%) but especially that of soil total N (STN) (by 15%) content in the top soil (0-5 cm depth). In contrast, removal of litter resulted in an increased (ca. 15%) amount of both SOC and STN during the study when compared to control soils receiving natural litter input. Despite the enhanced leaf litter decomposition rate in the treatment receiving extra litter, the changes in SOC and STN were related neither to soil microbial biomass nor to community composition. The amount of N lost (40.0 g m- 2) in the soil due to litter addition was ca. three times the amount of N added (12.3 g m- 2) via the litter, while the amount of C lost (238 g m- 2) was about one third of that added (940 g m- 2), suggesting that soil N in our research site is more prone to the PE than soil C. As we did not manipulate belowground FOM input, our results suggest that input of aboveground litter rather than that by roots explained the PE in our study. Results of our long-term study conducted under ...
نوع الوثيقة: article in journal/newspaper
وصف الملف: application/pdf
اللغة: English
Relation: http://hdl.handle.net/10138/356845; 85149184241; 000949976700001
الاتاحة: http://hdl.handle.net/10138/356845
Rights: cc_by_nc_nd ; info:eu-repo/semantics/openAccess ; openAccess
رقم الانضمام: edsbas.1BE26F9C
قاعدة البيانات: BASE