Affiliation:
1. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing
2. Yale University
3. University of Waikato
Abstract
The marine phosphorus cycle plays a critical role in regulating rates of primary productivity and thus the size of the marine biosphere. Yet, the cumulative effects of temperature change—and warming, in particular—on marine phosphorus burial remain poorly understood. Here, we explore a benthic biogeochemical model that accounts for the compounded effect of temperature on the kinetics of key diagenetic reaction pathways, diffusion coefficients, seawater pH, dissolved O2 concentration and bioturbation, in order to provide a new predictive framework for understanding the temperature response associated with P burial in continental margin settings. We find that temperature has a direct and positive impact on marine phosphorus burial, as it directly increases the formation rate of key mineral P-removal pathways—foremost carbonate fluorapatite (CFA). The increase in authigenic P burial during climate warming is likely to partially counter the effects of increased water-column P regeneration rate during climate warming events, and thus influence the extent of oceanic anoxia and organic matter burial, a factor that should be considered when assessing the response of the P cycle in the face of warming.
Publisher
American Journal of Science (AJS)
Subject
General Earth and Planetary Sciences
Reference102 articles.
1. A peaked function for modeling temperature dependence of plant productivity;Georgii A. Alexandrov;Ecological Modelling,2007
2. Influence of macrobenthos on chemical diagenesis of marine sediments. (Order No. 7727800);Robert C. Aller,1977
3. Diagenetic processes near the sediment–water interface of Long Island Sound, I. Decomposition and nutrient element geochemistry (S,N,P);Robert C. Aller;Advances in Geophysics,1980
4. Quantifying the degradation of organic matter in marine sediments: A review and synthesis;Sandra Arndt;Earth-Science Reviews,2013
5. Temperature dependence of microbial degradation of organic matter in marine sediments:polysaccharide hydrolysis, oxygen consumption, and sulfate reduction;C Arnosti;Marine Ecology Progress Series,1998
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献