DOI: 10.1002/2014GB004846
Scopus记录号: 2-s2.0-84906531775
论文题名: Biogeochemical control of marine productivity in the Mediterranean Sea during the last 50 years
作者: Macias D ; , Garcia-Gorriz E ; , Piroddi C ; , Stips A
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2014
卷: 28, 期: 8 起始页码: 897
结束页码: 907
语种: 英语
英文关键词: biogeochemical cycles
; bottom-up control
; Mediterranean Sea
; numerical modeling
; riverine nutrient loads
Scopus关键词: biogeochemical cycle
; biological production
; catch per unit effort
; exploitation
; numerical model
; nutrient availability
; signal
; spatiotemporal analysis
; spectral analysis
; stabilization
; three-dimensional modeling
; Mediterranean Sea
英文摘要: The temporal dynamics of biogeochemical variables derived from a coupled 3-D model of the Mediterranean Sea are evaluated for the last 50 years (1960-2010) against independent data on fisheries catch per unit effort (CPUE) for the same time period. Concordant patterns are found in the time series of all of the biological variables (from the model and from fisheries statistics), with low values at the beginning of the series, a later increase, with maximum levels reached at the end of the 1990s, and a posterior stabilization. Spectral analysis of the annual biological time series reveals coincident low-frequency signals in all of them. The first, more energetic signal peaks around the year 2000, while the second, less energetic signal peaks near 1982. Almost identical low-frequency signals are found in the nutrient loads of the rivers and in the integrated nutrient levels in the surface marine ecosystem. Nitrate concentration shows a maximum level in 1998, with a later stabilization to present-day values, coincident with the first low-frequency signal found in the biological series. Phosphate shows maximum concentrations around 1982 and a posterior sharp decline, in concordance with the second low-frequency signal observed in the biological series. That result seems to indicate that the control of marine productivity (plankton to fish) in the Mediterranean is principally mediated through bottom-up processes that could be traced back to the characteristics of riverine discharges. The high sensitivity of CPUE time series to environmental conditions might be another indicator of the overexploitation of this marine ecosystem. ©2014. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77466
Appears in Collections: 气候变化事实与影响
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作者单位: Joint Research Centre, Institute for Environment and Sustainability, Water Research Unit, Ispra, Italy
Recommended Citation:
Macias D,, Garcia-Gorriz E,, Piroddi C,et al. Biogeochemical control of marine productivity in the Mediterranean Sea during the last 50 years[J]. Global Biogeochemical Cycles,2014-01-01,28(8)