DOI: 10.1111/gcb.14161
Scopus记录号: 2-s2.0-85046246173
论文题名: Recurrent seascape units identify key ecological processes along the western Antarctic Peninsula
作者: Bowman J.S. ; Kavanaugh M.T. ; Doney S.C. ; Ducklow H.W.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 7 起始页码: 3065
结束页码: 3078
语种: 英语
英文关键词: Antarctic
; marine ecosystems
; nutrients
; Palmer Long-Term Ecological Research
; seascapes
Scopus关键词: chlorophyll a
; climate change
; ecological approach
; ecosystem approach
; interdisciplinary approach
; marine ecosystem
; nutrient dynamics
; research work
; spatiotemporal analysis
; Antarctic Peninsula
; Antarctica
; West Antarctica
; Sus
英文摘要: The western Antarctic Peninsula (WAP) is a bellwether of global climate change and natural laboratory for identifying interactions between climate and ecosystems. The Palmer Long-Term Ecological Research (LTER) project has collected data on key ecological and environmental processes along the WAP since 1993. To better understand how key ecological parameters are changing across space and time, we developed a novel seascape classification approach based on in situ temperature, salinity, chlorophyll a, nitrate + nitrite, phosphate, and silicate. We anticipate that this approach will be broadly applicable to other geographical areas. Through the application of self-organizing maps (SOMs), we identified eight recurrent seascape units (SUs) in these data. These SUs have strong fidelity to known regional water masses but with an additional layer of biogeochemical detail, allowing us to identify multiple distinct nutrient profiles in several water masses. To identify the temporal and spatial distribution of these SUs, we mapped them across the Palmer LTER sampling grid via objective mapping of the original parameters. Analysis of the abundance and distribution of SUs since 1993 suggests two year types characterized by the partitioning of chlorophyll a into SUs with different spatial characteristics. By developing generalized linear models for correlated, time-lagged external drivers, we conclude that early spring sea ice conditions exert a strong influence on the distribution of chlorophyll a and nutrients along the WAP, but not necessarily the total chlorophyll a inventory. Because the distribution and density of phytoplankton biomass can have an impact on biomass transfer to the upper trophic levels, these results highlight anticipated links between the WAP marine ecosystem and climate. © 2018 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110354
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
There are no files associated with this item.
作者单位: Scripps Institution of Oceanography, La Jolla, CA, United States; Oregon State University, Corvallis, OR, United States; University of Virginia, Charlottesville, VA, United States; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States
Recommended Citation:
Bowman J.S.,Kavanaugh M.T.,Doney S.C.,et al. Recurrent seascape units identify key ecological processes along the western Antarctic Peninsula[J]. Global Change Biology,2018-01-01,24(7)