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DOI | 10.1016/j.dsr2.2014.03.007 |
Comparison of spring-time phytoplankton community composition in two cold years from the western Gulf of Alaska into the southeastern Bering Sea | |
Stauffer, Beth A.1; Goes, Joaquim I.1; Mckee, Kali T.1; Gomes, Helga do Rosario1; Stabeno, Phyllis J.2 | |
发表日期 | 2014-11-01 |
ISSN | 0967-0645 |
卷号 | 109页码:57-70 |
英文摘要 | The Bering Sea is a highly productive ecosystem providing the main oceanographic connection between the North Pacific and Arctic oceans. The atmospheric connection with the Arctic Ocean leads to seasonal sea ice formation in the Bering Sea, the areal extent and timing of retreat of which have important implications for primary productivity and phytoplankton community composition in this region. Hydrographic data from cruises and satellite sea ice and sea surface temperature data in spring 2011 and 2012 suggest classification of these years as relatively warmer and colder years, respectively. Locations in the western Gulf of Alaska (Pavlof Bay), at the north end of an eastern pass through the Aleutian Islands (Unimak Pass), and on the continental shelf of the Bering Sea (M2) were visited in both years. Stratification was apparent on the shelf in 2012, while the water column was comparatively well-mixed at other locations in both years. Phytoplankton biomass was highest in 2011 overall and specifically on the shelf in both years, while minimal biomass was measured within the well-mixed Unimak Pass in 2012. Surface phytoplankton size distributions included substantial contributions of picoplankton (< 3 mu m) in 2011 (21-35%), while micro-(20-200 mu m) and nanoplankton (3-20 mu m) comprised 79% and 95% of biomass in Pavlof Bay and at M2, respectively, in 2012. Analyses of similarity revealed spatial variability in the phytoplankton assemblages within each year (2011: R=0.588, p < 0.004; 2012: R=0.646, p < 0.004). Additionally, between-year variability had a strong and significant effect on differences between assemblages across all locations (R=0.579, p < 0.0003), likely masking differences between sites when years were grouped (R=0.134, p < 0.079). These differences were likely driven by the dominance (up to 75% in Unimak Pass) of the colonial prymnesiophyte Phaeocystis sp. at all sites in 2011, resulting in reduced community diversity, compared to more widespread abundance of large diatoms of the genera Thalassiosira, Thalassiothrix, and Chaetoceros in 2012. The current study shows that within-regime differences in phytoplankton community composition between years can be almost as great as that between locations with vastly different oceanographic settings. High between-and multi-year variability may combine with a potential overall decline in sea ice in the Bering Sea to produce significant changes in the productive base of the food web with potential cascading effects on higher, economically and ecologically important trophic levels. (C) 2014 Elsevier Ltd. All rights reserved. |
英文关键词 | Community composition;Phytoplankton;Climatic changes;Food webs;Marine ecology |
语种 | 英语 |
WOS记录号 | WOS:000345807900006 |
来源期刊 | DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY |
来源机构 | 美国环保署 |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/58928 |
作者单位 | 1.Columbia Univ, Dept Biol & Paleo Environm, Lamont Doherty Earth Observ, Palisades, NY 10964 USA; 2.NOAA, Pacific Marine Environm Lab, Seattle, WA 98115 USA |
推荐引用方式 GB/T 7714 | Stauffer, Beth A.,Goes, Joaquim I.,Mckee, Kali T.,et al. Comparison of spring-time phytoplankton community composition in two cold years from the western Gulf of Alaska into the southeastern Bering Sea[J]. 美国环保署,2014,109:57-70. |
APA | Stauffer, Beth A.,Goes, Joaquim I.,Mckee, Kali T.,Gomes, Helga do Rosario,&Stabeno, Phyllis J..(2014).Comparison of spring-time phytoplankton community composition in two cold years from the western Gulf of Alaska into the southeastern Bering Sea.DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY,109,57-70. |
MLA | Stauffer, Beth A.,et al."Comparison of spring-time phytoplankton community composition in two cold years from the western Gulf of Alaska into the southeastern Bering Sea".DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY 109(2014):57-70. |
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