DOI: 10.1016/j.csr.2019.104045
论文题名: Glacial and depth influence on sublittoral macroalgal standing stock in a high-Arctic fjord
作者: Ronowicz M. ; Włodarska-Kowalczuk M. ; Kukliński P.
刊名: Continental Shelf Research
ISSN: 2784343
出版年: 2020
卷: 194 语种: 英语
英文关键词: Arctic
; Biomass
; Glacial disturbance
; Kelp
; Sedimentation
; Standing stock
Scopus关键词: abundance
; community composition
; deglaciation
; fjord
; glacial deposit
; kelp forest
; macroalga
; sedimentation
; stand structure
; Arctic
; Alaria esculenta
; Laminaria digitata
; Laminariales
; Phycodrys rubens
; Saccharina latissima
英文摘要: The motivation behind this study is the progression of global warming, which severely affects the entire Arctic and could have effects on macroalgal assemblages. Three sampling sites were located at different distances to glacier fronts to study the effect of glacial exposure on macroalgal community composition and standing stock. In addition, the variability between two depths (5 and 10 m) was investigated. The subtidal communities at each site and depth were dominated by brown macroalgae of the order Laminariales, which made up over 95% of the macroalgal biomass and at least 65% of the macroalgal abundance at each site. The mean macroalgal species richness and abundance were reduced at glacially impacted sites, but the differences were not statistically significant. The community structure based on abundance data varied between the clear and glacially exposed sites due to the higher abundances of Laminaria digitata, Phycodrys rubens and Alaria esculenta at the clear site and Saccharina latissima at the glacial sites. The biomass structure did not vary between sites. The kelp biomass distribution between depths was patchy and dependent on water properties. The maximum biomass was observed at the depth of 10 m at the clear site, while it was observed at shallower depths at the glacial sites. As deglaciation proceeds, new seabed areas are uncovered, and the number of ice-free days grows, creating favourable conditions for macroalgal expansion. However, due to increased turbidity close to the glacier fronts, decreases in species richness, abundance and biomass of macroalgae are likely to occur, as well as the reorganization of the community structure. Such changes may intensify with continued Arctic warming. The hypothesis about reduction of macrophyte abundance and biomass due to the glacial impact was not supported by our data. © 2020 The Authors Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159960
Appears in Collections: 气候变化与战略
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作者单位: Institute of Oceanology Polish Academy of Sciences, Poland, Marine Ecology Department, Poland; Department of Life Sciences, The Natural History Museum, United Kingdom
Recommended Citation:
Ronowicz M.,Włodarska-Kowalczuk M.,Kukliński P.. Glacial and depth influence on sublittoral macroalgal standing stock in a high-Arctic fjord[J]. Continental Shelf Research,2020-01-01,194