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Title

Influence of glacier type on bloom phenology in two Southwest Greenland fjords

Author
Corresponding AuthorStuart-Lee,A. E.
Publication Years
2023-05-05
DOI
Source Title
ISSN
0272-7714
EISSN
1096-0015
Volume284
Abstract
Along Greenland's coastline, the magnitude and timing of primary production in fjords is influenced by meltwater release from marine-terminating glaciers. How local ecosystems will adapt as these glaciers retreat onto land, forcing fundamental changes in hydrography, remains an open question. To further our understanding of this transition, we examine how marine- and land-terminating glaciers respectively influence fjord bloom phenology. Between spring and autumn 2019, we conducted along-fjord transects of hydrographic variables, biogeochemical properties and pico- and nanophytoplankton counts to illustrate the contrasting seasonal bloom dynamics in the fjords Nuup Kangerlua and Ameralik. These fjords are in the same climatic region of west Greenland but influenced by different glacial structures. Nuup Kangerlua, a predominantly marine-terminating system, was differentiated by its sustained second summer bloom and high Chl a fluorescence in summer and autumn. In Ameralik, influenced by a land-terminating glacier, we found higher abundances of pico- and nanophytoplankton, and high cyanobacteria growth in autumn. The summer bloom in Nuup Kangerlua is known to be coincident with subglacial freshwater discharge sustaining renewed nutrient supply to the fjord. We observe here that the intermediate baroclinic circulation, which creates an inflow at subsurface depths, also plays an important role in increasing nutrient availability at shallower depths and potentially explains the distribution of primary producers. Our observations suggest that the retreat of marine-terminating glaciers onto land, with consequent increases in surface water temperature and stratification, and reduced light availability, may alter the magnitude, composition, and distribution of summer productivity.
URL[Source Record]
Indexed By
Language
English
SUSTech Authorship
Others
Funding Project
Deutsche Forschungsgemeinschaft[6321/1-1];
WOS Research Area
Marine & Freshwater Biology ; Oceanography
WOS Subject
Marine & Freshwater Biology ; Oceanography
WOS Accession No
WOS:001029159800001
Publisher
ESI Research Field
PLANT & ANIMAL SCIENCE
Scopus EID
2-s2.0-85150761300
Data Source
Scopus
Citation statistics
Cited Times [WOS]:1
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/524142
DepartmentDepartment of Ocean Science and Engineering
Affiliation
1.Department of Estuarine and Delta Systems,Royal Netherlands Institute for Sea Research,Yerseke,Netherlands
2.Greenland Climate Research Centre,Greenland Institute of Natural Resources,Nuuk,Greenland
3.Department of Earth Sciences,Geosciences,Utrecht University,Utrecht,Netherlands
4.Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen,China
5.Marine Biogeochemistry,GEOMAR Helmholtz Centre for Ocean Research Kiel,Kiel,Germany
Recommended Citation
GB/T 7714
Stuart-Lee,A. E.,Mortensen,J.,Juul-Pedersen,T.,et al. Influence of glacier type on bloom phenology in two Southwest Greenland fjords[J]. Estuarine, Coastal and Shelf Science,2023,284.
APA
Stuart-Lee,A. E..,Mortensen,J..,Juul-Pedersen,T..,Middelburg,J. J..,Soetaert,K..,...&Meire,L..(2023).Influence of glacier type on bloom phenology in two Southwest Greenland fjords.Estuarine, Coastal and Shelf Science,284.
MLA
Stuart-Lee,A. E.,et al."Influence of glacier type on bloom phenology in two Southwest Greenland fjords".Estuarine, Coastal and Shelf Science 284(2023).
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