Growth and mortality rates of picophytoplankton in the Baltic Sea Proper

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Alegria Zufia, Javier,Ph.D.1992-Linnéuniversitetet,Institutionen för biologi och miljö (BOM),Ctr Ecol & Evolut Microbial Model Syst EEMiS,Centre for Ecology and Evolution in Microbial model Systems—EEMiS, Department of Biology and Environmental Science, Linnæus University, Kalmar, Sweden,EcoChange (author)

Growth and mortality rates of picophytoplankton in the Baltic Sea Proper

Article/chapterEnglish2024

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Oldendorf :Inter-Research,2024
printrdacarrier

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LIBRIS-ID:oai:DiVA.org:lnu-129511
https://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-129511URI
https://doi.org/10.3354/meps14572DOI
https://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-53414URI
https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-224347URI

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Language:English
Summary in:English

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Subject category:art swepub-publicationtype

Notes

Picophytoplankton (<2 µm diameter), a diverse group of picocyanobacteria and photosynthetic picoeukaryotes, are significant contributors to primary production. Predatory mortality controls picophytoplankton biomass and thereby energy transfer in the marine food web. The 2 major pathways of picophytoplankton mortality are grazing and viral lysis. Grazing passes carbon directly to higher trophic levels, while lysis products are passed into the viral loop. Picophytoplankton are abundant in the Baltic Sea but little is known about their predatory mortality. Using a modification of the dilution approach, we calculated growth and mortality rates of picophytoplankton and studied the effect of predation on community structure during late August and September. The experiments were conducted coinciding with the peak in picophytoplankton abundance (similar to 10(5) cells ml(-1)) at the Linnaeus Microbial Observatory in the Baltic Sea Proper. The results showed that grazing is an important controller of picocyanobacteria and photosynthetic picoeukaryote populations, while no significant viral lysis effect was detected. Grazing on picocyanobacteria was proportional to growth rates, while grazing on photosynthetic picoeukaryotes exceeded growth. Selective grazing of phylogenetically distinct picocyanobacterial clades had a significant effect on community structure, suggesting that grazing has an impact on the seasonal dynamics of co-occurring clades. Picocyanobacteria had a higher carbon transfer contribution to higher trophic levels than photosynthetic picoeukaryotes at the time of the experiments. The study shows that picophytoplankton are important contributors to carbon cycling in the Baltic Sea microbial food web and should be considered for future ecological models.

Subject headings and genre

NATURVETENSKAP Biologi Ekologi hsv//swe
NATURAL SCIENCES Biological Sciences Ecology hsv//eng
NATURVETENSKAP Biologi hsv//swe
NATURAL SCIENCES Biological Sciences hsv//eng
Picophytoplankton
Picoeukaryotes
Synechococcus
Grazing
Viral lysis
Carbon transfer
Baltic Sea
Akvatisk ekologi
Aquatic Ecology
Mikrobiologi
Microbiology

Added entries (persons, corporate bodies, meetings, titles ...)

Laber, Christien P.Linnéuniversitetet,Institutionen för biologi och miljö (BOM),Ctr Ecol & Evolut Microbial Model Syst EEMiS,Centre for Ecology and Evolution in Microbial model Systems—EEMiS, Department of Biology and Environmental Science, Linnæus University, Kalmar, Sweden(Swepub:lnu)chlaaa (author)
Legrand, Catherine,Professor,1965-Högskolan i Halmstad,Linnéuniversitetet,Institutionen för biologi och miljö (BOM),Centre for Ecology and Evolution in Microbial model Systems—EEMiS, Department of Biology and Environmental Science, Linnæus University, Kalmar, Sweden; School of Business, Innovation and Sustainability, Halmstad University, Halmstad, Sweden,Ctr Ecol & Evolut Microbial Model Syst EEMiS,Akademin för företagande, innovation och hållbarhet,Linnaeus University, Kalmar, Sweden,EcoChange(Swepub:hh)catleg (author)
Lindehoff, ElinLinnéuniversitetet,Institutionen för biologi och miljö (BOM),Ctr Ecol & Evolut Microbial Model Syst EEMiS,Centre for Ecology and Evolution in Microbial model Systems—EEMiS, Department of Biology and Environmental Science, Linnæus University, Kalmar, Sweden(Swepub:lnu)ekiel (author)
Farnelid, Hanna,1983-Linnéuniversitetet,Institutionen för biologi och miljö (BOM),Ctr Ecol & Evolut Microbial Model Syst EEMiS,Centre for Ecology and Evolution in Microbial model Systems—EEMiS, Department of Biology and Environmental Science, Linnæus University, Kalmar, Sweden(Swepub:lnu)efaha (author)
LinnéuniversitetetInstitutionen för biologi och miljö (BOM) (creator_code:org_t)

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In:Marine Ecology Progress SeriesOldendorf : Inter-Research735, s. 63-760171-86301616-1599

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