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Response of a coastal tropical pelagic microbial community to changed salinity and temperature

Kaur-Kahlon, G. (author)
University of Gothenburg
Kumar, S. (author)
Indien
Rehnstam-Holm, Ann-Sofi, 1959- (author)
Högskolan Kristianstad,Avdelningen för Naturvetenskap,Forskningsmiljön Man & Biosphere Health (MABH)
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Rai, A. (author)
Indien
Bhavya, P. S. (author)
Indien
Edler, L. (author)
WEAQ Lab, Ängelholm
Singh, A. (author)
University of Gothenburg
Andersson, B. (author)
University of Gothenburg
Karunasagar, I. (author)
Indien
Ramesh, R. (author)
Indien
Godhe, A. (author)
University of Gothenburg
Edler, L (author)
Godhe, Anna, 1967 (author)
Gothenburg University,Göteborgs universitet,Institutionen för marina vetenskaper,Department of marine sciences
Bhavya, S (author)
Kumar, S (author)
Singh, Arvind (author)
Gothenburg University,Göteborgs universitet,Institutionen för marina vetenskaper,Department of marine sciences
Karunasagar, I (author)
Andersson, Björn, 1985 (author)
Gothenburg University,Göteborgs universitet,Institutionen för marina vetenskaper,Department of marine sciences
Rai, A (author)
Rengaswamy, R (author)
Kaur-Kahlon, Gurpreet (author)
Gothenburg University,Göteborgs universitet,Institutionen för marina vetenskaper,Department of marine sciences
Rehnstam-Holm, A-S (author)
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2016
2016
English.
In: Aquatic Microbial Ecology. - 0948-3055 .- 1616-1564. ; 77:1, s. 37-50
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Studies on the responses of tropical microbial communities to changing hydrographic conditions are presently poorly represented. We present here the results from a mesocosm experiment conducted in southwest (SW) coastal India to investigate how changes in temperature and salinity may affect a coastal tropic microbial community. The onset of algal and bacterial blooms, the maximum production and biomass, and the interrelation between phytoplankton and bacteria were studied in replicated mesocosms. The treatments were set up featuring ambient conditions (28 °C, 35 PSU), hyposalinity (31 PSU), warming (31 °C) and a double manipulated treatment with warming and hyposalinity (31 °C, 31 PSU). The hyposaline treatment had the most considerable influence manifested as significantly lower primary production, and the most dissimilar microphytoplankton species community. The increased temperature acted as a catalyst in the double manipulated treatment and higher primary production was maintained. We investigated the dynamics of the microbial community with a structural equation model approach, and found a significant interrelation between phytoplankton biomass and bacterial abundance. Using this methodology, it became evident that temperature and salinity changes, individually and together, mediate direct and indirect effects that influence different compartments of the microbial loop. In the face of climate change, we suggest that in relatively nutrient replete tropical coastal zones, salinity and temperature changes will affect nutrient assimilation with subsequent significant effects on the quantity of microbial biomass and production.

Subject headings

NATURAL SCIENCES  -- Biological Sciences -- Microbiology (hsv//eng)
NATURVETENSKAP  -- Biologiska vetenskaper -- Mikrobiologi (hsv//swe)
NATURVETENSKAP  -- Biologi (hsv//swe)
NATURAL SCIENCES  -- Biological Sciences (hsv//eng)

Keyword

Phytoplankton
bacteria
climate change
temperature
salinity
structural equation modeling
tropical microbial community
heterotrophic seawater mesocosms
Arabian Sea
Vibrio-Parahaemolyticus; marine-phytoplankton
ocean acidification
bacteria
dynamics
monsoon
algae
Phytoplankton
Bacteria
Climate change
Temperature
Salinity
Structural equation modeling
Tropical microbial community

Publication and Content Type

ref (subject category)
art (subject category)

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