Lena Granhag

Docent at Mechanics and Maritime Sciences, Maritime Studies, Maritime Environment and Energy Systems

Lena's background is in marine ecology working with biofouling on ship hulls. During a Marie Curie Fellowship at Plymouth Marine Laboratory in UK, Lena worked with the impact of bacterial films for development of biofouling, using the technique Fluorescence in situ Hybridization (FISH) to detect and localize different bacteria. Lena also works with marine alien species introduced with ballast water and via ship hulls and is a member of the expert group Ballast Water and Other Ship Vectors in International Marine Research Council (International Council for the Exploration of the Sea ICES).

Source: chalmers.se

Projects

2015–2017

Increased energy efficiency in ships through reduced hull fouling

Lena Granhag Maritime Environment and Energy Systems
Rickard Bensow Marine Structures and Hydrodynamics
Dinis Soares Reis de Oliveira Maritime Environment and Energy Systems
Swedish Energy Agency

2017–2018

Nutrient input to the Baltic Sea from shipping

Lena Granhag Maritime Environment and Energy Systems
Magda Wilewska-Bien Maritime Environment and Energy Systems
Karin Andersson Maritime Environment and Energy Systems
BalticSea2020

2013–2013

HELCOM ALIENS 3

Karin Andersson Maritime Environment and Energy Systems
Lena Granhag Maritime Environment and Energy Systems
Baltic Marine Environment Protection Commission (Helsonki Commission HELCOM)

There might be more projects where Lena Granhag participates, but you have to be logged in as a Chalmers employee to see them.

Publications

2016

Improving environmental performance in shipping

Selma Brynolf, Fredrik J. Lindgren, Karin Andersson et al
Shipping and the Environment: Improving Environmental Performance in Marine Transportation, p. 399-418
Chapter in monograph, book
2016

Discharges to the sea

Fredrik J. Lindgren, Magda Wilewska-Bien, Lena Granhag et al
Shipping and the Environment: Improving Environmental Performance in Marine Transportation, p. 125-168
Chapter in monograph, book
2016

Shipping and the environment

Karin Andersson, Francesco Baldi, Selma Brynolf et al
Shipping and the Environment: Improving Environmental Performance in Marine Transportation, p. 3-27
Chapter in monograph, book
2016

Matching Forces Applied in Underwater Hull Cleaning with Adhesion Strength of Marine Organisms

Dinis Oliveira, Lena Granhag,
Journal of Marine Science and Engineering. Vol. 4 (4), p. 66
Scientific journal article - peer reviewed
2016

Instantaneous Flow Structures and Opportunities for Larval Settlement: Barnacle Larvae Swim to Settle

Ann I. Larsson, Lena Granhag, Per R. Jonsson et al
PLoS ONE. Vol. 11 (7), p. e0158957
Scientific journal article - peer reviewed
2016

Future Work on Drag and Boundary Layer Properties of Biofouling Collected From Commercial Vessels

Dinis Oliveira, Lena Granhag,
1st Hull Performance & Insight Conference (HullPIC), p. 82-95
Conference paper - non peer reviewed
2016

The nutrient load from food waste generated onboard ships in the Baltic Sea

Magda Wilewska-Bien, Lena Granhag, Karin Andersson et al
Marine Pollution Bulletin. Vol. 105 (1), p. 359-366
Scientific journal article - peer reviewed
2015

Baseline survey of non-indigenous species in the Baltic Sea ports -Testing and evaluating the HELCOM-OSPAR Port Survey Protocol

Riikka Puntila, Henn Ojaveer, Lena Granhag et al
ICES Annual Science Conference
Conference paper - peer reviewed
2015

Feeding and starvation in the native ctenophore Bolinopsis infundibulum and the introduced Mnemiopsis leidyi in the North Sea: implications for ctenophore transport in ships' ballast water

Lena Granhag, Aino Hosia,
Journal of Plankton Research. Vol. 37 (5), p. 1006-1010
Scientific journal article - peer reviewed
2015

Autumnal bottom-up and top-down impacts of Cyanea capillata: a mesocosm study

Aino Hosia, Christina B. Augustin, Julie Dinasquet et al
Journal of Plankton Research. Vol. 37 (5), p. 1042-1055
Scientific journal article - peer reviewed
2014

Comparison between introduced and native ctenophores in Nordic waters -feeding rates and survival in low food conditions

Lena Granhag, Aino Hosia,
ICES International Council for Exploration of the Sea Annual Science conference
Conference paper - peer reviewed
2014

The importance of bacterial film composition for germination of zoospores of the green alga Ulva

Lena Granhag, Ian Joint,
International Congress on Marine Corrosion and Fouling, Singapore 6-10 July 2014
Conference poster
2012

Experimental feeding rates of gelatinous predators Aurelia aurita and Mnemiopsis leidyi at low northern Baltic Sea salinity

A. Hosia, Lena Granhag, T. Katajisto et al
Boreal Environment Research. Vol. 17 (6), p. 473-483
Scientific journal article - peer reviewed
2012

First recordings of the ctenophore Euplokamis sp. (Ctenophora, Cydippida) in Swedish coastal waters and molecular identification of this genus

Lena Granhag, Sanna Majaneva, Lene Friis Møller et al
Aquatic Invasions. Vol. 7 (4), p. 455-463
Scientific journal article - peer reviewed
2012

Stimulated bacterioplankton growth and selection for certain bacterial taxa in the vicinity of the ctenophore Mnemiopsis leidyi

Julie Dinasquet, Lena Granhag, Lasse Riemann et al
Frontiers in Microbiology. Vol. 3, p. Art. no. 302
Scientific journal article - peer reviewed
2012

Fouling-release of barnacles and algae from a ship hull

Lena Granhag,
International Congress on Marine Corrosion and Fouling (ICMCF), 24-28 June 2012, Seattle, WA, US
Conference paper - peer reviewed
2012

Cascading effects of the ctenophore Mnemiopsis leidyi on the planktonic food web in a nutrient-limited estuarine system

Julie Dinasquet, Josefin Titelman, Lene Friis Møller et al
Marine Ecology Progress Serie. Vol. 460, p. 49-61
Scientific journal article - peer reviewed
2011

Size-specific clearance rates of the ctenophore Mnemiopsis leidyi based on in situ gut content analyses

Lena Granhag, Lene Friis Møller, Lars Johan Hansson et al
Journal of plankton research. Vol. 33 (7), p. 1043-1052
Scientific journal article - peer reviewed
2010

Fouling-release of barnacles from a boat hull with comparison to laboratory data of attachment strength

Ann I. Larsson, Linnea Mattsson-Thorngren, Lena Granhag et al
Journal of Experimental Marine Biology and Ecology. Vol. 392 (1-2), p. 107-114
Scientific journal article - peer reviewed
2007

Algal spore settlement and sporling removal as a function of flow speed

Lena Granhag, Ann I. Larsson, Per R. Jonsson et al
Mar Ecol Prog Ser. Vol. 344, p. 63-69
Scientific journal article - peer reviewed
2006

Interactions between wave action and grazing control the distribution of intertidal macroalgae

Per R. Jonsson, Lena Granhag, P. S. Moschella et al
Ecology. Vol. 87 (5), p. 1169-1178
Scientific journal article - peer reviewed
2005

Low-crested coastal defence structures as artificial habitats for marine life: Using ecological criteria in design

P. S. Moschella, M. Abbiati, Per Åberg et al
Coastal Engineering. Vol. 52 (10-11), p. 1053-1071
Scientific journal article - peer reviewed
2004

Roughness-dependent removal of settled spores of the green alga Ulva (syn. Enteromorpha) exposed to hydrodynamic forces from a water jet

Lena Granhag, J. A. Finlay, Per R. Jonsson et al
Biofouling. Vol. 20 (2), p. 117-122
Scientific journal article - peer reviewed