Distribution and sources of particulate organic matter in a mesoscale eddy dipole in the Mozambique Channel (south-western Indian Ocean): Insight from C and N stable isotopes

Latitudinal δ13C and δ15N variations in particulate organic matter (POM) in surface waters from the Indian ocean sector of Southern Ocean and the Tropical Indian Ocean in 2012

“…Previous studies by Kolasinski et al (2012) in eddy prone Mozambique channel have observed heavier G 13 C (POM) and δ 15 N (POM) within the eddy, and have attributed it to uptake of deep water nitrate brought up due to upwelling combined with a shift in phytoplankton community to large diatoms. Although, in the present study the lowest C:N ratio (Fig.…”

“…Previous studies in the oligotrophic equatorial Indian Ocean have indicated greater contribution of heterotrophic bacterial production to the biological production (Fernandes et al, 2008;Ramaiah et al, 2009). Selective mineralization of POM resulting in preferential removal of nitrogen rich compounds by heterotrophic bacteria is fairly well-known in marine environments (Eadie and Jeffrey, 1973;Harvey et al, 1995;Kolasinski et al, 2012). The greater bacterial productivity in TIO coupled with selective N-removal may be responsible for the higher C:N ratio (> 7) in the equatorial waters.…”

Anti-cyclonic eddy imprint on calcite geochemistry of several planktonic foraminiferal species in the Mozambique Channel

“…In addition to the well-studied eddies within the Gulf Stream and Kuroshio Current (Cronin and Watts, 1996;Mensa et al, 2013), eddies are ubiquitous and found in many regions (e.g. McGillicuddy et al, 1998;Martin and Richards, 2001;Mackas et al, 2005;Kolasinski et al, 2012). Eddies also transport nutrients, salt and other chemicals (Bakun, 2006;Xiu et al, 2011), thereby regulating marine species abundances and community composition (Owen, 1981;Sabarros et al, 2009;Huggett, 2013;Lamont et al, 2013).…”

Water cycle and salinity dynamics in the mangrove forests of Europa and Juan de Nova Islands, southwest Indian Ocean

“…The strong currents from eddy cyclones in the Mozambique Channel and its seasonal variations could explain the variability observed for the seawater isotopic pools between 2011 and 2013.…”