Drivers of euphausiid species abundance and numerical abundance in the Atlantic Ocean

Contributions of phytoplankton and bacteria to the optical backscattering coefficient over the Mid-Atlantic Ridge

“…The MAR at these latitudes is interrupted by the Charlie Gibbs fracture, and the water mass circulation of the area is characterised by intense mesoscale activity (Read et al 2010). This has ecological significance for higher trophic levels (Letessier et al 2009). Some studies on water masses south of the MAR (e.g.…”

Species Richness, Taxonomic Distinctness and Environmental Influences on Euphausiid Zoogeography in the Indian Ocean

“…The size of the sampling cells was a trade-off between a manageable data set and a biological meaningful resolution for euphausiids, and is similar to the cell size used for other studies on euphausiids [11,12]. To populate these cells, presence/absence data for individual euphausiid species throughout the Indian Ocean were initially obtained from the global collation of records, assembled up until the year 2000 [7].…”

“…Euphausiids have been the subject of broad-scale zoogeographical studies as most extant species are expected to have been identified, and their distributions are relatively well known across the world's oceans [6,7]. Euphausiid assemblages have been used to define biogeographical provinces for the South Atlantic [8], Southeast Asia [9], and Pacific Ocean [1], while species richness has been used to identify patterns across ocean basins for the world [10], the Pacific Ocean [11] and the Atlantic Ocean [12].…”

“…Oceanography plays a key role in influencing the distribution of euphausiids [11][12][13][14][15]. Species possess different tolerances to environmental variables such as temperature, salinity and dissolved oxygen, and this can link their distributions with tropical, subtropical or temperate water masses and geographic areas [9,16,17].…”

“…Species possess different tolerances to environmental variables such as temperature, salinity and dissolved oxygen, and this can link their distributions with tropical, subtropical or temperate water masses and geographic areas [9,16,17]. Environmental variables influencing euphausiid species richness have been investigated for the Pacific Ocean [11] and Atlantic Ocean [12]; sea surface temperature and salinity were the main drivers of species richness for the Pacific, and sea surface temperature was the main environmental driver for the Atlantic Ocean. The broad scale global analysis of marine biodiversity in [10] included euphausiids as an example taxon and identified sea surface temperature and primary productivity as important predictors of species richness.…”