Occurrence of Ulva lactuca L. 1753 (Ulvaceae, Chlorophyta) at the Murman Сoast of the Barents Sea

Abstract

Findings of Ulva lactuca L. on the Murman Сoast of the Barents Sea are described for the period 2009-2017. This species has not been found in this area for more than 50 years. The occurrence of U. lactuca on the Murman Coast appears to be related to the recent warming of waters in the region.

Imprint of Climate Change on Pan-Arctic Marine Vegetation

“…The first species, which was not recorded at the Kola Peninsula coast to the east of Varanger-fjord in the 1960s, became a common and association-forming species on the Kola coast in the 1990-2010s (Schoschina, 1997;Mikhaylova, 2010Mikhaylova, , 2012. The second species, common in Norway, sporadically occurred on the Kola Peninsula coast during the warm period in the 1930s, was not recorded in 1985 -early 1990s, but regularly observed between 2009 and 2017 (Malavenda et al, 2018; Table 1 and Figure 1, Site 31). However, the impact of climatic change on macroalgal communities is difficult to reveal due to limited longterm observations and several other important factors that can overshadow this influence, including anthropogenic changes in the harbor areas and the impact of sea urchins and their predators (such as the red king crab).…”

Optimizing marine macrophyte capacity to locally ameliorate ocean acidification under variable light and flow regimes: Insights from an experimental approach

“…Fucus vesiculosus is a conspicuous intertidal canopy-forming brown macroalga in the North Atlantic [ 38 ], distributed on exposed and protected rocky shores [ 39 ], and it is subjected to small-scale wild harvesting in some areas [ 40 ]. Ulva lactuca , an intertidal green macroalga commonly known as sea lettuce, has a worldwide distribution [ 41 ], and is wild harvested or farmed in tank cultures [ 42 , 43 ]. Each species vary in timing of peak productivity and relative growth rates.…”

Species diversity of macroalgae in Grønfjorden, Spitsbergen, Svalbard

“…The water temperature was observed to increase from Hornsund to Isfjorden and Grønfjorden, and more Atlantic Water was found to be flowing into Isfjorden, where a significant variability in water temperature and salinity was recorded (Moiseev & Gromov 2009). The state of Grønfjorden's MPB has been described by several researchers (Ryžik & Voskobojnikov 2003;Matišov et al 2004;Malavenda et al 2017;Malavenda et al 2018), who reported that a pronounced cover of bottom vegetation was characteristic of only the upper sublittoral zone at depths of 1-23 m. The average length and weight of thalli of Laminaria and Saccharina algae in Grønfjorden were similar to those observed at the Murman coast, whereas the maximal age of the thalli along the Murman coast was four years, compared with three years in Grønfjorden (Vozžinskaja et al 1992;Matišov et al 2004). At the mouth part of Grønfjorden, the biomass (wet weight) of Laminaria or Saccharina algae may reach 60 kg m -² and in the middle part of the fjord, near the Barentsburg harbour, it is 15 kg m -² (Ryžik & Voskobojnikov 2005).…”