Evolution of fast-growing piscivorous herring in the young Baltic Sea DOI Creative Commons
Jake Goodall, Mats E. Pettersson, Ulf Bergström

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Dec. 23, 2024

Abstract The circumstances under which species diversify to genetically distinct lineages is a fundamental question in biology. Atlantic herring ( Clupea harengus ) an extremely abundant zooplanktivorous that subdivided into multiple ecotypes differ regarding spawning time and genetic adaption local environmental conditions such as temperature, salinity, light conditions. Here we show using whole genome analysis populations of piscivorous (fish-eating) have evolved sympatrically after the colonization brackish Baltic Sea within last 8000 years postglaciation. ecotype grows faster, much larger less than herring. Lesions gill rakers indicated incomplete adaptation fish diet. This niche expansion young Sea, with its paucity species, suggests empty space more important geographic isolation for evolution biodiversity.

Language: Английский

The effect of Shifts in Fish Community Structure on PCDD/F temporal variability in common guillemot (Baltic Sea) DOI Creative Commons
Yosr Ammar, Jens Olsson, Elena Gorokhova

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2025, Volume and Issue: unknown

Published: April 19, 2025

Abstract Persistent Organic Pollutants, specifically polychlorinated dibenzodioxins (PCDDs) and dibenzofurans (PCDFs) (PCDD/Fs) threaten marine ecosystems through biomagnification bioaccumulation in top predators. Following environmental legislation introduction the 1970s, PCDD/F concentrations declined Baltic Sea biota. However, previous studies signaled that this decline plateaued from 1990s onward common guillemot ( Uria aalge ) eggs. This period coincides with shifts conditions food-web structure, including prey species. Here, we hypothesize temporal variability of PCDD/Fs eggs was driven by changing structure affecting availability. We identified phases dynamic fish community linked them to rate change, potential anthropogenic drivers these phases. Three distinct emerged: cod herring dominance (1976–1986), sprat (1987–2001), stickleback increase (2002–2021). sharply during first phase (-6.4% y 1 ), second (0.27% resumed a third (-3.8% ). The transition sprat-dominated increased guillemots’ dietary exposure PCDD/Fs, contributing plateau. Conversely, rise as key species may have facilitated post-2002 decline. Shifts were changes temperature, salinity, zooplankton size, fishing pressure. conclude both bottom-up (environmental conditions) top-down (fisheries dynamics) effects cascaded ecosystem, reshaping influencing

Language: Английский

Citations

0
Evolution of fast-growing piscivorous herring in the young Baltic Sea DOI Creative Commons
Jake Goodall, Mats E. Pettersson, Ulf Bergström

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Dec. 23, 2024

Abstract The circumstances under which species diversify to genetically distinct lineages is a fundamental question in biology. Atlantic herring ( Clupea harengus ) an extremely abundant zooplanktivorous that subdivided into multiple ecotypes differ regarding spawning time and genetic adaption local environmental conditions such as temperature, salinity, light conditions. Here we show using whole genome analysis populations of piscivorous (fish-eating) have evolved sympatrically after the colonization brackish Baltic Sea within last 8000 years postglaciation. ecotype grows faster, much larger less than herring. Lesions gill rakers indicated incomplete adaptation fish diet. This niche expansion young Sea, with its paucity species, suggests empty space more important geographic isolation for evolution biodiversity.

Language: Английский

Citations

0