Climate-induced habitat suitability modelling for pelagic fish in European seas

Frontiers in Marine Science, Journal Year: 2025, Volume and Issue: 12

Published: Feb. 27, 2025

Pelagic fish species, including Clupea harengus (Atlantic herring), Scomber scombrus mackerel) and Dicentrarchus labrax (European seabass), are integral to the ecological stability of European marine ecosystems. This study employs a mechanistic niche modelling approach predict distribution these key pelagic species in seas assess impact predicted changes climate conditions on their suitable habitat range. By using fuzzy logic principles mathematical descriptions species’ niches, we analysed responses changing temperature salinity prediction data from six Shared Socioeconomic Pathways (SSP) scenarios, predicting suitability present (2010-2019) until 2100. Under worst-case scenario, all three exhibited consistent northward shift habitats by Specifically, for C. harengus, S. D. is projected approximately 638 km, 799 km 13 north, respectively. The independent contributions indicate distinction between northern waters Mediterranean Sea, with higher scores north. For example, 2100, index non-spawning Atlantic herring North Ocean be 0.63 ± 0.3 under SSP5-8.5 compared current 0.49 0.36, while 0.02 0.003 Sea-Western Basin at 0.01 0.03. These findings suggest that latitudes, encompassing regions such as Sea Baltic currently offer more favorable lower latitudes region. study’s should guide policy decisions environmental resource management, ensuring interventions based up-to-date information account anticipated change impacts.

Language: Английский

Effects of elevated pCO2 on bioenergetics and disease susceptibility in Pacific herring Clupea pallasii

Marine Ecology Progress Series, Journal Year: 2024, Volume and Issue: 738, P. 225 - 242

Published: May 2, 2024

Ocean acidification can affect the immune responses of fish, but effects on pathogen susceptibility remain uncertain. Pacific herring Clupea pallasii were reared from hatch under 3 CO 2 partial pressure ( p ) treatments (ambient, ∼650 µatm; intermediate, ∼1500 high, ∼3000 µatm) through metamorphosis (98 d) to evaluate ocean bioenergetics and an endemic viral disease. Mortality hemorrhagic septicemia (VHS) was comparable between ambient intermediate (all vulnerability testing at ). By contrast, fish high experienced significantly higher rates VHS mortality, condition factor survivors lower than in other treatments. However, prevalence infection among not influenced by treatment. Pre-flexion larval development affected elevated , as growth rate, energy use, feeding activity across Similarly, long-term (14 wk) chronic exposure . Herring both showed average reduction swimming speed; however, wide intra-treatment variability rendered effect nonsignificant. This study demonstrates that post-metamorphic are near-future predicted for coastal systems North Pacific. increased 3000 µatm indicates potential health fitness consequences extreme acidification.

Language: Английский

Respiratory acidosis and O2 supply capacity do not affect the acute temperature tolerance of rainbow trout (Oncorhynchus mykiss)

Conservation Physiology, Journal Year: 2024, Volume and Issue: 12(1)

Published: Jan. 1, 2024

The mechanisms that determine the temperature tolerances of fish are poorly understood, creating barriers to disentangle how additional environmental challenges-such as CO2-induced aquatic acidification and fluctuating oxygen availability-may exacerbate vulnerability a warming climate extreme heat events. Here, we explored whether two acute exposures (~0.5 hours or ~72 hours) increased CO2 impact tolerance limits in freshwater fish, rainbow trout (Oncorhynchus mykiss). We separated potential effects high exposure on critical thermal maximum (CTmax), caused via either respiratory acidosis (reduced internal pH) O2 supply capacity (aerobic scope), by exposing ~1 kPa (~1% 10 000 μatm) combination with normoxia hyperoxia (~21 42 O2, respectively). In normoxia, large (blood pH decreased 0.43 units), while aerobic scope 28%. Despite changes blood between treatments, observed no impacts CTmax trout. Our results suggest independent acid-base balance deliver tissues.

Language: Английский