Marine heatwaves and decreased light availability interact to erode the ecophysiological performance of habitat‐forming kelp species

Journal of Phycology, Journal Year: 2023, Volume and Issue: 59(3), P. 481 - 495

Published: March 25, 2023

Coastal marine ecosystems are threatened by a range of anthropogenic stressors, operating at global, local, and temporal scales. We investigated the impact heatwaves (MHWs) combined with decreased light availability over two seasons on ecophysiological responses three kelp species (Laminaria digitata, L. hyperborea, ochroleuca). These function as important habitat-forming foundation organisms in northeast Atlantic have distinct but overlapping latitudinal distributions thermal niches. Under low-light conditions, summertime MHWs induced significant declines biomass, blade surface area, Fv/Fm values (a measure photosynthetic efficiency) cool-water kelps digitata albeit to varying degrees. high-light all were largely resistant simulated MHW activity. In springtime, had minimal impacts some cases promoted performance, while reduced resulted lower growth rates. While negatively affected summer under conditions (particularly digitata), they generally resilient conditions. As such, maintaining good environmental quality water clarity may increase resilience populations MHWs. Our study informs predictions how will be interacting, concurrent typical compound events that intensifying climate change.

Language: Английский

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The many pathways of climate change affecting coastal ecosystems: a case study of western Vancouver Island, Canada

FACETS, Journal Year: 2025, Volume and Issue: 10, P. 1 - 18

Published: Jan. 1, 2025

Climate change threatens marine ecosystems with known effects on life, including changes in metabolic rates, survival, and community structure. Based a structured literature review, we developed conceptual “pathways of effects” model that summarizes how three stressors associated climate (warming, acidification, storms) affect functional species groups the West Coast Vancouver Island, Canada. We identified 155 distinct pathways from through 12 categories biological ranging biochemistry individual organisms to composition. Most were affected by several via many pathways, although studies generally considered only small fraction relevant pathways. These depended interest geographical location, highlighting importance local research. exert complex, sometimes contradictory vary across ecological scales. For example, some adversely laboratory appeared beneficial community-scale field studies. Pathways models are helpful tools summarize scientific Compiling them standardized databases would allow researchers practitioners search regions better support ecosystem-based management environmental impact assessment.

Language: Английский

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An aquaria set‐up for long‐term, multiple‐stressor research in marine organisms

Methods in Ecology and Evolution, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 7, 2025

Abstract Multiple stressor research in aquaria is a useful approach to better understand the ecophysiology of marine species under different environmental conditions, including global change scenarios. Long‐term experiments are helpful detect response sustained exposure selected conditions. Here, we present an experimental set‐up suitable run long‐term experiments, composed life support system, cost‐effective and open‐source controller based on use Raspberry Pi. In this set‐up, temperature, pH dissolved oxygen (DO) individually manipulated simultaneously controlled eight treatments. To prove efficacy provide assessment over nine‐month experiment deep‐sea coral species, combining values from current situ IPCC AR5 RCP 8.5 scenarios for aforementioned parameters. Recorded data controllers independent measurements (e.g. cross‐checking with portable multiparameter devices laboratory analyses) throughout time have been analysed results discussed. Overall, performed well, proving stability parameters time, both combination. On average, low high‐temperature treatments varied ~0.4 0.3°C, respectively. Low were maintained within 0.05 units, whereas ambient ~0.04 units. DO had variation ~0.3 mg L −1 , ~0.2 . No significant differences between any parameter detected ( p < 0.05). The resulting programming code read, control register these provided contribute its replicability across institutions. well extensive periods while providing customisable as alternative. versatility allowing work environments makes it valuable where interactions multiple factors need be tested.

Language: Английский

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Contrasting environmental and demographic influences on growth variability in two tropical snappers spanning the equator in the Indo-West Pacific

Reviews in Fish Biology and Fisheries, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 1, 2025

Language: Английский

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Variable photosystem II thermal stress responses of reef-building corals Pocillopora indiania and Heliopora coerulea across latitudes from the Mascarene Plateau, Indian Ocean

Deep Sea Research Part II Topical Studies in Oceanography, Journal Year: 2025, Volume and Issue: unknown, P. 105467 - 105467

Published: Feb. 1, 2025

Language: Английский

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A Regional View of the Response to Climate Change: A Meta-Analysis of European Benthic Organisms’ Responses

Frontiers in Marine Science, Journal Year: 2022, Volume and Issue: 9

Published: June 27, 2022

Climate change is impacting organisms in every region of the world ocean by acting though on individuals response to their local environments. Given projected future risks derived from these changes, it becoming increasingly important understand regional signals how respond facilitate governance and protection. Benthic structure ecological compositions ecosystem dynamics, therefore not only providing insights into own climate but also ecosystems might conditions. European seas are transitional areas including boreal, warm-temperate, subarctic waters with frequently at limits distributions. Here, we use a meta-analytical approach assess calcification, growth, metabolism, photosynthesis, reproduction, survival benthic acidification warming. Using meta-regression, examine study design factors influence effect-size outcomes. Longer experimental periods generally amplified effects taxonomic groupings related physiological traits against expectation do result acclimation. In agreement global studies, find that impacts vary considerably different traits. We found calcifying an at-risk taxon waters, stressors decreasing growth rates, rates. Fleshy algal species demonstrate resilience stressors, suggesting will undergo restructuring based current emission pathways.

Language: Английский

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Technical note: An autonomous flow-through salinity and temperature perturbation mesocosm system for multi-stressor experiments

Biogeosciences, Journal Year: 2024, Volume and Issue: 21(1), P. 315 - 333

Published: Jan. 17, 2024

Abstract. The rapid environmental changes in aquatic systems as a result of anthropogenic forcings are creating multitude challenging conditions for organisms and communities. need to better understand the interaction stressors now, future, is fundamental determining response ecosystems these perturbations. This work describes an automated ex situ mesocosm perturbation system that can manipulate several variables media controlled setting. was deployed Kongsfjorden (Svalbard); within this system, ambient water from fjord heated mixed with freshwater multifactorial design investigate mixed-kelp communities mesocosms projected future Arctic conditions. employed dynamic offset scenario which nominal temperature increase programmed set value above real-time order simulate warming. A freshening component applied similar manner: decrease salinity coupled track based on temperature–salinity relationship fjord. functioned mixing manifold adjusted flow rates warmed chilled seawater, unmanipulated seawater delivered single source individual mesocosms. These were maintained via continuously measured 12 (1 control 3 treatments, all triplicate) 54 d. System regulation robust, median deviations < 0.15 both (∘C) across three replicates per treatment. Regulation further improved during second deployment mimicked marine heat wave scenarios held 0.036 ∘C treatment replicates. has potential be implemented wide range test or multi-stressor drivers (e.g., increased temperature, freshening, high CO2) while maintaining natural variability. independent each experimental unit (if desired) provides large breadth versatility respect design.

Language: Английский

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Developmental and biochemical markers of the impact of pollutant mixtures under the effect of Global Climate Change

Chemosphere, Journal Year: 2024, Volume and Issue: 358, P. 142162 - 142162

Published: April 30, 2024

This study investigates the combined impact of microplastics (MP) and Chlorpyriphos (CPF) on sea urchin larvae (Paracentrotus lividus) under backdrop ocean warming acidification. While individual toxic effects these pollutants have been previously reported, their remain poorly understood. Two experiments were conducted using different concentrations CPF (EC10 EC50) based previous studies from our group. MP adsorbed in to simulate realistic environmental conditions. Additionally, water acidification protocols implemented mimic future Sea embryo toxicity tests assess larval development various treatment combinations CPF, MP, (OA), temperature (OW). Morphometric measurements biochemical analyses performed evaluate comprehensively. Results indicate that stressors lead significant morphological alterations, such as increased width reduced stomach volume. Furthermore, biomarkers like acetylcholinesterase (AChE), glutathione S-transferase (GST), reductase (GRx) activities affected, indicating oxidative stress impaired detoxification capacity. Interestingly, while increase was expected enhance growth, it instead induced thermal stress, resulting lower growth rates. underscores importance considering multiple ecological assessments. Biochemical provided early indications responses, complementing traditional measurements. The highlights necessity holistic approaches when assessing impacts marine ecosystems. Understanding interactions between is crucial for effective conservation strategies. Future research should delve deeper into at biological levels explore adaptive mechanisms organisms facing stressors. By doing so, we can better anticipate mitigate adverse anthropogenic biodiversity ecosystem health.

Language: Английский

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Understanding Dynamic Molecular Responses Is Key to Designing Environmental Stress Experiments: A Review of Gene and Protein Expression in Cnidaria Under Stress

Molecular Ecology, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Gene and protein expression analyses are powerful tools to investigate the responses of cnidarians stress, providing information on both genetic functional variation capturing dynamic shifts in organismal physiology. As use high throughput sequencing understand stressors is still relatively new, standard experimental protocols have not yet been established, which limits ability compare studies. We (1) systematically reviewed literature cnidarian gene studies related environmental determine how laboratory experiments were designed (2) investigated consistency genes commonly used as biomarkers within stress conducted five most-studied genera. Duration exposure stressor, acclimation period intensity varied greatly among experiments, most did sample during recovery. Before designing that aim characterise molecular a specific research efforts need focus understanding plasticity whole transcriptome responses, can vary under different intensities durations exposure. Additionally, only seven tested at least two genera showed consistent response heat (CuZn-SOD, c-type lectin, FGFR1, MMP, Zn-MP, NF-κB SLC26). These potential standardise evaluations temperature across cnidarians, we suggest exploring their general (cBATS).

Language: Английский

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Benthic ecosystem determines jellyfish blooms by controlling the polyp colony development

Marine Pollution Bulletin, Journal Year: 2023, Volume and Issue: 193, P. 115232 - 115232

Published: July 3, 2023

Language: Английский

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