Monitoring ocean biogeochemistry with autonomous platforms

Nature Reviews Earth & Environment, Journal Year: 2020, Volume and Issue: 1(6), P. 315 - 326

Published: May 21, 2020

Language: Английский

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Climate Change Influences via Species Distribution Shifts and Century‐Scale Warming in an End‐To‐End California Current Ecosystem Model

Global Change Biology, Journal Year: 2025, Volume and Issue: 31(1)

Published: Jan. 1, 2025

ABSTRACT Climate change can impact marine ecosystems through many biological and ecological processes. Ecosystem models are one tool that be used to simulate how the complex impacts of climate may manifest in a warming world. In this study, we an end‐to‐end Atlantis ecosystem model compare contrast effects climate‐driven species redistribution projected temperature from three separate on key commercial importance California Current Ecosystem. Adopting scenario analysis approach, measure differences biomass, abundance, weight at age pelagic demersal among six simulations for years 2013–2100 tracked implications those changes spatially defined fishing fleets. The varied their use forced distribution shifts, time‐varying projections ocean warming, or both. general, abundance biomass coastal like Pacific sardine ( Sardinops sagax ) northern anchovy Engraulis mordax were more sensitive change, while groups Dover sole Microstomus pacificus experienced smaller due counteracting spatial metabolic warming. Climate‐driven shifts resulting food web interactions influential than end‐of‐century patterns. Spatial fisheries catch did not always align with targeted species. This mismatch is likely into out areas emphasizes explicit understanding both dynamics. We illuminate important pathways which acts context end discussion potential management future directions research using models.

Language: Английский

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Climate vulnerability assessment for Pacific salmon and steelhead in the California Current Large Marine Ecosystem

PLoS ONE, Journal Year: 2019, Volume and Issue: 14(7), P. e0217711 - e0217711

Published: July 24, 2019

Major ecological realignments are already occurring in response to climate change. To be successful, conservation strategies now need account for geographical patterns traits sensitive change, as well threats species-level diversity. As part of an effort provide such information, we conducted a vulnerability assessment that included all anadromous Pacific salmon and steelhead (Oncorhynchus spp.) population units listed under the U.S. Endangered Species Act. Using expert-based scoring system, ranked 20 attributes 28 5 additional units. Attributes captured biological sensitivity, or strength linkages between each listing unit present climate; exposure, magnitude projected change local environmental conditions; adaptive capacity, ability modify phenotypes cope with new climatic conditions. Each was then assigned one four categories. Units most vulnerable overall were Chinook (O. tshawytscha) California Central Valley, coho kisutch) southern Oregon, sockeye nerka) Snake River Basin, spring-run interior Columbia Willamette Basins. We identified similar profiles using hierarchical cluster analysis. Life history characteristics, especially freshwater estuary residence times, interplayed gradations exposure from south north coastal regions generate landscape-level within species. Nearly faced high exposures increases stream temperature, sea surface ocean acidification, but other aspects peaked particular regions. Anthropogenic factors, migration barriers, habitat degradation, hatchery influence, have reduced capacity populations. Enhancing is essential mitigate increasing threat Collectively, these results framework support recovery planning considers impacts on majority West Coast salmonids.

Language: Английский

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Observed and predicted impacts of climate change on the estuaries of south-western Australia, a Mediterranean climate region

Regional Environmental Change, Journal Year: 2017, Volume and Issue: 18(5), P. 1357 - 1373

Published: Dec. 12, 2017

Language: Английский

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Causes and consequences of intraspecific variation in animal responses to anthropogenic noise

Behavioral Ecology, Journal Year: 2019, Volume and Issue: 30(6), P. 1501 - 1511

Published: June 16, 2019

Anthropogenic noise is a recognized global pollutant, affecting wide range of nonhuman animals. However, most research considers only whether pollution has an impact, ignoring that individuals within species or population exhibit substantial variation in responses to stress. Here, we first outline how intrinsic characteristics (e.g., body size, condition, sex, and personality) extrinsic factors environmental context, repeated exposure, prior experience, multiple stressors) can affect stressors. We then present the results systematic search anthropogenic-noise literature, identifying articles investigated intraspecific animals noise. This reveals fewer than 10% (51 589) examining impacts test experimentally for responses; those do, more 75% report significant effects. assess these existing studies determine current scope findings to-date, provide suggestions good practice design, implementation, reporting robust experiments this field. close by explaining understanding anthropogenic crucial improving manage captive animals, monitor wild populations, model responses, mitigate effects on wildlife. Our aim stimulate greater knowledge effective management harmful consequences pollutant.

Language: Английский

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Predictability of Species Distributions Deteriorates Under Novel Environmental Conditions in the California Current System

Frontiers in Marine Science, Journal Year: 2020, Volume and Issue: 7

Published: July 29, 2020

Spatial distributions of marine fauna are determined by complex interactions between environmental conditions and animal behaviors. As climate change leads to warmer, more acidic, less oxygenated oceans, species shifting away from their historical distribution ranges, these trends expected continue into the future. Correlative Species Distribution Models (SDMs) can be used project future habitat extent for species, with many different statistical methods available. However, it is vital assess how behave under novel before using models management advice, consider whether projections based on techniques biologically reasonable. In this study, we built SDMs adults larvae two ecologically important pelagic fishes in California Current System: Pacific sardine (Sardinops sagax) northern anchovy (Engraulis mordax). We five SDM methods, ranging simple (thermal niche model) (artificial neural networks). Our results show that some trained data collected 2003 2013 lost substantial predictive skill when applied observations recent years, ocean temperatures associated a heatwave were outside range measurements. This decrease was particularly apparent adult sardine, which showed non-stationary relationships catch locations sea surface temperature through time. While shifted markedly during heatwave, largely maintained spatiotemporal distributions. suggest correlative environment become unreliable anomalous conditions. Understanding underlying physiology therefore essential construction robust rapidly changing environments. Developing offer skillful predictions such as anchovy, migratory include separate sub-stocks, may challenging.

Language: Английский

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Advancing Global Ecological Modeling Capabilities to Simulate Future Trajectories of Change in Marine Ecosystems

Frontiers in Marine Science, Journal Year: 2020, Volume and Issue: 7

Published: Oct. 16, 2020

Considerable effort is being deployed to predict the impacts of climate change and anthropogenic activities on ocean's biophysical environment, biodiversity, natural resources better understand how marine ecosystems provided services humans are likely explore alternative pathways options. We present an updated version EcoOcean (v2), a spatial-temporal ecosystem modelling complex global ocean that spans food-web dynamics from primary producers top predators. Advancements include enhanced ability reproduce by linking species productivity, distributions, trophic interactions worldwide fisheries. The platform used simulate past future scenarios change, where we quantify configurations ecological model, responses climate-change scenarios, additional fishing. Climate-change obtained two Earth-System Models (ESMs, GFDL-ESM2M IPSL-CMA5-LR) contrasting emission (RCPs 2.6 8.5) for historical (1950-2005) (2006-2100) periods. Standardized indicators biomasses selected groups compare simulations. Results show trajectories sensitive EcoOcean, yield moderate differences when looking at larger groups. Ecological also environmental drivers ESM outputs RCPs, spatial variability more severe changes IPSL RCP 8.5 used. Under non-fishing configuration, organisms decreasing trends, while smaller mixed or increasing results. Fishing intensifies negative effects predicted again stronger under 8.5, which results in biomass declines already losing dampened positive those increasing. Several win become losers combined impacts, only few (small benthopelagic fish cephalopods) projected cumulative impacts. v2 can contribute quantification impact assessments multiple stressors plausible ocean-based solutions prevent, mitigate adapt change.

Language: Английский

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Linking climate stressors to ecological processes in ecosystem models, with a case study from the Gulf of Alaska

ICES Journal of Marine Science, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 22, 2024

Abstract As climate stressors are impacting marine ecosystems and fisheries across the world, ecosystem models that incorporate environmental variables increasingly used to inform ecosystem-based management. The assumptions around mechanistic links between biological processes in these important, but implications for model outcomes of which captured how they affect modeled seldom explored. Using a whole-ecosystem (Atlantis) Gulf Alaska, we explore effects capturing physical (increased temperature) biogeochemical (decreased low trophic level productivity) stressors, disentangle each stressor on productivity forage fish, groundfish, fish-eating seabirds. We then test alternative specifications temperature-driven habitat determination bioenergetics. Increased temperature resulted increased weight-at-age higher natural mortality, while decreased mortality. Model specification dependence movement spawning influenced outcomes, decoupling from led overly optimistic biomass predictions. use management becomes more operational, illustrate ecological influence outcomes.

Language: Английский

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Effects of warming rate, acclimation temperature and ontogeny on the critical thermal maximum of temperate marine fish larvae

PLoS ONE, Journal Year: 2017, Volume and Issue: 12(7), P. e0179928 - e0179928

Published: July 27, 2017

Most of the thermal tolerance studies on fish have been performed juveniles and adults, whereas limited information is available for larvae, a stage which may particularly narrow range in tolerable temperatures. Moreover, previous limits marine freshwater larvae (53 reviewed here) applied wide methodologies (e.g. static or dynamic method, different exposure times), making it challenging to compare across taxa. We measured Critical Thermal Maximum (CTmax) Atlantic herring (Clupea harengus) European seabass (Dicentrarchus labrax) using method (ramping assay) assessed effect warming rate (0.5 9°C h-1) acclimation temperature. The had lower CTmax (lowest highest values among 222 individual 13.1-27.0°C) than 90 24.2-34.3°C). At faster rates warming, larval significantly increased herring, no was observed seabass. Higher temperatures led higher (2.7 ± 0.9°C increase) with increases more pronounced at rates. Pre-trials testing effects are recommended. Our results these two temperate fishes suggest 3-6°C h-1: trials relatively short duration, as has suggested larger fish. Additionally, time-dependent where difference up 8°C upper limit between 0.5- 24-h >18°C. present study constitutes first step towards standard protocol measuring

Language: Английский

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Projecting changes in the distribution and productivity of living marine resources: A critical review of the suite of modelling approaches used in the large European project VECTORS

Estuarine Coastal and Shelf Science, Journal Year: 2016, Volume and Issue: 201, P. 40 - 55

Published: May 25, 2016

Language: Английский

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