Large-scale nutrient fertilisation by coastal upwelling promotes benthic productivity through energy subsidies from enhanced phytoplankton production, and predictions of alterations to upwelling under climate change have implications for benthic ecosystem functioning. We investigated the stable isotope compositions of two bioengineers of global significance, the mussels Perna perna and Mytilus galloprovincialis, from upwelling and non-upwelling sites in five upwelling systems. Samples from Brazil, South Africa and Oman exhibited lower δC values at upwelling sites than at non-upwelling sites, with clearer effects where upwelling is more intense and frequent. North West Africa showed variability, probably linked to Saharan dust input. We highlight the importance of upwelling to sustaining benthic primary consumers and the sensitivity of consumer diet to the intensity and frequency of upwelling within each region. These results have implications in relation to climate change scenario effects on upwelling events, with potential cascading effects on higher trophic levels and ecosystem functioning.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.marenvres.2019.03.015 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Distribution of organic matter and diatom frustules (diversity, flux) along the western Indian continental shelf related to contrasting physicochemical settings.
Mar Environ Res
January 2025
Université de Bordeaux, CNRS Bordeaux INP, EPOC, UMR 5805, F-33600, Pessac, France.
The western Indian continental shelf (eastern Arabian Sea) exhibits contrasting biogeochemical features. This area becomes highly productive due to summer monsoon-driven coastal upwelling in the south and winter monsoon-induced convective mixing in the north. Additionally, in the northern self, the eastern boundary of the Oxygen Minimum Zone (OMZ) persists but is absent in the south.
View Article and Find Full Text PDFAsynchronous effects of heat stress on growth rates of massive corals and damselfish in the Red Sea.
PLoS One
January 2025
College of Natural and Computational Sciences, Hawai'i Pacific University, Honolulu, HI, United States of America.
Climate change is imposing multiple stressors on marine life, leading to a restructuring of ecological communities as species exhibit differential sensitivities to these stressors. With the ocean warming and wind patterns shifting, processes that drive thermal variations in coastal regions, such as marine heatwaves and upwelling events, can change in frequency, timing, duration, and severity. These changes in environmental parameters can physiologically impact organisms residing in these habitats.
View Article and Find Full Text PDFExploring the relationship between upwelling intensity and socio-ecological attributes of marine exploitation areas for benthic resources (MEABRs), along the southern Humboldt Current system.
J Environ Manage
January 2025
Departamento de Ecología y Biodiversidad, Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile; Centro de Investigaciones Marinas de Quintay, Universidad Andres Bello, Chile. Electronic address:
The Eastern Boundary Upwelling Systems (EBUS) sustains some of the most productive marine systems on Earth. Within each of these systems, the upwelling process exhibits spatial and temporal variation resulting in marked differences in upwelling intensity and seasonality along extensive coastlines. The study of this variation is well needed, given the magnitude of the services provided by upwelling, and the impending impacts of global warming on EBUS.
View Article and Find Full Text PDFSpatiotemporal variability of air-sea CO fluxes in response to El Niño-related marine heatwaves in the tropical Pacific Ocean.
Mar Environ Res
January 2025
First Institute of Oceanography and Key Laboratory of Marine Sciences and Numerical Modelling, Ministry of Natural Resources, Qingdao, 266061, China; Laboratory for Regional Oceanography and Numerical Modelling, Qingdao Marine Science and Technology Center, Qingdao, 266237, China; Shandong Key Laboratory of Marine Sciences and Numerical Modeling, Qingdao, 266061, China. Electronic address:
The tropical Pacific is the largest oceanic source of carbon dioxide (CO) emissions, where persistent marine heatwaves (MHWs) frequently occur. During persistent MHW events which are associated with strong El Niño events, CO outgassing is notably reduced, however, its detailed spatiotemporal response to MHWs has not been fully characterized. In this study, we showed a high degree of consistency between CO source regions in the central and eastern tropical Pacific Ocean and the occurrence regions with average annual MHW days exceeding 45 days (co-occurring area covers 80% of the area where MHWs occur).
View Article and Find Full Text PDFDetermining chlorophyll-a thresholds for characterizing algal bloom conditions: An ocean colour remote sensing approach.
Sci Total Environ
January 2025
Department of Marine Sciences, Berhampur University, Bhanja Bihar 760007, India.
The Indian coast has been experiencing an increase in algal bloom events over the decades. Owing to the regional and seasonal dynamics of algal biomass (proxy: chlorophyll-a, hereafter chl-a), a multitude of thresholds of chl-a has been defined for different parts of the global seas to determine algal bloom conditions. However, no such clear definition is given for the Indian coastal waters.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!