11 hasil untuk "Rob Witbaard"
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Artikel Jurnal
Biogeochemical dynamics in a marine storm demonstrates differences between natural and anthropogenic impacts
Abstract This study explores the impact of a wind storm on sediment resuspension and marine biogeochemical dynamics. Additionally, the storm took place during an expedition researching bottom trawling, enabling the direct comparison of certain natural and fisheries-related disturbances. The storm…
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Artikel Jurnal
Using big ‘messy’ data to model species distributions for spatial conservation management
Abstract Spatial conservation management—via Protected Areas and other spatial measures—is key to reversing the rapid global decline in biodiversity. International spatial targets have been agreed to tackle the biodiversity crisis, yet spatial management is not being globally implemented at the…
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Artikel Jurnal Teks lengkap
Temperature-induced microstructural changes in shells of laboratory-grown Arctica islandica (Bivalvia)
Bivalve shells are increasingly used as archives for high-resolution paleoclimate analyses. However, there is still an urgent need for quantitative temperature proxies that work without knowledge of the water chemistry–as is required for δ18O-based paleothermometry–and can better withstand…
Juga tersedia di: DOAJ
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Artikel Jurnal Teks lengkap
Growth, maturity, and diet of the pearl whipray (Fontitrygon margaritella) from the Bijagós Archipelago, Guinea-Bissau
The pearl whipray Fontitrygon margaritella (Compagno & Roberts, 1984) is a common elasmobranch in coastal western African waters. However, knowledge on their life-history and trophic ecology remains limited. Therefore, we aimed to determine the growth, maturity and diet of F. margaritella from the…
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Artikel Jurnal
Sr/Ca in shells of laboratory-grown bivalves (Arctica islandica) serves as a proxy for water temperature – implications for (paleo)environmental research?
Seawater temperature is an essential quantity for paleoclimatological and paleoecological studies. A potential archive that can provide century-long, temporally well-constrained and high-resolution temperature proxy data is available in the form of bivalve shells. However, the number of…
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Artikel Jurnal
Sediments as a Source of Iron, Manganese, Cobalt and Nickel to Continental Shelf Waters (Louisiana, Gulf of Mexico)
Continental shelf sediments are a key source of trace metals to the ocean. In this study, we investigate the impact of sedimentary processes on water column concentrations of iron (Fe), manganese (Mn), cobalt (Co), and nickel (Ni) at five stations on the Louisiana continental shelf and slope, Gulf…
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Artikel Jurnal
Tracing timing of growth in cultured molluscs using strontium spiking
IntroductionGrowth experiments present a powerful tool for determining the effect of environmental parameters on growth and carbonate composition in biogenic calcifiers. For successful proxy calibration and biomineralization studies, it is vital to identify volumes of carbonate precipitated by…
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Artikel Jurnal
Operating Cabled Underwater Observatories in Rough Shelf-Sea Environments: A Technological Challenge
Cabled coastal observatories are often seen as future-oriented marine technology that enables science to conduct observational and experimental studies under water year-round, independent of physical accessibility to the target area. Additionally, the availability of (unrestricted) electricity and…
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Artikel Jurnal
Reconstructing the diet, trophic level and migration pattern of mysticete whales based on baleen isotopic composition
Baleen from mysticete whales is a well-preserved proteinaceous material that can be used to identify migrations and feeding habits for species whose migration pathways are unknown. Analysis of δ13C and δ15N values from bulk baleen have been used to infer migration patterns for individuals. However…