7 results match your criteria: "Alfred Wegener Institute for Polar- and Marine Research Bremerhaven[Affiliation]"
Machine learning techniques to characterize functional traits of plankton from image data.
Limnol Oceanogr
August 2022
Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche Villefranche-sur-Mer France.
Article Synopsis
- Plankton imaging systems with automated classification have enhanced the study of aquatic ecosystems by enabling detailed tracking of plankton populations.
- These systems capture high-resolution imaging data, offering insights not only into species abundance but also into functional traits of individual plankton.
- The text suggests using machine learning and computer vision techniques to analyze this imaging data, proposing that these methods could be applied to other organisms in both aquatic and terrestrial environments.
Article Synopsis
- The early Eocene featured high CO2 levels (1,200-2,500 ppmv) and significantly warmer global temperatures (10°C-16°C above modern), but the impact on Africa's hydrological cycle is not well understood.
- A study using advanced climate models highlights that while model biases exist when comparing pre-industrial simulations to modern data, these biases are reduced in the average of multiple models.
- Results indicate that while precipitation increases in equatorial and West Africa with rising CO2, there is no distinct trend of wetting or drying for the continent as a whole, alongside notable changes in regional wind patterns.
Remote sensing of aerosols in the Arctic for an evaluation of global climate model simulations.
J Geophys Res Atmos
July 2014
NASA Langley Research Center Hampton, Virginia, USA.
Unlabelled: In this study Moderate Resolution Imaging Spectroradiometer (MODIS) Aqua retrievals of aerosol optical thickness (AOT) at 555 nm are compared to Sun photometer measurements from Svalbard for a period of 9 years. For the 642 daily coincident measurements that were obtained, MODIS AOT generally varies within the predicted uncertainty of the retrieval over ocean (ΔAOT = ±0.03 ± 0.
View Article and Find Full Text PDFEvolutionary potential of marine phytoplankton under ocean acidification.
Evol Appl
January 2014
Graduate School of Oceanography, University of Rhode Island Narragansett, RI, USA.
Marine phytoplankton have many obvious characters, such as rapid cell division rates and large population sizes, that give them the capacity to evolve in response to global change on timescales of weeks, months or decades. However, few studies directly investigate if this adaptive potential is likely to be realized. Because of this, evidence of to whether and how marine phytoplankton may evolve in response to global change is sparse.
View Article and Find Full Text PDFEmiliania huxleyi, a key player in the global carbon cycle is one of the best studied coccolithophores with respect to biogeochemical cycles, climatology, and host-virus interactions. Strains of E. huxleyi show phenotypic plasticity regarding growth behaviour, light-response, calcification, acidification, and virus susceptibility.
View Article and Find Full Text PDFMicrobial habitat connectivity across spatial scales and hydrothermal temperature gradients at Guaymas Basin.
Front Microbiol
July 2013
HGF-MPG Joint Research Group on Deep Sea Ecology and Technology, Alfred Wegener Institute for Polar and Marine Research Bremerhaven, Germany ; HGF-MPG Joint Research Group on Deep Sea Ecology and Technology, Max Planck Institute for Marine Microbiology Bremen, Germany.
The Guaymas Basin (Gulf of California) hydrothermal vent area is known as a dynamic and hydrothermally vented sedimentary system, where the advection and production of a variety of different metabolic substrates support a high microbial diversity and activity in the seafloor. The main objective of our study was to explore the role of temperature and other environmental factors on community diversity, such as the presence of microbial mats and seafloor bathymetry within one hydrothermally vented field of 200 × 250 m dimension. In this field, temperature increased strongly with sediment depth reaching the known limit of life within a few decimeters.
View Article and Find Full Text PDFA role for haemolymph oxygen capacity in heat tolerance of eurythermal crabs.
Front Physiol
May 2013
Section of Integrative Ecophysiology, Alfred Wegener Institute for Polar and Marine Research Bremerhaven, Germany.
Heat tolerance in aquatic ectotherms is constrained by a mismatch, occurring at high temperatures, between oxygen delivery and demand which compromises the maintenance of aerobic scope. The present study analyses how the wide thermal tolerance range of an eurythermal model species, the green crab Carcinus maenas is supported and limited by its ability to sustain efficient oxygen transport to tissues. Similar to other eurytherms, C.
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