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@heiseonline@social.heise.de
2025-10-07 15:45:11

Zum Abend noch einige der heute besonders häufig geteilten #News:
Starlink: Schon ein bis zwei Satellitenabstürze pro Tag – bald sind es fünf

Starlink: Schon ein bis zwei Satellitenabstürze pro Tag – bald sind es fünf
Fast 10.000 Starlink-Satelliten sind im Erdorbit, täglich stürzen ein bis zwei davon ab und mehr wird erwartet. Das könnte etwa die Ozonschicht beeinflussen.

@DrPlanktonguy@ecoevo.social
2025-11-29 14:30:16

Weekend #Plankton Factoid 🦠🦐
Many aquatic animals are described as "filter feeders" but this is not functionally correct since it would require water forced through a mesh. Instead, most zooplankton, including copepods, are suspension feeders. They create feeding current gyres using appendages, and use spiny modified ones (maxillae) to intercept individual algal particles and move …

image/jpeg the feeding current of a copepod zooplankton is shown by lines of the path of water. Two circular gyres are formed at the ends of the antennae beside the head which focuses water current into the head of the copepod, highlighted in red. A scale bar indicates the animal is about 1 mm long. https://www.oceanlifecentre.dk/news/nyhed?id=ebaa37ec-c19f-482a-a7ea-b02e7553588d
image/jpeg a diagram of a mouthpart (maxillae M2) is shown with long spines on the top and shorter ones on the bottom of one side which have protruding hairs to form a basket-like structure. Caption says Centropages velificatus and the scale bar suggests the entire structure is about 0.4 mm long. Taken from Mimi Koehl. 1998. 11(1), Oceanography. https://tos.org/oceanography/assets/docs/11-2_koehl.pdf
@arXiv_statME_bot@mastoxiv.page
2025-10-08 09:51:59

Automated Gating for Flow Cytometry Data Using a Kernel-Smoothed EM Algorithm
Farhad de Sousa, Fran\c{c}ois Ribalet, Jacob Bien
arxiv.org/abs/2510.06051

Automated Gating for Flow Cytometry Data Using a Kernel-Smoothed EM Algorithm
Phytoplankton are microscopic algae responsible for roughly half of the world's photosynthesis that play a critical role in global carbon cycles and oxygen production, and measuring the abundance of their subtypes across a wide range of spatiotemporal scales is of great relevance to oceanography. High-frequency flow cytometry is a powerful technique in which oceanographers at sea can rapidly record the optical properties of tens of thousands of individual phytoplankton cells every few minutes. …

@arXiv_astrophEP_bot@mastoxiv.page
2025-10-10 08:27:19

Magma ocean interactions can explain JWST observations of the sub-Neptune TOI-270 d
Matthew C. Nixon, R. Sander Somers, Arjun B. Savel, Jegug Ih, Eliza M. -R. Kempton, Edward D. Young, Hilke E. Schlichting, Tim Lichtenberg, Luis Welbanks, William Misener, Anjali A. A. Piette, Nicholas F. Wogan
arxiv.org/abs/2510.07367

Magma ocean interactions can explain JWST observations of the sub-Neptune TOI-270 d
Sub-Neptunes with substantial atmospheres may possess magma oceans in contact with the overlying gas, with chemical interactions between the atmosphere and magma playing an important role in shaping atmospheric composition. Early JWST observations have found high abundances of carbon- and oxygen-bearing molecules in a number of sub-Neptune atmospheres, which may result from processes including accretion of icy material at formation or magma-atmosphere interactions. Previous work examining the e…