Does micro-sized pyrogenic carbon made in lab affect earthworm mortality in restrained water content?

0559094 - BC 2023 RIV NL eng J - Článek v odborném periodiku
Sun, Daquan - Ardestani, Masoud Mortazavi - Pohořelý, Michael - Moško, Jaroslav - Winding, A. - Bonkowski, M. - Zhao, Y. - Frouz, Jan
Does micro-sized pyrogenic carbon made in lab affect earthworm mortality in restrained water content?
Applied Soil Ecology. Roč. 177, September (2022), č. článku 104540. ISSN 0929-1393. E-ISSN 1873-0272
GRANT EU: European Commission(XE) 101003391 - FIREMAN
Institucionální podpora: RVO:60077344 ; RVO:67985858
Klíčová slova: dissolved oxygen * earthworm mucus * hydrophobicity * micro-sized char * rhamnolipids * survival of earthworms
Obor OECD: Soil science; Energy and fuels (UCHP-M)
Impakt faktor: 4.8, rok: 2022
Způsob publikování: Omezený přístup
https://www.sciencedirect.com/science/article/pii/S0929139322001561?via%3Dihub

Micro-sized pyrogenic carbon (PyC) is expected to interact more efficiently with soil biota such as earthworms than coarse pyrogenic carbon. Little is known about whether the micro-sized PyC poses a threat to earthworms. We investigated the effects of hydrophilic micro-sized PyC on earthworm mortality in two contrasting soil substrates from young and old reclaimed soils of a successional chronosequence. These two soil substrates had different hydraulic properties, total organic carbon, pH, and nutrient status. Lower earthworm survival rates were observed in both soil substrates receiving dry micro-sized soil particles and the micro-sized PyC. Specifically, the addition of micro-sized PyC resulted in the lowest survival rate compared to the addition of micro-sized soil particles and the control from day 8 to 11. The decreased earthworm survival rate due to micro-sized PyC was more pronounced in the old soil substrate than in the young substrate. Fully moistened soil substrates containing micro-sized PyC or dry micro-sized soil substrate particles did not result in decreased earthworm survival. Micro-sized PyC turned from hydrophilic to hydrophobic when mixed with rhamnolipids, possibly hindering the uptake of dissolved oxygen by earthworm skins. Our results thus provide a new explanation for the negative effects of micro-sized PyC on earthworms and demonstrate the importance of assessing the hydraulic properties of both the micro-sized PyC and soil prior to PyC's application to soils.
Trvalý link: https://hdl.handle.net/11104/0333155