Results 71 to 80 of about 8,590 (192)

Bioturbation by stingrays at Ningaloo Reef, Western Australia [PDF]

open access: yes, 2012
Stingrays are an important part of the biomass of the fishes in shallow coastal ecosystems, particularly in inter-reefal areas. In these habitats, they are considered keystone species -modifying physical and biological habitats through their foraging and
Meekan, M.   +3 more
core  

Spatial mode estimation for functional random fields with application to bioturbation problem [PDF]

open access: yes, 2009
This work provides a useful tool to study the effects of bioturbation on the distribution of oxygen within sediments. We propose here heterogeneity measurements based on functional spatial mode.
Cuny, Philippe   +4 more
core   +1 more source

Deep Learning Applications in Geosciences: Insights into Ichnological Analysis

open access: yesApplied Sciences, 2021
Ichnological analysis, particularly assessing bioturbation index, provides critical parameters for characterizing many oil and gas reservoirs. It provides information on reservoir quality, paleodepositional conditions, redox conditions, and more. However,
Korhan Ayranci   +3 more
doaj   +1 more source

The German Soil Systematics and the Rationale Behind Its Revision

open access: yesJournal of Plant Nutrition and Soil Science, EarlyView.
ABSTRACT Background The German Soil Systematics is a pedogenetic classification based on the morphological expressions of pedogenic processes and has been developed over several stages since 1952. The system has successfully been in use for soil classification and soil survey for almost 70 years.
Einar Eberhardt   +3 more
wiley   +1 more source

Sediment geochemistry and accumulation rates on the northeastern shelf of the Gulf of Cádiz (SW Iberian Peninsula)

open access: yesScientia Marina, 2010
Geochemistry, total organic carbon and total nitrogen of three sediment cores collected in the Gulf of Cádiz and the Guadalquivir prodelta areas in Spain were investigated.
Roberta Guerra   +4 more
doaj   +1 more source

MERCURY INTRUSION POROSIMETRY TO EVALUATE THE INCIDENCE OF BIOTURBATION ON POROSITY OF CONTOURITES

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2021
The effect of bioturbation on rocks’ flow-media properties (e.g., porosity and permeability) and its impact on reservoir quality has been previously documented.
FRANCISCO J. RODRÍGUEZ-TOVAR   +2 more
doaj   +1 more source

‘The most advanced outpost of cultivation’: palynological evidence for cereal agriculture and population resilience in a marginal upland environment

open access: yesJournal of Quaternary Science, EarlyView.
ABSTRACT Upland farming in Europe is frequently assumed to have been limited and precarious, despite relict spade‐dug ridges providing firm evidence of past crop growing. Direct evidence for crop types in post‑Medieval to Modern (~since 1500 CE) uplands is rare; yet, in Ireland, relict spade‐dug ridges that date to this period are commonly interpreted ...
Helen Essell, Gill Plunkett
wiley   +1 more source

Bioturbation feedbacks on the phosphorus cycle

open access: yes, 2021
Bioturbation—sediment mixing and ventilation by burrowing animals—provides one of the most prominent examples of how animals shape their surroundings. A critical but longstanding question is when and how in Earth's history bioturbators began to similarly
Planavsky, NJ, Tarhan, LG, Zhao, M
core   +1 more source

Ngarrawa (mound spring) sediments as archives of Holocene environmental change in arid central Australia: Insights from Itrax XRF scanning

open access: yesJournal of Quaternary Science, EarlyView.
ABSTRACT Central Australia's ngarrawa, or ‘mound springs’, are unique hydrological systems that serve as some of the only near‐permanent sources of water and continuous sediment deposition in Australia's arid interior. As such, they hold significant potential as palaeo‐climate and ‐environmental archives in a region where many aspects of past climate ...
Fletcher C. Nixon   +3 more
wiley   +1 more source

Global patterns of bioturbation intensity and mixed depth of marine soft sediments [PDF]

open access: yes, 2013
: The importance of bioturbation in mediating biogeochemical processes in the upper\ud centimetres of oceanic sediments provides a compelling reason for wanting to quantify in situ rates of\ud bioturbation.
Bulling, Mark T.   +3 more
core   +1 more source

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