@misc{10481/75410,
year = {2022},
month = {3},
url = {http://hdl.handle.net/10481/75410},
abstract = {Trace fossil assemblages are studied at Ocean Discovery Program (ODP) Site 977 to characterize the response of
the macrobenthic trace maker community to deep paleoenvironmental conditions during the Termination V (TV)
and interglacial Marine Isotope Stage (MIS) 11 at the western Mediterranean Alboran Sea. An assemblage
composed of Chondrites, Planolites, Scolicia, Thalassinoides and Zoophycos is identified, showing notable variations
in ichnodiversity, abundance and Bioturbation Index, that were analyzed in detail. The integration of ichnological
information with sediment color and high-resolution coccolithophore records from Site 977, evidenced
that variations in macrobenthic trace maker community are primarily controlled by oxygen availability and
surface organic productivity patterns. During TV, high surface organic productivity by intense Alboran Upwelling
System enhanced the deep organic accumulation that, together with reduced deep-water removal, resulted in a
decrease of bioturbation and the formation of an Organic Rich Layer. Moderate and stable surface production
through MIS 11c reduced deep food availability, resulting in an oligotrophic and stable deep environment. This is
reflected by relatively abundant trace fossils in lighter sediments. Intra-interglacial increase in surface organic
production at ~405 ka is evidenced by increased organic matter preservation. Minor impact of western Mediterranean
circulation on deep-water removal, but a plausible stronger control by Bernoulli aspiration intensities
in the region, is, in overall, observed during these intervals. During the Heinrich-type (Ht) events 3 and 2,
increased trace fossil diversity and ameliorated oxygenation is driven by limited surface organic production, but
intense western Mediterranean deep-water circulation and enhanced regional deep-water removal.},
organization = {Spanish Government	FPU17/03349},
organization = {Juan de la Cierva Program by the Spanish Ministry of Science and Innovation	IJC2019-038866-I},
organization = {Spanish Government	RTI2018-099489-B-100	
CGL2015-66835-P	
PID2019-104625RB-100},
organization = {Andalusian Government	B-RNM-072-UGR18	
P18-RT-4074},
publisher = {Elsevier},
keywords = {Trace fossils},
keywords = {Primary productivity},
keywords = {Deep oxygenation},
keywords = {Nannofossils},
keywords = {Western Mediterranean},
keywords = {Marine Isotope Stage 11},
title = {Trace fossil characterization during Termination V and MIS 11 at the western Mediterranean: Connection between surface conditions and deep environment},
doi = {10.1016/j.margeo.2022.106774},
author = {González Lanchas, Alba and Dorador Rodríguez, Javier and Rodríguez Tovar, Francisco J.},
}