Biogenic carbonate and ice-rafted debris (Heinrich layer) accumulation in deep-sea sediments from a Northeast Atlantic piston core

Kreveld, Shirley A van; Knappertsbusch, Michael; Ottens, Janneke J.; Ganssen, G.M.; Hinte, J.E. van

doi:10.1016/0025-3227(95)00143-3

Cited by 79 publications

(33 citation statements)

References 58 publications

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“…This pattern is consistent with a negative relationship between productivity and diversity, where the very low productivity during ice-rafting events , Thomas et al 1995, van Kreveld et al 1996; but see Sancetta 1992, Hinrichs et al 2001 positively affected species diversity. This increased diversity during Heinrich events might therefore be explained because the low food-supply prevents any one species from becoming dominant.…”

Section: Productivity and Ostracode Diversitysupporting

confidence: 82%

“…In fact, this reversed pattern of low glacial productivity and high interglacial productivity is observed at several highlatitude North Atlantic sites including the Rockall Plateau (Thomas et al 1995, van Kreveld et al 1996, Rasmussen et al 2002. In the next section, we present the hypothesis that ice-rafting during glacial periods explains the reversed trend in high-latitude regions.…”

Section: Productivity and Ostracode Diversitymentioning

confidence: 82%

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Climatic Influences on Deep‐sea Ostracode (Crustacea) Diversity for the Last Three Million Years

Yasuhara¹,

Cronin²

2008

Ecology

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Abstract. Ostracodes are small, bivalved crustaceans with the finest-scale fossil resolution of any metazoan, rivaled only by the fossil record of the protistan Foraminifera. This article presents a synthesis of the patterns and possible causes of alpha species diversity variation in benthic deep-sea ostracodes at drilling sites in the North Atlantic and Arctic Oceans. Taken together, these sites represent a period of great climatic variability covering the past three million years. Sediment cores taken from the Mid-Atlantic Ridge show a positive correlation between warm temperatures and high species diversity. These Mid-Atlantic Ridge cores, at the same latitude as northern Spain, show the same positive correlation during the last two glacial-interglacial cycles (200-0 ka [thousands of years ago]) as they do during the pre-glacial Pliocene 2.85-2.4 Ma (millions of years ago). This positive correlation is also found in Pliocene cores from the Rockall Plateau, at the same latitude as Ireland. During the last 200 thousand years, however, this correlation is reversed in cores taken from both the Rockall and Iceland Plateaus. The discovery of high diversity during colder periods in recent high-latitude Rockall and Iceland cores seems to be explained by spikes in diversity caused by ice-rafting events, which would not affect the lower-latitude Mid-Atlantic Ridge. The Heinrich ice-rafting events reduce North Atlantic surface temperatures and salinity every ;6-12 ka, dramatically decreasing surface productivity. This increase in diversity during Heinrich events may be explained either by a negative correlation between surface productivity and benthic diversity or by increase in diversity caused by moderate disturbance when ice rafted debris fall to the bottom of the ocean.

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Section: Productivity and Ostracode Diversitysupporting

confidence: 82%

Section: Productivity and Ostracode Diversitymentioning

confidence: 82%

Climatic Influences on Deep‐sea Ostracode (Crustacea) Diversity for the Last Three Million Years

Yasuhara¹,

Cronin²

2008

Ecology

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“…This study compares biomarker distributions with more conventional sedimentological climate proxies from a single core, using the same sampling intervals. We chose piston core T88-9P with a 208 ka sediment record, recovered from the midlatitude Northeast Atlantic (48023'32" N, 25005'06" W, 3193 m water depth) (Figure 1) because it has been intensively investigated sedimentologically [van Kreveld et al, 1996; van Kreveld, 1996]. Thus the aim of this work is to intercorrelate specific organic compounds (biomarkers), õ180_ based and microfossil-based proxies for terrigenous input and SST, and to closely examine differences in the paleoclimatic signals recorded by these independent parameters.…”

Section: Introductionmentioning

confidence: 99%

Late Quaternary high‐resolution biomarker and other sedimentary climate proxies in a Northeast Atlantic Core

Madureira¹,

Kreveld²,

Eglinton³

et al. 1997

Paleoceanography

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Abstract. We studied variations in terrigenous input and sea surface temperature over the last 208 ka using a multiproxy approach, involving direct comparison of terrigenous and marine molecular biomarker, foraminiferal abundance, and other sedimentological data for the same horizons in a single northeast Atlantic core (core T88-9P; 48o23 ' N, 25o05 ' W, 3193 m water depth, 790 cm core length) with a well-resolved •5180 stratigraphy. The abundances of three landderived, long-chain compound classes, the n-alkanes (C27, C29, and C 3 l), the n-alkanoic acids (C24, C26, and C28), and the n-alkanols (C24, C26, and C28) show glacial/interglacial related changes in the past 208 ka which generally parallel the weight percent noncarbonate. The abundances of these three compound classes are higher in glacial than in interglacial sediments. Such changes are consistent with the expected higher dust inputs during glaciations as well as enhanced advection of particulate matter in current systems. Ice-rafted debris (Heinrich events) may also contribute to the terrigenous biomarker record. The sea surface temperature (SST) signals derived from the alkenone unsaturation index (uK'37) give an average SST during interglacial periods of 13øC, which is about 3-4øC higher than the average glacial SST estimate. The uK'37 -derived SST values dropped markedly in some Heinrich layers, while sometimes leading the onset of the layer; the percent Neogloboquadrina pachyderma(s), which is another frequently used qualitative temperature proxy, generally shows maxima coinciding with the layers. Our results show that most Heinrich layers were produced during times of intensely cold waters in the eastern North Atlantic. They demonstrate that sufficient alkenones are present in the sediments for alkenone stratigraphy to be used as a tool for the assessment of short-term variations in sea surface temperatures even in these oligotrophic North Atlantic waters.

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“…L'importance de la contribution arctique se traduit (Fig. 41b) Baumann et al, 1993;Van Kreveld et al, 1996;Madureira et al, 1997). Laurentide Ice Sheet (Bond et al, 1992 (Grousset et al, 1982).…”

unclassified

Géochimie isotopique Sr-Nd-Pb des sédiments accumulés depuis 700 000 ans le long de la dorsale de Reykjanes (58-60ʻ Nord) /

Hantchi¹

2000

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Biogenic carbonate and ice-rafted debris (Heinrich layer) accumulation in deep-sea sediments from a Northeast Atlantic piston core

Cited by 79 publications

References 58 publications

Climatic Influences on Deep‐sea Ostracode (Crustacea) Diversity for the Last Three Million Years

Climatic Influences on Deep‐sea Ostracode (Crustacea) Diversity for the Last Three Million Years

Late Quaternary high‐resolution biomarker and other sedimentary climate proxies in a Northeast Atlantic Core

Géochimie isotopique Sr-Nd-Pb des sédiments accumulés depuis 700 000 ans le long de la dorsale de Reykjanes (58-60ʻ Nord) /

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