Shell malformation in stressed Amphistegina populations: relation to biomineralization and paleoenvironmental potential

Toler, Strawn K.; Hallock, Pamela

doi:10.1016/s0377-8398(97)00043-1

Cited by 37 publications

(20 citation statements)

References 22 publications

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“…The thick-walled test allows this species to live in the highest light-energy levels (HALLOCK, 1981). Several studies (HUGHES, 1977;MURRAY, 1991;HALLOCK, 1996HALLOCK, , 1998HALLOCK, , 2000 proposed this species as indicator for coral reef water quality without fluctuations of salinity and oxygen and TRIANTAPHYLLOU et al (2005) considered it as a bioindicator of coastal health in the Aegean Sea.…”

Section: Discussionmentioning

confidence: 99%

“…The host-symbiont system plays an important role in supplying carbon for photosynthesis by the algal symbionts (TER KUILE et al, 1987) and enhancement of foraminiferal calcification (DUGUAY, 1983;TER KUILE, 1991;TOLER & HALLOCK, 1998;EREZ, 2003). HALLOCK (1981), VÉNEC-PEYRÉ (1991) and HALLOCK et al (2003) suggest probable advantages of large foraminiferal feeding from photosynthetic symbionts when dissolved inorganic nutrients and particulate food sources are scarce.…”

Section: Discussionmentioning

confidence: 99%

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The presence of the Indo-Pacific symbiont-bearing foraminifer Amphistegina lobifera in Greek coastal ecosystems (Aegean Sea, Eastern Mediterranean)

2009

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During the last decades, hundreds of species of Indo-Pacific origin from the Red Sea have traversed the Suez Canal and settled in the Eastern Mediterranean. Nowadays, Amphistegina lobifera Larsen, is known to be a successful immigrant that is widely distributed in the coastal ecosystems of the Eastern Mediterranean Sea. Amphistegina is the most common epiphytic, symbiont- bearing large foraminifer. In this study we provide additional data on the presence of this species in the coastal ecosystems of Aegean Sea, Greece. The high relative abundance of A. lobifera is the result of very successful adaptation of this species to local conditions and suggests that it has become a significant part of the epiphytic foraminiferal fauna.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

The presence of the Indo-Pacific symbiont-bearing foraminifer Amphistegina lobifera in Greek coastal ecosystems (Aegean Sea, Eastern Mediterranean)

2009

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“…Thus, the probability of recording any short period (~10 4 yr) of signifi cant change in the surface-ocean chemistry (mainly decreases in surface ocean pH) is relatively good. Our larger benthic foraminifera do not show clear evidence of morphological abnormalities (e.g., on July 26, 2012 gsabulletin.gsapubs.org Downloaded from brakeage and repair or distorted shells) that might suggest problems during biocalcifi cation processes (Toler and Hallock, 1998). Either the carbon release during the Paleocene-Eocene thermal maximum was too slow to signifi cantly acidify surface water (e.g., Zachos et al, 2008;Ridgwell and Schmidt, 2010), or larger benthic foraminifera were relatively insensitive to variations in pH.…”

Section: Ocean Acidifi Cation During the Paleoceneeocene Thermal Maximentioning

confidence: 75%

The Paleocene-Eocene thermal maximum (PETM) in shallow-marine successions of the Adriatic carbonate platform (SW Slovenia)

Zamagni

Mutti

Ballato

et al. 2012

Geological Society of America Bulletin

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The Paleocene-Eocene thermal maximum represents one of the most rapid and extreme warming events in the Cenozoic. Shallow-water stratigraphic sections from the Adriatic carbonate platform offer a rare opportunity to learn about the nature of Paleocene-Eocene thermal maximum and the effects on shallow-water ecosystems. We use carbon and oxygen isotope stratigraphy, in conjunction with detailed larger benthic foraminiferal biostratigraphy, to establish a high-resolution paleoclimatic record for the Paleocene-Eocene thermal maximum. A prominent negative excursion in 13C curves of bulk-rock (~1‰-3‰), matrix (~4‰), and foraminifera (~6‰) is interpreted as the carbon isotope excursion during the Paleocene-Eocene thermal maximum. The strongly 13C-depleted 13C record of our shallow-marine carbonates compared to open-marine records could result from organic matter oxidation, suggesting intensified weathering, runoff, and organic matter flux. The Ilerdian larger benthic foraminiferal turnover is documented in detail based on high-resolution correlation with the carbon isotopic excursion. The turnover is described as a two-step process, with the first step (early Ilerdian) marked by a rapid diversifi-cation of small alveolinids and nummulitids with weak adult dimorphism, possibly as adaptations to fluctuating Paleocene-Eocene thermal maximum nutrient levels, and a second step (middle Ilerdian) characterized by a further specific diversification, increase of shell size, and well-developed adult dimorphism. Within an evolutionary scheme controlled by long-term biological processes, we argue that high seawater temperatures could have stimulated the early Ilerdian rapid specific diversification. Together, these data help elucidate the effects of global warming and associated feedbacks in shallow-water ecosystems, and by inference, could serve as an assessment analog for future changes. © 2012 Geological Society of America

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“…Morphological irregularities such as distorted growth, twin tests and merged tests in some modern and extinct larger and smaller benthic foraminifera are considered to develop by the influence of a high stressed environment (Hallock et al, 1986;Toler and Hallock, 1998;Stouff et al, 1999a,b;Hallock and Talge, 1994;Meric et al, 2001Meric et al, , 2004. Developments of morphological variations, ecophenotypic variants and test irregularities though less common in planktonic foraminifera, are explained by similar cause (Nash, 1981;Boltovskoy, 1982;Garstel et al, 1986;Koutsoukos, 1996;Coccioni and Luciani, 2006).…”

Section: Discussionmentioning

confidence: 99%

Morphogroups and small sized tests in Pseudotextularia elegans (Rzehak) from the Late Maastrichtian succession of Meghalaya, India as indicators of biotic response to paleoenvironmental stress

Mukhopadhyay

2012

Journal of Asian Earth Sciences

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Shell malformation in stressed Amphistegina populations: relation to biomineralization and paleoenvironmental potential

Cited by 37 publications

References 22 publications

The presence of the Indo-Pacific symbiont-bearing foraminifer Amphistegina lobifera in Greek coastal ecosystems (Aegean Sea, Eastern Mediterranean)

The presence of the Indo-Pacific symbiont-bearing foraminifer Amphistegina lobifera in Greek coastal ecosystems (Aegean Sea, Eastern Mediterranean)

The Paleocene-Eocene thermal maximum (PETM) in shallow-marine successions of the Adriatic carbonate platform (SW Slovenia)

Morphogroups and small sized tests in Pseudotextularia elegans (Rzehak) from the Late Maastrichtian succession of Meghalaya, India as indicators of biotic response to paleoenvironmental stress

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