Oxygen and carbon stable isotopes of modern land snail shells as environmental indicators from a low-latitude oceanic island

Oxygen isotope signatures from land snail ( Helix melanostoma ) shells and body fluid: Proxies for reconstructing Mediterranean and North African rainfall

“…Craig & Gordon 1965;Grossman & Ku 1986) to calculate theoretical predicted mean lifetime δ 18 O body values (e.g. Lécolle 1985;Yanes et al, 2008Yanes et al, , 2009). To compare with previous studies, we also calculated predicted mean lifetime oxygen isotope compositions of snail body fluid (δ 18 O body, predicted ) for each collection site using the equation of Grossman and Ku (1986) (T°C = 20.6 − 4.94(δ 18 O shell − δ 18 O water )) with site averaged δ 18 O shell and mean annual temperature (Fig.…”

“…Grossman and Ku 1986) to calculate theoretical snail δ 18 O body values based on measured δ 18 O shell and local mean annual temperature (MAT) (e.g. Zanchetta et al 2005;Yanes et al 2008Yanes et al , 2009. However, such methods assume an uncomplicated relationship between δ 18 O body , δ 18 O shell and temperature that may not hold for all regions or all species.…”

“…Lécolle 1985;Goodfriend et al 1989;Goodfriend & Ellis 2002;Zanchetta et al 2005;Kehrwald et al 2010;Colonese et al 2011), whilst in others, temperature and/or humidity are additional controlling variables (e.g. Yapp 1979;Goodfriend & Magaritz 1987;Bonadonna et al 1999;Leone et al 2000;Yanes et al 2008Yanes et al , 2009Colonese et al 2014). In more arid climates, the correlation with δ 18 O rain may be complicated because atmospheric water vapour, although largely derived from precipitation in some seasons (e.g.…”

Stable isotopic signatures of the modern land snail Eremina desertorum from a low-latitude (hot) dry desert—A study from the Petrified Forest, New Cairo, Egypt

“…of the snails (Stott, 2002). In short, the ␦ 13 C values of land snail records should reflect the ␦ 13 C compositions of carbon sources that the organism consumed (e.g., Goodfriend and Magaritz, 1987;Goodfriend, 1988Goodfriend, , 1990Goodfriend, , 1992Ellis, 2000, 2002;Balakrishnan et al, 2005a,b;Yanes et al, 2008Yanes et al, , 2009). These compositions are a reflection of the climatic conditions such as humidity or aridity of an environment.…”

Oxygen isotopes in Molluscan shell: Applications in environmental archaeology

“…Goodfriend and Ellis 2002;Colonese et al 2010). In some calciophilous species, the contribution of soil carbonates to the diet seems to be important (Yanes et al 2009). …”