High-Resolution Paleoclimate Reconstruction Over the Last Two Millennia in the Eastern Subtropical Atlantic Ocean

Parker, Wesley G.; Yanes, Yurena; Surge, Donna; Mesa-Hernández, Eduardo

doi:10.1130/abs/2018am-319468

Cited by 1 publication

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“…Bocherens et al [18] argued that this trend reflects a reduction in temperatures and increasing aridity over time. Yet regional climate data indicate that temperature has remained relatively constant throughout the Holocene [66,116], and increasing aridity would be expected to result in increased δ 15 N values, e.g., [51,52]. Moreover, a similar trend is not observed for the individuals at Buenavista (Figure 6).…”

Section: Extinction History and Temporal Isotopic Trends For Canariommentioning

confidence: 91%

“…The fog bank that forms between 400 and 1200 m on the northern slope of Tenerife and is responsible for relatively low δ 13 C values in cloud forest vegetation is caused by orographic uplift of the moisture-laden northeastern trade winds [115]. Regional shifts in climate since the late Pleistocene [67][68][69]116] may have impacted fog formation, which, in turn, would have affected δ 13 C values for cloud forest vegetation, e.g., [117][118][119]. As mentioned below, elevated δ 13 C values for C. bravoi that lived during the Late Pleistocene likely reflect more arid conditions [66,103].…”

Section: Reconstructing Diet and Habitat For Now-extinct Taxamentioning

confidence: 99%

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Revisiting the Foraging Ecology and Extinction History of Two Endemic Vertebrates from Tenerife, Canary Islands

et al. 2019

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We used carbon (δ13C) and nitrogen (δ15N) isotopes to examine the foraging ecology of Tenerife giant rats (Canariomys bravoi) and lizards (Gallotia goliath) in northwestern Tenerife, which until recently, were the island’s largest terrestrial vertebrates. We combined new isotope data for 28 C. bravoi and 14 G. goliath with published regional data for both species and then compared these with data for co-occurring extant taxa and modern C3 plants. Isotope data suggest both extinct species relied primarily on C3 resources and were trophic omnivores. However, the two species appear to have partitioned their resources when living in sympatry. Isotopic overlap between C. bravoi and Rattus spp., and between G. goliath, extant Gallotia galloti, and introduced rabbits (Oryctolagus cuniculus) suggests reliance on similar foods. We radiocarbon dated four C. bravoi and two G. goliath with the most extreme isotope values. These new dates do not settle the question of what triggered the demise of either species. Nevertheless, the data are most consistent with anthropogenically-induced extinction. Temporal isotopic trends contradict expectations if regional climate were responsible, and confidence intervals for radiocarbon dates suggest it is highly likely that both species were present when humans first settled the island.

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Section: Extinction History and Temporal Isotopic Trends For Canariommentioning

confidence: 91%

Section: Reconstructing Diet and Habitat For Now-extinct Taxamentioning

confidence: 99%

Revisiting the Foraging Ecology and Extinction History of Two Endemic Vertebrates from Tenerife, Canary Islands

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

High-Resolution Paleoclimate Reconstruction Over the Last Two Millennia in the Eastern Subtropical Atlantic Ocean

Cited by 1 publication

References 0 publications

Revisiting the Foraging Ecology and Extinction History of Two Endemic Vertebrates from Tenerife, Canary Islands

Revisiting the Foraging Ecology and Extinction History of Two Endemic Vertebrates from Tenerife, Canary Islands

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