On Earth and Life

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  • Created by: Sophie
  • Created on: 11-05-15 14:33

1. Which is not a feature of Trewick et al (2007) Hello New Zealand?

  • It is widely accepted that the flora and fauna is primarily ancient and of vicariant Gondwannan origin
  • There is decreasing evidence from molecular data that much of this biodiversity is the product of evolution following relatively recent colonization
  • Oceanic islands, generally the products of volcanic activity, provide natural experiments as biological populations are well delimited and the age of islands can be determined using radiometric dating.
  • Whether modern NZ has a terrestrial link through time with the continent Zealandia or whether NZ present terrestrial existence is the product of tectonic activity initiated around 2.6 Ma?
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2. Which is not a feature of Giribet and Boyer (2010) Moa's Ark or Goodbye Gondwanna?

  • NZ has been traditionally considered to host ancient bioata that originated by dispersal after it separated from Australia, 80mya
  • NZ had indeed had old lineages as well as recently diversified lineages and compare this situation with that of other more stable areas of Neotropics.
  • The ancient origins of its biota have been questioned recently with some suggesting that all current land organisms had to arrive to the islands after it re-emerged from the ocean 22mya
  • NZ has been traditionally considered to host ancient bioata that originated by vicariance after it separated from Australia, 80mya
  • Short range endemic soil dwelling invertebrates show that at least some of them are the result of old lineages that diversified in NZ before the hypothesised submersion event 22mya

3. Which is not a feature of Lavers, Why Elephants have big ears? (For birds)

  • The age of the mammals is a period of diversification over the past 70 million years and also the age of the birds. Evolution of still in the age of dinosaurs?
  • Birds are driven by powerful metabolic engines, maintain their bodies at a high/constant temps and have extremely high aerobic capacities (39-42'C) Warm blooded
  • Their wing size has decreased over the years for better flights and their beaks have adapted regarding their change in diet

4. Which is not a process seen in Proterozoic ocean chemistry, Canfield (1998)

  • Loss of sulphide in oceans middle to late Proterozoic
  • The sulphur isotope record indicates and increase of ocean sulphate, 2.3 Gyr, leading to an increased rate of sulphide from sulphate reduction
  • Redox sedimentary burial of organic matter, iron and uranium, reflect the conditions previaling during the weathering
  • The sedimentation processes terminated when aerobic bottom waters developed, oxidizing the iron and removing it from the solution
  • Last large precipitation of BIF's around 1.8Gyr, which precipitated from an ocean whose bottom waters contained dissolved ferrous iron

5. Which is not a feature of Lavers, Why Elephants have big ears? (For dinosaurs)

  • He explained his ling of reasoning based in the ecological consequences of differences in metabolic rate and the relationship between predator and prey
  • Made bold claim in the 90's that dinosaurs were warm blooded just like birds and mammals, as they have always been perceived as cold blooded
  • Bakkers 1960 collated info from palaeontologists, biologists and ecologists and reinterpreted the Mesozoic world
  • Claimed they were no longer reptiles as the tetrapod tree showed that they were just a different as mammals were to reptiles

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