Eco-environmental implications of elemental and carbon isotope distributions in ornithogenic sediments from the Ross Sea region, Antarctica

Using visible reflectance spectroscopy to reconstruct historical changes in chlorophyllaconcentration in East Antarctic ponds

“…The lithologic characteristics of the three sediment profiles are shown in Fig. 3, and more detailed information has been reported previously by Nie et al (2012) and Liu et al (2013).…”

“…The significantly positive correlations of P with measured and inferred chlorophyll a (Fig. 5) suggest that the input of penguin guano caused the increase of nutrient levels, which could promote the growth of phytoplankton and the enhancement of primary productivity in these small lake or ponds (Liu et al 2013). Nevertheless, low P and chlorophyll a levels were observed in some samples not affected by penguin guano.…”

Next-generation paleornithology: Technological and methodological advances allow new insights into the evolutionary and ecological histories of living birds

“…The most widely used sedimentary proxies for birds are geochemical, and can be classified as either trace element (Liu et al 2006a, 2006b, Xie and Sun 2008, Brimble et al 2009, Huang et al 2009, Nie et al 2014a or stable isotope (Hawke 2004, Sun et al 2005, Yuan et al 2010, Keatley et al 2011, Liu et al 2013, Nie et al 2014b) proxies. A key strength of geochemical proxies is their ability to record marine inputs into terrestrial ecosystems, and therefore their main utility has been for inferring the past distribution (e.g., Hawke et al 1999, Yuan et al 2010), colony longevity (Hawke 2004), and population trends (e.g., Sun et al 2005, Liu et al 2006a, Huang et al 2009 of marine birds such as procellariiforms and penguins.…”

“…More recently, rare-earth elements have also been proven to be an effective avian proxy , Nie et al 2014a. Isotopic proxies for seabirds include d 15 N (although recently it has been suggested that D 15 N may be more useful in some circumstances; Liu et al 2006, Nie et al 2014b, d 13 C (Liu et al 2006(Liu et al , 2013, and 87 Sr/ 86 Sr ratios (Sun et al 2005). Geochemical proxies have been applied at a local scale (to ornithogenic sediments, i.e.…”

Relationship Between Brain Volume and Brain Width in Mammals and Birds

“…The most widely used sedimentary proxies for birds are geochemical, and can be classified as either trace element (Liu et al 2006a, 2006b, Xie and Sun 2008, Brimble et al 2009, Huang et al 2009, Nie et al 2014a or stable isotope (Hawke 2004, Sun et al 2005, Yuan et al 2010, Keatley et al 2011, Liu et al 2013, Nie et al 2014b) proxies. A key strength of geochemical proxies is their ability to record marine inputs into terrestrial ecosystems, and therefore their main utility has been for inferring the past distribution (e.g., Hawke et al 1999, Yuan et al 2010), colony longevity (Hawke 2004), and population trends (e.g., Sun et al 2005, Liu et al 2006a, Huang et al 2009 of marine birds such as procellariiforms and penguins.…”