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

Spring temperature variability and eutrophication history inferred from sedimentary pigments in the varved sediments of Lake Żabińskie, north-eastern Poland, AD 1907–2008

“…Our calibration of VIS-RS inferred chloropigments with HPLC data is consistent with earlier studies (Das et al, 2005;Rein et al, 2005;Wolfe et al, 2006;Michelutti et al, 2010;Chen et al, 2013). This suggests that the VIS-RS technique yields good results in different lake environments.…”

“…In general, changes in the pigment composition and stratigraphy reflect variations in the phytoplankton structure and abundance (Leavitt and Hodgson, 2001), which in turn reflects changes in light availability, temperature, nutrients, lake stratification, food web and some other factors (Wetzel, 2001). Several studies across the world have demonstrated that sedimentary pigments can be used to infer past climate changes in Scandinavia and Central Europe (Lami et al, 2000), Antarctica (Hodgson et al, 2005;Chen et al, 2013), Mongolia (Nara et al, 2005), Chile (von Gunten et al, 2009a) and Nepal (Lami et al, 2010) or to document changes in the trophic levels of lakes in Florida (Waters et al, 2005), Chile (von Gunten et al, 2009b), Sweden (Reuss et al, 2010), Hungary (Korponai et al, 2011) and Estonia (Leeben et al, 2013) among others.…”

“…Recent advances in reflectance spectroscopic techniques in the visible-near-infrared range of 400-1000 nm (VIS-RS) have shown that, although the pigment measurements are less specific, reflectance spectra can be used to approximate sedimentary chlorophyll a, Chl-a derivatives (chlorins) and carotenoids (Rein and Sirocko, 2002;Das et al, 2005;Wolfe et al, 2006;Michelutti et al, 2010;Chen et al, 2013). In specific cases, changes in the stratigraphy and abundance of these pigments may reflect climate variability (Rein et al, 2005;von Gunten et al, 2009a;Saunders et al, 2013).…”

Distribution patterns and possible influencing factors of As speciation in ornithogenic sediments from the Ross Sea region, East Antarctica

“…In aquatic ecosystems, the metabolic process of phytoplankton may have some influence on the distribution pattern and transformation process of As speciation . Our previous research indicated that the organic matter in the MB6 and BI profiles mainly originated from externally-sourced guano and endogenous algae, while the CC profile did not contain algae, and guano was the main source of organic matter (Chen et al, 2013;Liu et al, 2013). The detailed discussion of organic matter composition in the studied ornithogenic sediments can be found in the Supporting Information.…”

“…All the above analytical methods and data have been reported in detail by Liu et al (2013). The chlorophyll a concentration of sediment samples was analyzed using high performance liquid chromatography coupled with atmospheric pressure chemical ionization mass spectrometry (HPLC-APCI-MS) (Chen et al, 2013). Following the procedure reported by 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 8 Sanei and Goodarzi (2006), Rock-Eval analysis was conducted at the State Key Laboratory of Organic Geochemistry in Guangzhou Institute of Geochemistry, Chinese Academy of Sciences.…”