caa a22 4500 469077565 CHVBK 20180323132939.0 cr unu---uuuuu 170328e19920101xx s 000 0 eng 10.1007/BF00197032 doi (NATIONALLICENCE)springer-10.1007/BF00197032 Chrysophycean cysts in Sierra Nevada (California) lake sediments: paleoecological potential [Elektronische Daten] [Heath Carney, Mark Whiting, Katharine Duff, Donald Whitehead] Thirty-three lakes in the Sierra Nevada range of California were investigated as part of a paleoecological study of the potential effects of acid deposition on sensitive lake/watershed ecosystems. Chrysophyte cysts from surface sediment samples were analyzed and compared with data on pH and alkalinity. This paper identifies the twenty-five dominant chrysophyte cyst taxa and provides information on their morphology, abundance, distribution and ecology. Chrysophycean cysts were generally abundant and well-preserved in lake sediments of our study sites. Twelve taxa occurred in more than twenty of the thirty-three lakes; these taxa were often quite abundant. In contrast, only nine taxa occurred in ten or fewer lakes. Abundance Weighted Mean (AWM) pH varied from 6.45 to 8.34 and AWM alkalinity varied from 46 to 588 μeq/L. We delineated pH preference categories, based on AWM pH values and frequency diagrams of cyst abundance vs. lake-water pH. We classified five taxa as acidophilous, nine as circumneutrals, six as alkaliphilous and five as indifferent. Given that the cyst types differ greatly in their abundance relative to pH and alkalinity, it is clear that they have potential for paleolimnological studies of Sierra lakes biogeochemistry. Kluwer Academic Publishers, 1992 acidification nationallicence Chrysophyceae nationallicence cyst nationallicence paleolimnology nationallicence Sierra Nevada nationallicence statospore nationallicence stomatocyst nationallicence Carney Heath Department of Biology, Indiana University, 47405, Bloomington, IN, USA aut Whiting Mark Department of Biology, Indiana University, 47405, Bloomington, IN, USA aut Duff Katharine Department of Biology, Queen's University, K7L 3N6, Kingston, Ontario, Canada aut Whitehead Donald Department of Biology, Indiana University, 47405, Bloomington, IN, USA aut Journal of Paleolimnology Kluwer Academic Publishers 7/1(1992-01-01), 73-94 0921-2728 7:1<73 1992 7 10933 https://doi.org/10.1007/BF00197032 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00197032 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Carney Heath Department of Biology, Indiana University, 47405, Bloomington, IN, USA aut NATIONALLICENCE 700 1- Whiting Mark Department of Biology, Indiana University, 47405, Bloomington, IN, USA aut NATIONALLICENCE 700 1- Duff Katharine Department of Biology, Queen's University, K7L 3N6, Kingston, Ontario, Canada aut NATIONALLICENCE 700 1- Whitehead Donald Department of Biology, Indiana University, 47405, Bloomington, IN, USA aut NATIONALLICENCE 773 0- Journal of Paleolimnology Kluwer Academic Publishers 7/1(1992-01-01), 73-94 0921-2728 7:1<73 1992 7 10933 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer