Jökull - 01.12.2006, Qupperneq 38

Y. Wang and M. J. Wooller
Techniques. D. C. a. F. Coleman, Brian, Ed., pp. 274.
Academic Press, INC., San Diego.
Erskine, P. D., D. M. Bergstrom, S. Schmidt, G. R.
Stewart, C. E. Tweedie and J. D. Shaw 1998.
Subantarctic Macquarie Island - a model ecosystem
for studying animal-derived nitrogen sources using N-
15 natural abundance. Oecologia 117, 187–193.
Evans, R. D. 2001. Physiological mechanisms influencing
plant nitrogen isotope composition. Trends in Plant
Science 6, 121–126.
Fogel, M., M. Wooller, J. Cheeseman, B. Smallwood,
Q. Roberts, I. Romero and M. Jacobson. Nitrogen
Isotopic Tracers of Phosphorus Limitation in Man-
grove Ecosystems. Biogeochemistry, in press.
Fogg, G. E., D. E. Rolston, D. L. Decker, D. T. Louie
and M. E. Grismer, 1998. Spatial variation in nitrogen
isotope values beneath nitrate contamination sources.
Ground Water 36, 418–426.
Garten, C. T. 1992. Nitrogen isotope composition of
ammonium and nitrate in bulk precipitation and forest
throughfall. International J. Environmental Analytical
Chemistry 47, 33–45.
Harris, D., W. R. Horwath and C. van Kessel 2001. Acid
fumigation of soils to remove carbonates prior to total
organic carbon or carbon-13 isotopic analysis. Soil
Science Society of America Journal 65, 1853–1856.
Herczeg, A. L., A. K. Smith and J. C. Dighton 2001. A 120
year record of changes in nitrogen and carbon cycling
in Lake Alexandrina, South Australia: C:N, delta N-
15 and delta C-13 in sediments. Applied Geochemistry
16, 73–84.
Hobbie, E. A., S. A. Macko and H. H. Shugart 1998.
Patterns in N dynamics and N isotopes during primary
succession in Glacier Bay, Alaska. Chemical Geology
152, 3–11.
Hodell, D. A. and C. L. Schelske 1998. Production,
sedimentation, and isotopic composition of organic
matter in Lake Ontario. Limnology and Oceanography
43, 200–214.
Jones, R. I., L. King, M. M. Dent, S. C. Maberly and
C. E. Gibson 2004. Nitrogen stable isotope ratios in
surface sediments, epilithon and macrophytes from
upland lakes with differing nutrient status. Freshwater
Biology 49, 382–391.
Keeley, J. E. and D. R. Sandquist 1992. Carbon - Fresh-
Water Plants. Plant Cell and Environment 15, 1021–
1035.
Kendall, C. 1998. Tracing Nitrogen Sources and Cycling
in Catchments. In: Isotope Tracers in Catchment
Hydrology, C. a. M. Kendall and J. J. (Eds.) Elsevier
Science B. V., Amsterdam, 519–576.
Kielland, K., B. Barnett and D. Schell 1998. Intraseasonal
variation in the delta N-15 signature of taiga trees and
shrubs. Canadian Journal of Forest Research-Revue
Canadienne De Recherche Forestiere 28, 485–488.
Lamb, A. L., M. J. Leng, M. U. Mohammed and H. F.
Lamb 2004. Holocene climate and vegetation change
in the Main Ethiopian Rift Valley, inferred from
the composition (C/N and delta C-13) of lacustrine
organic matter. Quaternary Science Reviews 23, 881–
891.
Lucke, A., G. H. Schleser, B. Zolitschka and J. F. W.
Negendank 2003. A Lateglacial and Holocene organic
carbon isotope record of lacustrine palaeoproductivity
and climatic change derived from varved lake
sediments of Lake Holzmaar, Germany. Quaternary
Science Reviews 22, 569–580.
Martinelli, L. A., M. C. Piccolo, A. R. Townsend, P. M.
Vitousek, E. Cuevas, W. McDowell, G. P. Robertson,
O. C. Santos and K. Treseder 1999. Nitrogen stable
isotopic composition of leaves and soil: Tropical
versus temperate forests. Biogeochemistry 46, 4-65.
McKee, K. L., I. C. Feller, M. Popp and W. Wanek
2002. Mangrove isotopic (delta N-15 and delta C-
13) fractionation across a nitrogen vs. phosphorus
limitation gradient. Ecology 83, 1065–1075.
Meyers, P. A. 1994. Preservation of Elemental and Isotopic
Source Identification of Sedimentary Organic Matter.
Chemical Geology 114, 289–302.
Meyers, P. A., G. E. Tenzer, M. E. Lebo and J. E.
Reuter 1998. Sedimentary record of sources and
accumulation of organic matter in Pyramid Lake,
Nevada, over the past 1,000 years. Limnology and
Oceanography 43, 160–169.
Nadelhoffer, K. F. and B. Fry 1988. Controls on natural N-
15 and C-13 abundances in forest soil organic-matter.
Soil Science Society of America Journal 52, 1633–
1640.
Paerl, H. W. and M. L. Fogel 1994. Isotopic charac-
terization of atmospheric nitrogen inputs as sources
of enhanced primary production in coastal Atlantic-
Ocean waters. Marine Biology 119, 635–645.
Peterson, B. J. and B. Fry 1987. Stable isotopes in
ecosystem studies. Annual Review of Ecology and
Systematics 18, 293–320.
36 JÖKULL No. 56