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Nitrogen-stable isotope signatures in estuarine food webs : A record of increasing urbanization in coastal watersheds
Nutrient enrichment as a result of anthropogenic activity concentrated along the land-sea margin is increasing eutrophication of near-shore waters across the globe. Management of eutrophication inExpand
Stable isotopes in ecology and environmental science
Contributors. Abbreviations. Introduction. 1. Stable isotope chemistry and measurement: a primer. Elizabeth W. Sulzman. Introduction. What isotopes are, what makes them distinct. Properties ofExpand
Natural abundance-level measurement of the nitrogen isotopic composition of oceanic nitrate: an adaptation of the ammonia diffusion method
We have adapted the “ammonia diffusion” method of nitrate extraction for natural-abundance level nitrogen isotopic measurement of oceanic nitrate. The method involves: (1) sample concentration (byExpand
Isotopic evidence for chemosynthesis‐based nutrition of macrobenthos: The lightness of being at Pacific methane seeps
The importance of chemosynthetic nutritional pathways was examined for macrofaunal invertebrates (.300 mm) from methane seeps in the Gulf of Alaska (4,413‐4,443 m), on the Oregon margin (590 m), andExpand
Trophic relations of brown and black bears in several western North American Ecosystems
Adult male brown bears were more carnivorous than any other age or sex class within these ecosystems, and long-dead bears can be compared to living bears to evaluate historical changes in ecosystems. Expand
Effects of sample preparation on stable isotope ratios of carbon and nitrogen in marine invertebrates: implications for food web studies using stable isotopes
Guidelines for the standardization of sample preparation protocols for isotopic analysis are proposed both for large and small marine invertebrates and recommend avoiding both acid washing and DWR, and performing lipid extraction and gut evacuation in most cases. Expand
Low turnover rates of carbon isotopes in tissues of two nectar-feeding bat species
The findings of low turnover rates in hair was low in L. curasoae and undetectable in G. soricina, which may be explained by the seasonal growth of the hair in these two species. Expand
The role and contribution of the seagrass Posidonia oceanica (L.) Delile organic matter for secondary consumers as revealed by carbon and nitrogen stable isotope analysis
Abstract The δ 13 C and δ 15 N values of primary producers and consumers were studied to obtain information on the trophic role of Posidonia oceanica L. Delile, the dominant primary producer, in aExpand