Výsledky vyhledávání - "Roger I Jones"

Akademický článek

Land Use Affects Carbon Sources to the Pelagic Food Web in a Small Boreal Lake.

Autor: Päivi Rinta, Maarten van Hardenbroek, Roger I Jones, Paula Kankaala, Fabian Rey, Sönke Szidat, Matthew J Wooller, Oliver Heiri

Publikováno v: PLoS ONE, Vol 11, Iss 8, p e0159900 (2016)

Small humic forest lakes often have high contributions of methane-derived carbon in their food webs but little is known about the temporal stability of this carbon pathway and how it responds to environmental changes on longer time scales. We reconst

Externí odkaz: https://doaj.org/article/355853643bfe477c97c42e68c2db1732

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Akademický článek

Inferring Phytoplankton, Terrestrial Plant and Bacteria Bulk δ¹³C Values from Compound Specific Analyses of Lipids and Fatty Acids.

Autor: Sami J Taipale, Elina Peltomaa, Minna Hiltunen, Roger I Jones, Martin W Hahn, Christina Biasi, Michael T Brett

Publikováno v: PLoS ONE, Vol 10, Iss 7, p e0133974 (2015)

Stable isotope mixing models in aquatic ecology require δ13C values for food web end members such as phytoplankton and bacteria, however it is rarely possible to measure these directly. Hence there is a critical need for improved methods for estimat

Externí odkaz: https://doaj.org/article/debd37ac30d24d59956699714de64c7c

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Akademický článek

An empirical evaluation of the utility of convex hull and standard ellipse areas for assessing population niche widths from stable isotope data.

Autor: Jari Syväranta, Anssi Lensu, Timo J Marjomäki, Sari Oksanen, Roger I Jones

Publikováno v: PLoS ONE, Vol 8, Iss 2, p e56094 (2013)

Stable isotope analyses are increasingly employed to characterise population niche widths. The convex hull area (TA) in a δ(13)C-δ(15)N biplot has been used as a measure of isotopic niche width, but concerns exist over its dependence on sample size

Externí odkaz: https://doaj.org/article/884b94248ea644c0aa8fb70d8d92de90

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Akademický článek

Bacterial and phytoplankton responses to nutrient amendments in a boreal lake differ according to season and to taxonomic resolution.

Autor: Sari Peura, Alexander Eiler, Minna Hiltunen, Hannu Nykänen, Marja Tiirola, Roger I Jones

Publikováno v: PLoS ONE, Vol 7, Iss 6, p e38552 (2012)

Nutrient limitation and resource competition in bacterial and phytoplankton communities may appear different when considering different levels of taxonomic resolution. Nutrient amendment experiments conducted in a boreal lake on three occasions durin

Externí odkaz: https://doaj.org/article/dc71eed119da40fcb9159fab54ed985f

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A Bayesian stable isotope mixing model for coping with multiple isotopes, multiple trophic steps and small sample sizes

Autor: Risto Heikkinen, Heikki Hämäläinen, Mikko Kiljunen, Salme Kärkkäinen, Jos Schilder, Roger I. Jones

We introduce a Bayesian stable isotope mixing model for estimating the relative contributions of different dietary components to the tissues of consumers within food webs. The model is implemented with the probabilistic programming language Stan. The

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::880772f55bdf2ddb2e5157568b365897
http://urn.fi/URN:NBN:fi:jyu-202210174893

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Allochthony, fatty acid and mercury trends in muscle of Eurasian perch (Perca fluviatilis) along boreal environmental gradients

Autor: Ossi Keva, Mikko Kiljunen, Heikki Hämäläinen, Roger I. Jones, Kimmo K. Kahilainen, Paula Kankaala, Miikka B. Laine, Jos Schilder, Ursula Strandberg, Jussi Vesterinen, Sami J. Taipale

Environmental change, including joint effects of increasing dissolved organic carbon (DOC) and total phosphorus (TP) in boreal northern lakes could potentially affects food web energy sources and the biochemical composition of organisms. These enviro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::98929e5c4eff4e47cc908f37403e59c5
http://urn.fi/URN:NBN:fi:jyu-202206143310

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