| publications-1071 |
PEER REVIEWED ARTICLE |
2017 |
Ivan González-Bergonzoni , Kasper L. Johansen , Anders Mosbech , Frank Landkildehus , Erik Jeppesen , Thomas A. Davidson |
Small birds, big effects: the little auk ( Alle alle ) transforms high Arctic ecosystems |
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10.1098/rspb.2016.2572 |
Uncategorized |
River Basins |
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In some arctic areas, marine-derived nutrients (MDN) resulting from fish migrations fuel freshwater and terrestrial ecosystems, increasing primary production and biodiversity. Less is known, however, about the role of seabird-MDN in shaping ecosystems. Here, we examine how the most abundant seabird in the North Atlantic, the little auk (Alle alle), alters freshwater and terrestrial ecosystems around the North Water Polynya (NOW) in Greenland. We compare stable isotope ratios (δ15N andδ13C) of freshwater and terrestrial biota, terrestrial vegetation indices and physical–chemical properties, productivity and community structure of fresh waters in catchments with and without little auk colonies. The presence of colonies profoundly alters freshwater and terrestrial ecosystems by providing nutrients and massively enhancing primary production. Based on elevatedδ15N in MDN, we estimate that MDN fuels more than 85% of terrestrial and aquatic biomass in bird influenced systems. Furthermore, by using different proxies of bird impact (colony distance, algalδ15N) it is possible to identify a gradient in ecosystem response to increasing bird impact. Little auk impact acidifies the freshwater systems, reducing taxonomic richness of macroinvertebrates and truncating food webs. These results demonstrate that the little auk acts as an ecosystem engineer, transforming ecosystems across a vast region of Northwest Greenland. |
603378 |
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| publications-1072 |
PEER REVIEWED ARTICLE |
2017 |
Sandra Brucet , Ignasi Arranz , Thomas Mehner , Christine Argillier , Meryem Beklioğlu , Lluís Benejam , Thomas Boll , Kerstin Holmgren , Torben L. |
Size diversity and species diversity relationships in fish assemblages of Western Palearctic lakes |
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10.1111/ecog.03255 |
Uncategorized |
Natural Water Bodies |
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Body size, coupled with abundance and taxonomy, may help to understand the mechanisms shaping community structure. Since the body size of fish is closely related to their trophic niche, size diversity (based on individual body size) of fish communities may capture intraspecific variations in fish trophic niches that are not detected by species diversity. Thus, the relationship between size diversity and species diversity may help to integrate variation at both intraspecific and interspecific levels. We studied the relationship between species diversity and size diversity as a measure of the degree of overlap in size among species and thereby the potential overlap in niches in a community. We hypothesized that the relationship between size diversity and species would be different across the European continent due to different levels of size overlap in fish communities. The data were derived from samplings of fish communities using standardised benthic gill nets in 363 lakes. At the continental scale, size diversity increased with species diversity; at the ecoregion scale, the slope of the relation changed across the continent, with the greatest mismatch occurring in northern Europe where communities comprised only one or a few species, but each of which exhibited a great range in size. There was an increase in slope towards the south with significant relations for four out of six ecoregions. The steeper size diversity‐species diversity slope at lower latitudes is attributable to a lower overlap in fish size and thus likely to finer niche separation. Our results also suggest that size diversity is not a strong surrogate for species diversity in European lake fish communities. Thus, particularly in fish communities composed of few species, measuring size diversity may help to detect potential functional variation which may be neglected by measuring species diversity alone. |
603378 |
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| publications-1073 |
PEER REVIEWED ARTICLE |
2015 |
Daniel Hering , Laurence Carvalho , Christine Argillier , Meryem Beklioglu , Angel Borja , Ana Cristina Cardoso , Harm Duel , Teresa Ferreira , Lidija |
Managing aquatic ecosystems and water resources under multiple stress — An introduction to the MARS project |
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10.1016/j.scitotenv.2014.06.106 |
Uncategorized |
Natural Water Bodies |
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No abstract available |
603378 |
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| publications-1074 |
PEER REVIEWED ARTICLE |
2016 |
Annette Baattrup-Pedersen , Emma Göthe , Tenna Riis , Matthew T. OHare |
Functional trait composition of aquatic plants can serve to disentangle multiple interacting stressors in lowland streams |
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10.1016/j.scitotenv.2015.11.027 |
Uncategorized |
Natural Water Bodies |
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No abstract available |
603378 |
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| publications-1075 |
PEER REVIEWED ARTICLE |
2016 |
Elisabeth Bondar-Kunze , Stefanie Maier , Doris Schönauer , Nicolas Bahl , Thomas Hein |
Antagonistic and synergistic effects on a stream periphyton community under the influence of pulsed flow velocity increase and nutrient enrichment |
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10.1016/j.scitotenv.2016.08.158 |
Uncategorized |
Natural Water Bodies |
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No abstract available |
603378 |
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| publications-1076 |
PEER REVIEWED ARTICLE |
2016 |
M.J. Bowes , M. Loewenthal , D.S. Read , M.G. Hutchins , C. Prudhomme , L.K. Armstrong , S.A. Harman , H.D. Wickham , E. Gozzard , L. Carvalho |
Identifying multiple stressor controls on phytoplankton dynamics in the River Thames (UK) using high-frequency water quality data |
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10.1016/j.scitotenv.2016.06.239 |
Uncategorized |
Natural Water Bodies |
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No abstract available |
603378 |
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| publications-1077 |
PEER REVIEWED ARTICLE |
2016 |
Paulo Branco , José M. Santos , Susana Amaral , Filipe Romão , António N. Pinheiro , Maria T. Ferreira |
Potamodromous fish movements under multiple stressors: Connectivity reduction and oxygen depletion |
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10.1016/j.scitotenv.2016.08.070 |
Uncategorized |
River Basins |
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No abstract available |
603378 |
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| publications-1078 |
PEER REVIEWED ARTICLE |
2016 |
D. Bruno , C. Gutiérrez-Cánovas , J. Velasco , D. Sánchez-Fernández |
Functional redundancy as a tool for bioassessment: A test using riparian vegetation |
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10.1016/j.scitotenv.2016.05.186 |
Uncategorized |
Natural Water Bodies |
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No abstract available |
603378 |
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| publications-1079 |
PEER REVIEWED ARTICLE |
2016 |
Gianbattista Bussi , Paul G. Whitehead , Michael J. Bowes , Daniel S. Read , Christel Prudhomme , Simon J. Dadson |
Impacts of climate change, land-use change and phosphorus reduction on phytoplankton in the River Thames (UK) |
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10.1016/j.scitotenv.2016.02.109 |
Uncategorized |
Natural Water Bodies |
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No abstract available |
603378 |
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| publications-1080 |
PEER REVIEWED ARTICLE |
2016 |
Jan Coppens , Arda Özen , Ü. Nihan Tavşanoğlu , Şeyda Erdoğan , Eti E. Levi , Ceylan Yozgatlıgil , Erik Jeppesen , Meryem Beklioğlu |
Impact of alternating wet and dry periods on long-term seasonal phosphorus and nitrogen budgets of two shallow Mediterranean lakes |
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10.1016/j.scitotenv.2016.04.028 |
Uncategorized |
River Basins |
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No abstract available |
603378 |
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