9 results match your criteria Aquatic Sciences[Journal]

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Longitudinal thermal heterogeneity in rivers and refugia for coldwater species: effects of scale and climate change.

Aquat Sci 2018 Jan;80(3):1-15

Climate Impacts Group, University of Washington, Seattle, WA, USA.

Climate-change driven increases in water temperature pose challenges for aquatic organisms. Predictions of impacts typically do not account for fine-grained spatiotemporal thermal patterns in rivers. Patches of cooler water could serve as refuges for anadromous species like salmon that migrate during summer. Read More

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http://dx.doi.org/10.1007/s00027-017-0557-9DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5854952PMC
January 2018

Long-term evolution of fish communities in European mountainous rivers: past log driving effects, river management and species introduction (Salzach River, Danube).

Aquat Sci 2015;77(3):395-410. Epub 2015 Jun 5.

Institute of Hydrobiology and Aquatic Ecosystem Management, University of Natural Resources and Life Sciences Vienna, Max Emanuelstrasse 17, 1180 Vienna, Austria.

Using historical sources from the turn of the 19th to the 20th century, we investigated the long-term evolution of the fish community in a mountainous river network and the influence of different human uses and management measures. Within the alpine Salzach catchment, historical presence was reconstructed for 26 fish species, abundance classes for 19 species. Due to channelization, flood protection and dam erections, the spatial distribution of fish species was reduced during the 20th century. Read More

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http://dx.doi.org/10.1007/s00027-015-0398-3DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4550260PMC
June 2015
1 Read

Historical ecology of riverine fish in Europe.

Aquat Sci 2015;77(3):315-324. Epub 2015 Jul 7.

Faculty of Interdisciplinary Studies, Institute of Social Ecology, Alpen-Adria-Universität Klagenfurt, Schottenfeldgasse 29, 1070 Vienna, Austria.

The temporal dynamic of riverine ecosystems and their fish communities and populations has been addressed in ecological theory and management for several decades. A growing number of case studies on the historic development especially of European and North American rivers have been published. Nonetheless, a theoretical debate about the contributions and limits of historical approaches and interdisciplinary co-operation is lacking. Read More

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http://dx.doi.org/10.1007/s00027-015-0400-0DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4550263PMC
July 2015
2 Reads

Historical change in fish species distribution: shifting reference conditions and global warming effects.

Aquat Sci 2015;77(3):441-453. Epub 2015 Jan 3.

Institute of Hydrobiology and Aquatic Ecosystem Management, University of Natural Resources and Life Sciences Vienna, Max-Emanuel-Strasse 17, 1180 Vienna, Austria.

Species distributions models (SDM) that rely on estimated relationships between present environmental conditions and species presence-absence are widely used to forecast changes of species distributions caused by global warming but far less to reconstruct historical assemblages. By compiling historical fish data from the turn to the middle of the twentieth century in a similar way for several European catchments (Rhône, Danube), and using already published SDMs based on current observations, we: (1) tested the predictive accuracy of such models for past climatic conditions, (2) compared observed and expected cumulated historical species occurrences at sub-catchment level, and (3) compared the annual variability in the predictions within one sub-catchment (Salzach) under a future climate scenario to the long-term variability of occurrences reconstructed during an extended historical period (1800-2000). We finally discuss the potential of these SDMs to define a "reference condition", the possibility of a shift in baseline condition in relation with anthropogenic pressures, and past and future climate variability. Read More

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http://dx.doi.org/10.1007/s00027-014-0386-zDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4525805PMC
January 2015

Fish remains as a source to reconstruct long-term changes of fish communities in the Austrian and Hungarian Danube.

Aquat Sci 2015;77(3):337-354. Epub 2015 Jun 3.

Institute of Hydrobiology and Aquatic Ecosystem Management, University of Natural Resources and Life Sciences, Vienna, Austria.

The main objective of this paper is to investigate how archaeological fish remains and written historical records can contribute to the reconstruction of long-term developments of fish communities along the Austrian and Hungarian Danube. Although such approaches are sensitive to various factors, the chronological subdivision and relative quantification of proxy data demonstrate environmental and faunal changes from Prehistory onwards. Intensification of fisheries, decline of large specimens and massive exploitation of small and young fish point to increasing pressure along the chronological sequence towards Early Modern times. Read More

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http://dx.doi.org/10.1007/s00027-015-0393-8DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4525806PMC
June 2015
2 Reads

Origin, enzymatic response and fate of dissolved organic matter during flood and non-flood conditions in a river-floodplain system of the Danube (Austria).

Aquat Sci 2014 22;76:115-129. Epub 2013 Oct 22.

Department of Limnology and Oceanography, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria.

Spectroscopic techniques and extracellular enzyme activity measurements were combined with assessments of bacterial secondary production (BSP) to elucidate flood-pulse-linked differences in carbon (C) sources and related microbial processes in a river-floodplain system near Vienna (Austria). Surface connection with the main channel significantly influenced the quantity and quality of dissolved organic matter (DOM) in floodplain backwaters. The highest values of dissolved organic carbon (DOC) and chromophoric DOM (CDOM) were observed during the peak of the flood, when DOC increased from 1. Read More

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http://dx.doi.org/10.1007/s00027-013-0318-3DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3883529PMC
October 2013
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Cumulative effects of land use on fish metrics in different types of running waters in Austria.

Aquat Sci 2012;74(2):329-341. Epub 2011 Aug 5.

Department of Water, Atmosphere and Environment, Institute of Hydrobiology and Aquatic Ecosystem Management, BOKU, University of Natural Resources and Life Sciences, Max Emanuel-Strasse 17, 1180 Vienna, Austria.

The catchment land-use composition of 249 fish sampling sites in Austrian running waters revealed effects on the biological integrity. Beyond correlative analysis, we investigated (1) which land-use category had the strongest effect on fish, (2) whether metrics of functional fish guilds reacted differently, (3) whether there were cumulative effects of land-use categories, and (4) whether effects varied in strength across river types. We fed 5 land-use categories into regression trees to predict the European Fish Index or fish metric of intolerant species (mainly ) Agriculture and urbanisation were the best predictors and indicated significant effects at levels of >23. Read More

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http://dx.doi.org/10.1007/s00027-011-0224-5DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4425263PMC
August 2011
1 Read

Year-round variability of ambient noise in temperate freshwater habitats and its implications for fishes.

Aquat Sci 2010 Jun;72(3):371-378

Department of Behavioural Biology, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria,

Changes in habitat acoustics over the year can potentially affect fish hearing and orientation to sound, especially in temperate climates. This is the first study where year-round changes in ambient noise in aquatic habitats were assessed. Seven different European fresh-water habitats were chosen for this study. Read More

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http://dx.doi.org/10.1007/s00027-010-0136-9DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2948566PMC

Viruses, bacteria and suspended particles in a backwater and main channel site of the Danube (Austria).

Aquat Sci 2008 May;70(2):186-194

University of Vienna, Department of Freshwater Ecology, Althanstrasse 14, 1090 Vienna, Austria.

A short overview of currently available studies on the ecology of viruses in running waters is provided. Additionally, a survey was conducted on the dynamics of both viruses and bacteria in an isolated floodplain segment of the Danube River and in the main channel near Vienna (Austria) during the hydrologically most dynamic phase (spring - summer). The study evaluates the differences between the main channel and the floodplain segment for suspended particle abundance and quality in relation to bacterial and viral parameters; both free-living forms and those attached to particles are examined. Read More

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http://link.springer.com/10.1007/s00027-008-8068-3
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http://dx.doi.org/10.1007/s00027-008-8068-3DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2999825PMC
May 2008
2 Reads
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