Staff Publications

Staff Publications

  • external user (warningwarning)
  • Log in as
  • language uk
  • About

    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

    We have a manual that explains all the features 

Records 1 - 3 / 3

  • help
  • print

    Print search results

  • export

    Export search results

  • alert
    We will mail you new results for this query: q=Weyhenmeyer
Check title to add to marked list
Warmer and browner waters decrease fish biomass production
Dorst, Renee M. Van; Gårdmark, Anna ; Svanbäck, Richard ; Beier, Ulrika ; Weyhenmeyer, Gesa A. ; Huss, Magnus - \ 2019
Global Change Biology 25 (2019)4. - ISSN 1354-1013 - p. 1395 - 1408.
biomass production - browning - Climate change - Eurasian perch - fish - individual body grwoth - lakes - length distribution - ontogeny - warming
Climate change studies have long focused on effects of increasing temperatures,
often without considering other simultaneously occurring environmental changes, such as browning of waters. Resolving how the combination of warming and browning of aquatic ecosystems affects fish biomass production is essential for future ecosystem functioning, fisheries, and food security. In this study, we analyzed individual‐ and population‐level fish data from 52 temperate and boreal lakes in Northern Europe, covering large gradients in water temperature and color (absorbance, 420 nm). We show that fish (Eurasian perch, Perca fluviatilis) biomass production decreased with both high water temperatures and brown water color, being lowest in warm and brown lakes. However, while both high temperature and brown water decreased fish biomass production, the mechanisms behind the decrease differed: temperature affected the fish biomass production mainly through a decrease in population standing stock biomass, and through shifts in size‐ and age‐distributions toward a higher proportion of young and small individuals in warm lakes; brown water color, on the other hand, mainly influenced fish biomass production through negative effects on individual body growth and length‐at‐ age. In addition to these
findings, we observed that the effects of temperature and brown water color on
individual‐level processes varied over ontogeny. Body growth only responded positively to higher temperatures among young perch, and brown water color had a stronger negative effect on body growth of old than on young individuals. Thus, to better understand and predict future fish biomass production, it is necessary to integrate both individual‐ and population‐level responses and to acknowledge within species variation. Our results suggest that global climate change, leading to browner and warmer waters, may negatively affect fish biomass production, and this effect may be stronger than caused by increased temperature or water color alone
Snapshot surveys for lake monitoring, more than a shot in the dark
Mantzouki, Evanthia ; Beklioglu, Meryem ; Brookes, Justin D. ; Senerpont Domis, Lisette Nicole de; Dugan, Hilary A. ; Doubek, Jonathan P. ; Grossart, Hans Peter ; Nejstgaard, Jens C. ; Pollard, Amina I. ; Ptacnik, Robert ; Rose, Kevin C. ; Sadro, Steven ; Seelen, Laura ; Skaff, Nicholas K. ; Teubner, Katrin ; Weyhenmeyer, Gesa A. ; Ibelings, Bastiaan W. - \ 2018
Frontiers in Ecology and Evolution 6 (2018)NOV. - ISSN 2296-701X - 5 p.
Lake monitoring - Multi-lake snapshot surveys - Nyquist-shannon sampling theorem - Phytoplankton ecology - Space-for-time substitution
Climate change and the future of freshwater biodiversity in Europe: a primer for policy-makers
Moss, B. ; Hering, D. ; Green, A.J. ; Aidoud, A. ; Becares, E. ; Beklioglu, M. ; Bennion, H. ; Boix, D. ; Carvalho, L. ; Clement, B. ; Davidson, T. ; Declerck, S. ; Dobson, M. ; Donk, E. van; Dudley, B. ; Feuchtmayr, H. ; Friberg, N. ; Grenouillet, G. ; Hillebrand, H. ; Hobaek, A. ; Irvine, K. ; Jeppesen, E. ; Johnson, R. ; Jones, I. ; Kernan, M. ; Lauridsen, T.L. ; Manca, M. ; Meerhoff, M. ; Olafsson, J. ; Ormerod, S. ; Papastergiadou, E. ; Penning, W.E. ; Ptacnik, R. ; Quintana, X. ; Sandin, L. ; Seferlis, M. ; Simpson, G. ; Triga, C. ; Verschoor, A.M. ; Verdonschot, P.F.M. ; Weyhenmeyer, G.A. - \ 2009
Freshwater Reviews 2 (2009)2. - ISSN 1755-084X - p. 103 - 130.
Earth’s climate is changing, and by the end of the 21st century in Europe, average temperatures are likely to have risen by at least 2 °C, and more likely 4 °C, with associated effects on patterns of precipitation and the frequency of extreme weather events. Attention among policy-makers is divided about how to minimise the change, how to mitigate its effects, how to maintain the natural resources on which societies depend and how to adapt human societies to the changes. Natural systems are still seen, through a long tradition of conservation management that is largely species-based, as amenable to adaptive management, and biodiversity, mostly perceived as the richness of plant and vertebrate communities, often forms a focus for planning. We argue that prediction of particular species changes will be possible only in a minority of cases but that prediction of trends in general structure and operation of four generic freshwater ecosystems (erosive rivers, depositional floodplain rivers, shallow lakes and deep lakes) in three broad zones of Europe (Mediterranean, Central and Arctic-Boreal) is practicable. Maintenance and rehabilitation of ecological structures and operations will inevitably and incidentally embrace restoration of appropriate levels of species biodiversity. Using expert judgement, based on an extensive literature, we have outlined, primarily for lay policy makers, the pristine features of these systems, their states under current human impacts, how these states are likely to alter with a warming of 2 °C to 4 °C and what might be done to mitigate this. We have avoided technical terms in the interests of communication, and although we have included full referencing as in academic papers, we have eliminated degrees of detail that could confuse broad policy-making
Check title to add to marked list

Show 20 50 100 records per page

Please log in to use this service. Login as Wageningen University & Research user or guest user in upper right hand corner of this page.