Abteilung Fischökologie & Evolution

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   0 => Snowflake\Publications\Domain\Model\Publicationprototypepersistent entity (uid=25593, pid=124)
      originalId => protected25593 (integer)
      authors => protected'Jardim de Queiroz, L.; Doenz, C. J.; Altermatt, F.; Alth
         er, R.; Borko, Š.; Brodersen, J.; Gossner, M. M.; 
         Graham, C.; Matthews, B.; McFadden, I. R.; Pellissier,&n
         bsp;L.; Schmitt, T.; Selz, O. M.; Villalba, S.; Rüber,&
         nbsp;L.; Zimmermann, N. E.; Seehausen, O.' (360 chars)
      title => protected'Climate, immigration and speciation shape terrestrial and aquatic biodiversi
         ty in the European Alps' (99 chars)
      journal => protected'Proceedings of the Royal Society B: Biological Sciences' (55 chars)
      year => protected2022 (integer)
      volume => protected289 (integer)
      issue => protected'1980' (4 chars)
      startpage => protected'20221020 (10 pp.)' (17 chars)
      otherpage => protected'' (0 chars)
      categories => protected'time for speciation; allopatric speciation; adaptive radiation; Pleistocene 
         refugia; glacial species pump; European Alps' (120 chars)
      description => protected'Quaternary climate fluctuations can affect speciation in regional biodiversi
         ty assembly in two non-mutually exclusive ways: a glacial species pump, wher
         e isolation in glacial refugia accelerates allopatric speciation, and adapti
         ve radiation in underused adaptive zones during ice-free periods. We detecte
         d biogeographic and genetic signatures associated with both mechanisms in th
         e assembly of the biota of the European Alps. Age distributions of endemic a
         nd widespread species within aquatic and terrestrial taxa (amphipods, fishes
         , amphibians, butterflies and flowering plants) revealed that endemic fish e
         volved only in lakes, are highly sympatric, and mainly of Holocene age, cons
         istent with adaptive radiation. Endemic amphipods are ancient, suggesting pr
         eglacial radiation with limited range expansion and local Pleistocene surviv
         al, perhaps facilitated by a groundwater-dwelling lifestyle. Terrestrial end
         emics are mostly of Pleistocene age and are thus more consistent with the gl
         acial species pump. The lack of evidence for Holocene adaptive radiation in 
         the terrestrial biome is consistent with faster recolonization through range
          expansion of these taxa after glacial retreats. More stable and less season
         al ecological conditions in lakes during the Holocene may also have contribu
         ted to Holocene speciation in lakes. The high proportion of young, endemic s
         pecies makes the Alpine biota vulnerable to climate change, but the mechanis
         ms and consequences of species loss will likely differ between biomes becaus
         e of their distinct evolutionary histories.' (1563 chars)
      serialnumber => protected'0962-8452' (9 chars)
      doi => protected'10.1098/rspb.2022.1020' (22 chars)
      uid => protected25593 (integer)
      _localizedUid => protected25593 (integer)modified
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      _versionedUid => protected25593 (integer)modified
      pid => protected124 (integer)
   1 => Snowflake\Publications\Domain\Model\Publicationprototypepersistent entity (uid=24051, pid=124)
      originalId => protected24051 (integer)
      authors => protected'Alexander, T.; Seehausen, O.' (38 chars)
      title => protected'Diversity, distribution and community composition of fish in perialpine lake
         s. "Projet Lac" synthesis report' (108 chars)
      journal => protected'' (0 chars)
      year => protected2021 (integer)
      volume => protected0 (integer)
      issue => protected'' (0 chars)
      startpage => protected'284 p' (10 chars)
      otherpage => protected'' (0 chars)
      categories => protected'lake; fish; biodiversity; conservation; endemism; environmental change; moni
         toring; fisheries; biogeography; climate change' (123 chars)
      description => protected'Das Projet Lac war ein grosses Projekt der Eawag und der Universität Bern z
         ur erstmaligen quantitativen Erfassung ganzer Fischgemeinschaften in grossen
          und tiefen Seen in und um die europäischen Alpen mit standardisierten Prob
         enahmeverfahren. Ab 2010 wurden insgesamt 35 Seen in der Schweiz, Italien, F
         rankreich, Deutschland und Österreich untersucht und über 106 Fischarten e
         rfasst. Dieser Bericht fasst die wichtigsten Ergebnisse zusammen, vergleicht
          die Fischgemeinschaften der einzelnen Seen, untersucht ihre Beziehung zu Um
         weltparametern und gibt einen Überblick über die Faktoren, welche die biol
         ogische Vielfalt und die Struktur der Gemeinschaften in diesem wichtigen Ök
         osystem beeinflussen.<br /><br />Le Projet Lac était un grand projet de l'E
         awag et de l'Université de Berne visant à recenser pour la première fois<
         br />de manière quantitative des communautés entières de poissons dans le
         s grands et profonds lacs des Alpes  européennes et de leurs environs, à 
         l'aide de méthodes d'échantillonnage standardisées. A partir de 2010, 35 
         lacs au total ont été étudiés en Suisse, en Italie, en France, en Allema
         gne et en Autriche et plus de 106 espèces de poissons ont été recensées.
          Ce rapport résume les principaux résultats, compare les communautés de p
         oissons des différents lacs, examine leur relation avec les paramètres env
         ironnementaux et donne un aperçu des facteurs qui influencent la diversité
          biologique et la structure des communautés dans cet écosystème important
         .<br /><br />Il Projet Lac era un progetto su larga scala dell'Eawag e dell'
         Università di Berna per la prima indagine quantitativa di intere comunità 
         di pesci in laghi grandi e profondi nelle Alpi europee e dintorni, utilizzan
         do metodi di campionamento standardizzati. A partire dal 2010, un totale di 
         35 laghi in Svizzera, Italia, Francia, Germania e Austria sono stati studiat
         i e sono state registrate oltre 106 specie di pesci. Questo rapporto riassum
         e i risultati principali...' (2908 chars)
      serialnumber => protected'' (0 chars)
      doi => protected'10.55408/eawag:24051' (20 chars)
      uid => protected24051 (integer)
      _localizedUid => protected24051 (integer)modified
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      pid => protected124 (integer)
   2 => Snowflake\Publications\Domain\Model\Publicationprototypepersistent entity (uid=17421, pid=124)
      originalId => protected17421 (integer)
      authors => protected'Doenz,&nbsp;C.&nbsp;J.; Bittner,&nbsp;D.; Vonlanthen,&nbsp;P.; Wagner,&nbsp;
         C.&nbsp;E.; Seehausen,&nbsp;O.' (106 chars)
      title => protected'Rapid buildup of sympatric species diversity in Alpine whitefish' (64 chars)
      journal => protected'Ecology and Evolution' (21 chars)
      year => protected2018 (integer)
      volume => protected8 (integer)
      issue => protected'18' (2 chars)
      startpage => protected'9398' (4 chars)
      otherpage => protected'9412' (4 chars)
      categories => protected'adaptive radiation; Coregonus; evolutionary community assembly; niche partit
         ioning; speciation; stocking' (104 chars)
      description => protected'Adaptive radiations in postglacial fish offer excellent settings to study th
         e evolutionary mechanisms involved in the rapid buildup of sympatric species
          diversity from a single lineage. Here, we address this by exploring the gen
         etic and ecological structure of the largest Alpine whitefish radiation know
         n, that of Lakes Brienz and Thun, using microsatellite data of more than 200
         0 whitefish caught during extensive species-targeted and habitat-randomized 
         fishing campaigns. We find six strongly genetically and ecologically differe
         ntiated species, four of which occur in both lakes, and one of which was pre
         viously unknown. These four exhibit clines of genetic differentiation that a
         re paralleled in clines of eco-morphological and reproductive niche differen
         tiation, consistent with models of sympatric ecological speciation along env
         ironmental gradients. In Lake Thun, we find two additional species, a profun
         dal specialist and a species introduced in the 1930s from another Alpine whi
         tefish radiation. Strong genetic differentiation between this introduced spe
         cies and all native species of Lake Thun suggests that reproductive isolatio
         n can evolve among allopatric whitefish species within 15,000 years and pers
         ist in secondary sympatry. Consistent with speciation theory, we find strong
         er correlations between genetic and ecological differentiation for sympatric
         ally than for allopatrically evolved species.' (1413 chars)
      serialnumber => protected'2045-7758' (9 chars)
      doi => protected'10.1002/ece3.4375' (17 chars)
      uid => protected17421 (integer)
      _localizedUid => protected17421 (integer)modified
      _languageUid => protectedNULL
      _versionedUid => protected17421 (integer)modified
      pid => protected124 (integer)
   3 => Snowflake\Publications\Domain\Model\Publicationprototypepersistent entity (uid=14121, pid=124)
      originalId => protected14121 (integer)
      authors => protected'Alexander,&nbsp;T.&nbsp;J.; Vonlanthen,&nbsp;P.; Seehausen,&nbsp;O.' (67 chars)
      title => protected'Does eutrophication-driven evolution change aquatic ecosystems?' (63 chars)
      journal => protected'Philosophical Transactions of the Royal Society B: Biological Sciences' (70 chars)
      year => protected2017 (integer)
      volume => protected372 (integer)
      issue => protected'1712' (4 chars)
      startpage => protected'20160041 (10 pp.)' (17 chars)
      otherpage => protected'' (0 chars)
      categories => protected'eutrophication; eco-evolutionary dynamics; whitefish; lakes' (59 chars)
      description => protected'Eutrophication increases primary production and changes the relative abundan
         ce, taxonomic composition and spatial distribution of primary producers with
         in an aquatic ecosystem. The changes in composition and location of resource
         s alter the distribution and flow of energy and biomass throughout the foodw
         eb. Changes in productivity also alter the physico-chemical environment, whi
         ch has further effects on the biota. Such ecological changes influence the d
         irection and strength of natural and sexual selection experienced by populat
         ions. Besides altering selection, they can also erode the habitat gradients 
         and/or behavioural mechanisms that maintain ecological separation and reprod
         uctive isolation among species. Consequently, eutrophication of lakes common
         ly results in reduced ecological specialization as well as genetic and pheno
         typic homogenization among lakes and among niches within lakes. We argue tha
         t the associated loss in functional diversity and niche differentiation may 
         lead to decreased carrying capacity and lower resource-use efficiency by con
         sumers. We show that in central European whitefish species radiations, the f
         unctional diversity affected by eutrophication-induced speciation reversal c
         orrelates with community-wide trophic transfer efficiency (fisheries yield p
         er unit phosphorus). We take this as an example of how evolutionary dynamics
          driven by anthropogenic environmental change can have lasting effects on bi
         odiversity and ecosystem functioning.<BR/>This article is part of the themed
          issue ‘Human influences on evolution, and the ecological and societal con
         sequences’.' (1609 chars)
      serialnumber => protected'0962-8436' (9 chars)
      doi => protected'10.1098/rstb.2016.0041' (22 chars)
      uid => protected14121 (integer)
      _localizedUid => protected14121 (integer)modified
      _languageUid => protectedNULL
      _versionedUid => protected14121 (integer)modified
      pid => protected124 (integer)
   4 => Snowflake\Publications\Domain\Model\Publicationprototypepersistent entity (uid=13969, pid=124)
      originalId => protected13969 (integer)
      authors => protected'Alexander,&nbsp;T.&nbsp;J.; Vonlanthen,&nbsp;P.; Périat,&nbsp;G.; Degiorgi,
         &nbsp;F.; Raymond,&nbsp;J.&nbsp;C.; Seehausen,&nbsp;O.' (130 chars)
      title => protected'Estimating whole-lake fish catch per unit effort' (48 chars)
      journal => protected'Fisheries Research' (18 chars)
      year => protected2015 (integer)
      volume => protected172 (integer)
      issue => protected'' (0 chars)
      startpage => protected'287' (3 chars)
      otherpage => protected'303' (3 chars)
      categories => protected'lake fish; multimesh gillnet; volume-weighting; whole-lake CPUE; CEN standar
         d; vertical gill net; perch; coregonus; roach' (121 chars)
      description => protected'The European standard for gillnet sampling to characterize lake fish communi
         ties stratifies sampling effort (<I>i.e.</I>, number of nets) within depth s
         trata. Nets to sample benthic habitats are randomly distributed throughout t
         he lake within each depth strata. Pelagic nets are also stratified by depth,
          but are set only at the deepest point of the lake. Multiple authors have su
         ggested that this design under-represents pelagic habitats, resulting in est
         imates of whole-lake CPUE and community composition which are disproportiona
         tely influenced by ecological conditions of littoral and benthic habitats. T
         o address this issue, researchers have proposed estimating whole-lake CPUE b
         y weighting the catch rate in each depth-compartment by the proportion of th
         e volume of the lake contributed by the compartment. Our study aimed to asse
         ss the effectiveness of volume-weighting by applying it to fish communities 
         sampled according to the European standard (CEN), and by a second whole-lake
          gillnetting protocol (VERT), which prescribes additional fishing effort in 
         pelagic habitats. We assume that convergence between the protocols indicates
          that volume-weighting provides a more accurate estimate of whole-lake catch
          rate and community composition. Our results indicate that volume-weighting 
         improves agreement between the protocols for whole-lake total CPUE, estimate
         d proportion of perch and roach and the overall fish community composition. 
         Discrepancies between the protocols remaining after volume-weighting may be 
         because sampling under the CEN protocol overlooks horizontal variation in pe
         lagic fish communities. Analyses based on multiple pelagic-set VERT nets ide
         ntified gradients in the density and biomass of pelagic fish communities in 
         almost half the lakes that corresponded with the depth of water at net-setti
         ng location and distance along the length of a lake. Additional CEN pelagic 
         sampling effort allocated across water depths and distributed throughout the
          lake would therefore he...' (2170 chars)
      serialnumber => protected'0165-7836' (9 chars)
      doi => protected'10.1016/j.fishres.2015.07.024' (29 chars)
      uid => protected13969 (integer)
      _localizedUid => protected13969 (integer)modified
      _languageUid => protectedNULL
      _versionedUid => protected13969 (integer)modified
      pid => protected124 (integer)
   5 => Snowflake\Publications\Domain\Model\Publicationprototypepersistent entity (uid=13954, pid=124)
      originalId => protected13954 (integer)
      authors => protected'Alexander,&nbsp;T.&nbsp;J.; Vonlanthen,&nbsp;P.; Périat,&nbsp;G.; Degiorgi,
         &nbsp;F.; Raymond,&nbsp;J.-C.; Seehausen,&nbsp;O.' (125 chars)
      title => protected'Evaluating gillnetting protocols to characterize lacustrine fish communities' (76 chars)
      journal => protected'Fisheries Research' (18 chars)
      year => protected2015 (integer)
      volume => protected161 (integer)
      issue => protected'' (0 chars)
      startpage => protected'320' (3 chars)
      otherpage => protected'329' (3 chars)
      categories => protected'multimesh gillnets; CEN standard; vertical net protocol; perch; coregonus' (73 chars)
      description => protected'Ecological research and monitoring of lacustrine ecosystems often requires a
          whole-lake assessment of fish communities. Gillnet sampling offers an effic
         ient means of estimating abundance, biomass and fish community composition. 
         However the choice of gillnet sampling protocol may influence lake character
         ization via physical properties of the nets and allocation of sampling effor
         t between littoral, benthic and pelagic habitats. This paper compares two co
         mmonly used, whole-lake sampling protocols applied across 17 prealpine, suba
         lpine and alpine European lakes ranging widely in size, depth and altitude t
         o determine their relative strength for research and management applications
         . Effort-corrected estimates of abundance, biomass and species richness were
          correlated between the protocols and both distinguished the trout-dominated
          alpine communities from subalpine and prealpine lakes dominated by whitefis
         h and perch. A considerable amount of variance remained unexplained between 
         the two protocols however, which seemed to correspond with differences in th
         e proportion of effort among benthic and pelagic habitats. We suggest that b
         oth the European standard (CEN) and vertical (VERT) netting protocols are su
         itable for assessing ecological status and monitoring changes in lake fish c
         ommunities through time. However the details of each protocol should be kept
          in mind when comparing fish communities between lakes. Mesh sizes used in C
         EN nets produce a more even size frequency distribution, suggesting that thi
         s protocol is most appropriate for assessing size structure of fish assembla
         ges. The high proportion of netting effort in benthic habitats shallower tha
         n 70 m depth under the CEN protocol means that, particularly in larger lakes
         , outcomes will be disproportionately influenced by the ecological condition
          of this habitat. The VERT protocol presumably provides a more accurate esti
         mate of whole-lake CPUE and community composition because effort, in terms o
         f net area, is more even...' (2175 chars)
      serialnumber => protected'0165-7836' (9 chars)
      doi => protected'10.1016/j.fishres.2014.08.009' (29 chars)
      uid => protected13954 (integer)
      _localizedUid => protected13954 (integer)modified
      _languageUid => protectedNULL
      _versionedUid => protected13954 (integer)modified
      pid => protected124 (integer)
   6 => Snowflake\Publications\Domain\Model\Publicationprototypepersistent entity (uid=25069, pid=124)
      originalId => protected25069 (integer)
      authors => protected'Seehausen,&nbsp;O.; Alexander,&nbsp;T.; Egloff,&nbsp;N.; Vonlanthen,&nbsp;P.' (76 chars)
      title => protected'Unerwartete Artenvielfalt in Seen des Alpenraums. Project Lac' (61 chars)
      journal => protected'Aqua & Gas' (10 chars)
      year => protected2022 (integer)
      volume => protected102 (integer)
      issue => protected'7-8' (3 chars)
      startpage => protected'64' (2 chars)
      otherpage => protected'71' (2 chars)
      categories => protected'' (0 chars)
      description => protected'Die grossen Seen des Alpenraums weisen eine einzigartige und bisher nur unvo
         llständig bekannte Fischartenvielfalt auf. Mit dem Projet Lac wurden erstma
         ls systematisch die Fischbestände in 35 Seen des Alpenraums aufgenommen. Di
         e standardisierte Erfassung der Fischgemeinschaften, die Charakterisierung a
         ller Arten und deren korrekte Bestimmung, das Wissen über ihre Ökologie so
         wie die rechtliche Verankerung ihres Schutzes bilden die Grundlage für dere
         n langfristigen Erhalt.' (479 chars)
      serialnumber => protected'2235-5197' (9 chars)
      doi => protected'' (0 chars)
      uid => protected25069 (integer)
      _localizedUid => protected25069 (integer)modified
      _languageUid => protectedNULL
      _versionedUid => protected25069 (integer)modified
      pid => protected124 (integer)
   7 => Snowflake\Publications\Domain\Model\Publicationprototypepersistent entity (uid=25070, pid=124)
      originalId => protected25070 (integer)
      authors => protected'Seehausen,&nbsp;O.; Alexander,&nbsp;T.; Vonlanthen,&nbsp;P.; Egloff,&nbsp;N.' (76 chars)
      title => protected'Einfluss von Umwelt-Faktoren auf Fischartengemeinschaften. Projet Lac' (69 chars)
      journal => protected'Aqua & Gas' (10 chars)
      year => protected2022 (integer)
      volume => protected102 (integer)
      issue => protected'7-8' (3 chars)
      startpage => protected'72' (2 chars)
      otherpage => protected'79' (2 chars)
      categories => protected'' (0 chars)
      description => protected'Mit dem «Projet Lac» wurden erstmals systematisch die Fischbestände in 35
          Seen des Alpenraums aufgenommen. Die Ergebnisse zeigen: Die vorherrschenden
          Umweltbedingungen beeinflussen die Artenzusammensetzung und die Häufigkeit
         en der Fischgemeinschaften massgeblich. Menschliche Einflüsse verändern di
         ese Umweltbedingungen, mit einschneidenden Konsequenzen für die Fischgemein
         schaften. Der Schutz und die Wiederherstellung von wichtigen Lebensräumen v
         on einheimischen Arten, insbesondere in der Tiefe, bei Flussmündungen und a
         m Ufer der Seen muss deshalb vorangetrieben werden.' (583 chars)
      serialnumber => protected'2235-5197' (9 chars)
      doi => protected'' (0 chars)
      uid => protected25070 (integer)
      _localizedUid => protected25070 (integer)modified
      _languageUid => protectedNULL
      _versionedUid => protected25070 (integer)modified
      pid => protected124 (integer)