Web of Science: 1 cites, Scopus: 2 cites, Google Scholar: cites,
Nematode distributions as spatial null models for macroinvertebrate species richness across environmental gradients : a case from mountain lakes
Mendoza, Guillermo de (Centre d'Estudis Avançats de Blanes)
Traunspurger, Walter (Bielefeld Universität. Department of Animal Ecology)
Palomo González, Alejandro (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)
Catalan, Jordi (Centre de Recerca Ecològica i Aplicacions Forestals)

Data: 2017
Resum: Nematode species are widely tolerant of environmental conditions and disperse passively. Therefore, the species richness distribution in this group might largely depend on the topological distribution of the habitats and main aerial and aquatic dispersal pathways connecting them. If so, the nematode species richness distributions may serve as null models for evaluating that of other groups more affected by environmental gradients. We investigated this hypothesis in lakes across an altitudinal gradient in the Pyrenees. We compared the altitudinal distribution, environmental tolerance, and species richness, of nematodes with that of three other invertebrate groups collected during the same sampling: oligochaetes, chironomids, and nonchironomid insects. We tested the altitudinal bias in distributions with t-tests and the significance of narrow-ranging altitudinal distributions with randomizations. We compared results between groups with Fisher's exact tests. We then explored the influence of environmental factors on species assemblages in all groups with redundancy analysis (RDA), using 28 environmental variables. And, finally, we analyzed species richness patterns across altitude with simple linear and quadratic regressions. Nematode species were rarely biased from random distributions (5% of species) in contrast with other groups (35%, 47%, and 50%, respectively). The altitudinal bias most often shifted toward low altitudes (85% of biased species). Nematodes showed a lower portion of narrow-ranging species than any other group, and differed significantly from nonchironomid insects (10% and 43%, respectively). Environmental variables barely explained nematode assemblages (RDA adjusted R² = 0. 02), in contrast with other groups (0. 13, 0. 19 and 0. 24). Despite these substantial differences in the response to environmental factors, species richness across altitude was unimodal, peaking at mid elevations, in all groups. This similarity indicates that the spatial distribution of lakes across altitude is a primary driver of invertebrate richness. Provided that nematodes are ubiquitous, their distribution offers potential null models to investigate species richness across environmental gradients in other ecosystem types and biogeographic regions.
Nota: Número d'acord de subvenció EC/FP6/505540
Nota: Número d'acord de subvenció EC/FP5/00032
Nota: Número d'acord de subvenció MINECO/CGL2013‐45348‐P
Nota: Número d'acord de subvenció AGAUR/2014/SGR-1249
Drets: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. Creative Commons
Llengua: Anglès.
Document: article ; recerca ; publishedVersion
Matèria: Chironomidae ; Insecta ; Nematoda ; Oligochaeta ; Pyrenees ; Biodiversity ; Mountain lakes
Publicat a: Ecology and evolution, Vol. 7, issue 9 (May 2017) , p. 3016-3028, ISSN 2045-7758

DOI: 10.1002/ece3.2842
PMID: 28480001

13 p, 798.2 KB

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Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Articles > Articles de recerca
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 Registre creat el 2017-11-24, darrera modificació el 2019-02-11

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