Oikos

Journal: Oikos

Abbreviation

Oikos

Publisher

Wiley-Blackwell

ISSN

0030-1299
1600-0706

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Publications 1 - 10 of 51

Coevolutionary hotspots and coldspots for host sex and parasite local adaptation in a snail-trematode interaction
King, Kayla C.; Delph, Lynda F.; Jokela, Jukka; et al. (2011)
Oikos
Stoichiometric imbalances between detritus and detritivores are related to shifts in ecosystem functioning
Frainer, André; Jabiol, Jérémy; Gessner, Mark O.; et al. (2016)
Oikos
Host and parasite intervality in differentially human-modified habitats
Llopis-Belenguer, Cristina; Feijen, Frida; Morand, Serge; et al. (2024)
Oikos
Host-parasite interactions are influenced by present and past eco-evolutionary interactions and the local environment. An ecological community defines the potential host range of each parasite and the potential parasite diversity of each host species. Past and present processes translate potential to realised interaction niches of parasite and host species. Host-parasite interactions are antagonistic, which may slow the saturation of their interaction niches. Intervality, a property of bipartite networks, measures saturation of interaction niches. Intervality of a community increases as the interaction niches of species of one guild (e.g. hosts) become saturated for their interactions with another guild (e.g. parasites). Characteristics driving intervality in host and parasite communities are largely unknown, as well as the effect of environmental change on intervality of these communities. In our study, we assess if the characteristics 'phylogenetic relatedness' and 'overlap in ecological interactions' explain intervality of rodent host-helminth parasite communities. In addition, we contrast intervality of these communities from habitats that differ in their history of human-driven modification. We performed the analyses for the interaction niches of both parasites and hosts, independently. Our results indicated that host and parasite communities were non-interval or significantly less interval than expected by chance. Phylogenetic relatedness and overlap in ecological interactions did not explain the maximum values of intervality. We speculate that antagonistic coevolution in host-parasite communities may hinder communities to reach saturation, which would explain why it is difficult to find the characteristics that explain intervality of a community. Interestingly, intervality of the interaction niche of parasites (host range) increased with habitat modification (i.e. saturation increased), whereas intervality of the interaction niche of hosts (parasite diversity) decreased as habitat modification increased. These opposite trends suggest that interaction niches of parasites and hosts respond differently to habitat modification.
Limits to the niche and range margins of alien species
Alexander, Jake; Edwards, Peter J. (2010)
Oikos
Wider spectrum of fruit traits in invasive than native floras may increase the vulnerability of oceanic islands to plant invasions
Kueffer, Christoph; Kronauer, Lilian; Edwards, Peter J. (2009)
Oikos
Seedling performance in a dioecious tree species is similar near female and male conspecific adults despite differences in colonization by arbuscular mycorrhizal fungi
Eck, Jenalle L.; Delavaux, Camille S.; Wilson, Dara M.; et al. (2023)
Oikos
Plant-soil feedbacks (PSFs) are a key driver of species diversity and composition in plant communities worldwide; however, the factors that may cause feedbacks to vary within species are rarely examined. In dioecious species, the strength of feedbacks may differ near female plants that produce seed versus near male plants (which do not) because repeated inputs of seeds and high seedling densities near females may cause accumulation of host-specific soil microbes that influence seedling performance. To test whether conspecific seedling performance is reduced near seed-producing female trees relative to male or heterospecific trees, we conducted shadehouse and field experiments with a dioecious tropical tree species, Virola surinamensis (Myristicaceae), on Barro Colorado Island, Panama. The shadehouse experiment isolated the effect of soil microbial communities on seedling growth and allowed us to quantify colonization by mutualistic arbuscular mycorrhizal (AM) fungi, while the field experiment allowed us to assess seedling survival and growth in the presence of nearby conspecific adults and seedlings. In both experiments, seedling performance was similar between seedlings grown in the soil microbial communities and field environments underneath female conspecific, male conspecific, and heterospecific trees. However, contrary to expectation, seedling colonization by AM fungi was higher in male conspecific soil microbial communities than in female or heterospecific soil microbial communities at the end of the shadehouse experiment. Together, our experiments show that while differences among female and male plants in dioecious species may influence the association of conspecific seedlings with AM fungi in their soils, this variation does not necessarily translate directly to differences in seedling performance, at least over the time frame of our experiments. Studies of additional dioecious species are needed to help determine differences in soil microbial communities beneath male and female plants and to assess the role of seed input versus adult root systems in driving PSFs.
Tolerance of understory plants subject to herbivory by roe deer
Moser, Barbara; Schütz, Martin (2006)
Oikos
Dendritic network structure and dispersal affect temporal dynamics of diversity and species persistence
Seymour, Mathew; Fronhofer, Emanuel A.; Altermatt, Florian (2015)
Oikos
A test of host specialization by insect vectors as a mechanism for reproductive isolation among entomophilous fungal species
Bultman, Thomas L.; Leuchtmann, Adrian (2003)
Oikos
Contrasting effects of tree diversity on young tree growth and resistance to insect herbivores across three biodiversity experiments
Haase, Josephine; Castagneyrol, Bastien; Cornelissen, J.H.C.; et al. (2015)
Oikos

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