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  • Positive tree diversity effect on fine root biomass: via density dependence rather than spatial root partitioning
    Oikos (IF 3.37) Pub Date : 2020-08-28
    Weixian Zeng; Wenhua Xiang; Bo Zhou; Shuai Ouyang; Yelin Zeng; Liang Chen; Grégoire T. Freschet; Oscar J. Valverde‐Barrantes; Alexandru Milcu

    The importance of species richness to ecosystem functioning and services is a central tenet of biological conservation. However, most of our theory and mechanistic understanding is based on diversity found aboveground. Our study sought to better understand the relationship between diversity and belowground function by studying root biomass across a plant diversity gradient. We collected soil cores

    更新日期:2020-09-18
  • Ant foraging strategies vary along a natural resource gradient
    Oikos (IF 3.37) Pub Date : 2020-09-15
    Udi Segev; Katja Tielbörger; Yael Lubin; Jaime Kigel

    Food selection by foragers is sensitive to the availability of resources, which may vary along geographical gradients. Hence, selectivity of food types by foragers is expected to track these resource gradients. Here we addressed this hypothesis and asked if foraging decisions of seed‐eating ants differ along a geographic gradient of habitat productivity. The study was carried out for two years at five

    更新日期:2020-09-15
  • Teaching and learning in ecology: a horizon scan of emerging challenges and solutions
    Oikos (IF 3.37) Pub Date : 2020-09-15
    Julia Cooke; Yoseph Araya; Karen L. Bacon; Joanna M. Bagniewska; Lesley Batty; Tom R. Bishop; Moya Burns; Magda Charalambous; David R. Daversa; Liam R. Dougherty; Miranda Dyson; Adam M. Fisher; Dan Forman; Cristina Garcia; Ewan Harney; Thomas Hesselberg; Elizabeth A John; Rob Knell; Kadmiel Maseyk; Alice L. Mauchline; Julie Peacock; Angelo P. Pernetta; Jeremy Pritchard; William J. Sutherland; Rebecca

    We currently face significant, anthropogenic, global environmental challenges, and the role of ecologists in mitigating these challenges is arguably more important than ever. Consequently there is an urgent need to recruit and train future generations of ecologists, both those whose main area is ecology, but also those involved in the geological, biological, and environmental sciences.

    更新日期:2020-09-15
  • Mechanistic models can reveal infection pathways from prevalence data: the mysterious case of polar bears Ursus maritimus and Trichinella native
    Oikos (IF 3.37) Pub Date : 2020-09-15
    S. R. Penk; K. Bodner; J. S. Vargas Soto; E. S. Chenery; A. Nascou; P. K. Molnár

    Parasites exhibit a diverse range of life history strategies. Transmission to a host is a key component of each life cycle but the difficulty of observing host–parasite contacts has often led to confusion surrounding transmission pathways. Given limited data on most host–parasite systems, flexible approaches are needed for disentangling the obscure transmission dynamics of these systems. Here, we develop

    更新日期:2020-09-15
  • Tracking dispersal across a patchy landscape reveals a dynamic interaction between genotype and habitat structure
    Oikos (IF 3.37) Pub Date : 2020-09-15
    Allan H. Edelsparre; Mark J. Fitzpatrick; Marco A. Rodriguez; Marla B. Sokolowski

    Theoretical and empirical studies often show that within populations, individuals vary in their propensity to disperse. We aspired to understand how this behavioural variation is impacted by the distribution and pattern of food patches across a landscape. In a series of experiments we examined how inter‐patch distance and the distribution of food patches influenced dispersal in wild‐type strains of

    更新日期:2020-09-15
  • Data collected by fruit body‐ and DNA‐based survey methods yield consistent species‐to‐species association networks in wood‐inhabiting fungal communities
    Oikos (IF 3.37) Pub Date : 2020-08-18
    Sonja Saine; Otso Ovaskainen; Panu Somervuo; Nerea Abrego

    Inferring interspecific interactions indirectly from community data is of central interest in community ecology. Data on species communities can be surveyed using different methods, each of which may differ in the amount and type of species detected, and thus produce varying information on interaction networks. Since fruit bodies reflect only a fraction of the wood‐inhabiting fungal diversity, there

    更新日期:2020-09-15
  • Extreme and variable environmental temperatures are linked to reduction of social network cohesiveness in a highly social passerine
    Oikos (IF 3.37) Pub Date : 2020-08-10
    Margaux Rat; Hugo Mathe‐Hubert; Andrew E. McKechnie; Cedric Sueur; Susan J. Cunningham

    Organisms living in hot, arid environments face important risks associated with hyperthermia and dehydration which are expected to become more severe with climate change. To mitigate these risks, individuals often modify behaviour, e.g. reducing activity and seeking shade. These behavioural modifications may affect interactions between individuals, with consequences for the social structure of groups

    更新日期:2020-09-15
  • Wave energy alters biodiversity by shaping intraspecific traits of a habitat‐forming species
    Oikos (IF 3.37) Pub Date : 2020-09-08
    Maria L. Vozzo; Vivian R. Cumbo; Joseph R. Crosswell; Melanie J. Bishop

    The role of habitat‐forming species in promoting biodiversity is widely acknowledged to vary across environmental gradients according to the extent to which they modify resources and environmental conditions. Population‐ and individual‐level traits of habitat‐forming species that influence species interactions may vary across gradients, but the importance of this indirect effect of environmental context

    更新日期:2020-09-09
  • Individual differences in risk‐taking affect foraging across different landscapes of fear
    Oikos (IF 3.37) Pub Date : 2020-09-08
    Philip O. M. Steinhoff; Bennet Warfen; Sissy Voigt; Gabriele Uhl; Melanie Dammhahn

    One of the strongest determinants of behavioural variation is the trade‐off between resource gain and safety. Although classical theory predicts optimal foraging under risk, empirical studies report large unexplained variation in behaviour. Intrinsic individual differences in risk‐taking behaviour might contribute to this variation. By repeatedly exposing individuals of a small mesopredator to different

    更新日期:2020-09-09
  • Interaction of climate change with effects of conspecific and heterospecific density on reproduction
    Oikos (IF 3.37) Pub Date : 2020-08-18
    Anders Pape Møller; Javier Balbontín; André A. Dhondt; Frank Adriaensen; Alexandr Artemyev; Jerzy Bańbura; Emilio Barba; Clotilde Biard; Jacques Blondel; Jean‐Charles Bouvier; Jordi Camprodon; Francesco Cecere; Motti Charter; Mariusz Cichoń; Camillo Cusimano; Anna Dubiec; Marcel Eens; Tapio Eeva; Peter N. Ferns; Jukka T. Forsman; Aya Goldshtein; Anne E. Goodenough; Andrew G. Gosler; Lars Gustafsson;

    We studied the relationship between temperature and the coexistence of great tit Parus major and blue tit Cyanistes caeruleus, breeding in 75 study plots across Europe and North Africa. We expected an advance in laying date and a reduction in clutch size during warmer springs as a general response to climate warming and a delay in laying date and a reduction in clutch size during warmer winters due

    更新日期:2020-09-08
  • Marine regime shifts impact synchrony of deep‐sea fish growth in the northeast Atlantic
    Oikos (IF 3.37) Pub Date : 2020-08-10
    Susanne E. Tanner; Eva Giacomello; Gui M. Menezes; Alice Mirasole; João Neves; Vera Sequeira; Rita P. Vasconcelos; Ana Rita Vieira; John R. Morrongiello

    The complexity and spatio–temporal scale of populations’ dynamics influence how populations respond to large‐scale ecological pressures. Detecting and attributing synchrony (i.e. temporally coincident fluctuations in populations’ parameters) is key as synchronous populations can become more vulnerable to stochastic events that can affect the viability of harvest and have profound consequences to community

    更新日期:2020-09-08
  • Substantial plasticity of reproduction and parental care in response to local resource availability in a wild clownfish population
    Oikos (IF 3.37) Pub Date : 2020-08-18
    Tina A. Barbasch; Theresa Rueger; Maya Srinivasan; Marian Y. L. Wong; Geoffrey P. Jones; Peter M. Buston

    Plasticity, the capacity of individuals to respond to changing environments by modifying traits, may be critically important for population persistence by allowing for adaptive responses on shorter timescales than genetic change. Here, we use the clown anemonefish Amphiprion percula, whose access to resources is constrained by their anemones, to test the role of plasticity in generating variation in

    更新日期:2020-09-08
  • Tropical cyclones and island area shape species abundance distributions of local tree communities
    Oikos (IF 3.37) Pub Date : 2020-08-20
    Thomas Ibanez; Gunnar Keppel; Cláudia Baider; Chris Birkinshaw; F. B. Vincent Florens; Melinda Laidlaw; Christophe Menkes; Narayanaswamy Parthasarathy; Muthu Rajkumar; Fidy Ratovoson; Ladan Rasingam; Ludovic Reza; Shin‐ichiro Aiba; Edward L. Webb; Runguo Zang; Philippe Birnbaum

    Species abundance distributions (SADs) characterise the distribution of individuals among species. SADs have rarely been explored on islands and the ecological processes shaping SADs are still not fully understood. Notably, the relative importance of disturbance regime in shaping plant SADs remains poorly known. We investigate the relative importance of disturbance regime and island geography on the

    更新日期:2020-09-08
  • Hormonal adjustments to future expectations impact growth and survival in juvenile fish
    Oikos (IF 3.37) Pub Date : 2020-09-03
    Camilla Håkonsrud Jensen; Jacqueline Weidner; Jarl Giske; Sergey Budaev; Christian Jørgensen; Sigrunn Eliassen

    Evolutionary ecology often studies how environmental factors define optimal phenotypes without considering the bodily mechanisms involved in their regulation. Here we used a dynamic optimisation model to investigate optimally concerted hormonal control of the phenotype. We studied a semi‐realistic situation where hormonal control of appetite, metabolism and growth acts to prepare juvenile fish for

    更新日期:2020-09-05
  • The island syndrome hypothesis is only partially validated in two rodent species in an inland–island system
    Oikos (IF 3.37) Pub Date : 2020-07-25
    Tristan Juette; Dany Garant; Joël W. Jameson; Denis Réale

    According to the island syndrome and island rule hypotheses, island isolation and reduced area lead to phenotypic shifts in ecologically relevant traits in insular populations compared to mainland ones. These hypotheses have been built up with oceanic islands in mind or islands where isolation is high and colonization rate relatively limited. This set of hypotheses, however, may not be applicable to

    更新日期:2020-09-03
  • Ecosystem size shapes antipredator trait evolution in estuarine threespine stickleback
    Oikos (IF 3.37) Pub Date : 2020-08-10
    Ben A. Wasserman; Antoine Paccard; Travis M. Apgar; Simone Des Roches; Rowan D. H. Barrett; Andrew P. Hendry; Eric P. Palkovacs

    Ecosystem size is known to influence both community structure and ecosystem processes. Less is known about the evolutionary consequences of ecosystem size. A few studies have shown that ecosystem size shapes the evolution of trophic diversity by shaping habitat heterogeneity, but the effects of ecosystem size on antipredator trait evolution have not been explored. Ecosystem size may impact antipredator

    更新日期:2020-09-03
  • The degree of spatial variation relative to temporal variation influences evolution of dispersal
    Oikos (IF 3.37) Pub Date : 2020-08-07
    Charlotte Sophie Sieger; Thomas Hovestadt

    In the face of ongoing global climate and land use change, organisms have multiple possibilities to cope with the modification of their environment. The two main possibilities are to either adapt locally or disperse to a more suitable habitat. The evolution of both local adaptation and dispersal interacts and can be influenced by the spatial and temporal variation (of e.g. temperature or precipitation)

    更新日期:2020-09-01
  • Habitat deterioration relaxes resource competition and sexual selection in the threespine stickleback
    Oikos (IF 3.37) Pub Date : 2020-08-10
    Eva Henriksson; Ulrika Candolin

    The operation of sexual selection depends on ecological conditions. Thus, changes in environmental conditions because of human activities can alter the strength and direction of sexual selection, with implications for evolutionary trajectories and the viability of populations. We show that aquatic algal blooms can relax the operation of sexual selection by influencing which males are available to attract

    更新日期:2020-09-01
  • Infected or informed? Social structure and the simultaneous transmission of information and infectious disease
    Oikos (IF 3.37) Pub Date : 2020-07-04
    Julian C. Evans; Matthew J. Silk; Neeltje J. Boogert; David J. Hodgson

    Social interactions present opportunities for both information and infection to spread through populations. Social learning is often proposed as a key benefit of sociality, while infectious disease spread are proposed as a major cost. Multiple empirical and theoretical studies have demonstrated the importance of social structure for the transmission of either information or harmful pathogens and parasites

    更新日期:2020-09-01
  • Coordination in parental effort decreases with age in a long‐lived seabird
    Oikos (IF 3.37) Pub Date : 2020-08-28
    Samantha C. Patrick; Alexandre Corbeau; Denis Réale; Henri Weimerskirch

    Biparental care is widespread in avian species. Individuals may match the contribution of their partner, resulting in equal parental effort, or may exploit their partner, to minimise their own investment. These two hypotheses have received much theoretical and empirical attention in short‐lived species, that change mates between seasons. However, in species with persistent pair bonds, where divorce

    更新日期:2020-08-28
  • Shift from short‐term competition to facilitation with drought stress is due to a decrease in long‐term facilitation
    Oikos (IF 3.37) Pub Date : 2020-08-28
    Ghassen Chaieb; Xiangtai Wang; Chedly Abdelly; Richard Michalet

    Disentangling short‐ and long‐term neighbour effects, using both removal and observational methods within a single experiment, has strongly improved our understanding of the driving mechanisms of plant–plant interactions. However, there has been no attempt to assess two important underlying processes of their changes along gradients, either environmental‐severity (changes in target performance without

    更新日期:2020-08-28
  • Local and regional drivers influence how aquatic community diversity, resistance and resilience vary in response to drying
    Oikos (IF 3.37) Pub Date : 2020-08-28
    Romain Sarremejane; Judy England; Catherine E. M. Sefton; Simon Parry; Michael Eastman; Rachel Stubbington

    Disturbance events govern how the biodiversity of ecological communities varies in both space and time. In freshwater ecosystems, there is evidence that local and regional‐scale drivers interact to influence ecological responses to drying disturbances. However, most research provides temporal snapshots at the local scale, whereas few studies encompass a gradient of drying severity spanning multiple

    更新日期:2020-08-28
  • Urbanization drives an early spring for plants but not for pollinators
    Oikos (IF 3.37) Pub Date : 2020-07-13
    Alessandro Fisogni; Nina Hautekèete; Yves Piquot; Marion Brun; Cédric Vanappelghem; Denis Michez; François Massol

    Urbanization is one of the major threats to wild plants and pollinators, and its global increase demands a better understanding of the mechanism driving its negative impact. Urban warming and altered local environmental conditions have the potential to affect the timing of flowering and of pollinator activity. While previous evidence has shown that plant phenology tends to advance in urban areas, little

    更新日期:2020-08-28
  • Community‐wide seed dispersal distances peak at low levels of specialisation in size‐structured networks
    Oikos (IF 3.37) Pub Date : 2020-07-21
    Marjorie C. Sorensen; Isabel Donoso; Eike Lena Neuschulz; Matthias Schleuning; Thomas Mueller

    Network approaches provide insight into the complex web of interspecific interactions that structure ecological communities. However, because data on the functional outcomes of ecological networks are very rarely available, the effect of network structure on ecosystem functions, such as seed dispersal, is largely unknown. Here, we develop a new approach that is able to link interaction networks to

    更新日期:2020-08-28
  • Non‐trophic key players in aquatic ecosystems: a mesocosm experiment
    Oikos (IF 3.37) Pub Date : 2020-07-21
    Eric Puche; Ferenc Jordán; María A. Rodrigo; Carmen Rojo

    The trophic network (TN) has been well stablished, and recently knowledge concerning non‐trophic relationships (NTRs) is receiving increasing attention. Although NTRs can influence trophic ones, network models, including both types of interactions (multi‐interaction network, IN) and changes in the role of nodes when NTRs are added to TN, are scarce. To evaluate the role of NTRs in freshwater shallow

    更新日期:2020-08-28
  • Central place foraging drives niche partitioning in seabirds
    Oikos (IF 3.37) Pub Date : 2020-07-21
    Mark Jessopp; Gavin E. Arneill; Milaja Nykänen; Ashley Bennison; Emer Rogan

    When species coexist, it is expected that they will reduce competition through niche partitioning or spatial segregation. We investigated the importance of niche partitioning versus spatial segregation across a seabird community where food and foraging constraints vary seasonally. Spatial clustering of seabird density in the western Irish Sea occurred in both seasons, with hotspots of seabird occurrence

    更新日期:2020-08-28
  • Effect of experimental DNA demethylation on phytohormones production and palatability of a clonal plant after induction via jasmonic acid
    Oikos (IF 3.37) Pub Date : 2020-08-26
    Vít Latzel; Zuzana Münzbergová; Jiří Skuhrovec; Ondřej Novák; Miroslav Strnad

    Many plant species protect themselves against herbivores through mechanical or chemical so‐called inducible defences (ID). These are regulated via a hormonal cascade which may be under epigenetic control and in which jasmonic acid (JA) plays a prominent role. In this study, we indirectly tested the role of DNA methylation in the production of ID and the synthesis of hormones involved in the ID signalling

    更新日期:2020-08-26
  • Hyaenas and lions: how the largest African carnivores interact at carcasses
    Oikos (IF 3.37) Pub Date : 2020-08-18
    Mar Amorós; José M. Gil‐Sánchez; Beatriz de las N. López‐Pastor; Marcos Moleón

    The study of the competitive interactions between predators has traditionally been approached within the context of predatory behavior. By using a quasi‐experimental, non‐intrusive approach, we go beyond the classical view that predators only compete for living prey and disentangle the mechanisms of exploitative and interference competition between two charismatic apex predators, lions (Panthera leo)

    更新日期:2020-08-18
  • Relationship between individual metabolic rate and patch departure behaviour: evidence from aquatic gastropods
    Oikos (IF 3.37) Pub Date : 2020-07-06
    Francesco Cozzoli; Milad Shokri; Giovanna Ligetta; Mario Ciotti; Vojsava Gjoni; Vanessa Marrocco; Fabio Vignes; Alberto Basset

    Individual energy requirements are tightly related to individual resource use and by extension of space‐use patterns and other traits at higher levels of the ecological hierarchy. However, there is still little experimental evidence linking individual energetics and space‐use behaviour. Individual energy requirements scale mainly with body size and temperature, but these do not explain all individual

    更新日期:2020-08-05
  • Determinants of ecosystem stability in a diverse temperate forest
    Oikos (IF 3.37) Pub Date : 2020-07-13
    Jiri Dolezal; Pavel Fibich; Jan Altman; Jan Leps; Shigeru Uemura; Koichi Takahashi; Toshihiko Hara

    Understanding how diversity affects ecosystem stability is crucial for predicting the consequences of continued habitat and biodiversity loss on ecosystem functions and services. Long‐term productivity stability in plant communities is often associated with greater species, phylogenetic or functional diversity, more complex size and age structures, or higher asynchrony in species fluctuations (compensatory

    更新日期:2020-08-05
  • Move to nocturnality not a universal trend in carnivore species on disturbed landscapes
    Oikos (IF 3.37) Pub Date : 2020-06-02
    Sandra Frey; J. P. Volpe; N. A. Heim; J. Paczkowski; J. T. Fisher

    Anthropogenic landscape change is a leading driver of biodiversity loss. Preceding dramatic changes such as wildlife population declines and range shifts, more subtle responses may signal impending larger‐scale change. For example, disturbance‐induced shifts to species’ activity patterns may disrupt temporal niche partitioning along the 24‐h time axis, compromising community structure via altered competitive

    更新日期:2020-08-01
  • Functional traits determine why species belong to the dark diversity in a dry grassland fragmented landscape
    Oikos (IF 3.37) Pub Date : 2020-06-08
    Rocío Belinchón; Lucie Hemrová; Zuzana Münzbergová

    A challenge for nature conservation is to know why many species are absent from suitable habitats and whether they might be able to disperse and to establish. Here, we used 272 dry grassland patches within a fragmented landscape to investigate the role of local abiotic conditions and dispersal filtering in determining the likelihood of vascular plants to belong to the dark diversity (i.e. absent portion

    更新日期:2020-07-30
  • Fifty years of European ungulate dietary studies: a synthesis
    Oikos (IF 3.37) Pub Date : 2020-07-06
    Robert Spitzer; Annika Felton; Marietjie Landman; Navinder J. Singh; Fredrik Widemo; Joris P. G. M. Cromsigt

    Over recent decades, ungulate populations across Europe have undergone a rapid recovery. While this constitutes a conservation success, there is increasing concern about their impacts on shared resources with humans. Understanding ungulate food choices is crucial for predicting such impacts. Numerous studies have focused on single species or communities at narrow spatial scales. Here, we used 265 published

    更新日期:2020-07-28
  • Thermodynamics of soil organic matter decomposition in semi‐natural oak (Quercus) woodland in southwest Ireland
    Oikos (IF 3.37) Pub Date : 2020-07-04
    Nieves Barros; Irene Fernandez; Ken A. Byrne; A. Jonay Jovani‐Sancho; Eva Ros‐Mangriñan; Lee D. Hansen

    The evolution of soil terrestrial ecosystems is a subject with difficulties to define their maturity and evolutionary state. In the last century, thermodynamics was one of the options considered by ecologists for that goal. Difficulties in quantifying the thermodynamic parameters needed by the evolutionary theories caused that this subject has been practically locked since the end of the last century

    更新日期:2020-07-28
  • Long‐term mechanistic hindcasts predict the structure of experimentally‐warmed intertidal communities
    Oikos (IF 3.37) Pub Date : 2020-07-04
    Diana E. LaScala‐Gruenewald; Mark W. Denny

    Increases in global temperatures are expected to have dramatic effects on the abundance and distribution of species in the coming years. Intertidal organisms, which already experience temperatures at or beyond their thermal limits, provide a model system in which to investigate these effects. We took advantage of a previous study in which experimental plates were deployed in the intertidal zone and

    更新日期:2020-07-28
  • Clonal integration enhances performance of an invasive grass
    Oikos (IF 3.37) Pub Date : 2020-06-29
    James A. Estrada; Chris H. Wilson; S. Luke Flory

    While many clonal plants are highly successful invaders, the contribution of clonal integration (i.e. the translocation of resources among ramets) to invasion is often unknown. We used model simulations to ask if clonal integration would facilitate photosynthate translocation, if the performance of daughter ramets might be enhanced by clonal integration, and if shaded ramets benefited relatively more

    更新日期:2020-07-28
  • Selective disappearance of frail juveniles: consequences for understanding social dominance in adult male elephant seals
    Oikos (IF 3.37) Pub Date : 2020-06-29
    Kyle J. Lloyd; W. Chris Oosthuizen; Rémi Fay; Marthán N. Bester; P. J. Nico de Bruyn

    Individual heterogeneity is variation in trait expression observed among individuals of a population. Individual heterogeneity in the pre‐breeder stage of development is of importance given its eventual contribution to the breeding population's overall reproductive performance. Yet most studies do not consider the role of individual heterogeneity in pre‐breeders when investigating population processes

    更新日期:2020-07-21
  • The stronger, the better – trait hierarchy is driving alien species interaction
    Oikos (IF 3.37) Pub Date : 2020-06-29
    Viktoria Ferenc; Christine S. Sheppard

    Multiple invaders commonly co‐occur in native ecosystems and in some cases have been shown to facilitate each other thus exacerbating impacts on native species, while in other cases one invader may reduce the impact of another due to competition. We therefore aimed at identifying mechanisms driving alien species interactions. We conducted a common garden experiment investigating all pairwise combinations

    更新日期:2020-07-21
  • Leaf traits can be used to predict rates of litter decomposition
    Oikos (IF 3.37) Pub Date : 2020-06-29
    Marc V. Rosenfield; Jason K. Keller; Catrina Clausen; Kimberlee Cyphers; Jennifer L. Funk

    Strong relationships exist between litter chemistry traits and rates of litter decomposition. However, leaf traits are more commonly found in online trait databases than litter traits and fewer studies have examined how well leaf traits predict litter decomposition rates. Furthermore, while bulk leaf nitrogen (N) content is known to regulate litter decomposition, few studies have explored the importance

    更新日期:2020-07-21
  • Primary determinants of communities in deadwood vary among taxa but are regionally consistent
    Oikos (IF 3.37) Pub Date : 2020-06-29
    Jörg Müller; Mike Ulyshen; Sebastian Seibold; Marc Cadotte; Anne Chao; Claus Bässler; Sebastian Vogel; Jonas Hagge; Ingmar Weiß; Petr Baldrian; Vojtěch Tláskal; Simon Thorn

    The evolutionary split between gymnosperms and angiosperms has far‐reaching implications for the current communities colonizing trees. The inherent characteristics of dead wood include its role as a spatially scattered habitat of plant tissue, transient in time. Thus, local assemblages in deadwood forming a food web in a necrobiome should be affected not only by dispersal ability but also by host tree

    更新日期:2020-07-15
  • Which mechanisms are responsible for population patterns across different quality habitats? A new approach
    Oikos (IF 3.37) Pub Date : 2020-06-20
    Benjamin A. Belgrad; Blaine D. Griffen

    Spatial patterns in the abundance, distribution and characteristics of organisms are a fundamental feature of all ecosystems. However, achieving a mechanistic understanding of the forces behind these population patterns is a major challenge for ecologists due to the number and diversity of variables and relationships involved. Here, we developed a spatially‐explicit agent‐based model to determine the

    更新日期:2020-07-15
  • Parasite transmission in aquatic ecosystems under temperature change: effects of host activity and elimination of parasite larvae by filter‐feeders
    Oikos (IF 3.37) Pub Date : 2020-06-20
    Mikhail Gopko; Ekaterina Mironova; Anna Pasternak; Victor Mikheev; Jouni Taskinen

    A moderate increase in temperature is likely to enhance the impact of parasites on aquatic ecosystems. Thus, under higher temperatures, poikilothermic animals (e.g. fish) increase their activity, which can result in a more frequent encounter with parasites and higher infection risk. However, temperature increase may also trigger counteracting processes in ambient communities decreasing the risk of

    更新日期:2020-07-15
  • Nest attentiveness drives nest predation in arctic sandpipers
    Oikos (IF 3.37) Pub Date : 2020-06-08
    Nicolas Meyer; Loïc Bollache; François‐Xavier Dechaume‐Moncharmont; Jérôme Moreau; Eve Afonso; Anders Angerbjörn; Joël Bêty; Dorothée Ehrich; Vladimir Gilg; Marie‐Andrée Giroux; Jannik Hansen; Richard B. Lanctot; Johannes Lang; Nicolas Lecomte; Laura McKinnon; Jeroen Reneerkens; Sarah T. Saalfeld; Brigitte Sabard; Niels M. Schmidt; Benoît Sittler; Paul Smith; Aleksandr Sokolov; Vasiliy Sokolov; Natalia

    Most birds incubate their eggs to allow embryo development. This behaviour limits the ability of adults to perform other activities. Hence, incubating adults trade off incubation and nest protection with foraging to meet their own needs. Parents can either cooperate to sustain this tradeoff or incubate alone. The main cause of reproductive failure at this reproductive stage is predation and adults

    更新日期:2020-07-09
  • Topography consistently drives intra‐ and inter‐specific leaf trait variation within tree species complexes in a Neotropical forest
    Oikos (IF 3.37) Pub Date : 2020-06-11
    Sylvain Schmitt; Bruno Hérault; Émilie Ducouret; Anne Baranger; Niklas Tysklind; Myriam Heuertz; Éric Marcon; Saint Omer Cazal; Géraldine Derroire

    Tropical forests shelter the highest species diversity worldwide, although genus diversity is lower than expected. In the species‐rich genera, species complexes are composed of closely‐related species that share large amounts of genetic variation. Despite the key role of species complexes in diversification, evolution and functioning of ecological communities, little is known on why species complexes

    更新日期:2020-07-09
  • Avian trait specialization is negatively associated with urban tolerance
    Oikos (IF 3.37) Pub Date : 2020-06-20
    Corey T. Callaghan; Yanina Benedetti; John H. Wilshire; Federico Morelli

    Generalist species – with their wide niche breadths – are often associated with urban environments, while specialist species are likely to be most at‐risk of increasing urbanization processes. But studies which quantify the relationship between trait specialization (i.e. niche breadth) and urban tolerance are generally methodologically limited, with repeatable robust methods to easily quantify this

    更新日期:2020-07-09
  • Asymmetric benefits of a heterospecific breeding association vary with habitat, conspecific abundance and breeding stage
    Oikos (IF 3.37) Pub Date : 2020-06-11
    Rose J. Swift; Michael J. Anteau; Erin A. Roche; Mark H. Sherfy; Dustin L. Toy; Megan M. Ring

    Heterospecific breeding associations may benefit individuals by mitigating predation risk but may also create costs if they increase competition for resources or are more easily detectable by predators. Our understanding of the interactions among hetero‐ and conspecifics is often lacking in mixed species colonies. Here, we test how the presence of hetero‐ and conspecifics influence nest and chick survival

    更新日期:2020-07-09
  • Infection state can affect host migratory decisions
    Oikos (IF 3.37) Pub Date : 2020-06-20
    Naven Narayanan Venkatanarayanan; Sandra Ann Binning; Allison K. Shaw

    Organisms across a wide range of taxa use migration as a strategy to avoid, reduce or recover from parasitic infection. Previous work has identified three different processes by which migration can help reduce infection risk and/or costs: migratory escape from infection, migratory culling of infected individuals and migratory recovery from infection. However, most theoretical modelling of host migration

    更新日期:2020-07-09
  • Intraspecific trait variation in personality‐related movement behavior promotes coexistence
    Oikos (IF 3.37) Pub Date : 2020-06-15
    Alexander Milles; Melanie Dammhahn; Volker Grimm

    Movement behavior is an essential element of fundamental ecological processes such as competition and predation. Although intraspecific trait variation (ITV) in movement behaviors is pervasive, its consequences for ecological community dynamics are still not fully understood. Using a newly developed individual‐based model, we analyzed how given and constant ITVs in foraging movement affect differences

    更新日期:2020-07-09
  • Relationships between conifer constitutive and inducible defenses against bark beetles change across levels of biological and ecological scale
    Oikos (IF 3.37) Pub Date : 2020-04-27
    Michael Howe; Charles J. Mason; Claudio Gratton; Ken Keefover‐Ring; Kimberly Wallin; Alvin Yanchuk; Jun Zhu; Kenneth F. Raffa

    Plants resist herbivores using both constitutive and induced defenses. Limited resources and biosynthesis costs of anti‐herbivore compounds may impose tradeoffs between these modalities, but the evidence is conflicting. We postulated that biological and ecological scale may influence potential tradeoffs and analyzed constitutive‐induced relationships from genotypic to interspecific levels. We focused

    更新日期:2020-07-02
  • Predator‐dependent functional responses alter the coexistence and indirect effects among prey that share a predator
    Oikos (IF 3.37) Pub Date : 2020-06-02
    Kyle E. Coblentz; John P. DeLong

    Predator functional responses describe predator feeding rates as a function of prey abundance and are central to predator–prey theory. Despite ample evidence that functional responses also depend on predator abundance, theory incorporating predator‐dependent functional responses has focused almost exclusively on specialist predator–prey pairs or linear food chains. This leaves a large gap in our knowledge

    更新日期:2020-06-02
  • Biomass–density relationships of plant communities deviate from the self‐thinning rule due to age structure and abiotic stress
    Oikos (IF 3.37) Pub Date : 2020-06-02
    Maximiliane Marion Herberich; Sebastian Gayler; Madhur Anand; Katja Tielbörger

    A pertinent debate in plant ecology centers around the generality of the self‐thinning rule. However, studies focused on highly simplified settings such as even‐aged monospecific populations or optimal conditions. This neglects the fact that most natural communities, to which the classical self‐thinning slope is often applied, are age‐structured, composed of multiple species and exposed to various

    更新日期:2020-06-02
  • Bacterial phylogeny predicts volatile organic compound composition and olfactory response of an aphid parasitoid
    Oikos (IF 3.37) Pub Date : 2020-06-02
    Tim Goelen; Islam S. Sobhy; Christophe Vanderaa; Felix Wäckers; Hans Rediers; Tom Wenseleers; Hans Jacquemyn; Bart Lievens

    There is increasing evidence that microorganisms emit a wide range of volatile compounds (mVOCs, microbial volatile organic compounds) that act as insect semiochemicals, and therefore play an important role in insect behaviour. Although it is generally believed that phylogenetically closely related microbes tend to have similar phenotypic characteristics and therefore may elicit similar responses in

    更新日期:2020-06-02
  • Spatial scale, neighbouring plants and variation in plant volatiles interactively determine the strength of host–parasitoid relationships
    Oikos (IF 3.37) Pub Date : 2020-06-02
    Yavanna Aartsma; Silvia Pappagallo; Wopke van der Werf; Marcel Dicke; Felix J. J. A. Bianchi; Erik H. Poelman

    Species‐specific responses to the environment can moderate the strength of interactions between plants, herbivores and parasitoids. However, the ways in which characteristics of plants, such as genotypic variation in herbivore induced volatiles (HIPVs) that attract parasitoids, affect trophic interactions in different contexts of plant patch size and plant neighbourhood is not well understood. We conducted

    更新日期:2020-06-02
  • Multi‐taxon inventory reveals highly consistent biodiversity responses to ecospace variation
    Oikos (IF 3.37) Pub Date : 2020-05-25
    Ane Kirstine Brunbjerg; Hans Henrik Bruun; Lars Dalby; Aimée T. Classen; Camilla Fløjgaard; Tobias G. Frøslev; Oskar Liset Pryds Hansen; Toke Thomas Høye; Jesper Erenskjold Moeslund; Jens‐Christian Svenning; Rasmus Ejrnæs

    Amidst the global biodiversity crisis, identifying general principles for variation of biodiversity remains a key challenge. Scientific consensus is limited to a few macroecological rules, such as species richness increasing with area, which provide limited guidance for conservation. In fact, few agreed ecological principles apply at the scale of sites or reserve management, partly because most community‐level

    更新日期:2020-05-25
  • Temporal flexibility in the structure of plant–pollinator interaction networks
    Oikos (IF 3.37) Pub Date : 2020-05-25
    Paul J. CaraDonna; Nickolas M. Waser

    Ecological communities consist of species that are joined in complex networks of interspecific interaction. These interactions often form and dissolve rapidly, but this temporal variation is not well integrated into our understanding of the causes and consequences of network structure. If interspecific interactions exhibit temporal flexibility across time periods over which organisms co‐occur, then

    更新日期:2020-05-25
  • Decomposability of lichens and bryophytes from across an elevational gradient under standardized conditions
    Oikos (IF 3.37) Pub Date : 2020-05-22
    Kristel van Zuijlen; Ruben E. Roos; Kari Klanderud; Simone I. Lang; David A. Wardle; Johan Asplund

    Lichens and bryophytes are abundant primary producers in high latitude and high elevation ecosystems, and they play an important role in ecosystem processes such as decomposition and nutrient cycling. Despite their importance, little is known about the decomposability of lichens and bryophytes either among or within species, at the whole community level, or how this decomposability is affected by their

    更新日期:2020-05-22
  • An empiricist's guide to modern coexistence theory for competitive communities
    Oikos (IF 3.37) Pub Date : 2020-05-22
    Casey M. Godwin; Feng‐Hsun Chang; Bradley J. Cardinale

    While many ecological theories have historically invoked niche differences as the primary mechanism allowing species coexistence, we now know that coexistence in competitive communities depends on the balance of two opposing forces: niche differences (ND) that determine how species limit their own growth rate versus that of their competitor, and relative fitness differences (RFD) that establish competitive

    更新日期:2020-05-22
  • Lineage and latitudinal variation in Phragmites australis tolerance to herbivory: implications for invasion success
    Oikos (IF 3.37) Pub Date : 2020-05-16
    Jordan R. Croy; Laura A. Meyerson; Warwick J. Allen; Ganesh P. Bhattarai; James T. Cronin

    Herbivores play a critical role in plant invasions either by facilitating or inhibiting species establishment and spread. However, relatively few studies with invasive plant species have focused on the role of plant tolerance and how it varies geographically to influence invasion success. We conducted a common garden study using two lineages (native and invasive) of the grass Phragmites australis that

    更新日期:2020-05-16
  • Live fast, die old: oxidative stress as a potential mediator of an unexpected life‐history evolution
    Oikos (IF 3.37) Pub Date : 2020-05-09
    Nedim Tüzün; Marjan De Block; Robby Stoks

    Intraspecific latitudinal patterns in life history are well documented, yet underlying mechanisms of such patterns are poorly understood. To advance our insights in the evolution of latitudinal differences in two key traits, growth rate and lifespan, we evaluated the potential costs of rapid growth in terms of reduced adult lifespan, and the mediatory role of oxidative stress. We studied latitudinal

    更新日期:2020-05-09
  • Temporal scale‐dependence of plant–pollinator networks
    Oikos (IF 3.37) Pub Date : 2020-05-09
    Benjamin Schwarz; Diego P. Vázquez; Paul J. CaraDonna; Tiffany M. Knight; Gita Benadi; Carsten F. Dormann; Benoit Gauzens; Elena Motivans; Julian Resasco; Nico Blüthgen; Laura A. Burkle; Qiang Fang; Christopher N. Kaiser‐Bunbury; Ruben Alarcón; Justin A. Bain; Natacha P. Chacoff; Shuang‐Quan Huang; Gretchen LeBuhn; Molly MacLeod; Theodora Petanidou; Claus Rasmussen; Michael P. Simanonok; Amibeth H

    The study of mutualistic interaction networks has led to valuable insights into ecological and evolutionary processes. However, our understanding of network structure may depend upon the temporal scale at which we sample and analyze network data. To date, we lack a comprehensive assessment of the temporal scale‐dependence of network structure across a wide range of temporal scales and geographic locations

    更新日期:2020-05-09
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