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You searched for: Journal Oikos Remove constraint Journal: Oikos Publication Year 2019 Remove constraint Publication Year: 2019 Source 2019 v.128 no.7 Remove constraint Source: 2019 v.128 no.7
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1. Allee effects under climate change

Author:
Berec, Luděk
Source:
Oikos 2019 v.128 no.7 pp. 972-983
ISSN:
0030-1299
Subject:
Allee effect; Lymantria dispar; adults; biodiversity; biological control agents; climate change; females; males; mating disruption; models; mortality; predation; temperature
Abstract:
... Understanding how climate change affects population dynamics is crucial for assessing future of biodiversity. Here I ask how can Allee effects, occurring when mean individual fitness is reduced in rare populations, respond to increasing temperature. Despite the role Allee effects play in ecology of invasive, threatened and harvested populations, impacts of climate change on Allee effects are pract ...
DOI:
10.1111/oik.05941

2. Benefits of extra food to reproduction depend on maternal condition

Author:
Podofillini, Stefano; Cecere, Jacopo G.; Griggio, Matteo; Corti, Margherita; De Capua, Enrico L.; Parolini, Marco; Saino, Nicola; Serra, Lorenzo; Rubolini, Diego
Source:
Oikos 2019 v.128 no.7 pp. 943-959
ISSN:
0030-1299
Subject:
Falco naumanni; adults; arms (limbs); birds; body condition; breeding; breeding season; ectoparasites; eggs; feathers; females; flight; food availability; life history; molting; nestlings; nests; oviposition; parasitism; population growth; rearing; reproductive success; resource allocation
Abstract:
... The amount of food resources available to upper‐level consumers can show marked variations in time and space, potentially resulting in food limitation. The availability of food resources during reproduction is a key factor modulating variation in reproductive success and life‐history tradeoffs, including patterns of resource allocation to reproduction versus self‐maintenance, ultimately impacting ...
DOI:
10.1111/oik.06067

3. Competition–defense tradeoff increases the diversity of microbial plankton communities and dampens trophic cascades

Author:
Cadier, Mathilde; Andersen, Ken H.; Visser, Andre W.; Kiørboe, Thomas
Source:
Oikos 2019 v.128 no.7 pp. 1027-1040
ISSN:
0030-1299
Subject:
biomass; community structure; defense mechanisms; ecological communities; ecosystems; environmental factors; eutrophication; feeding methods; functional diversity; metabolism; models; plankton; seasonal variation; trophic relationships
Abstract:
... The competition–defense tradeoff is a significant source of functional diversity in ecological communities. Here, we present a theoretical framework to describe the competition–defense tradeoff and apply it to a size‐based model of a unicellular plankton community. Specifically, we investigate how the emergent community structure depends on the shape of the tradeoff, and on whether the cost of def ...
DOI:
10.1111/oik.06101

4. Distinguishing the signatures of local environmental filtering and regional trait range limits in the study of trait–environment relationships

Author:
Denelle, Pierre; Violle, Cyrille; Munoz, François
Source:
Oikos 2019 v.128 no.7 pp. 960-971
ISSN:
0030-1299
Subject:
Bayesian theory; alpine plants; biogeography; case studies; immigration; leaves; plant communities; snowpack; variance
Abstract:
... Understanding the imprint of environmental filtering on community assembly along environmental gradients is a key objective of trait‐gradient analyses. Depending on local constraints, this filtering generally entails that species departing from an optimum trait value have lower abundances in the community. The community‐weighted mean (CWM) and variance (CWV) of trait values are then expected to de ...
DOI:
10.1111/oik.05851

5. Environmental gradients determine the potential for ecosystem engineering effects

Author:
Grinath, Joshua B.; Larios, Loralee; Prugh, Laura R.; Brashares, Justin S.; Suding, Katharine N.
Source:
Oikos 2019 v.128 no.7 pp. 994-1004
ISSN:
0030-1299
Subject:
arid grasslands; arid lands; burrows; ecosystem engineering; ecosystems; engineering; habitats; landscapes; rain; rodents; soil; soil resources; species diversity
Abstract:
... Understanding processes that determine biodiversity is a fundamental challenge in ecology. At the landscape scale, physical alteration of ecosystems by organisms, called ecosystem engineering, enhances biodiversity worldwide by increasing heterogeneity in resource conditions and enhancing species coexistence across engineered and non‐engineered habitats. Engineering–diversity relationships can var ...
DOI:
10.1111/oik.05768

6. Moving beyond noninformative priors: why and how to choose weakly informative priors in Bayesian analyses

Author:
Lemoine, Nathan P.
Source:
Oikos 2019 v.128 no.7 pp. 912-928
ISSN:
0030-1299
Subject:
Bayesian theory; analysis of variance; ecologists; ecology; evolution; guidelines; philosophy; statistical models
Abstract:
... Throughout the last two decades, Bayesian statistical methods have proliferated throughout ecology and evolution. Numerous previous references established both philosophical and computational guidelines for implementing Bayesian methods. However, protocols for incorporating prior information, the defining characteristic of Bayesian philosophy, are nearly nonexistent in the ecological literature. H ...
DOI:
10.1111/oik.05985

7. Non‐trophic plant–animal interactions mediate positive density dependence among conspecific saplings

Author:
Żywiec, Magdalena; Fedriani, José M.; Kurek, Przemysław; Holeksa, Jan
Source:
Oikos 2019 v.128 no.7 pp. 1041-1050
ISSN:
0030-1299
Subject:
Cervus elaphus; Picea abies; browsing; deer; ecological footprint; forest ecosystems; insects; mortality; old-growth forests; saplings; stand structure; tree mortality; trophic relationships
Abstract:
... Trophic plant–animal interactions (e.g. browsing by ungulates, insect attack) are an important and well‐studied source of mortality in many tree populations. Non‐trophic tree–animal interactions (e.g. deer antler rubbing) also frequently lead to tree death, and thus have significant effects on forest ecosystem functioning, but they are much less well studied than trophic interactions are. As deer ...
DOI:
10.1111/oik.06071

8. Predation risk and resource abundance mediate foraging behaviour and intraspecific resource partitioning among consumers in dominance hierarchies

Author:
Naman, Sean M.; Ueda, Rui; Sato, Takuya
Source:
Oikos 2019 v.128 no.7 pp. 1005-1014
ISSN:
0030-1299
Subject:
Oncorhynchus masou; body size; energy intake; fish; foraging; predation; predator avoidance; risk; socioeconomic status; streams; temperate forests
Abstract:
... Dominance hierarchies and the resulting unequal resource partitioning among individuals are key mechanisms of population regulation. The strength of dominance hierarchies can be influenced by size‐dependent tradeoffs between foraging and predator avoidance whereby competitively inferior subdominants can access a larger proportion of limiting resources by accepting higher predation risk. Foraging‐p ...
DOI:
10.1111/oik.05954

9. Predators and priority effects suggested as potential drivers of microfauna communities in a community transplantation experiment along an elevational gradient

Author:
Busse, Annika; Schoreisz, Jeremias J.; Petermann, Jana S.
Source:
Oikos 2019 v.128 no.7 pp. 929-942
ISSN:
0030-1299
Subject:
Bromeliaceae; climate change; community structure; experimental design; fauna; predation; predators
Abstract:
... Transplantation experiments are a useful method to identify responses of organisms to environmental change. However, they are typically restricted to single or few species. Our experiment was carried out using entire bromeliad‐inhabiting microfauna communities which were transplanted along an elevational gradient, simulating environmental change acting on the communities. Additionally, we manipula ...
DOI:
10.1111/oik.05894

10. Social evolution and the two elements of causation

Author:
Pernu, Tuomas K.; Helanterä, Heikki
Source:
Oikos 2019 v.128 no.7 pp. 905-911
ISSN:
0030-1299
Subject:
evolution; genetic relationships; insect colonies; kin selection; social behavior; social insects
Abstract:
... The kin selection theory has recently been criticised on the basis of claiming that genetic relatedness does not play a causal role in the social evolution among individuals of insect societies. We outline here a line of criticism of this view by demonstrating two things. First, there are strong conceptual, theoretical and empirical reasons to think that close genetic relatedness has been necessar ...
DOI:
10.1111/oik.05887

11. Species‐specific ontogenetic diet shifts attenuate trophic cascades and lengthen food chains in exploited ecosystems

Author:
Reum, Jonathan C. P.; Blanchard, Julia L.; Holsman, Kirstin K.; Aydin, Kerim; Punt, André E.
Source:
Oikos 2019 v.128 no.7 pp. 1051-1064
ISSN:
0030-1299
Subject:
databases; diet; ecosystems; food chain; models; mortality; ontogeny; piscivores; predation; predators; Bering Sea
Abstract:
... Ontogenetic diet shifts are pervasive in food websbut rules governing their emergence and the implications for trophic cascades are only partly understood. Recent theoretical advances in multispecies size spectrum models (MSSMs) predict that the emergence of ontogenetic diet shifts are driven primarily by size‐selective predation and changes in the relative abundances of suitably sized prey. Howev ...
DOI:
10.1111/oik.05630

12. Stressor fluxes alter the relationship between beta‐diversity and regional productivity

Author:
De Raedt, Jonathan; Baert, Jan M.; Janssen, Colin R.; De Laender, Frederik
Source:
Oikos 2019 v.128 no.7 pp. 1015-1026
ISSN:
0030-1299
Subject:
ecosystems; herbicides; microalgae; species diversity
Abstract:
... Dispersal of organisms can influence the relationship between beta‐diversity and regional productivity in heterogeneous environments. However, many ecosystems are also linked by fluxes of stressors, with an unknown influence on this relationship. In this study, we assess the relationship between beta‐diversity (measured as Bray–Curtis dissimilarity) and regional productivity (measured as biovolume ...
DOI:
10.1111/oik.05191

13. Urbanization drives unique latitudinal patterns of insect herbivory and tree condition

Author:
Just, Michael G.; Dale, Adam G.; Long, Lawrence C.; Frank, Steven D.
Source:
Oikos 2019 v.128 no.7 pp. 984-993
ISSN:
0030-1299
Subject:
Acer rubrum; cities; landscapes; latitude; phytophagous insects; prediction; scale insects; temperature profiles; tree health; trees; urban areas; urbanization; water stress; United States
Abstract:
... Urban landscapes are characterized by high proportions of impervious surface resulting in higher temperatures than adjacent natural landscapes. In some cities, like those at cooler latitudes, trees may benefit from warmer urban temperatures, but trees in many cities are beset with problems like drought stress and increased herbivory. What drives patterns of urban tree health across urbanization an ...
DOI:
10.1111/oik.05874