Johan Ehrlén
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View article: Several candidate size metrics explain vital rates across multiple populations throughout a widespread species' range
Several candidate size metrics explain vital rates across multiple populations throughout a widespread species' range Open
Individual plant size often determines the vital rates of growth, survival and reproduction. However, size can be measured in several ways (e.g. height, biomass, leaf length). There is no consensus on the best size metric for modelling vit…
View article: Positive indirect effects outweigh negative direct effects of ungulate grazers on population growth of a grassland herb
Positive indirect effects outweigh negative direct effects of ungulate grazers on population growth of a grassland herb Open
Herbivores can affect plant population growth both directly through the damage they inflict to a focal species, and indirectly by moderating conditions for plant recruitment, nutrient cycling, competition and other biotic interactions, for…
View article: Quantitative assessment of past variations in <i>Sphagnum</i> bog community structure using paleo‐species distribution modeling
Quantitative assessment of past variations in <i>Sphagnum</i> bog community structure using paleo‐species distribution modeling Open
A common approach to investigating species' niches is to examine relationships between spatial variation in environmental conditions and contemporary species occurrences, using species distribution models (SDM or niche models). The relatio…
View article: Small-scale genetic differentiation in mean flowering time, but not in plasticity, along a geothermal heating gradient
Small-scale genetic differentiation in mean flowering time, but not in plasticity, along a geothermal heating gradient Open
Genetic differentiation in traits is assumed to frequently occur in response to divergent natural selection. For example, developmental traits might respond to differences in climate. However, little is known about when and at which spatia…
View article: Climatic versus biotic drivers' effect on fitness varies with range size but not position within range in terrestrial plants
Climatic versus biotic drivers' effect on fitness varies with range size but not position within range in terrestrial plants Open
All populations are affected by multiple environmental drivers, including climatic drivers such as temperature or precipitation and biotic drivers such as herbivory or mutualisms. The relative response of a population to each driver is cri…
View article: Competitive interactions modify the direct effects of climate
Competitive interactions modify the direct effects of climate Open
As the climate is changing, species respond by changing their distributions and abundances. The effects of climate are not only direct, but also occur via changes in biotic interactions, such as competition. Yet, the role of competition in…
View article: Flower position within plants influences reproductive success both directly and via phenology
Flower position within plants influences reproductive success both directly and via phenology Open
Premise In plants, within‐individual trait variation might result from mechanisms related to ontogenetic contingency, i.e., to the position of a particular structure within the plant, previous developmental events, and/or the developmental…
View article: Selection favours high spread and asymmetry of flower opening dates within plant individuals
Selection favours high spread and asymmetry of flower opening dates within plant individuals Open
Natural selection on traits expressed repeatedly by individuals is usually investigated with a focus on mean values, although within‐individual trait distributions often differ also in other aspects, such as their spread and shape. In plan…
View article: Canopy cover and soil moisture influence forest understory plant responses to experimental summer drought
Canopy cover and soil moisture influence forest understory plant responses to experimental summer drought Open
Extreme droughts are globally increasing in frequency and severity. Most research on drought in forests focuses on the response of trees, while less is known about the impacts of drought on forest understory species and how these effects a…
View article: How to shorten scientific manuscripts
How to shorten scientific manuscripts Open
Many journals have strict word limits, and authors therefore spend considerable time shortening manuscripts. Here, we provide pointers for efficiently doing so while retaining key content. We include general guidance, tips for condensing t…
View article: data for: Climatic vs. biotic drivers effect on fitness varies with range size but not position within range in terrestrial plants
data for: Climatic vs. biotic drivers effect on fitness varies with range size but not position within range in terrestrial plants Open
full citation for this manuscript is: Allison M. Louthan, Aaron W. Baumgardner, Johan Ehrlén, Johan P. Dahlgren, Alexander K. Loomis, William F. Morris. Climatic vs. biotic drivers effect on fitness varies with range size but not position …
View article: High‐resolution data are necessary to understand the effects of climate on plant population dynamics of a forest herb
High‐resolution data are necessary to understand the effects of climate on plant population dynamics of a forest herb Open
Climate is assumed to strongly influence species distribution and abundance. Although the performance of many organisms is influenced by the climate in their immediate proximity, the climate data used to model their distributions often hav…
View article: Spring temperature drives phenotypic selection on plasticity of flowering time
Spring temperature drives phenotypic selection on plasticity of flowering time Open
In seasonal environments, a high responsiveness of development to increasing temperatures in spring can infer benefits in terms of a longer growing season, but also costs in terms of an increased risk of facing unfavourable weather conditi…
View article: Reproductive success, fruit removal and local distribution patterns in the early‐flowering shrub <i>Daphne mezereum</i>
Reproductive success, fruit removal and local distribution patterns in the early‐flowering shrub <i>Daphne mezereum</i> Open
In insect‐pollinated, bird‐dispersed plants, both investment in reproduction and reproductive success involve interactions between plants and their pollinators and dispersers. The outcome of these plant–animal interactions may be affected …
View article: It Pays Off to Flower Early, But Not Too Early When the Soil Gets Warmer
It Pays Off to Flower Early, But Not Too Early When the Soil Gets Warmer Open
Photo 1. Our study site was located in the Hengill geothermal area, located 40 km east of Reykjavik, Iceland, (64°03′N; 21°18′W, ~360 m.a.s.l.), at the base of the Hengill volcanic system. The study area, comprising ~1 km2, includes the Fr…
View article: Effects of past and present microclimates on northern and southern plant species in a managed forest landscape
Effects of past and present microclimates on northern and southern plant species in a managed forest landscape Open
Questions Near‐ground temperatures can vary substantially over relatively short distances, enabling species with different temperature preferences and geographical distributions to co‐exist within a small area. In a forest landscape, the n…
View article: Maladaptive plastic responses of flowering time to geothermal heating
Maladaptive plastic responses of flowering time to geothermal heating Open
Phenotypic plasticity might increase fitness if the conditions under which it evolved remain unaltered, but becomes maladaptive if the environment no longer provides reliable cues for subsequent conditions. In seasonal environments, timing…
View article: Widespread latitudinal asymmetry in the performance of marginal populations: A meta‐analysis
Widespread latitudinal asymmetry in the performance of marginal populations: A meta‐analysis Open
Aim Range shifts are expected to occur when populations at one range margin perform better than those at the other margin, yet no global trend in population performances at range margins has been demonstrated empirically across a wide rang…
View article: Spring temperature drives phenotypic selection on plasticity of flowering time
Spring temperature drives phenotypic selection on plasticity of flowering time Open
Data on field observations of flowering time and fitness of the perennial forest herb Lathyrus vernus and on spring temperature from weather station data. The dataset includes 22 years of data (1987–1996 and 2006–2017) from a L. vernus pop…
View article: Spring temperature drives phenotypic selection on plasticity of flowering time
Spring temperature drives phenotypic selection on plasticity of flowering time Open
Data on field observations of flowering time and fitness of the perennial forest herb Lathyrus vernus and on spring temperature from weather station data. The dataset includes 22 years of data (1987–1996 and 2006–2017) from a L. vernus pop…
View article: Forest edge effects on moss growth are amplified by drought
Forest edge effects on moss growth are amplified by drought Open
Forest fragmentation increases the amount of edges in the landscape. Differences in wind, radiation, and vegetation structure create edge‐to‐interior gradients in forest microclimate, and these gradients are likely to be more pronounced du…
View article: Life-history characteristics and historical factors are important to explain regional variation in reproductive traits and genetic diversity in perennial mosses
Life-history characteristics and historical factors are important to explain regional variation in reproductive traits and genetic diversity in perennial mosses Open
Background and Aims Plants have evolved an unrivalled diversity of reproductive strategies, including variation in the degree of sexual vs. clonal reproduction. This variation has important effects on the dynamics and genetic structure of …
View article: Data for: "High-resolution data are necessary to understand the effects of climate on plant population dynamics of a forest herb"
Data for: "High-resolution data are necessary to understand the effects of climate on plant population dynamics of a forest herb" Open
Compiled data and code used for analyses in "High-resolution data are necessary to understand the effects of climate on plant population dynamics of a forest herb".Compiled file consists of the scaled dataset used for analyses "data_lathyr…
View article: Soil microbiomes drive aboveground plant–pathogen–insect interactions
Soil microbiomes drive aboveground plant–pathogen–insect interactions Open
Plants interact with a large diversity of microbes and insects, both below and above ground. While studies have shown that belowground microbes affect the performance of plants and aboveground organisms, we lack insights into how belowgrou…
View article: Selection against early flowering in geothermally heated soils is associated with pollen but not prey availability in a carnivorous plant
Selection against early flowering in geothermally heated soils is associated with pollen but not prey availability in a carnivorous plant Open
Premise In high‐latitude environments, plastic responses of phenology to increasing spring temperatures allow plants to extend growing seasons while avoiding late frosts. However, evolved plasticity might become maladaptive if climatic con…
View article: Single, but not dual, attack by a biotrophic pathogen and a sap-sucking insect affects the oak leaf metabolome
Single, but not dual, attack by a biotrophic pathogen and a sap-sucking insect affects the oak leaf metabolome Open
Plants interact with a multitude of microorganisms and insects, both below- and above ground, which might influence plant metabolism. Despite this, we lack knowledge of the impact of natural soil communities and multiple aboveground attack…
View article: Microclimate influences plant reproductive performance via an antagonistic interaction
Microclimate influences plant reproductive performance via an antagonistic interaction Open
Climatic conditions can influence plant reproduction directly, but also via changes in plant traits, interactions with animals, and the surrounding environment. Such indirect effects can often be complex and involve multiple steps includin…
View article: Positive indirect effects more than balance negative direct effects of ungulate grazers on population growth of a grassland herb
Positive indirect effects more than balance negative direct effects of ungulate grazers on population growth of a grassland herb Open
Herbivores can affect plant population dynamics both directly because of the damage they inflict, and indirectly by moderating conditions for plant recruitment, competition and other biotic interactions. Still, the relative importance of i…