A5035808847- Ecology and Vegetation Dynamics Studies
- Plant and animal studies
- Species Distribution and Climate Change
- Botany and Plant Ecology Studies
- Plant Parasitism and Resistance
- Forest ecology and management
- Animal Ecology and Behavior Studies
- Plant Water Relations and Carbon Dynamics
- Botany, Ecology, and Taxonomy Studies
- Land Use and Ecosystem Services
- Genetic diversity and population structure
- Animal Behavior and Reproduction
- Wildlife Ecology and Conservation
- Remote Sensing in Agriculture
- Seedling growth and survival studies
- Genetics, Aging, and Longevity in Model Organisms
- Genetic and phenotypic traits in livestock
- Rangeland and Wildlife Management
- Bryophyte Studies and Records
- Geology and Paleoclimatology Research
- European and Russian Geopolitical Military Strategies
- Body Composition Measurement Techniques
- Ecosystem dynamics and resilience
- Military Strategy and Technology
- Globalization and Cultural Identity
University of Southern Denmark
2014-2025
Royal Botanic Garden Edinburgh
2024
Stockholm University
2005-2014
Summary Integral projection models ( IPM s) use information on how an individual's state influences its vital rates – survival, growth and reproduction to make population projections. s are constructed from regression predicting variables e.g . size or age) covariates environment). By combining regressions of rates, provides mechanistic insight into emergent ecological patterns such as dynamics, species geographic distributions life‐history strategies. Here, we review important resources for...
Biodiversity loss is a major challenge. Over the past century, average rate of vertebrate extinction has been about 100-fold higher than estimated background and population declines continue to increase globally. Birth death rates determine pace or decline, thus driving expansion species. Design species conservation policies hence depends on demographic data (e.g., for risk assessments estimation harvesting quotas). However, an overview accessible data, even better known taxa, lacking. Here,...
Abstract Population size is a main indicator of conservation potential, thought to predict both current and long‐term population viability. However, few studies have directly examined the links between genetic demographic properties populations, using metrics that integrate effects across whole life cycle. In this study, we combined 6 years data with SNP‐based estimates diversity from 18 Swedish populations orchid Gymnadenia conopsea . We assessed whether stochastic growth rate increases...
Summary The relationship between the performance of individuals and surrounding environment is fundamental in ecology evolutionary biology. Assessing how abiotic biotic environmental factors influence demographic processes necessary to understand predict population dynamics, as well species distributions abundances. We searched literature for studies that have linked vital rates and, using structured models, growth plants. found 136 had examined drivers plant demography. number has been...
Multiple, simultaneous environmental changes, in climatic/abiotic factors, interacting species, and direct human influences, are impacting natural populations thus biodiversity, ecosystem services, evolutionary trajectories. Determining whether the magnitudes of population impacts abiotic, biotic, anthropogenic drivers differ, accounting for their effects mediated through other drivers, would allow us to better predict fates design mitigation strategies. We compiled 644 paired values growth...
Summary 1. Understanding how vital rates and reproductive value change with age is fundamental to demography, life history evolution population genetics. The universality of organism senescence has been questioned on both theoretical empirical grounds, the prevalence strength remain a controversial issue. Plants are particularly interesting for studies since individuals many species have reported reach very high ages. 2. In this study, we examined whether herb Borderea pyrenaica , known ages...
1. To predict the viability of populations, it is essential to clarify how performance depends both on large-scale environmental changes, such as climate warming, and local habitat. However, in spite their potential importance, effects interactions between changes environment population have rarely been examined. 2. We investigated dynamics endangered alpine plant Dracocephalum austriacum depend habitat quality climatic variation, well used lasso regression shrinkage integral projection...
Timing of seasonal plant development can affect biotic interactions and fitness. Phenology is governed largely by temperature may therefore be affected global climate warming, making this an important area research. Several factors in addition to cause differences phenology. We studied the influence local environment, size, reproductive effort on shoot emergence flowering time 290 individuals Actaea spicata (Ranunculaceae), distributed among 25 plots four populations. used multiple...
1 Although necessary for understanding and predicting population dynamics, abiotic biotic interactions have only rarely been coupled to demography dynamics. 2 We estimated effects of 11 environmental factors on survival, growth fertility the perennial herb Actaea spicata incorporated significant into integral projection models assess their effect 3 Statistical suggested that high soil potassium concentration increased individual seed predation and, a lesser extent, canopy cover reduced...
Abstract Whole‐plant senescence, defined as a decrease in individual fitness an organism grows older, has often been assumed to not occur plants; however, it now detected range of plant taxa. Still, reported senescence patterns vary substantially, and remains unknown how consistent are within phylogenetic groups they may be affected by environmental factors. Plants show high diversity life‐history traits environments, but shared among related species also common, making both diverse similar...
Climate change is expected to influence the viability of populations both directly and indirectly, via species interactions. The effects large-scale climate are also likely interact with local habitat conditions. Management actions designed preserve threatened therefore need adapt prevailing Yet, few studies have separated direct indirect climatic variables on discussed implications for optimal management. We used 30 years demographic data estimate simultaneous management practice among-year...
Despite seemingly obvious effects of environmental drivers, mechanisms behind long‐term changes in plant population sizes over time are often poorly known. We investigated how soil potassium concentration and seed predation likely to change as a result succession from deciduous forest spruce forest, this affects trajectories Actaea spicata . Observations addition experiments showed that high increased individual growth rates. Among‐site comparisons was lower where proportion higher....
Summary Plant population dynamics research has a long history, and data collection rates have increased through time. The inclusion of this information in databases enables researchers to investigate the drivers demographic patterns globally study life history evolution. Studies aiming generalise rely on being derived from representative sample populations. However, are likely be biased, both terms species ecoregions investigated how original studies were conducted. Matrix models (MPMs)...
Abstract Question : How accurately can a suite of suggested functional traits predict plant species response to succession from semi‐open woodland closed deciduous canopy forest? Location Southeastern Sweden. Methods Abundance 46 field‐layer in temperate forest, measured as frequency occupied plots, was estimated 1961, 1970 and 2003. change over time across tested for correlations with literature information on habitat preference. Results Increase abundance positively correlated specific...
To accurately estimate population dynamics and viability, structured models account for among-individual differences in demographic parameters that are related to individual state. In the widely used matrix models, such incorporated terms of discrete state categories, whereas integral projection (IPMs) use continuous variables avoid artificial classes. IPMs, sometimes also parameterization is based on regressions do not always model nonlinear relationships between variables. We stress...
Murtaugh (2009) recently illustrated that all subsets variable selection is very similar to stepwise regression. This, however, does not necessarily mean both methods are useful. On the contrary, same problems with overfitting should apply. Ecologists should, if model building indeed necessary, consider more reliable regression now available.
We investigated the relative importance of metapopulation processes versus environmental conditions for distribution freshwater plants in 51 adjacent lakes southern Sweden. Each lake was surveyed by snorkeling a zigzag pattern over littoral zone, and all aquatic vascular as well water colour, Sphagnum ‐dominated shore, bottom substrate, zone width Secchi‐depth were recorded. Data on area altitude taken from topographical maps. Multiple generalized linear regressions used to test significance...
Polyploidization is an important mechanism for sympatric speciation in plants. Still, we know little about whether plant polyploidization leads to insect host shifts, and if novel interactions influence habitat trait selection We investigated herbivory by the flower bud gall-forming midge Dasineura cardaminis on tetraploids octoploids of herb Cardamine pratensis. Gall midges attacked only octoploid populations, a transplantation experiment confirmed this preference. Attack rates were higher...
Negative effects of habitat fragmentation on individual performance have been widely documented, but relatively little is known about how simultaneous multiple vital rates translate into population viability in long‐lived species. In this study, we examined relationships between size, growth, survival and reproduction, growth rate the perennial plant Phyteuma spicatum . Population size positively affected seedlings, juveniles, proportion adults flowering, potential seed production. Analyses...
The dominant evolutionary theory of actuarial senescence—an increase in death rate with advancing age—is based on the concept a germ cell line that is separated from somatic cells early life. However, such separation not clear all organisms. This has been suggested to explain paucity evidence for senescence plants. We used 32 year study Dactylorhiza lapponica replaces its organs each growing season, test whether individuals this tuberous orchid senesce. performed Bayesian survival trajectory...
Identifying the internal and external drivers of population dynamics is a key objective in ecology, currently accentuated by need to forecast effects climate change on species distributions abundances. The interplay between environmental density one particularly important aspect such forecasts. We examined simultaneous impact intraspecific vital rates dwarf shrub Fumana procumbens over 20 yr, using generalized additive mixed models. then analyzed integral projection models accurately...
Optimal timing of reproduction within a season may be influenced by several abiotic and biotic factors. These factors sometimes affect different components fitness, making assessments net selection difficult. We used estimates offspring fitness to examine how pre-dispersal seed predation influences on flowering schedule in an herb with bimodal pattern, Actaea spicata. Within individuals, seeds from flowers early terminal inflorescences had higher germination rate produced larger seedlings...