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32 results for “plant population dynamics”
Data from: A hyperparasite affects the population dynamics of a wild plant pathogen
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Data from: Intra- and interspecific density dependence mediates weather effects on the population dynamics of a plant-insect herbivore system
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Climate manipulations differentially affect plant population dynamics within versus beyond northern range limits
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Weather driven demography and population dynamics of an endemic perennial plant during a 34-year period
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Data from: Comparative impacts of long-term trends in snowmelt and species interactions on plant population dynamics
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Data from: Cyclic population dynamics and density-dependent intransitivity as pathways to coexistence between co-occurring annual plants
1. Recent studies have brought renewed attention to the importance of complex species interactions - notably intransitive interactions - to patterns of plant community diversity. One underappreciated avenue through which intransitivity can occur is through cyclic population dynamics. Though such cyclic intransitive relationships have been extensively studied in predator-prey systems, evidence of their importance in competitive communities, notably plant communities, is more limited. Most studies of coexistence in plant communities assume fixed-point coexistence even while utilizing models that allow for cyclic population dynamics. 2. In this paper, we explore the potential for density-dependent, cyclic population dynamics and intransitivity in a model for annual plants. We then examine how these density-dependent cycles impact mutual invasibility and ultimately stable coexistence between plant species pairs. We do this using data collected from four co-occurring annual plant species living in natural wildflower communities in SW Western Australia. To maximize the number of biologically plausible pathways by which coexistence mediated by density-dependent cyclic intransitivity can occur, we use an annual plant model that allows for competitive direct interactions, facilitative direct interactions, and higher-order interactions between species. 3. Results from our empirically-parameterized model suggest that monocultures of all four focal species can have cyclic solutions with periodicity greater than 1 under sunny ("open") or shaded field conditions. Cyclic patterns drive variation in annual abundance patterns, with stable solutions for persistent monocultures and invasibility potential (the capacity of one population to invade another) common. Mutual invasibility in the face of cyclic population dynamics was found for just one of six species pairs, only under open environmental conditions. Our results illustrate the potential for cyclic intransitivity to both drive and prevent stable coexistence in environmentally heterogeneous biological communities. 4. Synthesis. We provide analytical and empirical evidence that coexistence in competitive communities (annual plants) can be achieved under non-equilibrium circumstances, through density-dependent cyclic intransitivity. Our results suggest that cyclic population dynamics may be common and important for coexistence dynamics in some types of communities. In such communities, the exploration of stable coexistence should therefore include consideration of cyclic as well as fixed-point equilibria for maximal accuracy.
Data from: Phenotypic biomarkers of climatic impacts on declining insect populations: a key role for decadal drought, thermal buffering and amplification effects and host plant dynamics
1. Widespread population declines have been reported for diverse Mediterranean butterflies over the last three decades, and have been significantly associated to increased global change impacts. The specific landscape and climatic drivers of these declines remain uncertain for most declining species. 2. Here we analyse whether plastic phenotypic traits of a model butterfly species (Pieris napi) perform as reliable biomarkers of vulnerability to extreme temperature impacts in natural populations, showing contrasting trends in thermally exposed and thermally buffered populations. 3. We also examine whether improved descriptions of thermal exposure of insect populations can be achieved by combining multiple information sources (i.e. integrating measurements of habitat thermal buffering, habitat thermal amplification, host plant transpiration, and experimental assessments of thermal death time (TDT), thermal avoidance behaviour (TAB) and thermally induced trait plasticity). These integrative analyses are conducted in two demographically declining and two non-declining populations of P. napi. 4. The results show that plastic phenotypic traits (butterfly body mass and wing size) are reliable biomarkers of population vulnerability to extreme thermal conditions. Butterfly wing size is strongly reduced only in thermally exposed populations during summer drought periods. Lab rearing of these populations documented reduced wing size due to significant negative effects of increased temperatures affecting larval growth. We conclude that these thermal biomarkers are indicative of the population vulnerability to increasing global warming impacts, showing contrasting trends in thermally exposed and buffered populations. 5. Thermal effects in host plant microsites significantly differ between populations, with stressful thermal conditions only effectively ameliorated in mid-elevation populations. In lowland populations we observe a six-fold reduction in vegetation thermal buffering effects, and larval growth occurs in these populations at significantly higher temperatures. Lowland populations show reduced host plant quality (C/N ratio), reduced leaf transpiration rates and complete aboveground plant senescence during the peak of summer drought. Amplified host plant temperatures are observed in open microsites, reaching thermal thresholds that can affect larval survival. 6. Overall, our results suggest that butterfly population vulnerability to long-term drought periods is associated to multiple co-occurring and interrelated ecological factors, including limited vegetation thermal buffering effects at lowland sites, significant drought impacts on host plant transpiration and amplified leaf surface temperature, as well as reduced leaf quality linked to the seasonal advance of plant phenology. Our results also identify multi-annual summer droughts affecting larval growing periods as a key driver of the recently reported butterfly population declines in the Mediterranean biome.
Data for: Quantifying patch-specific seed dispersal and local population dynamics to estimate population spread of an endangered plant species
<p>Dataset on seed dispersal and population spread for the paper</p> <p class="Default"><span><b>Quantifying patch-specific seed dispersal and local population dynamics to estimate population spread of an endangered plant species</b></span></p> <p>Jinlei Zhu<sup>1, 2,</sup> *, Karolína Hrušková<sup>1, 3</sup>, Hana Pánková<sup>1</sup>, Zuzana Münzbergová<sup>1, 3</sup></p> <p><sup>1</sup>Institute of Botany, Czech Academy of Sciences, Průhonice, Czech Republic</p> <p class="Default"><span><sup>2</sup>Institute of Landscape and Plant Ecology, University of Hohenheim, Stuttgart, Germany</span></p> <p class="Default"><span><sup>3</sup>Department of Botany, Faculty of Science, Charles University, Prague, Czech Republic</span></p> <p class="Default"><span>*Corresponding author: jinlei.zhu@uni-hohenheim.de</span></p> <p>Institute of Landscape and Plant Ecology</p> <p>University of Hohenheim</p> <p>Ottilie-Zeller-Weg 2, 70599 Stuttgart, Germany</p>
Data from: The contrasting roles of host species diversity and parasite population genetic diversity in the infection dynamics of a keystone parasitic plant
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Data from: Cyclic population dynamics and density-dependent intransitivity as pathways to coexistence between co-occurring annual plants
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Data from: Phenotypic biomarkers of climatic impacts on declining insect populations: a key role for decadal drought, thermal buffering and amplification effects and host plant dynamics
Open the record for dataset details and reuse information.
Data for: Quantifying patch-specific seed dispersal and local population dynamics to estimate population spread of an endangered plant species
Open the record for dataset details and reuse information.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
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DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.