Menü
Deutsch | English

Neue wissenschaftliche Aufsätze


Ecological Modelling

International Journal on Ecological Modelling and Systems Ecology
ScienceDirect Publication: Ecological Modelling
ScienceDirect RSS
Tolerance-fecundity trade-off on a homogeneous habitat
###RSS_DATE###
Publication date: 1 November 2019Source: Ecological Modelling, Volume 411Author(s): Michel Droz, Andrzej PękalskiAbstractPossibility of a coexistence of different species is one of the important issues in ecology. Various mechanism and methods have been proposed to describe biodiversity. In this paper we present and discuss a new model describing the tolerance-fecundity trade-off on a homogeneous habitat, as a mechanisms for sustaining biodiversity. The model is investigated using two techniques – difference equations operating on globally defined functions and computer simulations...
Individual variation and ecotypic niches in simulations of the impact of climatic volatility
###RSS_DATE###
Publication date: 1 November 2019Source: Ecological Modelling, Volume 411Author(s): George P. Malanson, R. Justin DeRose, Matthew F. BekkerAbstractExpectations of the impacts of climatic variation on species can depend on whether and how intraspecific variability is incorporated in models. Coefficients of variation from tree-ring records of Pinus albicaulis through time and across space were used to parameterize volatility and individuality, respectively. The records across sites were used to differentiate the average modes on an environmental gradient for Gaussian fitness of ecotypic...
Conditions for growth and extinction in matrix models with environmental stochasticity
###RSS_DATE###
Publication date: 1 November 2019Source: Ecological Modelling, Volume 411Author(s): Luis SanzAbstractIn this kind of model, the main characteristic that determines population viability in the long term is the stochastic growth rate (SGR) denoted λS. When λS is larger than one, the population grows exponentially with probability one and when it is smaller than one, the population goes extinct with probability one. However, even in very simple situations it is not possible to calculate the SGR analytically. The literature offers some approximations for the case in which environmental...
Evaluating model results in scatter plots: A critique
###RSS_DATE###
Publication date: 1 November 2019Source: Ecological Modelling, Volume 411Author(s): Valentijn R.N. Pauwels, Adrien Guyot, Jeffrey P. Walker
Future distribution of wild boar in a highly anthropogenic landscape: Models combining hunting bag and citizen science data
###RSS_DATE###
Publication date: 1 November 2019Source: Ecological Modelling, Volume 411Author(s): Anneleen Rutten, Jim Casaer, Kristijn R.R. Swinnen, Marc Herremans, Herwig LeirsAbstractWild boar is one of the most widespread mammals of the world and in many regions wild boar populations continue to expand. Especially in highly anthropogenic landscapes, increasing numbers of wild boar lead to a rising number of contacts with human activities causing human-wildlife impacts. In the heavily fragmented landscape of Flanders (northern Belgium) where the wild boar re-appeared in 2006 after more than half a...
Importance of spatial predictor variable selection in machine learning applications – Moving from data reproduction to spatial prediction
###RSS_DATE###
Publication date: 1 November 2019Source: Ecological Modelling, Volume 411Author(s): Hanna Meyer, Christoph Reudenbach, Stephan Wöllauer, Thomas NaussAbstractMachine learning algorithms find frequent application in spatial prediction of biotic and abiotic environmental variables. However, the characteristics of spatial data, especially spatial autocorrelation, are widely ignored. We hypothesize that this is problematic and results in models that can reproduce training data but are unable to make spatial predictions beyond the locations of the training samples. We assume that not only...
Scale effects on the performance of niche-based models of freshwater fish distributions: Local vs. upstream area influences
###RSS_DATE###
Publication date: 1 November 2019Source: Ecological Modelling, Volume 411Author(s): Danijela Markovic, Ariane Walz, Oskar KärcherAbstractNiche-based species distribution models (SDMs) play a central role in studying species response to environmental change. Effective management and conservation plans for freshwater ecosystems require SDMs that accommodate hierarchical catchment ordering and provide clarity on the performance of such models across multiple scales. The scale-dependence components considered here are: (a) environment spatial structure, represented by hierarchical catchment...
Optimizing functional groups in ecosystem models: Case study of the Great Barrier Reef
###RSS_DATE###
Publication date: 1 November 2019Source: Ecological Modelling, Volume 411Author(s): Vanessa Haller-Bull, Elena RovenskayaAbstractUncertainty is inherent in ecosystem modelling, however its effects on modelling results are often poorly understood or ignored. This study addresses the issue of structural uncertainty or, more specifically, model resolution and its impact on the analysis of ecosystem vulnerability to threats. While guidelines for node assignments exist, they are not always underlined with quantitative analysis. Different resolutions of a coral reef network are investigated by...
Order of events: Optimal harvest fraction in a discrete time model of a spatially structured single population protected by a marine reserve can be overestimated due to an imprecise modelling of...
###RSS_DATE###
Publication date: 1 November 2019Source: Ecological Modelling, Volume 411Author(s): Michel Iskin da Silveira Costa, Lucas dos AnjosAbstractThe order of events in discrete time models plays an important role in the determination of the dynamics. For instance, harvest of a renewable resource can occur before or after species reproduction. In this work, we argue that a discrete time two–patch dynamical model of a single population proposed in the literature is partly incorrect with respect to harvest timing. We put forward a new formulation where pre and post-reproductive harvest are...
Sensitivity analysis of tree phenology models reveals increasing sensitivity of their predictions to winter chilling temperature and photoperiod with warming climate
###RSS_DATE###
Publication date: 1 November 2019Source: Ecological Modelling, Volume 411Author(s): Julie Gauzere, Camille Lucas, Ophélie Ronce, Hendrik Davi, Isabelle ChuineAbstractThe phenology of plants is a major driver of agro-ecosystem processes and biosphere feedbacks to the climate system. Phenology models are classically used in ecology and agronomy to project future phenological changes. With our increasing understanding of the environmental cues affecting bud development, phenology models also increase in complexity. But, we expect these cues, and the underlying physiological processes, to...
INSTAR: An Agent-Based Model that integrates existing knowledge to simulate the population dynamics of a forest pest
###RSS_DATE###
Publication date: 1 November 2019Source: Ecological Modelling, Volume 411Author(s): María Suárez-Muñoz, Francisco Bonet-García, José A. Hódar, Javier Herrero, Mihai Tanase, Lucía Torres-MurosAbstractPine plantations, very common in the Mediterranean basin, are recurrently affected by forest pests due to intrinsic characteristics (high density, low spatial heterogeneity) and external factors (consistent trend towards a warmer and drier climate). INSTAR is an Agent-Based Model aiming to simulate the population dynamics of the Thaumetopoea pityocampa forest pest. The model has been...
How to make ecological models useful for environmental management
###RSS_DATE###
Publication date: 1 November 2019Source: Ecological Modelling, Volume 411Author(s): Nele Schuwirth, Florian Borgwardt, Sami Domisch, Martin Friedrichs, Mira Kattwinkel, David Kneis, Mathias Kuemmerlen, Simone D. Langhans, Javier Martínez-López, Peter VermeirenAbstractUnderstanding and predicting the ecological consequences of different management alternatives is becoming increasingly important to support environmental management decisions. Ecological models could contribute to such predictions, but in the past this was often not the case. Ecological models are often developed within...
Does averaging overestimate or underestimate population growth? It depends
###RSS_DATE###
Publication date: 1 November 2019Source: Ecological Modelling, Volume 411Author(s): Dmitrii O. LogofetAbstractWhen a matrix population model is nonautonomous, i.e., when it represents a set of single-time-step ("annual") PPMs, L(t), t = 0, 1, …, T – 1, each corresponding to a fixed life cycle graph, then each of the annual matrices generates its own set of model results to characterize the population. In particular, λ1(t), the asymptotic growth rate, varies with t and may result in alternating predictions of population viability. A logical way to characterize the population over the...
A new growth curve model for giant freshwater prawn Macrobrachium rosenbergii in a prawn–plant symbiotic system
###RSS_DATE###
Publication date: 1 November 2019Source: Ecological Modelling, Volume 411Author(s): Tao Chen, Min Lv, Yigui Wu, Jinzhao He, Guanghua Huang, Dapeng Wang, Huawei MaAbstractThe size and relative growth rates of prawns vary in different culture environments. We subject the highly productive and commercially valuable giant freshwater prawn Macrobrachium rosenbergii to a prawn–plant (M. rosenbergii–Hydrilla verticillata) symbiotic culture environment in which water-quality and habitat are adequate. Through introduction of an additional parameter to the Gompertz function, we develop an...
Quantifying the effectiveness of agri-environment schemes for a grassland butterfly using individual-based models
###RSS_DATE###
Publication date: 1 November 2019Source: Ecological Modelling, Volume 411Author(s): Luke C. Evans, Richard M. Sibly, Pernille Thorbek, Ian Sims, Tom H. Oliver, Richard J. WaltersAbstractThe intensification of agricultural practices throughout the twentieth century has had large detrimental effects on biodiversity and these are likely to increase as the human population rises, with consequent pressure on land. To offset these negative impacts, agri-environment schemes have been widely implemented, offering financial incentives for land-owners to create or maintain favourable habitats that...
Species distribution modelling to support forest management. A literature review
###RSS_DATE###
Publication date: 1 November 2019Source: Ecological Modelling, Volume 411Author(s): Matteo Pecchi, Maurizio Marchi, Vanessa Burton, Francesca Giannetti, Marco Moriondo, Iacopo Bernetti, Marco Bindi, Gherardo ChiriciAbstractSpecies Distribution Modelling (SDM) techniques were originally developed in the mid-1980s. In this century they are gaining increasing attention in the literature and in practical use as a powerful tool to support forest management strategies especially under climate change. In this review paper we consider species occurrence datasets, climatic and soil predictor...
Research progress on ecological models in the field of water eutrophication: CiteSpace analysis based on data from the ISI web of science database
###RSS_DATE###
Publication date: 15 October 2019Source: Ecological Modelling, Volume 410Author(s): Wen Hu, Chun-hua Li, Chun Ye, Ji Wang, Wei-wei Wei, Yong DengAbstractEco-models have shown great potential in the field of water eutrophication research. We use the information visualization technology of CiteSpace to present a systematic review of published literature on the application of eco-models to eutrophication from 1968-2018. In total, 2099 references from the Web of Science (WoS) Core Collection were analyzed using the CiteSpace software, bibliometric methods, and documents combing methods to...
Emergence of negative trophic level-size relationships from a size-based, individual-based multispecies fish model
###RSS_DATE###
Publication date: 15 October 2019Source: Ecological Modelling, Volume 410Author(s): Morgane Travers-Trolet, Franck Coppin, Pierre Cresson, Philippe Cugier, Ricardo Oliveros-Ramos, Philippe VerleyAbstractModeling the mechanisms underlying trophic interactions between individuals allows the food web structure to emerge from local interactions, which constitutes a prerequisite for assessing how marine ecosystems respond to various anthropogenic pressures. Using a multispecies spatially explicit individual-based model, the emergence of trophic patterns was explored in the eastern English...
Development and implementation of an empirical habitat change model and decision support tool for estuarine ecosystems
###RSS_DATE###
Publication date: 15 October 2019Source: Ecological Modelling, Volume 410Author(s): Melanie J. Davis, Isa Woo, Susan E.W. De La CruzAbstractWidespread land use change in coastal ecosystems has led to a decline in the amount of habitat available for fish and wildlife, lower production of ecosystem goods and services, and loss of recreational and aesthetic value. This has prompted global efforts to restore the natural hydrologic regimes of developed shorelines, especially resource-rich estuaries, but the resilience of these restored ecosystems in the face of accelerated sea-level rise (SLR...
Understanding Urban Ecology: An Interdisciplinary Systems Approach, Myrna H.P. Hall, Stephen B. Balogh (Eds.). Springer International Publishing (2019)
###RSS_DATE###
Publication date: 15 October 2019Source: Ecological Modelling, Volume 410Author(s): Vanessa P. Weinberger