On piecewise models and species–area patterns

Author: lqje

August undefined, 2024

WebNational Center for Biotechnology Information WebTrophic niches condition the energetic performance of species within food webs providing a vital link between food web assembly, species diversity, and functioning of ecosystems. Our understanding of this important link is, however, limited by the lack of empirical tools that can be easily applied to compare entire food webs at regional scales. By comparison, with …

Herbarium records reveal multiple phases in the relationship …

WebThe ‘sars’ (species–area relationships) package has been programmed using standard S3 methods and is available on CRAN (version 1.2.1) and the development version on GitHub (txm676/sars), meaning researchers can easily add in their own models and functions and integrate these into the multi-model inference framework. Web8 de out. de 2024 · Several models have been proposed, addressing the issue, and they can be reconducted to three main hypotheses developed to explain the species-area relationship: (1) the area-per se hypothesis (known also as the extinction-colonisation equilibrium), (2) the random placement (passive sampling), and the (3) environmental … ontcexu

Explaining Variation in Island Species–Area Relationship (ISAR) …

WebWhen properly used, species-area patterns can describe a variety of processes across many scales of time and space (Rosenzweig, 1995). ... diversity conforms to the predictions of the species-area model using a realistic inter-provincial z-value. The molluscan subgenera data in Table 1 have a homogenization ratio, H, of 310/378 = 82%. WebThe island species–area relationship (ISAR) is a fundamental di-versity pattern, best described by the power model. Biogeographic theory assumes predictable variation in power model parameters in relation principally to system isolation, but these assumptions are only weakly supported by pr evious work, which has been Web11 de abr. de 2024 · We used structural equation models (Piecewise SEM) ... The percentage of forest cover area ranged from 3.2 to 100 among sites and buffer ... Further data on the biology of multiple bat fly species are critical to shed light on the mechanisms behind different patterns of bat fly and bat species interactions in the Serra da Bodoquena. ion-input number min max

Climate change, species–area curves and the extinction crisis

On piecewise models and species-area patterns - PubMed

WebAbstract. Aim: Area thresholds, at which the form of the species–area relationship (SAR) changes abruptly, have played an important role in the theoretical framework of … WebMentioning: 24 - Aim Area thresholds, at which the form of the species–area relationship (SAR) changes abruptly, have played an important role in the theoretical framework of … ont ca weatherWebOn piecewise models and species-area patterns (Q92407250) From Wikidata. Jump to navigation Jump to search. scientific article published on 02 July 2024. edit. Language Label Description Also known as; English: On piecewise models and species-area patterns. ion input box

"Web1 de fev. de 2012 · Over most scales of space, ISARs are best represented by the power model and other simple models, while more complex, sigmoid models may be … " - On piecewise models and species–area patterns

On piecewise models and species–area patterns

11 - The Species–Area Relationships of Ecological Neutral Theory

WebTable 1. Model summary table, generated using the ‘summary.sars’ generic function. The table provides information about the fit of six piecewise models, in addition to linear and intercept-only models. See the legend of Fig.2 for dataset information. “Zslope” models are the left-horizontal models, “Cont” are the continuous models, and “Disc” are the … WebFive regression models coding PM 2.5 as a categorical variable were fitted to explore the dose–response relationships between PM 2.5 level and blood-feeding rate: a linear relationship for model 1, a 2-segment piecewise linear relationship for model 2, a 3-segment piecewise linear relationship for model 3, an exponential decay relationship for …

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WebTo this end, we provide a set of functions for fitting six piecewise regression models to SAR data, calculating confidence intervals around the breakpoint estimates (for certain models), comparing the models using various information criteria, and … WebTo evaluate body growth patterns, regression models were used in which the morphometric variables (dependent), except BDA, were plotted in relation to SL and HL (independent variables). These relationships were described by different growth models, which may indicate relevant biological processes linked to early ontogeny ( Kováč et al ., …

Web11 de mar. de 2024 · The Species–Area Relationship - March 2024. Skip to main content Accessibility help We use cookies to distinguish you from other users and to provide you with a better experience on our websites. ... He, F. & Legendre, P. (2002) Species diversity patterns derived from species–area models. Web2 de jul. de 2024 · Most recent studies have focused on one-threshold piecewise models with two segments, but the number of thresholds in …

WebOn piecewise models and species–area patterns Article Full-text available Jul 2024 De Gao Zhen Cao Peng Xu Gad Perry Aim: Area thresholds, at which the form of the species-area relationship... Web1 de jan. de 2024 · We fitted two piecewise models (the continuous and lefthorizontal one-threshold models) using new functionality in the "sars" R package (Matthews & Rigal, 2024). Both models have two...

WebBased on 78 grassland fragments in fragmented landscapes of the agro-pastoral ecotone of northern China, we used piecewise regression, path analysis and null models to investigate the SIE of the species–area relationship. We then used a multi-model selection to evaluate the impacts of four influencing factors (instability, isolation, habitat ...

Web7 de jan. de 2024 · The species-area relationship is one of the oldest known and most documented patterns in ecology. It describes the general pattern of increase in species richness with increasing area of observation, but it can take on different forms and be explained by various mechanisms. ion input maxlengthWeb9 de set. de 2024 · In early stages of invasions, alien species can face multiple sources of resistance that may impede the spread of their populations, such as the Allee effect (due to small population size or low genetic diversity) and unsuitable new habitats (Crooks, 2005; Leung et al., 2004).At this phase, alien species tend to have relatively slow spreading … ion-input fileWeb10 de abr. de 2024 · The piecewise regression (PWR) model detected two main clusters and indicated that increased temperatures trigger disease progression rapidly and severely. The PWR model used in this study also provided an example that can be used in the management and prediction of fungal diseases. ont child support calculatorWeb2 de jul. de 2024 · Abstract Aim Area thresholds, at which the form of the species–area relationship (SAR) changes abruptly, ... On piecewise models and species–area patterns. ion in middletown ctWeb8 de out. de 2024 · Area and environmental heterogeneity influence species richness in islands. Whether area or environmental heterogeneity is more relevant in determining … ont chill well shop ont chzWeb22 de mar. de 2024 · Tab. 3: Parameter estimates from regression models from the piecewise structural equation modeling (PSEM) and Bayesian network (BN) workflows Note that the PSEM used variables in normalized scale while the BN workflow used variables in original scale (raw data), which resulted in coefficients of different … ont charge