Results 21 to 30 of about 22,265,852 (345)
A new dynamic null model for phylogenetic community structure [PDF]
Ecol Lett, 2015 Phylogenies are increasingly applied to identify the mechanisms structuring ecological communities but progress has been hindered by a reliance on statistical null models that ignore the historical process of community assembly.
A. Pigot, R. Etienne
semanticscholar +2 more sources
Assessment of the stream invertebrate β‐diversity along an elevation gradient using a bidimensional null model analysis [PDF]
Ecology and Evolution, 2022 β‐Diversity, commonly defined as the compositional variation among localities that links local diversity (α‐diversity) and regional diversity (γ‐diversity), can arise from two different ecological phenomena, namely the spatial species turnover (i.e ...
Pablo Timoner +3 more
doaj +2 more sources
Was Lates Late? A Null Model for the Nile Perch Boom in Lake Victoria [PDF]
PLoS One, 2013 Nile perch (Lates niloticus) suddenly invaded Lake Victoria between 1979 and 1987, 25 years after its introduction in the Ugandan side of the lake. Nile perch then replaced the native fish diversity and irreversibly altered the ecosystem and its role to ...
A. Downing +6 more
semanticscholar +2 more sources
Random Graphs with Prescribed K-Core Sequences: A New Null Model for Network Analysis [PDF]
The Web Conference, 2021 In the analysis of large-scale network data, a fundamental operation is the comparison of observed phenomena to the predictions provided by null models: when we find an interesting structure in a family of real networks, it is important to ask whether ...
K. V. Koevering +2 more
semanticscholar +1 more source
Zero-Shot Image Restoration Using Denoising Diffusion Null-Space Model [PDF]
International Conference on Learning Representations, 2022 Most existing Image Restoration (IR) models are task-specific, which can not be generalized to different degradation operators. In this work, we propose the Denoising Diffusion Null-Space Model (DDNM), a novel zero-shot framework for arbitrary linear IR ...
Yinhuai Wang, Jiwen Yu, Jian Zhang
semanticscholar +1 more source
Frontiers in Microbiology, 2022 Revealing community assembly and their impacts on ecosystem service is a core issue in microbial ecology. However, what ecological factors play dominant roles in phyllosphere fungal community assembly and how they link to crop quality are largely unknown.
Lei Xing +9 more
doaj +1 more source
Ecology and Evolution, 2023 To explore the taxon‐dependent contribution of dispersal limitation versus environmental filters to bryophyte assemblages. We investigated bryophytes and six environmental variables on 168 islands in the Thousand Island Lake,China.
Dandan Li +10 more
doaj +1 more source
Hyper-Null Models and Their Applications
Entropy, 2023 Null models are crucial tools for investigating network topological structures. However, research on null models for higher-order networks is still relatively scarce. In this study, we introduce an innovative method to construct null models for hypergraphs, namely the hyperedge swapping-based method.
Yujie Zeng +3 more
openaire +3 more sources
WISDoM: Characterizing Neurological Time Series With the Wishart Distribution
Frontiers in Neuroinformatics, 2021 WISDoM (Wishart Distributed Matrices) is a framework for the quantification of deviation of symmetric positive-definite matrices associated with experimental samples, such as covariance or correlation matrices, from expected ones governed by the Wishart ...
Carlo Mengucci +4 more
doaj +1 more source
A graphical null model for scaling biodiversity–ecosystem functioning relationships
Journal of Ecology, 2020 Global biodiversity is declining at rates faster than at any other point in human history. Experimental manipulations at small spatial scales have demonstrated that communities with fewer species consistently produce less biomass than higher diversity ...
K. Barry +11 more
semanticscholar +1 more source