A5077344547- Ecology and Vegetation Dynamics Studies
- Plant and animal studies
- Species Distribution and Climate Change
- Complex Systems and Decision Making
- Animal Ecology and Behavior Studies
- Wildlife Ecology and Conservation
- Forest Ecology and Biodiversity Studies
- Botany and Plant Ecology Studies
- Information Systems Theories and Implementation
- Insect and Arachnid Ecology and Behavior
- Plant Parasitism and Resistance
- Pancreatic function and diabetes
- Lepidoptera: Biology and Taxonomy
- Genetic diversity and population structure
- Metabolism, Diabetes, and Cancer
- Physiological and biochemical adaptations
- Diabetes Treatment and Management
- Forest Insect Ecology and Management
- Isotope Analysis in Ecology
- Cognitive Science and Mapping
- Coastal wetland ecosystem dynamics
- Collembola Taxonomy and Ecology Studies
- Advanced Drug Delivery Systems
- Diabetes Management and Research
- Insect and Pesticide Research
Nicolaus Copernicus University
2016-2025
University of Salzburg
2024
Senckenberg German Entomological Institute
2024
Indian Institute of Science Education and Research, Tirupati
2023
University of Debrecen
2023
Sanofi (Germany)
2010-2022
University of Fribourg
2003-2021
The Open University
2005-2020
Sanofi (France)
2011-2020
John Wiley & Sons (United States)
2018
Nestedness has been widely reported for both metacommunities and networks of interacting species. Even though the concept this ecological pattern well‐defined, there are several metrics by which it can be quantified. We noted that current do not correctly quantify two major properties nestedness: (1) whether marginal totals (i.e. fills) differ among columns and/or rows, (2) presences (1's) in less‐filled rows coincide, respectively, with those found more‐filled rows. propose a new metric...
Soil bacteria and fungi play key roles in the functioning of terrestrial ecosystems, yet our understanding their responses to climate change lags significantly behind that other organisms. This gap is particularly true for drylands, which occupy ∼41% Earth´s surface, because no global, systematic assessments joint diversity soil have been conducted these environments date. Here we present results from a study across 80 dryland sites all continents, except Antarctica, assess how changes...
Nestedness analysis has become increasingly popular in the study of biogeographic patterns species occurrence. Nested are those which composition small assemblages is a nested subset larger assemblages. For interaction networks such as plant–pollinator webs, nestedness also proven valuable tool for revealing ecological and evolutionary constraints. Despite this popularity, there been substantial controversy literature over best methods to define quantify nestedness, how test against an...
It has been suggested that differences in body size between consumer and resource species may have important implications for interaction strengths, population dynamics, eventually food web structure, function, evolution. Still, the general distribution of consumer–resource body-size ratios real ecosystems, whether they vary systematically among habitats or broad taxonomic groups, is poorly understood. Using a unique global database on sizes, we show mean aquatic herbivorous detritivorous...
Nestedness is a common biogeographic pattern in which small communities form proper subsets of large communities. However, the detection nestedness binary presence-absence matrices will be affected by both metric used to quantify and reference null distribution. In this study, we assessed statistical performance eight metrics six model algorithms. The algorithms were tested against benchmark set 200 random nested that created passive sampling. Many have been studies are vulnerable type I...
This review identifies several important challenges in null model testing ecology: 1) developing randomization algorithms that generate appropriate patterns for a specified hypothesis; these stake out middle ground between formal Pearson–Neyman tests (which require fully‐specified distribution) and specific process‐based models parameter values cannot be easily independently estimated); 2) metrics specify particular pattern matrix, but ideally exclude other, related patterns; 3) avoiding...
Abstract Intransitive competition networks, those in which there is no single best competitor, may ensure species coexistence. However, their frequency and importance maintaining diversity real‐world ecosystems remain unclear. We used two large data sets from drylands agricultural grasslands to assess: (1) the generality of intransitive competition, (2) intransitivity–richness relationships (3) effects major drivers biodiversity loss (aridity land‐use intensification) on intransitivity...
Environmental changes strongly impact the distribution of species and subsequently composition assemblages. Although most community ecology studies represent temporal snap shots, long-term observations are rather rare. However, only such time series allow identification shifts over several decades or even centuries. We analyzed in a southeastern German butterfly burnet moth nearly 2 centuries (1840-2013). classified all observed this period according to their ecological tolerance, thereby...
Cities can host significant biological diversity. Yet, urbanisation leads to the loss of habitats, species, and functional groups. Understanding how multiple taxa respond globally is essential promote conserve biodiversity in cities. Using a dataset encompassing six terrestrial faunal (amphibians, bats, bees, birds, carabid beetles reptiles) across 379 cities on 6 continents, we show that produces taxon-specific changes trait composition, with traits related reproductive strategy showing...
The contemporary notion of professional competence is not grounded in an adequate civil society. Professional practice tends to put citizens a situation incompetence, even when it supposed serve them. In society, this acceptable state affairs. the ultimate source legitimacy lies with citizen; hence reflective that concept society should give meaningful, and competent, role play. Reflective practice, then, depends on competent citizenship. There need for simultaneous revision concepts...
Synthesis The identification of distinctive patterns in species x site presence‐absence matrices is important for understanding meta‐community organisation. We compared the performance a suite null models and metrics that have been proposed to measure segregation, aggregation, nestedness, coherence, turnover. found any matrix with segregated pairs can be re‐ordered highlight aggregated pairs, indicating these seemingly opposite are closely related. Recently classification schemes failed...
The influence of negative species interactions has dominated much the literature on community assembly rules. Patterns covariation among are typically documented through null model analyses binary presence/absence matrices in which rows designate species, columns sites, and matrix entries indicate presence (1) or absence (0) a particular site. However, outcome ultimately depends population-level processes. Therefore, patterns segregation aggregation might be more clearly expressed abundance...
The species–abundance distribution (SAD) describes the abundances of all species within a community. Many different models have been proposed to describe observed SADs. Best known are logseries, lognormal, and variety niche division models. They most often visualized using either richness – log abundance class (Preston) plots or rank order (Whittaker) plots. Because many predict very similar shapes, model distinction testing become problematic. However, can be classified into three basic...
Two opposing patterns of meta‐community organization are nestedness and negative species co‐occurrence. Both can be quantified with metrics that applied to presence‐absence matrices tested null model analysis. Previous meta‐analyses have given conflicting results, the same set apparently showing high (Wright et al. 1998) co‐occurrence (Gotelli McCabe 2002). We clarified relationship between by creating random matrices, altering them systematically increase or decrease degree co‐occurrence,...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 267:159-171 (2004) - doi:10.3354/meps267159 Degradation and mineralization of coral mucus in reef environments Christian Wild1,*, Mohammed Rasheed2, Ursula Werner1, Ulrich Franke1, Ron Johnstone3, Markus Huettel1,4 1Max Planck Institute for Microbiology, Celsiusstrasse 1, 28359 Bremen, Germany 2Marine Science...