Spatial and temporal niche differentiation are potential mechanisms of plant species' coexistence in many communities, including many grasslands. In a 6-year field experiment, a dominant prairie bunchgrass, Schizachyrium scoparium, excluded species sharing similar phenology and rooting depth, but coexisted with species differing in phenology and rooting ...

Predator-mediated coexistence of competitors occurs when a species that is superior in competition is also more vulnerable to a shared predator compared to a poorer competitor. The invasive mosquito Aedes albopictus is usually competitively superior to Ochlerotatus triseriatus. Among second instar larvae, A. albopictus show a lesser degree of behavioral modification in ...

Presents a laboratory investigation to demonstrate that habitat structure promotes increased organism abundance and species diversity by reducing predator effects on prey abundance. Investigates the effects of goldfish (Carassius auratus) predators on Gammarus sp. (an amphipod) and Daphnia magna (a cladoceran) prey in the absence and ...

Intraguild predation/parasitism (IGP: competing species preying on or parasitizing each other) is widespread in nature, but the mechanisms by which intraguild prey and predators coexist remain elusive. Theory predicts that a trade-off between resource competition and IGP should allow local niche partitioning, but such trade-offs are expressed only at intermediate resource ...

A major challenge in ecology is to understand how the millions of species on Earth are organized into biological communities. Mechanisms promoting coexistence are one such class of organizing processes, which allow multiple species to persist in the same trophic level of a given web of species interactions. If some mechanism promotes ...

Density-dependent seedling mortality could increase with a species relative abundance, thereby promoting species coexistence. Differences among species in light-dependent mortality also could enhance coexistence via resource partitioning. These compatible ideas rarely have been considered simultaneously. We ...

Water is a unique substance in the protoplanetary nebula since both solid and gaseous phases coexist

MASTERS THESIS: In 1982 (the researcher) initiated a study to examine any differences in the distribution and abundance between mountain and Tahoe sucker ... ...

Many related species share the same environment and utilize similar resources. This is surprising because based on the principle of competitive exclusion one would predict that the superior competitor would drive the other species to extinction; coexistence is only predicted if interspecific competition is weaker than intraspecific competition. Interspecific competition is ...

Negative density-dependent mortality can promote species coexistence through a spacing mechanism that prevents species from becoming too locally abundant. Negative density-dependent seedling mortality can be caused by interactions among seedlings or between seedlings and neighboring adults if the density of neighbors affects the ...

Organisms ranging from bacteria and corals to plants and vertebrates can form intransitive competitive networks, in which coexistence can be maintained because no one species or genotype is superior to all others. However, in the simplest case with three competing types, the long-term outcome may not be so clear if two of the three represent the ends of a continuous heritable ...

... into obligatory-and the only-reading in the ... coexistence" as a means of promoting communist advances in ... to support an existence of joy and riches. ...

Territorial damselfish are important herbivores on coral reefs because they can occupy a large proportion of the substratum and modify the benthic community to promote the cover of food algae. However, on coastal coral reefs damselfish occupy habitats that are often dominated by unpalatable macroalgae. The aim of this study was to examine whether damselfish can maintain ...

Coexistence of individuals with different species or phenotypes is often found in nature in spite of competition between them. Stable coexistence of multiple types of individuals have implications for maintenance of ecological biodiversity and emergence of altruism in society, to name a few. Various mechanisms of coexistence including ...

... to Promote Stability in an Era of Proliferation. ... of nuclear weapons and the US policy for ... crisis between the South Korean-United States alliance and ...

... or Neriene radiata. If so, will this alien spider compete with native species for microhabitat space and food, or are such resources sufficiently abundant to provide niche partitioning and species coexiste...

... competitive interactions between two abundant sympatric emydid turtles, Trachemys scripta and Pseudemys floridana, that coexist across a productivity ... ...

Background and AimsWhile within-species competition for light is generally found to be asymmetric � larger plants absorbing more than proportional amounts of light � between-species competition tends to be more symmetric. Here, the light capture was analysed in a 5-year-old competition experiment that started with ten genotypes of the clonal plant Potentilla reptans. The following hypotheses ...

... predation, and in some cases may promote species coexistence by reducing inter- and intraspecific competition (Holt and ... 2002. Intraguild predation in larval parasitoids: implications for coexistence. ...

Pathogens have been shown to contribute to the possibility of coexistence of competing plant species by creating ecological distinction between the coexisting species. This coexistence promoting mechanism resembles intra-specific density dependence as found in Lotka-Volterra models. However, plant species adapt in ...

Evolutionary-game based models of nonhierarchical, cyclically competing populations have become paradigmatic for addressing the fundamental problem of species coexistence in spatially extended ecosystems. We study the role of intraspecific competition in the coexistence and find that the competition can strongly promote the ...

We investigated the roles of resource availability and phenotypic plasticity in promoting ecological character displacement (i.e., trait evolution stemming from resource competition between species). Because ecological character displacement generates new populations that differ in resource use, this process should only occur when exploitable resources are available. We tested ...

... to contribute to the high diversity in these ecosystems. Here we study the ... fire in a Mediterranean gorse shrubland. In a first analysis we compared ... ...

... weapon program carries great risks of preemption by ... That risk is significant unless a state ... examples of preemptive attacks against nascent nuclear ...

... of the digestive tract determines the efficiency of processing food (Wang et al. 2003). Hence, differences in feeding ... ...

Spatial coexistence depends on a variety of biological and physical processes, and the relative scales of these processes may promote or suppress coexistence. We model plant competition in a spatially varying environment to show how shifting scales of dispersal, competition, and environmental heterogeneity affect ...

The expression of N-cadherin (NCAD) has been shown to correlate with increased tumor cell motility and metastasis. However, NCAD-mediated adhesion is a robust phenomenon and therefore seems to be inconsistent with the �release� from intercellular adhesion required for invasion. We show that in the most invasive melanoma and brain tumor cells, altered posttranslational processing results in ...

Competitive coexistence in a spatially heterogeneous environment is traditionally attributed to niche differences, but several recent theories have proposed important additional roles for propagule limitation and chance (e.g., neutral theory, stochastic niche theory, spatial storage effect). We tested whether propagule supply and timing of disturbance affected the ...

Identifying trait differences is an important step toward understanding differential demographic responses to the same environmental fluctuations. In the Sonoran Desert, winter annual plants exhibit high demographic variability due to variation in precipitation, and patterns of demographic variability are related to species position along a tradeoff axis between relative growth rate (RGR) and ...

... 10, 2008; Revised: June 9, 2010Keywords: Amazon, �banana-spider,� coexistence, life cycle, microhabitat preferences, wandering spiders Spiders of ... reproductive behavior) are factors that contribute to...

this is aided by a combination of; 1) a higher availability of caterpil- lars late in the season and 2 weight changes the results. Considering previous work showing consis- tent natural selection on early

... Anad�n, Andr�s Gim�nez, Rub�n Ballestar, Eva Graci�, Daniel Oro. (2011) Coexisting with fire: The case of the terrestrial tortoise Testudo graeca in ... ...

Four species of sandpipers of the genus Calidris (alpina, melanotos, bairdii and pusillus) are regular and abundant members of the insectivore fauna of low wet grass-dominated tundra near Barrow, Alaska. Their diets overlap broadly. Among adults the perio...

... Society. New York. 377. Uetz, G. W. 1977. Coexistence in a guild of wandering spiders. Journal of Animal Ecology 46:531�541. CrossRefVenables, ... ...

We propose a model for cyclically competing species on continuous space and investigate the effect of the interplay between the interaction range and mobility on coexistence. A transition from coexistence to extinction is uncovered with a strikingly nonmonotonic behavior in the coexistence probability. About the minimum in the ...

We propose a model for cyclically competing species on continuous space and investigate the effect of the interplay between the interaction range and mobility on coexistence. A transition from coexistence to extinction is uncovered with a strikingly nonmonotonic behavior in the coexistence probability. About the minimum in the ...

We measured spatial and temporal patterns of seed dispersal and seedling recruitment for 58 species in a grassland community to test whether seed dispersal could predict patterns of invasion after disturbance. For the 12 most abundant grasses, recruitment of native species was dependent on the propagule supply of both native and exotic species. Variability in seed rain on ...

The history of Chinese seismology can be traced back to four thousand years before and divided into four stages, i.e., primitive knowledge, worship of nature, perceptual knowledge and scientific research. The second stage ran in the whole Qin-Han dynasties, and the fourth stage began from Emperor Kangxi in Qing Dynasty and continued to the present. So far China has made four great contributions to ...

Abundant coesite and quartz coexist with the shock-produced silica glasses that retain the morphology of primary quartz in the gneiss clasts of polymict breccia from the Xiuyan crater. Quartz occurs as idiomorphic, needle-like and spherulitic crystals, and polycrystalline aggregates. Coesite occurs as granular or idiomorphic, dendritic and needle-like ...

How multiple species coexist in the face of limiting resources remains one of the central questions in ecology. Recent theoretical and empirical studies have documented the importance of evolutionary forces in species coexistence. However, there remains a disconnect between these two approaches, as empirical studies are generally too short to explore ...

Lithium (Li) abundances and isotope compositions are presented for well-studied spinel peridotite xenoliths from Atsagin-Dush, Mongolia. The xenoliths range from fertile lherzolites, which have LREE-depleted patterns and experienced little or no metasomatism, to refractory harzburgites characterized by strong LREE-enrichments, marked negative anomalies of high-field-strength ...

Fine abundance analyses of eight delta Delphini stars and one delta Scuti star relative to four comparison standard stars are presented. Five of the delta Delphini stars are shown to have abundances most similar to the evolved Am stars. It is argued that these abundances are different from the main-sequence Am star and Ap star ...

The maintenance of colour polymorphisms within populations has been a long-standing interest in evolutionary ecology. African cichlid fish contain some of the most striking known cases of this phenomenon. Intrasexual selection can be negative frequency dependent when males bias aggression towards phenotypically similar rivals, stabilizing male colour polymorphisms. We propose that where females ...

... H. Myers. 2002. Multiple agents in biological control: improving the odds? Biol. Control 24: 20�30. CrossRefDiekmann, O., J. ... ...

... frequency-dependent selection in vesicular stomatitis virus and human immunodeficiency virus type 1. Our results suggest that frequency-dependent ... by Yuste et al. (2002) in experiments with HIV, and th...

: conspecific nurse effects in Frasera speciosa and Cirsium scopulorum. Ecology 79:1657�1668 Whittaker RH, Levin

... fluctuating competition (both inter- and intraspecific) promotes the coexistence of competing species (Chesson and Warner 1981, Caceres ... that intraspecific and interspecific competition interact to pro...

... 520. CrossRef, CSAFenchel, T. 1975. Character displacement and coexistence in mud snails (Hydrobiidae). Oecologia 20:19�32. ... plasticity interact to promote character displacement and species coexistenc...

The rise of antimicrobial resistance in many pathogens presents a major challenge to the treatment and control of infectious diseases. Furthermore, the observation that drug-resistant strains have risen to substantial prevalence but have not replaced drug-susceptible strains despite continuing (and even growing) selective pressure by antimicrobial use presents an important problem for those who ...

Understanding under what conditions interacting populations, whether they be plants, animals, or viral particles, coexist is a question of theoretical and practical importance in population biology. Both biotic interactions and environmental fluctuations are key factors that can facilitate or disrupt coexistence. To better understand this interplay between ...

The increasing evidence of coexistence of cryptic species with no recognized niche differentiation has called attention to mechanisms reducing competition that are not based on niche-differentiation. Only sex-based mechanisms have been shown to create the negative feedback needed for stable coexistence of competitors with completely overlapping niches. ...

The increasing evidence of coexistence of cryptic species with no recognized niche differentiation has called attention to mechanisms reducing competition that are not based on niche-differentiation. Only sex-based mechanisms have been shown to create the negative feedback needed for stable coexistence of competitors with completely overlapping niches. ...

The importance of neutral dynamics is contentiously debated in the ecological literature. This debate focuses on neutral theory's assumption of fitness equivalency among individuals, which conflicts with stabilizing fitness that promotes coexistence through niche differentiation. I take advantage of competition-colonization trade-offs between species of ...

Theory suggests that source-sink dynamics can allow coexistence of intraguild predators and prey, but empirical evidence for this coexistence mechanism is limited. We used capture-mark-recapture, genetic methods, and stable isotopes to test whether source-sink dynamics promote coexistence between stream fishes, the ...

How expected increases in climate variability will affect species diversity depends on the role of such variability in regulating the coexistence of competing species. Despite theory linking temporal environmental fluctuations with the maintenance of diversity, the importance of climate variability for stabilizing coexistence remains unknown because of a ...

This article uses as a point of departure for its analysis a recent educational policy initiative to promote peaceful coexistence in the context of ongoing ethnic division in Cyprus. It is argued that, although it seems as if the teaching of peaceful coexistence is a laudable initiative that can contribute toward unity and democratic ...

Evidence suggests that the diversity of microbial life in the vadose zone exceeds diversity found in all other compartments of the biosphere. Such rich diversity is believed to be promoted by complexity of resource and microenvironments and by fragmentation of aquatic habitats in unsaturated soils that limit diffusion pathways and form physically isolated niches capable of ...

Biodiversity has both fascinated and puzzled biologists. In aquatic ecosystems, the biodiversity puzzle is particularly troublesome, and known as the `paradox of the plankton'. Competition theory predicts that, at equilibrium, the number of coexisting species cannot exceed the number of limiting resources. For phytoplankton, only a few resources are potentially limiting: ...

The introduced parasitoid wasp Aphytis melinus, the most widespread natural enemy of the California red scale (Aonidiella aurantii) and the superior competitor, has displaced the native Aphytis chrysomphali from most citrus areas of the Mediterranean basin and other citrus areas all over the world. However, our extensive survey data on the scale parasitoid populations collected in 2004-2008 show ...

The recent renewal of interest in community structure was strongly stimulated by the concept of neutrality, a new view on the problem of species coexistence. In contrast to traditional approach claiming that species competing for common resources should occupy different ecological niches, the neutrality concept assumes that species can coexist if they are ...

Several recent advances in coexistence theory emphasize the importance of space and dispersal, but focus on average dispersal rates and require spatial heterogeneity, spatio-temporal variability or dispersal-competition tradeoffs to allow coexistence. We analyse a model with stochastic juvenile dispersal (driven by turbulent flow in the coastal ocean) and ...

Theories for species coexistence often emphasize niche differentiation and temporal segregation of recruitment to avoid competition. Recent work on mutualism suggested that plant species sharing pollinators provide mutual facilitation when exhibit synchronized reproduction. The facilitation on reproduction may enhance species persistence and coexistence. ...

We analyse here the vaccine model with cross-immunity proposed by Porco and Blower [1]. Porco and Blower [1] show that vaccination can shift the competitive balance in favour of a strain that, without vaccination, would be out-competed and that vaccination can also promote coexistence of different strains, something that normally is not expected [2]. Their ...

Feb 15, 2011 ... Over the past decade great progress has been made in characterizing the abundance and diversity of the deep subsurface biosphere, but ...

Jan 5, 2006 ... The abundance of water facilitated the Egyptian government's promotion of another massive water distribution system called New Valley. ...

The abundance of water facilitated the Egyptian government's promotion of another massive water distribution system called the New Valley. ...

... when honeydew resources are abundant. Ants also provide sanitation services, and in some cases their elimination has been ... ...

Ecologists have long been intrigued by the factors that control the pattern of biodiversity, i.e., the distribution and abundance of species. Previous studies have demonstrated that coexisting species partition their resources and/or that the compositional similarity between communities is determined by environmental factors, lending support to the ...

A small group of phytoplankton species that produce toxic or allelopathic chemicals has a significant effect on plankton dynamics in marine ecosystems. The species of non-toxic phytoplankton, which are large in number, are affected by the toxin-allelopathy of those species. By analysis of the abundance data of marine phytoplankton collected from the North-West coast of the Bay ...

Elucidating the mechanisms of species coexistence is a crucial goal in ecology. Theory suggests that, when resource abundance fluctuates, coexistence can be achieved if each species in a competing pair is better at exploiting resources at opposite extremes of a fluctuating resource spectrum. Nonetheless, the proximal mechanisms ...

Understanding mechanisms fostering coexistence between invasive and resident species is important in predicting ecological, economic, or health impacts of invasive species. The mosquito Aedes aegypti coexists at some urban sites in southeastern United States with invasive Aedes albopictus, which is often superior in interspecific competition. We tested ...

In order to understand the role of space in ecological communities where each species produces a certain type of resource and has varying abilities to exploit the resources produced by its own species and by the other species, we carry out a comparative study of an interacting particle system and its mean-field approximation. For a wide range of parameter values, we show both analytically and ...

How biological diversity is generated and maintained is a fundamental question in ecology. Ecologists have delineated many mechanisms that can, in principle, favor species coexistence and hence maintain biodiversity. Most such coexistence mechanisms require or imply tradeoffs between different aspects of species performance. However, it remains unknown ...

A prominent feature of transcription in Giardia lamblia is the abundant production of sterile antisense transcripts (Elmendorf et al. The abundance of sterile transcripts in Giardia lamblia. Nucleic Acids., 29, 4674�4683). Here, we use a computational biology analysis of SAGE data to assess the abundance and distribution of sense and ...

Despite 15 years of sporadic efforts, religion today in Bosnia and Herzegovina is more of a hindrance than a help to promoting peaceful coexistence among the region's various ethnic and religious groups. Polarization and extremism make religions other than one's own even more distant, strange and threatening. Physical interaction that existed before the ...

We present a FUSE abundance analysis of EC14026 stars. We compare the abundances of heavy elements in the atmospheres of EC14026 stars to non-pulsating stars with similar atmospheric parameters, and investigate whether weak stellar winds could explain the coexistence of variable and non-variable sdB stars in the log g Teff diagram. ...

Microscopic models based on evolutionary games on spatially extended scales have recently been developed to address the fundamental issue of species coexistence. In this pursuit almost all existing works focus on the relevant dynamical behaviors originated from a single but physically reasonable initial condition. To gain comprehensive and global insights into the dynamics of ...

Microscopic models based on evolutionary games on spatially extended scales have recently been developed to address the fundamental issue of species coexistence. In this pursuit almost all existing works focus on the relevant dynamical behaviors originated from a single but physically reasonable initial condition. To gain comprehensive and global insights into the dynamics of ...

It is widely accepted that niche differentiation plays a key role in coexistence on relatively small scales. With regard to a large community scale, the recently propounded neutral theory suggests that species abundances are more influenced by history and chance than they are by interspecies competition. This inference is mainly based on the probability ...

A mainstay of ecological theory and practice is that coexisting species use different resources, leading to the local development of biodiversity. However, a problem arises for understanding coexistence of multiple species if they share critical resources too generally. Here, we employ an experimental framework grounded in nutritional physiology to show ...

The coexistence of ecologically similar species may occur because of resources distribution, such as prey and habitat type and segregation time, that minimizes the interspecific competition. The changes brought about by Hurricane Isidore in the distribution of food resources by three coexisting fish species of the family Tetraodontidae (Sphoeroides ...

A survaey of Corsican Molluscs, in October 1980, confirms the extension of Potamopyrgus jenkinsi. However two types of biotopes could be distinguished. In the first Potamopyrgus is very abundant and Isidora truncata (= Bulinus truncatus) was not found. In the second type Potamopyrgus are less numerous and coexist with Bulinids. That the colonization by ...

.e., zero-flux boundaries). Derivation of payoffs. Public-goods games are played in randomly formed groups cooperators and defectors can coexist, depends on the multiplication factor of the public good, r relative abundance of defectors that diminish the public good, the population cannot recover and goes

on the coexistence of two annual plant species in the Chihuahuan Desert of Arizona: Erodium cicutarium, which is locally abundant and Phacelia popeii, which is locally sparse, hereafter referred to as Erodium within neighborhoods if Erodium's intra- specific competition is greater than the interspecific

- thoceras), do not supportlarvaldevelopment(Barbarea vulgaris),or germinate too late to be available abundant [Perkins 1888; Brainerdet al. 1900].) Barbarea vulgaris,on the otherhand, does not supportgrowthofP. oleracea larvae. The one P. oleracea larvafoundon Barbarea vulgaris(fig.3) was neara fewBarbarea

This article presents the theoretical framework, methodology and the main results of a comparative research on the promotion of children's social participation in Italy and Scotland, which was based on politicians', managers' and practitioners' representations. Promotion of participation here is considered a form of social intervention in which adults ...

A promoted electron transfer of an antitumor drug, mitoxantrone (MTX), intercalating into DNA duplex was successfully obtained upon addition of cytochromes c (cyt. c) in NaAc-HAc buffer solution (pH 4.5). The experimental results suggested that co-existence of MTX and cyt. c in the DNA helix is an important factor for accelerated electron transfer of MTX, ...

Lipid bilayer membranes composed of DOPC, DPPC, and a series of sterols demix into coexisting liquid phases below a miscibility transition temperature. We use fluorescence microscopy to directly observe phase transitions in vesicles of 1:1:1 DOPC/DPPC/sterol within giant unilamellar vesicles. We show that vesicles containing the �promoter� sterols ...

The variation of abundances of intermediate snail hosts of Fasciola hepatica in Cuba (Fossaria cubensis and Pseudosuccinea columella) was studied during one year under natural conditions at five sampling sites in San Juan y Martinez municipality, Pinar del Rio province, Cuba. The effect of some environmental variables on the lymnaeid abundances was also ...

Tree cover in savanna ecosystems is usually regarded as unstable, varying with rainfall, fire, and herbivory. In sub-Saharan Africa, elephants (Loxodonta africana) suppress tree cover, thereby maintaining landscape heterogeneity by promoting tree-grass coexistence. In the absence of elephants, tree encroachment may convert savannas into closed-canopy ...

At least two distinct trade-offs are thought to facilitate higher diversity in productive plant communities under herbivory. Higher investment in defence and enhanced colonization potential may both correlate with decreased competitive ability in plants. Herbivory may thus promote coexistence of plant species exhibiting divergent life history strategies. ...

Resource partitioning has been suggested as an important mechanism of invasion resistance. The relative importance of resource partitioning for invasion resistance, however, may depend on how species abundance is distributed in the plant community. This study had two objectives. First, we quantified the degree to which one resource, nitrogen (N), is partitioned by time, depth ...

The present paper looks at teachers' perceptions of difficulties and emotions about a recent policy initiative in the Greek-Cypriot educational system to promote peaceful coexistence. This policy initiative by the government sparked strong emotional reactions. This paper provides an in-depth understanding of the intersection between tensions at the larger ...

For the past decade, several health care systems are undergoing continuous administrative restructuring, whose main objective is cost reduction. These changes often result in the patients' needs not being met because nurses are continuously affected by widespread budget cuts and staff downsizing. Have we reached a point, where we are setting aside our prime directive of patient well-being for the ...

A two-year (1998-2000) School-Family Partnership for Coexistence (SFPC) programme was implemented in Acre, a mixed Jewish-Arab city in Israel, to promote parents' role as facilitators of their children literacy development and to empower parents to advance coexistence and inter-group relations. The SFPC program was part of a five-year ...

Coexistence through a variety of mechanisms is possible for species with differential responses to environmental conditions. Understanding the role of environmental heterogeneity in mediating coexistence of species of different provenance (i.e., native vs. exotic) has important implications for theory and management. We used two California grassland data ...

Intraguild (IG) predation is an important factor influencing community structure, yet factors allowing coexistence of IG predator and IG prey are not well understood. The existence of spatial refuges for IG prey has recently been noted for their importance in allowing coexistence. However, reduction in basal prey availability might lead IG prey to leave ...

The levels of coexistence between Pseudomonas syringae and various nonpathogenic epiphytic species in the phyllosphere of beans (Phaseolus vulgaris) were assessed by using replacement series. The epiphytic species Pseudomonas fluorescens, Pantoea agglomerans, Stenotrophomonas maltophilia, and Methylobacterium organophilum were all capable of exhibiting higher levels of ...

Ni3V2O8 catalyst was prepared by oxalate co-precipitation method with microwave heating in this paper. In order to study the relationship between the catalytic performance and the surface species, the catalyst was characterized by XRD, BET, H2-TPR, XPS, TEM and conductivity measurement. The surface property of Ni3V2O8 was studied by XPS and the catalytic performance of the oxidative ...

Multi-quasiparticle high-K states in neutron-deficient mercury, lead, and polonium isotopes have been investigated systematically by means of configuration-constrained potential-energy-surface calculations. An abundance of high-K states is predicted with both prolate and oblate shapes, which extends the shape coexistence of the mass region. Well-deformed ...

The dielectric permittivities of anionic and nonionic oil-continuous microemulsions have been measured with varying water content, temperature, alkane carbon number, and electrolyte concentration. The data confirm the hypothesis that underlying phase behavior and consequent morphology have a profound effect on the dielectric properties of microemulsions. The results make it ...

Ecologists now recognize that controversy over the relative importance of niches and neutrality cannot be resolved by analyzing species abundance patterns. Here, we use classical coexistence theory to reframe the debate in terms of stabilizing mechanisms (niches) and fitness equivalence (neutrality). The neutral model is a special case where stabilizing ...

always coexist. The basins thus provide a global picture of the coexistence prob- lem. At the boundariesBasins of coexistence and extinction in spatially extended ecosystems of cyclically competing insights into the dynamics of coexist- ence, here we explore the basins of coexistence and ...

DNA sequence analysis showed that pyruvate decarboxylase (one of the most abundant proteins in Zymomonas mobilis) contains 559 amino acids. The promoter for the gene encoding pyruvate decarboxylase was not recognized by Escherichia coli, although the cloned gene was expressed at relatively high levels under the control of alternative ...

DNA sequence analysis showed that pyruvate decarboxylase (one of the most abundant proteins in Zymomonas mobilis) contains 559 amino acids. The promoter for the gene encoding pyruvate decarboxylase was not recognized by Escherichia coli, although the cloned gene was expressed at relatively high levels under the control of alternative ...

Culicid larvae were collected in snow-melt pools during the first half of June from 1975-1977 and 1995-1996 in the Abisko Valley, Torne Lapmark, northern Sweden. Twelve species were collected from 102 pools and 81 localities with 7,914 specimens (elevations from 300 to 650 m a.s.l.). Fourteen species are now known from the area. Ten types of larval habitats were classified and ten species were ...