Plant growth and aboveground production respond differently to late-season deluges in a semi-arid grassland.

abstract：:Ring-shaped growth patterns commonly occur in resource-limited arid and semi-arid environments. The spatial distribution, geometry, and scale of vegetation growth patterns result from interactions between biotic and abiotic processes, and, in turn, affect the spatial patterns of soil moisture, sediment transport, and ...

journal_title：Oecologia

authors： Ravi S,D'Odorico P,Wang L,Collins S

更新日期：2008-12-01 00:00:00

abstract：:Enemy release often is invoked to explain the success of invasive plants: an invader benefits from reduced attack as it escapes specialized enemies through the invasion process. Enemy release typically is thought of as occurring at large geographic scales, but local-scale interactions may also be important for invader...

journal_title：Oecologia

authors： Nunes KA,Kotanen PM

更新日期：2018-09-01 00:00:00

abstract：:Amazon forests along a toposequence at San Carlos de Rio Negro (Venezuela) show distinct nutrient limitations depending on slope position. Soils were collected by genetic horizons and analysed to provide information on the relationships between soil P and N status and the nutrition of natural forest at three locations...

journal_title：Oecologia

authors： Tiessen H,Chacon P,Cuevas E

更新日期：1994-09-01 00:00:00

abstract：:Adults of the leaf beetle Plagiodera versicolora Laich, avoided previously injured shoots of Salix alba 'Tristis' in favor of nearby uninjured ones. The response was rapid and persisted for five days of study. During brief periods of observation, the vast majority of beetles engaged in behaviors other than locomotion ...

journal_title：Oecologia

authors： Raupp MJ,Sadof CS

更新日期：1989-08-01 00:00:00

abstract：:Carbon isotope ratios, photosynthesis, and transpiration were measured on a xylem-tapping mistletoe (Phoradendron juniperinum) and its host (Juniperus osteosperma) in southern Utah, USA. For host tissues, the carbon isotope ratios agreed with theoretical values predicted from gas exchange observations. However, for mi...

journal_title：Oecologia

authors： Marshall JD,Ehleringer JR

更新日期：1990-09-01 00:00:00

abstract：:The similarity in species composition between two communities generally decays as a function of increasing distance between them. Parasite communities in vertebrate definitive hosts follow this pattern but the respective relationship in intermediate invertebrate hosts of parasites with complex life cycles is unknown. ...

journal_title：Oecologia

authors： Thieltges DW,Ferguson MA,Jones CS,Krakau M,de Montaudouin X,Noble LR,Reise K,Poulin R

更新日期：2009-05-01 00:00:00

abstract：:A reanalysis of data presented by Henneman (1983) to examine the relationship between intrinsic rate of increase and basal metabolism suggests there is no statistically significant correlation between the two variables when both are treated with comparable statistical techniques. In addition, I suggest there is no the...

journal_title：Oecologia

authors： Hayssen V

更新日期：1984-11-01 00:00:00

abstract：:1. The defecation behavior of the parasitoid larvae of Aleochara curtula in the Calliphora puparium was described. After occupation of the puparium the first-instar larva begins to defecate. With these excrements the larva closes the entry hole. Afterwards the first-instar larva as well as later the second-instar larv...

journal_title：Oecologia

authors： Fuldner D,Pfenning R

更新日期：1973-06-01 00:00:00

abstract：:Like many polyphagous herbivores, individuals of Sarasinula plebeia (Fischer) (Soleolifera: Veronicellidae) consume a variety of plant species that may differ in nutritional content. In this study we determined the ability of these slugs to compensate for such variation in diet composition. Dilution with water of an a...

journal_title：Oecologia

authors： Rueda AA,Slansky F Jr,Wheeler GS

更新日期：1991-10-01 00:00:00

abstract：:Northern deer populations are typically partially migratory, but the relationship between migratory movements and parasites has received little attention. Migration often involves movement from a low-elevation winter range towards a summer range at higher elevation. In Europe these movements may also involve a gradien...

journal_title：Oecologia

authors： Mysterud A,Qviller L,Meisingset EL,Viljugrein H

更新日期：2016-02-01 00:00:00

abstract：:Senecio vulgaris from ruderal habitats may colonise crop fields and persist in the new environment. Persistence may occur through phenotypic plasticity or genetic differentiation. In the presence of genetic variation, differential responses of life history traits to selection may lead to local adaptation. A reciprocal...

journal_title：Oecologia

authors： Leiss KA,Müller-Schärer H

更新日期：2001-07-01 00:00:00

abstract：:Gene frequencies at nine polymorphic enzyme loci were followed in 22 cage populations of D. melanogaster all founded from the same stock but subsequently maintained in different environments. The three factors distinguishing the different environments were temperature and the alcohol and yeast in the medium and for ea...

journal_title：Oecologia

authors： Oakeshott JG

更新日期：1979-12-01 00:00:00

abstract：:The competitive interactions between roach (Rutilus rutilus) and rudd (Scardinius erythrophthalmus) were investigated in two habitats, the open water and the waterlily zone. The growth rates of both species in enclosures were lower when confined together than when alone, demonstrating interspecific competition. Allopa...

journal_title：Oecologia

authors： Johansson L

更新日期：1987-08-01 00:00:00

abstract：:A large number of time series of abundances of insects and birds from a variety of data sets were submitted to a new density dependence test. The results varied enormously between data sets, but the relation between the frequency of statistically significant density dependence (SSDD) and the length of the series was s...

journal_title：Oecologia

authors： Wolda H,Dennis B

更新日期：1993-10-01 00:00:00

abstract：:Indications of global climate change and associated unusual temperature fluctuations have become increasingly obvious over the past few decades. Consequently, the relevance of temperature increases for ecological communities and for whole ecosystems is one of the major challenges of current ecological research. One ap...

journal_title：Oecologia

authors： Norf H,Arndt H,Weitere M

更新日期：2007-03-01 00:00:00

abstract：:Standard infra-red gas analysis techniques were used to compare the photosynthesis of the liverworts Marchantia foliacea Mitt. and Monoclea forsteri Hook. Parameters measured include net photosynthetic rates, light response curves, quantum efficiencies, diffusive resistances to CO2 and water, apparent photorespiration...

journal_title：Oecologia

authors： Green TG,Snelgar WP

更新日期：1982-08-01 00:00:00

abstract：:Carbohydrate, lipid, and protein compositions are stoichiometrically related to organic CHN (carbon, hydrogen, nitrogen) contents. Elemental CHN analyses of total biomass and ash, therefore, provide a basis for the calculation of proximate biochemical composition and bomb caloric value. The classical nitrogen to prote...

journal_title：Oecologia

authors： Gnaiger E,Bitterlich G

更新日期：1984-06-01 00:00:00

abstract：:The study illustrates the ecological determinants and evolutionary consequences of dispersal in the pond-living water beetle Dineutus assimilis (Coleoptera: Gyrinidae). Over 2 years, local populatiopn dynamics were studied in 51 ponds within a 60-km2 study area. In most of the 31 occupied ponds, and even in large popu...

journal_title：Oecologia

authors： Nürnberger B

更新日期：1996-05-01 00:00:00

abstract：:Demographic characteristics associated with the maintenance and growth of populations, such as seed dynamics, seedling emergence, survival, and tiller dynamics were examined for two tussock grasses, the native Agropyron spicatum and the introduced Agropyron desertorum in a 30-month field study. The introduced grass wa...

journal_title：Oecologia

authors： Pyke DA

更新日期：1990-04-01 00:00:00

abstract：:Previous studies have shown that green sunfish, Lepomis cyanellus, have strong effects on the activity, habitat use, social interactions and mating dynamics of a stream-dwelling water strider, Aquarius remigis (family Gerridae, hence, gerrids). In nature, however, stream pools often contain not just sunfish and water ...

journal_title：Oecologia

authors： Sih A,Krupa JJ

更新日期：1996-01-01 00:00:00

abstract：:We assessed the performance of two estimators of species richness, the Chao2 and the Coleman 'random placement curve'. Using a dataset of intertidal fish from the Norwegian Skagerrak coast, we found that Chao2 was effective for low sampling intensity, often reaching asymptotic values for few samples, but for higher sa...

journal_title：Oecologia

authors： Lekve K,Ellingsen KE,Lingjaerde OC,Gjøsaeter J,Stenseth NC

更新日期：2005-06-01 00:00:00

abstract：:Effects of habitat fragmentation on species diversity and herbivore-parasitoid interactions were analyzed using the insect community of seed feeders and their parasitoids in the pods of the bush vetch (Vicia sepium L.). Field studies were carried out on 18 old meadows differing in area and isolation. The area of these...

journal_title：Oecologia

authors： Kruess A,Tscharntke T

更新日期：2000-01-01 00:00:00

abstract：:Although consumers often rely on chemical information to optimize their foraging strategies, it is poorly understood how top carnivores above the third trophic level find resources in heterogeneous environments. Hyperparasitoids are a common group of organisms in the fourth trophic level that lay their eggs in or on t...

journal_title：Oecologia

authors： Cusumano A,Harvey JA,Dicke M,Poelman EH

更新日期：2019-03-01 00:00:00

abstract：:We studied the relationships between body size and (a) abundance and (b) host specificity in fleas parasitic on small mammals (rodents and shrews) in the Palearctic taking into account the confounding effect of phylogeny. We tested these relationships both across 127 flea species and within separate phylogenetic clade...

journal_title：Oecologia

authors： Surkova EN,Warburton EM,van der Mescht L,Khokhlova IS,Krasnov BR

更新日期：2018-10-01 00:00:00

abstract：:The Alaskan tussock tundra is a strongly nutrient-limited ecosystem, where almost all vascular plant species are mycorrhizal. We established a long-term removal experiment to document effects of arctic plant species on ecto- and ericoid mycorrhizal fungi and to investigate whether species interactions and/or nutrient ...

journal_title：Oecologia

authors： Urcelay C,Bret-Harte MS,Díaz S,Chapin FS 3rd

更新日期：2003-11-01 00:00:00

abstract：:The effects of irradiance during growth on biomass allocation, growth rates, leaf chlorophyll and protein contents, and on gas exchange responses to irradiance and CO2 partial pressures of the evergreen, sclerophyllous, chaparral shrub, Ceanothus megacarpus were determined. Plants were grown at 4 irradiances for the g...

journal_title：Oecologia

authors： Mahall BE,Schlesinger WH

更新日期：1982-09-01 00:00:00

abstract：:Body size at metamorphosis is a critical trait in the life history of amphibians. Despite the wide-spread use of amphibians as experimental model organisms, there is a limited understanding of how multiple abiotic and biotic factors affect the variation in metamorphic traits under natural conditions. The aim of our st...

journal_title：Oecologia

authors： Indermaur L,Schmidt BR,Tockner K,Schaub M

更新日期：2010-07-01 00:00:00

abstract：:The costs and benefits of resource integration in Hydrocotyle bonariensis were examined by comparing severed and intact clones grown across multiple resource gradients. Basipetal movement of water, nitrogen and photosynthates was demonstrated to occur between two rhizome branch systems interconnecting hundreds of rame...

journal_title：Oecologia

authors： Evans JP

更新日期：1991-04-01 00:00:00

abstract：:Plant-plant facilitation is a crucial ecological process, as many plant species (facilitated) require the presence of an established individual (nurse) to recruit. Some plant facilitative interactions disappear during the ontogenetic development of the facilitated plant but others persist, even when the two plants are...

journal_title：Oecologia

authors： Montesinos-Navarro A,Segarra-Moragues JG,Valiente-Banuet A,Verdú M

更新日期：2016-06-01 00:00:00

abstract：:Despite many studies highlighting the widespread occurrence and effects of resource movement between ecosystems, comparatively little is known about how anthropogenic alterations to ecosystems affect the strength, direction and importance of such fluxes. Hydrological regime and riparian land use cause well-documented ...

journal_title：Oecologia

authors： Greenwood MJ,Booker DJ

更新日期：2016-02-01 00:00:00