Seed predation in the legume Crotalaria : II. Correlates of interplant variability in predation intensity.

abstract：:Resource competition is commonly invoked to explain negative effects of invasive plants on native plant abundance. If invasives out-compete natives, global changes that elevate resource availability may interact with invasives to exacerbate impacts on native communities. Indeed, evidence is accumulating that elevated ...

journal_title：Oecologia

authors： Bradford MA,Schumacher HB,Catovsky S,Eggers T,Newingtion JE,Tordoff GM

更新日期：2007-07-01 00:00:00

abstract：:Abiotic drivers of environmental stress have been found to induce CAM expression (nocturnal carboxylation) in facultative CAM species such as Mesembryanthemum crystallinum. The role played by biotic factors such as competition with non-CAM species in affecting CAM expression, however, remains largely understudied. Thi...

journal_title：Oecologia

authors： Yu K,D'Odorico P,Li W,He Y

更新日期：2017-06-01 00:00:00

abstract：:In this study we examine the influence of temperature on growth, photosynthetic performance and acclimation of two submerged macrophyte species, Elodea canadensis L.C. Rich and Ranunculus aquatilis (L.) Wimmer. The plants were grown at 5, 10 and 15°C and a photon flux density of 300 μmol m-2 s-1 (PAR) in a medium with...

journal_title：Oecologia

authors： Madsen TV,Brix H

更新日期：1997-04-01 00:00:00

abstract：:Breeding birds were censused along four elevational gradients in the Adirondack Mountains, New York, and the Green Mountains, Vermont. The bird communities of the four gradients were basically similar in species composition, richness and amplitude patterns. Three measures of species diversity decreased with increasing...

journal_title：Oecologia

authors： Able KP,Noon BR

更新日期：1976-09-01 00:00:00

abstract：:Data on soil nutrient availability for humid tropical forests are often reported, but are rarely integrated in an ecologically meaningful way with other measures of nutrient cycling. In this paper, estimates of soil nutrient availability and the inverse of litterfall nutrient concentrations (as an index of plant nutri...

journal_title：Oecologia

authors： Silver WL

更新日期：1994-08-01 00:00:00

abstract：:During extensive field surveys in central and eastern Europe, 21 herbivorous root insect species were found on Centaurea maculosa ssp. rhenana Boreau, 12 species on C. diffusa Lam. and 11 species on C. vallesiaca Jordan, representing 12 families in 4 orders. The large geographic distribution (species-area function), t...

journal_title：Oecologia

authors： Müller H

更新日期：1989-01-01 00:00:00

abstract：:Climate change does affect not only average rainfall and temperature but also their variation, which can reduce the predictability of suitable conditions for growth and reproduction. This situation is problematic for inhabitants of temporary waters whose reproductive success depends on rainfall and evaporation that de...

journal_title：Oecologia

authors： Pinceel T,Vanschoenwinkel B,Hawinkel W,Tuytens K,Brendonck L

更新日期：2017-05-01 00:00:00

abstract：:We tested the hypothesis that generally higher levels of herbivory on bittercress in sun vs in shade, especially by leaf miners, were related to the earlier phenological development of plants in the sun. Naturally-occurring plants in the sun were taller and had longer leaves than did those in the shade during the firs...

journal_title：Oecologia

authors： Collinge SK,Louda SM

更新日期：1989-04-01 00:00:00

abstract：:At constant cladode temperature the stomatal resistance of O. inermis increased when the cladode-air vapor pressure difference was increased and stomatal resistance decreased when the cladode-air vapor pressure difference was lowered. Net CO2 fixation in the dark was very responsive to these humidity dependent changes...

journal_title：Oecologia

authors： Osmond CB,Ludlow MM,Davis R,Cowan IR,Powles SB,Winter K

更新日期：1979-07-01 00:00:00

abstract：:The gas exchange characteristics of two C3 desert annuals with contrasting phenologies, Geraea canescens T. & G. (winter-active) and Dicoria canescens T. & G. (summer-active), both Asteraceae, were determined for plants grown under a moderate (25°/15° C, day/night temperature) and a high (40°/27° C) growth temperature...

journal_title：Oecologia

authors： Toft NL,Pearcy RW

更新日期：1982-11-01 00:00:00

abstract：:Predation by Saduria entomon on the depositfeeding amphipods Monoporeia (=Pontoporeia) affinis and Pontoporeia femorata was studied in laboratory experiments. Prey vulnerabilities were compared in singleprey treatments and in mixed-prey treatments, where the proportions of the two species were varied at one total dens...

journal_title：Oecologia

authors： Hill C,Elmgren R

更新日期：1992-08-01 00:00:00

abstract：:Gas exchange characteristics in leaves of the sclerophyll shrub Quercus coccifera were studied in the natural habitat in Portugal during spring and during the summer dry period. Compared to other sclerophyll species growing at the same site, photosynthesis in leaves of Quercus coccifera was less affected by water stre...

journal_title：Oecologia

authors： Tenhunen JD,Lange OL,Harley PC,Beyschlag W,Meyer A

更新日期：1985-08-01 00:00:00

abstract：:The validity of nutrient use efficiency as a central concept in ecosystem ecology has recently been subject to challenge based upon arguments over autocorrelation of data, interpretation of graphical approaches, and appropriate statistical analyses. Much of the confusion on the measurement and interpretation of nutrie...

journal_title：Oecologia

authors： Pastor J,Bridgham SD

更新日期：1999-01-01 00:00:00

abstract：:We used Y-plant, a computer-based model of crown architecture, to examine the implications of leaf reorientation resulting from petiole bending in Psychotria limonensis (Rubiaceae) seedlings. During this reorientation process, bending of the petioles of lower leaves that are potentially self-shaded by the upper leaves...

journal_title：Oecologia

authors： Gálvez D,Pearcy RW

更新日期：2003-03-01 00:00:00

abstract：:Data in the literature that in the Netherlands Carabus problematicus is an autumn breeder with overwintering larvae and adults have been confirmed. Pitfall catches show two peaks of adult beetles. The first small peak of activity is realized in May, the significance of which is not yet understood. The second higher pe...

journal_title：Oecologia

authors： Rijnsdorp AD

更新日期：1980-05-01 00:00:00

abstract：:Mixed infections, where more than one parasite genotype is present in a single host, have been suggested to be an important factor in host-parasite interactions. As the host represents a limited resource, co-infecting parasite genotypes are expected to be under resource competition. Competition will not only modify th...

journal_title：Oecologia

authors： Vizoso DB,Ebert D

更新日期：2005-03-01 00:00:00

abstract：:Studies of nitrogen (N) cycling have traditionally focused on N mineralization as the primary process limiting plant assimilation of N. Recent evidence has shown that plants may assimilate amino acids (AAs) directly, circumventing the mineralization pathway. However, the general abundance of soil AAs and their relativ...

journal_title：Oecologia

authors： Hofmockel KS,Fierer N,Colman BP,Jackson RB

更新日期：2010-08-01 00:00:00

abstract：:Waterborne chemical cues are an important source of information for many aquatic organisms, in particular when assessing the current risk of predation. The ability to use chemical cues to detect and respond to potential predators before an actual encounter can improve prey chances of survival. We investigated predator...

journal_title：Oecologia

authors： Harris S,Karlsson Green K,Pettersson LB

更新日期：2013-11-01 00:00:00

abstract：:There is growing recognition that changes in vegetation composition can strongly influence peatland carbon cycling, with potential feedbacks to future climate. Nevertheless, despite accelerated climate and vegetation change in this ecosystem, the growth responses of peatland plant species to combined warming and veget...

journal_title：Oecologia

authors： Walker TN,Ward SE,Ostle NJ,Bardgett RD

更新日期：2015-05-01 00:00:00

abstract：:Small forest dwelling mammals are considered to be major consumers and vectors of hypogeous ectomycorrhizal (ECM) fungi, which have lost the ability of active spore discharge. Fungal spore dispersal by mycophagy is deemed an important process involved in forest regeneration, resilience and vitality, primarily based on...

journal_title：Oecologia

authors： Schickmann S,Urban A,Kräutler K,Nopp-Mayr U,Hackländer K

更新日期：2012-10-01 00:00:00

abstract：:In long-lived species, adult survival is the population parameter having the highest elasticity, and therefore, it can be expected to be least affected by climatic variations. We studied the dynamics and survival of breeding female common eiders Somateria mollissima mollissima in the Baltic Sea from 1960 to 2007. Usin...

journal_title：Oecologia

authors： Hario M,Mazerolle MJ,Saurola P

更新日期：2009-04-01 00:00:00

abstract：:Habitat fragmentation modifies ecological patterns and processes through changes in species richness and abundance. In the coastal Maulino forest, central Chile, both species richness and abundance of insectivorous birds increases in forest fragments compared to continuous forest. Through a field experiment, we examin...

journal_title：Oecologia

authors： González-Gómez PL,Estades CF,Simonetti JA

更新日期：2006-05-01 00:00:00

abstract：:Computer simulations of a pollinator foraging in a mixture of two species were used to explore how plant reproduction can be influenced by interspecific pollination movements. Interspecific pollen transfer led to strong competitive effects when availabilities of pollen, receptive stigma surfaces, or pollinator movemen...

journal_title：Oecologia

authors： Waser NM

更新日期：1978-01-01 00:00:00

abstract：:In this study, we investigated whether free-living insectivorous water pipits (Anthus spinoletta) choose prey according to biochemical quality as measured by protein, lipid, carbohydrate, energy and water contents and/or according to profitability as measured by density, size and catchability. Food preference - expres...

journal_title：Oecologia

authors： Brodmann PA,Reyer HU

更新日期：1999-09-01 00:00:00

abstract：:Leptopterna dolobrata (L.) (Holarctis) and Calocoris roseomaculatus (De Geer) (Palaearctis) are single-brooded in the whole range of their distribution and hibernate in the egg stage. Both species are active only for 21/2 months, while the egg stage lasts over 9 months.The main food plants of Leptopterna are Dactylis ...

journal_title：Oecologia

authors： Braune HJ

更新日期：1971-09-01 00:00:00

abstract：:1. There is a well-defined time sequence in the oxygen consumption of Porcellio scaber. A maximal rate (the 'active rate') is obtained in woodlice subjected to the maximal disturbance of food presentation, handling and light. After initial exploratory activity has ceased, the oxygen consumption declines through a seri...

journal_title：Oecologia

authors： Newell RC,Wieser W,Pye VI

更新日期：1974-03-01 00:00:00

abstract：:This study examines the oviposition response of a specialist weevil (Mogulones larvatus) to patches of its host, the noxious weed Paterson"s curse/salvation Jane (Echium plantagineum). We simultaneously examined the effect of patch size and plant density (and their interaction), on the recorded oviposition patterns. O...

journal_title：Oecologia

authors： Shea K,Smyth M,Sheppard A,Morton R,Chalimbaud J

更新日期：2000-09-01 00:00:00

abstract：:It is widely recognized that pollinators vary in their effectiveness in pollination mutualisms, due both to differences in flower-pollinator morphological fit as well as pollinator behaviour. However, pollination webs typically treat all interactions as equal, and we contend that this method may provide misleading res...

journal_title：Oecologia

authors： Sánchez-Lafuente AM,Rodríguez-Gironés MA,Parra R

更新日期：2012-01-01 00:00:00

abstract：:The presence of spines on woody plants has been shown to limit the loss of foliage to large mammalian browsers by restricting both bite size and biting rate. We tested the hypothesis that plant spines are also an effective defense against browsing by small mammals, such as rodents, that climb within the canopy of shru...

journal_title：Oecologia

authors： Cooper SM,Ginnett TF

更新日期：1998-01-01 00:00:00

abstract：:Seasonal changes in the photosynthetic characteristics of intact involucral leaves of Anemone raddeana were investigated under laboratory conditions. Net photosynthesis and constant water vapor pressure deficit showed almost the same seasonal trend. They increased rapidly from mid-April immediately after unfolding of ...

journal_title：Oecologia

authors： Yoshie F,Yoshida S

更新日期：1987-05-01 00:00:00