Leaf litter resource quality induces morphological changes in wood frog (Lithobates sylvaticus) metamorphs.

abstract：:Florivores are present in many pollination systems and can have direct and indirect effects on both plants and pollinators. Although the impact of florivores are commonly examined in facultative pollination mutualisms, their effects on obligate mutualism remain relatively unstudied. Here, we used experimental manipula...

journal_title：Oecologia

authors： Althoff DM,Xiao W,Sumoski S,Segraves KA

更新日期：2013-12-01 00:00:00

abstract：:The influence of short- and long-term (cohort) effects of climate and density on the life-histories of ungulates in temperate regions may vary with latitude, habitat, and management practices, but the life-histories of ungulates in the Mediterranean region are less well known. This study examined the short- and long-t...

journal_title：Oecologia

authors： Rodriguez-Hidalgo P,Gortazar C,Tortosa FS,Rodriguez-Vigal C,Fierro Y,Vicente J

更新日期：2010-10-01 00:00:00

abstract：:The concept of trade-offs between reproduction and other fitness traits is a fundamental principle of life history theory. For many plant species, the cost of sexual reproduction affects vegetative growth in years of high seed production through the allocation of resources to reproduction at different hierarchical lev...

journal_title：Oecologia

authors： Sánchez-Humanes B,Sork VL,Espelta JM

更新日期：2011-05-01 00:00:00

abstract：:We assessed the combined effects of varying the relative density and the relative floral morphological complexity of plant species on the behaviour of their bumblebee pollinators. Three species of bumblebee (Bombus pascuorum, B. terrestris and B. hortorum) were observed foraging on experimental arrays consisting of pa...

journal_title：Oecologia

authors： Stout JC,Allen JA,Goulson D

更新日期：1998-12-01 00:00:00

abstract：:Pre-hatching developmental times for prosobranch gastropods are greatly influenced by temperature and taxonomic affinity. If the data used here (including all available data from the Muricacea) are a representative sample, then reasonably accurate estimates of developmental time can be obtained for most prosobranchs k...

journal_title：Oecologia

authors： Spight TM

更新日期：1975-03-01 00:00:00

abstract：:The optimal strategy in the design of nature reserves is investigated by means of the theory of island biogeography. Some previous results are revised. A new form of the incidence functions is presented. Their merit is that they do not ignore the minimum area requirements, they are more flexible, and in a number of in...

journal_title：Oecologia

authors： Kindlmann P

更新日期：1983-08-01 00:00:00

abstract：:Much more tannic acid or pin oak tannin is required to precipitate the abundant leaf protein, ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBPC), from Manduca sexta gut fluid adjusted to pH 6.5 than is required to precipitate this protein from an aqueous buffer at the same pH. This finding demonstrates that some ...

journal_title：Oecologia

authors： Martin MM,Martin JS

更新日期：1984-03-01 00:00:00

abstract：:Gas exchange characteristics of droughted and rewatered Portulacaria afra were studied during the seasonal shift from CAM to C3 photosynthesis. 14CO2 uptake, stomatal conductance, and total titratable acidity were determined for both irrigated and 2, 4, and 7.5 month waterstressed plants from summer 1984 to summer 198...

journal_title：Oecologia

authors： Guralnick LJ,Ting IP

更新日期：1986-08-01 00:00:00

abstract：:Carbon dioxide efflux and soil microenvironmental factors were measured diurnally in Carex aquatilus-and Eriophorum angustifolium-dominated riparian tundra communities to determine the relative importance of soil environmental factors controlling ecosystem carbon dioxide exchange with the atmosphere. Measurements were...

journal_title：Oecologia

authors： Oberbauer SF,Gillespie CT,Cheng W,Gebauer R,Serra AS,Tenhunen JD

更新日期：1992-12-01 00:00:00

abstract：:The potential production of estuarine interstitial microalgae from two tidal flats differing in sediment texture was determined manometrically. Sediment cores from the Southbeach tidal flat showed a maximum amount of productivity in the lower intertidal zone whereas sediment cores from Sally's Bend showed no productio...

journal_title：Oecologia

authors： Riznyk RZ,Phinney HK

更新日期：1972-09-01 00:00:00

abstract：:Generalist parasites may disproportionately use certain hosts because of different benefits associated with each host species. I measured the growth rate of the marine snail Trichotropis cancellata, a facultative kleptoparasite that can suspension feed and steal food, on different hosts to determine the relative nutri...

journal_title：Oecologia

authors： Iyengar EV

更新日期：2004-03-01 00:00:00

abstract：:Plasticity in water-use efficiency (WUE) was examined in populations of Picea glauca (Moench) Voss and P. sitchensis (Bong.) Carr. and their natural hybrids from an ecocline along the Skeena Valley, British Columbia, which runs from the dry continental interior (P. glauca) to the wet maritime Pacific coast (P. sitchen...

journal_title：Oecologia

authors： Silim S,Guy R,Patterson T,Livingston N

更新日期：2001-08-01 00:00:00

abstract：:Aggregations of different-looking animals are frequently seen in nature, despite well-documented selection pressures on individuals to maintain phenotypically homogenous groups. Two well-known theories, the 'confusion effect' (reduced ability of a predator to accurately target an individual in a group) and the 'oddity...

journal_title：Oecologia

authors： Rodgers GM,Kimbell H,Morrell LJ

更新日期：2013-05-01 00:00:00

abstract：:Consumers do not always utilize all suitable hosts. Understanding why parasitic plants do not always parasitize potentially suitable hosts requires a better understanding of the constraints that limit host use by parasitic plants. In Texas salt marshes, the parasitic plant Cuscuta indecora rarely parasitizes three hos...

journal_title：Oecologia

authors： Marquardt ES,Pennings SC

更新日期：2010-09-01 00:00:00

abstract：:The co-occurrence of several species, all of which share similar resource requirements, remains a paradox in ecology. Here, I evaluated resource use along multiple environmental axes to understand the potential for niche partitioning and complementarity in a guild of suspension-feeding rocky shore invertebrates. I foc...

journal_title：Oecologia

authors： Bracken MES

更新日期：2020-06-01 00:00:00

abstract：:Using resource selection functions, we examined habitat selection patterns of barren-ground grizzly bears (Ursus arctos) in the central Canadian Arctic among and within home ranges. There was no difference between the sexes with regard to habitat selection patterns at the home range level (Wilks' λ, approx. F 11,11=1....

journal_title：Oecologia

authors： McLoughlin PD,Case RL,Gau RJ,Cluff DH,Mulders R,Messier F

更新日期：2002-06-01 00:00:00

abstract：:Competition and facilitation are both considered major factors affecting the structure of plant assemblages, yet few studies have quantified positive, negative, and net effects simultaneously. In this study, we investigated the positive, negative, and net effects of tree saplings on the encroachment of two tree specie...

journal_title：Oecologia

authors： Kennedy PG,Sousa WP

更新日期：2006-06-01 00:00:00

abstract：:Female ornaments are present in many species, and it is more and more accepted that sexual or social selection may lead to their evolution. By contrast, the information conveyed by female ornaments is less well understood. Here, we investigated the links between female ornaments and maternal effects. In birds, an impo...

journal_title：Oecologia

authors： Midamegbe A,Grégoire A,Staszewski V,Perret P,Lambrechts MM,Boulinier T,Doutrelant C

更新日期：2013-10-01 00:00:00

abstract：:Mistletoes constitute instructive study cases with which to address the role of generalist consumers in the study of plant-animal interactions. Their ranges of safe sites for recruitment are among the most restricted of any plant; therefore, frugivores specializing in mistletoe have been considered almost indispensabl...

journal_title：Oecologia

authors： Mellado A,Zamora R

更新日期：2014-09-01 00:00:00

abstract：:The response of an Australian arid-zone gecko community to sulphur dioxide and salt spray from a mine and industrial site was investigated from 1992 to 1995. Geckos were abundant and fecund at control sites in chenopod shrubland and annual capture rates were strongly influenced by minimum night temperatures. Capture r...

journal_title：Oecologia

authors： Read JL

更新日期：1998-04-01 00:00:00

abstract：:Relationships between fine root growth, rates of litter decomposition and nutrient release were analysed in a mixed forest on Tierra Firme, a Tall Amazon Caatinga and a Low Bana on podsolized sands near San Carlos de Rio Negro. Fine root growth in the upper soil layers (root mat+10 cm upper soil) was considerably high...

journal_title：Oecologia

authors： Cuevas E,Medina E

更新日期：1988-07-01 00:00:00

abstract：:Moths eclosed earlier from pupae of the bertha armyworm,Mamestra configurata, that were exposed briefly (1 to 5 days) to a warm temperature (15 or 20°C) at the beginning of postdiapause pupal-adult metamorphosis and then incubated at 10 or 12.5°C than from pupae incubated at 10 or 12.5°C throughout metamorphosis. The ...

journal_title：Oecologia

authors： Turnock WJ,Bodnaryk RP,Abramson D

更新日期：1986-09-01 00:00:00

abstract：:The hypothesis that carnivorous plants are less responsive to prey at high soil nutrient levels than at lower levels (Givnish et al. 1984) is tested on four plant species (Drosera rotundifolia, Pinguicula alpina, P. villosa and P. vulgaris) from a subarctic environment. The response, measured in terms of seven charact...

journal_title：Oecologia

authors： Karlsson PS,Nordell KO,Carlsson BÅ,Svensson BM

更新日期：1991-03-01 00:00:00

abstract：:The dynamics of vegetative and reproductive growth were compared in matched pairs of Mediteranean and desert populations of three unrelated annual species, Erucaria hispanica (L.) Druce, Brachypodium distachyon (L.) Beauv. and Bromus fasciculatus C. Presl., under high and low levels of water availability in a common-e...

journal_title：Oecologia

authors： Aronson J,Kigel J,Shmida A,Klein J

更新日期：1992-01-01 00:00:00

abstract：:The spatial distributions of selected soil properties in two adjacent sites in southwest Michigan were examined to evaluate the potential effects of chronic disturbance on resource heterogeneity. One site was a cultivated field that had been cleared, plowed, and cropped annually for decades prior to sampling while the...

journal_title：Oecologia

authors： Robertson GP,Crum JR,Ellis BG

更新日期：1993-12-01 00:00:00

abstract：:Nectar plant utilization by butterflies was compared with the abundance of flowering plants on some SW Swedish meadows. The transportation of pollen grains by individual butterflies was analysed using a scanning electron microscope.For the majority of plant species, butteflies were of minor importance as pollinators. ...

journal_title：Oecologia

authors： Jennersten O

更新日期：1984-07-01 00:00:00

abstract：:Tropical ferns are characterized by a high diversity of plant life forms, yet there have been few large-scale studies on the functional ecology of these different forms. We examined epiphytic, hemiepiphytic, and terrestrial ferns, and asked whether there are differences in the mineral nutrition and water relations acr...

journal_title：Oecologia

authors： Watkins JE Jr,Rundel PW,Cardelús CL

更新日期：2007-08-01 00:00:00

abstract：:Herbivore-induced defences appear ubiquitous across most biomes and habitats. Yet the direct correlation between induced changes in host plant chemistry and the population dynamics of the herbivore remain untested in many systems. In plant-herbivore interactions in the terrestrial environment, indirect or tritrophic i...

journal_title：Oecologia

authors： Coleman RA,Ramchunder SJ,Davis KM,Moody AJ,Foggo A

更新日期：2007-03-01 00:00:00

abstract：:Several components of the diversity of plant communities, such as species richness, species composition, number of functional groups and functional composition, have been shown to directly affect the performance of exotic species. Exotics can also be affected by herbivores of the native plant community. However, these...

journal_title：Oecologia

authors： Prieur-Richard AH,Lavorel S,Linhart YB,Dos Santos A

更新日期：2002-01-01 00:00:00

abstract：:The amount of calcium in Eucalyptus diversicolor (karri) ecosystems is high in comparison with other eucalypt forest ecosystems in Australia. A large proportion of this calcium is present as crystalline Ca oxalate. Whewellite (CaC2O4·H2O) accumulates in leaf tissue of the over- and understorey species. Up to 70% of th...

journal_title：Oecologia

authors： O'Connell AM,Malajczuk N,Gailitis V

更新日期：1983-02-01 00:00:00