Cannibalism in the red wood ant, Formica polyctena (Hymenoptera: formicidae).

abstract：:The effects of fertilization on leaf longevity and leaf mortality in the Alaskan evergreen shrub, Ledum palustre (Ait.) Hult., were investigated in a field experiment. The fertilization treatments included N alone, P alone, N plus P, and N plus P plus K. After 5 years all treatments had the same effect on leaf longevi...

journal_title：Oecologia

authors： Shaver GR

更新日期：1983-02-01 00:00:00

abstract：:Most animals metamorphose, changing morphology, physiology, behavior and ecological interactions. Size- and habitat-dependent mortality risk is thought to affect the evolution and plastic expression of metamorphic timing, and high predation during the morphological transition is posited as a critical selective force s...

journal_title：Oecologia

authors： Touchon JC,Jiménez RR,Abinette SH,Vonesh JR,Warkentin KM

更新日期：2013-11-01 00:00:00

abstract：:We examined how independent and interactive effects of CO2 concentrations, water supply and wind speed affect growth rates, biomass partitioning, water use efficiency, diffusive conductance and stomatal density of plants. To test the prediction that wind stress will be ameliorated by increased CO2 and/or by unrestrict...

journal_title：Oecologia

authors： Retuerto R,Woodward FI

更新日期：1993-06-01 00:00:00

abstract：:The rates at which bumblebees of different proboscis lengths forage on flowers of a series of corolla tube lengths were determined. The results indicate significant correlations between proboscis length and time spent by bees on flowers. Bumblebees of long proboscis length can forage significantly faster than bees of ...

journal_title：Oecologia

authors： Inouye DW

更新日期：1980-05-01 00:00:00

abstract：:Home range data were collected concurrently from four syntopic browsing ruminant species in a conserved savanna ecosystem. Mean home range areas were: giraffe (Giraffa camelopardalis) 282 km2; kudu (Tragelaphus strepsiceros) 21.9 km2; impala (Aepyceros melampus) 5.82 km2; steenbok (Raphicerus campestris) 0.62 km2. Hom...

journal_title：Oecologia

authors： du Toit JT

更新日期：1990-12-01 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：:Disturbance may play an important role in generating patterns of abundance and distribution of biotic assemblages, particularly if its impact differs among habitat patches. Despite much speculation concerning the probable importance of spatial variation in the response of stream fauna to flooding, empirical work on pa...

journal_title：Oecologia

authors： Palmer MA,Arensburger P,Martin AP,Denman DW

更新日期：1996-01-01 00:00:00

abstract：:With the increasing imperative for societies to act to curb climate change by increasing carbon stores and sinks, it has become critical to understand how organic carbon is produced, released, transformed, transported, and sequestered within and across ecosystems. In freshwater and open-ocean systems, shredders play a...

journal_title：Oecologia

authors： Filbee-Dexter K,Pedersen MF,Fredriksen S,Norderhaug KM,Rinde E,Kristiansen T,Albretsen J,Wernberg T

更新日期：2020-01-01 00:00:00

abstract：:Laboratory feeding experiments were conducted with Dipodomys ordii and Perognathus flavus in an attempt to discover a mechanism which might result in seed size selection. There was no marked difference in the proportions of four seed types collected whether the rodents foraged in the presence or absence of one another...

journal_title：Oecologia

authors： Hutto RL

更新日期：1978-01-01 00:00:00

abstract：:In this study we assessed the effectiveness of rodents as dispersers of Quercus ilex in a patchy landscape in southeastern Spain. We experimentally followed the fates of 3,200 marked and weighed acorns from dispersal through the time of seedling emergence over three years. Rodents handled about 99% of acorns, and disp...

journal_title：Oecologia

authors： Gómez JM,Puerta-Piñero C,Schupp EW

更新日期：2008-03-01 00:00:00

abstract：:We compared movement patterns and rhythms of activity of a top predator, the Iberian lynx Lynx pardinus, a mesopredator, the red fox Vulpes vulpes, and their shared principal prey, the rabbit Oryctolagus cuniculus, in relation to moon phases. Because the three species are mostly nocturnal and crepuscular, we hypothesi...

journal_title：Oecologia

authors： Penteriani V,Kuparinen A,del Mar Delgado M,Palomares F,López-Bao JV,Fedriani JM,Calzada J,Moreno S,Villafuerte R,Campioni L,Lourenço R

更新日期：2013-11-01 00:00:00

abstract：:Although ecological disturbances can have a strong influence on pollinators through changes in habitat, virtually no studies have quantified how characteristics of wildfire influence the demography of essential pollinators. Nevertheless, evaluating this topic is critical for understanding how wildfire is linked to pol...

journal_title：Oecologia

authors： Galbraith SM,Cane JH,Rivers JW

更新日期：2021-01-03 00:00:00

abstract：:Successful reproduction in a seasonal environment can be accomplished with resources that are stored before use ("capital resources") or resources that are used immediately ("income resources"). Research examining capital versus income resource usage during reproduction has primarily focused on assigning species to po...

journal_title：Oecologia

authors： Fletcher QE,Landry-Cuerrier M,Boutin S,McAdam AG,Speakman JR,Humphries MM

更新日期：2013-12-01 00:00:00

abstract：:Why can alien species succeed in environments to which they have had no opportunity to adapt and even become more abundant than many native species? Ecological theory suggests two main possible answers for this paradox: competitive superiority of exotic species over native species and opportunistic use of ecological o...

journal_title：Oecologia

authors： Sol D,Bartomeus I,Griffin AS

更新日期：2012-06-01 00:00:00

abstract：:With multiple species introductions and rapid global changes, there is a need for comprehensive invasion models that can predict community responses. Evidence suggests that abiotic constraint, propagule pressure, and biotic resistance of resident species each determine plant invasion success, yet their interactions ar...

journal_title：Oecologia

authors： Byun C,de Blois S,Brisson J

更新日期：2015-05-01 00:00:00

abstract：:Tree-ring records can provide valuable information to advance our understanding of contemporary terrestrial carbon cycling and to reconstruct key metrics in the decades preceding monitoring data. The growing use of tree rings in carbon-cycle research is being facilitated by increasing recognition of reciprocal benefit...

journal_title：Oecologia

authors： Babst F,Alexander MR,Szejner P,Bouriaud O,Klesse S,Roden J,Ciais P,Poulter B,Frank D,Moore DJ,Trouet V

更新日期：2014-10-01 00:00:00

abstract：:The great majority of Eucalyptus spp. are facultative resprouters, and they dominate the eucalypt forests of Australia. Despite this numeric and geographic dominance, there is a general lack of knowledge of their capacity for carbon capture and water loss during canopy reinstation. After a crown-removing fire, we meas...

journal_title：Oecologia

authors： Turnbull TL,Buckley TN,Barlow AM,Adams MA

更新日期：2014-10-01 00:00:00

abstract：:Daily energy metabolism and water flux were measured with doubly labeled water in the free-living insectivorous lizards Cnemidophorus tigris (mean body mass 15.7 g) and Callisaurus draconoides (8.6 g) in June 1979 in the Colorado Desert of California. C. tigris was an active forager; it spent 91% of its 5-h daily acti...

journal_title：Oecologia

authors： Anderson RA,Karasov WH

更新日期：1981-05-01 00:00:00

abstract：:The response to a single defoliation was studied on three clones of Themeda triandra collected in the short, mid, and tall grassland regions of the Serengeti National Park (Tanzania). These sites represent a gradient of decreasing grazing intensity. Growth, allocation pattern, and several morphometric traits were moni...

journal_title：Oecologia

authors： Oesterheld M,McNaughton SJ

更新日期：1988-11-01 00:00:00

abstract：:We examined how different exploratory behavioral types of largemouth bass responded to differing prey communities by determining effects on growth, survival and diet in experimental ponds. We found evidence that non-explorer largemouth bass target young-of-year bluegill early on in life, but bluegill were not an impor...

journal_title：Oecologia

authors： Nannini MA,Wahl DH

更新日期：2016-10-01 00:00:00

abstract：:The responses of organisms to organic farming depend on the taxonomic group and landscape complexity. Following the intermediate landscape complexity hypothesis, organic farming can compensate for the lack of complexity in simple landscapes. Argentinian farmlands are simple with large fields and scarce linear habitat ...

journal_title：Oecologia

authors： Serafini VN,Coda JA,Contreras F,Conroy MJ,Gomez MD,Priotto JW

更新日期：2019-12-01 00:00:00

abstract：:The influence of ectoparasitic water mite larvae (Arrenurus) on the fluctuating asymmetry (FA) of forewing length and cell number in the foreweings of the damselfly Coenagrion puella has been investigated. We show a significant correlation between the FA of forewing length and the mite load. Most explanations for incr...

journal_title：Oecologia

authors： Bonn A,Gasse M,Rolff J,Martens A

更新日期：1996-12-01 00:00:00

abstract：:As the Arctic warms, tundra vegetation is becoming taller and more structurally complex, as tall deciduous shrubs become increasingly dominant. Emerging studies reveal that shrubs exhibit photosynthetic resource partitioning, akin to forests, that may need accounting for in the "big leaf" net ecosystem exchange models...

journal_title：Oecologia

authors： Boelman NT,Magney TS,Logan BA,Griffin KL,Eitel JU,Greaves H,Prager CM,Vierling LA

更新日期：2016-09-01 00:00:00

abstract：:Mycorrhizal fungi are crucial for the ecological success of land plants, providing their hosts with nutrients in exchange for organic C. However, not all plants are mycorrhizal, especially ferns, of which about one-third of the species lack this symbiosis. Because the mycorrhizal status is evolutionarily ancestral, th...

journal_title：Oecologia

authors： Kessler M,Güdel R,Salazar L,Homeier J,Kluge J

更新日期：2014-07-01 00:00:00

abstract：:By analogy with deterministic stability, the stability of stochastic ecological systems can be viewed as a tendency for population densities to avoid dynamic boundaries (i.e. boundedness) or to approach a dynamic attractor (i.e. attraction). At the population level, these two views generate predictions consistent with...

journal_title：Oecologia

authors： Crowley PH

更新日期：1992-05-01 00:00:00

abstract：:Populations of invasive species tend to have fewer parasites in their introduced ranges than in their native ranges and are also thought to have fewer parasites than native prey. This 'release' from parasites has unstudied implications for native predators feeding on exotic prey. In particular, shifts from native to e...

journal_title：Oecologia

authors： Locke SA,Bulté G,Marcogliese DJ,Forbes MR

更新日期：2014-05-01 00:00:00

abstract：:Ecosystem water-use efficiency (eWUE; the ratio of net ecosystem productivity to evapotranspiration rate) is a complex landscape-scale parameter controlled by both physical and biological processes occurring in soil and plants. Leaf WUE (lWUE; the ratio of leaf CO(2) assimilation rate to transpiration rate) is control...

journal_title：Oecologia

authors： Monson RK,Prater MR,Hu J,Burns SP,Sparks JP,Sparks KL,Scott-Denton LE

更新日期：2010-02-01 00:00:00

abstract：:The acetylene reduction method was used to measure nitrogen fixation in the phyllosphere of attached leaves of different phorophytes under natural conditions in a premontane rain forest in Costa Rica. Maximum rates of nitrogen fixation (26 ng N · cm-2 leaf area · h-1) - mainly due to the activity of two species of Scy...

journal_title：Oecologia

authors： Freiberg E

更新日期：1998-11-01 00:00:00

abstract：:1.) The daily ration required to maintain a population growth rate, r m, of zero (threshold ration) increased with increasing Asplanchna body mass. This relationship is described by the equation T=0.342 W0.797 where T=threshold ration (μg day-1 dry mass) and W=Asplanchna body mass (μg adult-1 dry mass). 2.) The thresh...

journal_title：Oecologia

authors： Stemberger RS,Gilbert JJ

更新日期：1984-11-01 00:00:00

abstract：:The importance of positive interspecific interactions within physically stressful habitats has received increased attention from community ecologists. The exposed sandy beach is an example of a physically rigorous environment where biological interactions have long been considered insignificant. We examined the intera...

journal_title：Oecologia

authors： Manning LM,Lindquist N

更新日期：2003-02-01 00:00:00