Factors affecting oxygen consumption in the woodlouse Porcellio scaber latr.

abstract：:One hypothesis for amphibian declines is that increased dryness attributed to global climate change exposes amphibians to greater biotic threat and, consequently, greater mortality. But, little is known about behavioral responses of terrestrial amphibians to dry conditions alone or in combination with biotic threats. ...

journal_title：Oecologia

authors： Rohr JR,Madison DM

更新日期：2003-05-01 00:00:00

abstract：:A series of seventeen plant extracts rich in phenolic materials, including condensed and hydrolysable tannins, have been subjected to a series of chemical analyses in an attempt to gather ecologically significant information about their structure. Procedures investigated were (i) the Folin-Denis and Hagerman and Butle...

journal_title：Oecologia

authors： Mole S,Waterman PG

更新日期：1987-04-01 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：:A rich mammalian fauna is found on islands that lie on the Sunda Shelf, a continental shelf extending from Vietnam to Borneo and Java that was periodically exposed as dry land during the Pleistocene. The correlation between log of island area and number of species is high (r 2=0.94); the slope of the curve is moderate...

journal_title：Oecologia

authors： Heaney LR

更新日期：1984-01-01 00:00:00

abstract：:Although predator avoidance has been proposed as one possible factor influencing the distribution of fish among substrate types, no study has addressed this question directly. Groups of juvenile Atlantic cod were offered a choice between pairs of the following three substrates: sand, gravel-pebble and cobble. Their di...

journal_title：Oecologia

authors： Gotceitas V,Brown JA

更新日期：1993-02-01 00:00:00

abstract：:Short-term responses of producers highlight that key nutrients (e.g., N, P)-or combinations of these nutrients-limit primary production in aquatic and terrestrial ecosystems. These discoveries continue to provide highly valuable insights, but it remains important to ask whether nutrients always predominantly limit pro...

journal_title：Oecologia

authors： Darcy-Hall TL,Hall SR

更新日期：2008-04-01 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：:The ecological overlap of three species of Hawaiian Drosophila: D. mimica D. kambysellisi, and D. imparisetae, has been investigated by analysis of the community matrix. The basic model is a Lotka-Volterra formulation, suitably expanded to include sexual dimorphism. We have also investigated equilibrium population siz...

journal_title：Oecologia

authors： Richardson RH,Smouse PE

更新日期：1975-03-01 00:00:00

abstract：:The species composition of vesicular-arbuscular mycorrhizal (VAM) fungal communities changed during secondary succession of abandoned fields based on a field to forest chronosequence. Twenty-five VAM fungal species were identified. Seven species were clearly early successional and five species were clearly late succes...

journal_title：Oecologia

authors： Johnson NC,Zak DR,Tilman D,Pfleger FL

更新日期：1991-05-01 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：:Variation in plant resistance to pathogen infection is commonly observed in interactions between wild plants and their foliar pathogens. Models of host-pathogen interactions indicate that a large cost of infection is generally necessary to maintain this variation, yet there is limited evidence that foliar pathogens ca...

journal_title：Oecologia

authors： Goss EM,Bergelson J

更新日期：2007-05-01 00:00:00

abstract：:The tadpoles of two anuran species, Rana sylvatica and Xenopus laevis, were fed various concentrations of two algae, Anabaena sphaerica (large filaments) and Chlorella pyrenoidosa (small unicells). Filtering rates were measured indirectly with a Coulter Counter system; buccal pumping rates were observed directly.Exper...

journal_title：Oecologia

authors： Seale DB,Wassersug RJ

更新日期：1979-01-01 00:00:00

abstract：:The arboreal ant fauna was investigated in Budongo Forest, a seasonal rain forest in Uganda, using the insecticidal fogging technique. Ants were collected from 61 trees, between 7 and 33 m in height, belonging to four tree species. Trees were growing in adjacent plots of forests characterized by different use and stru...

journal_title：Oecologia

authors： Schulz A,Wagner T

更新日期：2002-10-01 00:00:00

abstract：:This study quantified both the age- and sex-specific survival rates of juveniles and adults, and tested for interannual differences in age-specific survival rates of the southern elephant seal population at Marion Island. Pups were tagged on an annual basis from 1983 onwards at Marion Island, and a consistent recaptur...

journal_title：Oecologia

authors： Pistorius PA,Bester MN,Kirkman SP

更新日期：1999-11-01 00:00:00

abstract：:Investigating how prey density influences a prey's combined predation risk from multiple predator species is critical for understanding the widespread importance of multiple predator effects. We conducted experiments that crossed six treatments consisting of zero, one, or two predator species (hellgrammites, greenside...

journal_title：Oecologia

authors： Vance-Chalcraft HD,Soluk DA

更新日期：2005-07-01 00:00:00

abstract：:Adaptations to aridity of the reedfrog Hyperolius viridiflavus nitidulus, living in different parts of the season-ally very dry and hot West African savanna, are investigated. 1. During the dry season mainly juveniles (weighing 200-600 mg) were found in the field. A very low rate of evaporative water loss (EWL; about ...

journal_title：Oecologia

authors： Geise W,Linsenmair KE

更新日期：1986-03-01 00:00:00

abstract：:Measurements were made of the photosynthetic gas exchange properties and water use efficiency of 19 species of mangrove in 9 estuaries with different salinity and climatic regimes in north eastern Australia and Papua New Guinea. Stomatal conductance and CO2 assimilation rates differed significantly between species at ...

journal_title：Oecologia

authors： Clough BF,Sim RG

更新日期：1989-04-01 00:00:00

abstract：:Climate change has been shown to affect the timing of reproduction, with earlier reproduction being associated with an increase in temperature. Changes in the timing of reproduction arise from changes in food availability as well as other factors, and differences in the timing of reproduction among sites may cause sit...

journal_title：Oecologia

authors： Møller AP

更新日期：2008-04-01 00:00:00

abstract：:The impact of the xylem-tapping mistletoe Phoradendron juniperinum on the nitrogen and water relations of its host Juniperus osteosperma was investigated under natural field conditions. Leaf conductance, leaf water potential, and leaf Kjeldahl nitrogen contents were followed through the growing season on mistletoes, i...

journal_title：Oecologia

authors： Ehleringer JR,Cook CS,Tieszen LL

更新日期：1986-01-01 00:00:00

abstract：:Ectomycorrhizal (EM) fungi form relationships with higher plants; plants transfer C to fungi, and fungi transfer nutrients to their host. While evidence indicates that this interaction is largely mutualistic, less is known about how nutrient supply and EM associates may alter C and nutrient exchanges, especially in in...

journal_title：Oecologia

authors： Albarracín MV,Six J,Houlton BZ,Bledsoe CS

更新日期：2013-12-01 00:00:00

abstract：:The rapid and often remote location of suitable habitats used by migrating organisms is often critical to their subsequent recruitment, fitness and survival, and this includes in the marine environment. However, for the non-feeding post-larval stage of spiny lobsters, effective settlement cues for habitat selection ar...

journal_title：Oecologia

authors： Stanley JA,Hesse J,Hinojosa IA,Jeffs AG

更新日期：2015-07-01 00:00:00

abstract：:Vallisneria americana was grown for six weeks in a greenhouse on relatively fertile sediment to test for factors other than nutrient limitation which may slow growth of this submersed macrophyte at pH 5. On the basis of dry mass accumulated, (1) low pH significantly depressed Vallisneria growth at constant free CO2 le...

journal_title：Oecologia

authors： Titus JE,Feldman RS,Grisé D

更新日期：1990-10-01 00:00:00

abstract：:Climate-mediated shifts in species' phenologies are expected to alter species interactions, but predicting the consequences of this is difficult because phenological shifts may be driven by different climate factors that may or may not be correlated. Temperature could be an important factor determining effects of phen...

journal_title：Oecologia

authors： Rudolf VH,Singh M

更新日期：2013-11-01 00:00:00

abstract：:Although cascading effects of top predators can help structure communities, their influence may vary across habitats that differentially protect prey. Therefore, to understand how and to what degree habitat complexity can affect trophic interactions in adjacent habitats, we used a combination of a broad regional-scale...

journal_title：Oecologia

authors： Byers JE,Holmes ZC,Malek JC

更新日期：2017-09-01 00:00:00

abstract：:I tested hypotheses for ecological roles of storage carbohydrates in perennating organs (roots and branches) of alpine Oxytropis sericea, a leguminous herb. In naturally growing plants, total nonstructural carbohydrates achieved their maximal concentration in the fall, declined during winter, and reached minimal level...

journal_title：Oecologia

authors： Wyka T

更新日期：1999-08-01 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：:Male dragonflies of the species Aeschna cyanea pay several visits per day to a suitable pond in search of mates. The influence of the population density upon the daily duration of presence of single dragonfly males was investigated by means of multiple regression analysis. Several environmental factors were also consi...

journal_title：Oecologia

authors： Kaiser H

更新日期：1974-12-01 00:00:00

abstract：:In the laboratory the consumption (C), egestion (F), assimilation (A) and assimilation efficiency (A/C) of dry matter and of the bioelements C, N, P, K, Ca, Mg, S and Na were studied weekly during the whole feeding stage. The larvae were reared in clusters of 10 individuals (on average 3.5 ♂♂ and 6.5 ♀♀), fed one-year...

journal_title：Oecologia

authors： Larsson S,Tenow O

更新日期：1979-11-01 00:00:00

abstract：:Spatial variation in biotic interactions and natural selection are fundamental parts of natural systems, and can be driven by differences in both trait distributions and the local environmental context of the interaction. Most studies of plant-animal interactions have been performed only in natural settings, making it...

journal_title：Oecologia

authors： König MA,Wiklund C,Ehrlén J

更新日期：2014-04-01 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