Influence of forest type and tree species on canopy ants (Hymenoptera: Formicidae) in Budongo Forest, Uganda.

abstract：:Life history changes may change resource use. Such shifts are not well understood in the dung beetles, despite recognised differences in larval and adult feeding ability. We use the flightless dung beetle Circellium bacchus to explore such shifts, identifying dung sources of adults using DNA metabarcoding, and compari...

journal_title：Oecologia

authors： Kerley GIH,Landman M,Ficetola GF,Boyer F,Bonin A,Rioux D,Taberlet P,Coissac E

更新日期：2018-09-01 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：:Canopy CO2 concentrations in a tropical rainforest in French Guiana were measured continuously for 5 days during the 1994 dry season and the 1995 wet season. Carbon dioxide concentrations ([CO2]) throughout the canopy (0.02-38 m) showed a distinct daily pattern, were well-stratified and decreased with increasing heigh...

journal_title：Oecologia

authors： Buchmann N,Guehl JM,Barigah TS,Ehleringer JR

更新日期：1997-03-01 00:00:00

abstract：:The diurnal periodicity of emergence of several stonefly and mayfly species was studied on the shore of lake Mondsee, Austria. Nemoura cinerea (Plecoptera) emerges during the whole day with peaks in the morning and afternoon. The Ephemeroptera Leptophlebia marginata, Ephemera danica and Centroptilum luteolum emerge as...

journal_title：Oecologia

authors： Thomas E

更新日期：1969-08-01 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：:Global climate change is expected to affect terrestrial ecosystems in a variety of ways. Some of the more well-studied effects include the biogeochemical feedbacks to the climate system that can either increase or decrease the atmospheric load of greenhouse gases such as carbon dioxide and nitrous oxide. Less well-stu...

journal_title：Oecologia

authors： Butler SM,Melillo JM,Johnson JE,Mohan J,Steudler PA,Lux H,Burrows E,Smith RM,Vario CL,Scott L,Hill TD,Aponte N,Bowles F

更新日期：2012-03-01 00:00:00

abstract：:The impacts of climatic change on organisms depend on the interaction of multiple stressors and how these may affect the interactions among species. Consumer-prey relationships may be altered by changes to the abundance of either species, or by changes to the per capita interaction strength among species. To examine t...

journal_title：Oecologia

authors： Poore AG,Graba-Landry A,Favret M,Sheppard Brennand H,Byrne M,Dworjanyn SA

更新日期：2013-11-01 00:00:00

abstract：:Although plant growth is generally recognized to be influenced by allocation to defense, genetic background (e.g., inbreeding), and gender, rarely have those factors been addressed collectively. In quaking aspen (Populus tremuloides Michx.), phenolic glycosides (PGs) and condensed tannins (CTs) constitute up to 30 % o...

journal_title：Oecologia

authors： Cole CT,Stevens MT,Anderson JE,Lindroth RL

更新日期：2016-06-01 00:00:00

abstract：:Despite the abundance of studies on competitive interactions, relatively few experiments have been used to fit explicit competition models and estimate competition coefficients. Such estimates are valuable for making contact between theoretical and empirical studies, which tend to measure competition in different unit...

journal_title：Oecologia

authors： Inouye BD

更新日期：1999-09-01 00:00:00

abstract：:The transition between wintertime net carbon loss and springtime net carbon assimilation has an important role in controlling the annual rate of carbon uptake in coniferous forest ecosystems. We studied the contributions of springtime carbon assimilation to the total annual rate of carbon uptake and the processes invo...

journal_title：Oecologia

authors： Monson RK,Sparks JP,Rosenstiel TN,Scott-Denton LE,Huxman TE,Harley PC,Turnipseed AA,Burns SP,Backlund B,Hu J

更新日期：2005-11-01 00:00:00

abstract：:Relationships between leaf traits and the gap dependence for regeneration, and ontogenetic changes therein, were investigated in juvenile and adult tropical rainforest tree species. The juveniles of the 17 species included in the study were grown in high light, similar to the exposed crowns of the adult trees. The tra...

journal_title：Oecologia

authors： Houter NC,Pons TL

更新日期：2012-05-01 00:00:00

abstract：:Herbivory can reduce plant fitness, and its effects can be increased by competition. Though numerous studies have examined the joint effects of herbivores and competitors on plant performance, these interactive effects are seldom considered in the context of plant invasions. Here, we examined variation in plant perfor...

journal_title：Oecologia

authors： Huang W,Carrillo J,Ding J,Siemann E

更新日期：2012-10-01 00:00:00

abstract：:Plants in the Mediterranean climate region of California typically experience summer drought conditions, but correlations between zones of frequent coastal fog inundation and certain species' distributions suggest that water inputs from fog may influence species composition in coastal habitats. We sampled the stable H...

journal_title：Oecologia

authors： Corbin JD,Thomsen MA,Dawson TE,D'Antonio CM

更新日期：2005-10-01 00:00:00

abstract：:Early models of hostplant exploitation by phytophagous insects suffer from unwarranted assumptions and may not be generally applicable. Wordmodels of the co-evolutionary approach may assume unwarranted evolutionary stability in 'strategic' explanations, whilst mathematical models derived from earlier optimal-diet stud...

journal_title：Oecologia

authors： Courtney SP

更新日期：1982-01-01 00:00:00

abstract：:Global biodiversity is threatened by multiple anthropogenic stressors but little is known about the combined effects of environmental warming and invasive species on ecosystem functioning. We quantified thermal preferences and then compared leaf-litter processing rates at eight different temperatures (5.0-22.5 °C) by ...

journal_title：Oecologia

authors： Kenna D,Fincham WN,Dunn AM,Brown LE,Hassall C

更新日期：2017-03-01 00:00:00

abstract：:Many animals have seasonally plastic diets to take advantage of seasonally abundant plant resources, such as fruit or nectar. Switches from insectivorous diets that are protein rich to fruits or nectar that are carbohydrate rich present physiological challenges, but are routinely done by insectivorous songbirds during...

journal_title：Oecologia

authors： Frick WF,Shipley JR,Kelly JF,Heady PA 3rd,Kay KM

更新日期：2014-01-01 00:00:00

abstract：:Semi-arid ecosystems are strongly water-limited and typically quite responsive to changes in precipitation amount and event size. In the C4-dominated shortgrass steppe of the Central US, previous experiments suggest that large rain events more effectively stimulate plant growth and aboveground net primary production (...

journal_title：Oecologia

authors： Post AK,Knapp AK

更新日期：2019-11-01 00:00:00

abstract：:The decision how to allocate marginal resources to reproduction and growth can have important effects on associated life-history parameters as well as on population dynamics. In addition to showing variation among individuals in a population, such allocation rules may be either condition-dependent or fixed in differen...

journal_title：Oecologia

authors： Lardner B,Loman J

更新日期：2003-12-01 00:00:00

abstract：:The mycobiont of the high-light-susceptible forest lichen Lobaria pulmonaria was shown to deposit brown, melanic compounds in the outer layer of the upper cortex, depending on the long-term level of solar radiation in its natural habitat. Furthermore, pale thalli from a shady habitat produced melanic compounds after t...

journal_title：Oecologia

authors： Gauslaa Y,Solhaug KA

更新日期：2001-02-01 00:00:00

abstract：:Stemflow inputs of magnesium and potassium were measured from 57 canopy trees representing eight species under heavy rainfall conditions in two tropical forest sites in northeast Queensland, Australia. In the premontane tropical moist forest site on the Atherton Tableland, the stemflow input per unit trunk basal area ...

journal_title：Oecologia

authors： Herwitz SR

更新日期：1986-10-01 00:00:00

abstract：:The population dynamics of snowshoe hares (Lepus americanus) are fundamental to the ecosystem dynamics of Canada's boreal forest. During the 8- to 11-year population cycle, hare densities can fluctuate up to 40-fold. Predators in this system (lynx, coyotes, great-horned owls) affect population numbers not only through...

journal_title：Oecologia

authors： Lavergne SG,McGowan PO,Krebs CJ,Boonstra R

更新日期：2014-11-01 00:00:00

abstract：:Eggs of the elm leaf beetle Xanthogaleruca luteola are often heavily attacked by the chalcidoid wasp Oomyzus gallerucae. We studied the chemical signals mediating interactions between the egg parasitoid, its host, and the plant Ulmus campestris. Olfactometer bioassays with O. gallerucae showed that volatiles of the ho...

journal_title：Oecologia

authors： Meiners T,Hilker M

更新日期：1997-09-01 00:00:00

abstract：:Field evidence indicates that adult microtines, especially females, may be a major cause of poor juvenile survival and this may be instrumental in their population regulation. This suggests that males and females behave differently towards young animals. To examine how adult males, nonlactating females, and lactating ...

journal_title：Oecologia

authors： Boonstra R

更新日期：1984-04-01 00:00:00

abstract：:The responses of Polygonum pensylvanicum L., an early successional annual, and of Polygonum virginianum L., a late successional perennial, were examined along discontinuous gradients of soil moisture, light and nutrient availability. In the case of P. virginianum both individuals grown from seed and individuals grown ...

journal_title：Oecologia

authors： Lee HS,Zangerl AR,Garbutt K,Bazzaz FA

更新日期：1986-03-01 00:00:00

abstract：: Fluorogenic substrate analogues (MUF substrates) are very sensitive in detecting hydrolytic enzymes. This method was adapted for the quantitative analysis of extracellular enzymes in snails and other animals. It was then used to determine cellobiase, chitobiase, protease, esterase, phosphatase and lipase in the diges...

journal_title：Oecologia

authors： Brendelberger H

更新日期：1996-12-01 00:00:00

abstract：:We examined the effects of intraguild predation (IGP) and interference competition on an endangered dragonfly, Aeshna viridis Eversm. (Odonata: Anisoptera). A. viridis is rare in Europe due to the decrease in suitable habitats harboring the macrophyte Stratiotes aloides L. Stratiotes plants are the principal ovipositi...

journal_title：Oecologia

authors： Suutari E,Rantala MJ,Salmela J,Suhonen J

更新日期：2004-06-01 00:00:00

abstract：:Resprouting is the main regeneration mechanism after fire in Mediterranean-type ecosystems. Herbivores play an important role in controlling postfire seedling establishment, but their influence on regeneration by resprouting is less well known. To study the effects of fire intensity on resprouting of Adenostoma fascic...

journal_title：Oecologia

authors： Moreno JM,Oechel WC

更新日期：1991-01-01 00:00:00

abstract：:The diurnal course of the xylem water flow in a solitary Salix fragilis L. tree in a wet grassland was measured using the tissue heat-balance method. There was considerable variation due to meteorological factors. Maximum flow rate was 0.4 kg h-1 m-2 of crown projection area, or 5.9 kg h-1 kg-1 leaf dry weight. The da...

journal_title：Oecologia

authors： Čermák J,Jeník J,Kučera J,Žídek V

更新日期：1984-10-01 00:00:00

abstract：:The leaves of Cymopterus longipes form prostrate rosettes early in the spring. As the weather warms, these leaves are elevated on a pseudoscape (false stem) which develops below the rosette through the elongation of the caudex (in the region between root and shoot). The effect of this growth form change on the water r...

journal_title：Oecologia

authors： Werk KS,Ehleringer J,Harley PC

更新日期：1986-06-01 00:00:00

abstract：:The turnover of plant biomass largely determines the amount of energy flowing through an ecosystem and understanding the processes that regulate turnover has been of interest to ecologists for decades. Leaf life span theory has proven useful in explaining patterns of leaf turnover in relation to resource availability,...

journal_title：Oecologia

authors： Rodriguez GE,Reed DC,Holbrook SJ

更新日期：2016-10-01 00:00:00