Phosotynthesis in hemiepiphytic species of Clusia and Ficus.

abstract：:The spatial context in which seed predation occurs may modify the spatial structure of recruitment generated by seed dispersal. The Janzen-Connell (J-C) model predicts that granivores will exert greater pressure on the parent plant or at those sites where the density of dispersed seeds is higher. We have investigated ...

journal_title：Oecologia

authors： Blendinger PG,Díaz-Vélez MC

更新日期：2010-06-01 00:00:00

abstract：:This study investigates the demography and interspecific interactions of 6 Heterohyrax brucei and 4 Procavia johnstoni populations, which inhabited 6 kopjes (rock outcrops) in the Serengeti National Park, Tanzania over a period of 17 years. On three kopjes (H1, O2 and PH2) both species lived sympatrically, while on th...

journal_title：Oecologia

authors： Hoeck HN

更新日期：1989-05-01 00:00:00

abstract：:Competition for space is an important process on tropical coral reefs. Few studies have examined the role sponges play in community structure despite the fact that many sponges are competitively superior to reef-building corals in space acquisition. Surveys conducted throughout the Florida Keys indicated that Chondril...

journal_title：Oecologia

authors： Hill MS

更新日期：1998-11-01 00:00:00

abstract：:Herbivore damage often deters pollinator visitation and many invasive plants in North America are pollinator-dependent. This has important implications for the biological control of invasive plants because it means that agents that deter pollinators may have a larger than expected impact on the plant. Yet interactions...

journal_title：Oecologia

authors： Swope SM

更新日期：2014-01-01 00:00:00

abstract：:Phenological synchrony between herbivorous insects and host plants is an important determinant of insect distribution and abundance. Non-native insects often experience novel climates, photoperiods, and host plants. How critical time periods of insect life cycles coincide with-or diverge from-phenological windows of h...

journal_title：Oecologia

authors： Ward SF,Moon RD,Herms DA,Aukema BH

更新日期：2019-08-01 00:00:00

abstract：:The mass loss of litter mixtures is often different than expected based on the mass loss of the component species. We investigated if the identity of neighbour species affects these litter-mixing effects. To achieve this, we compared decomposition rates in monoculture and in all possible two-species combinations of ei...

journal_title：Oecologia

authors： Hoorens B,Coomes D,Aerts R

更新日期：2010-02-01 00:00:00

abstract：:Mechanical aspects of predation by the shore crab, Carcinus maenas, on the edible mussel, Mytilus edulis, were examined. The shore crabs from the population studied utilized five distinct, largely size-related, mussel-opening techniques. Crushing the mussel umbone appeared the most successful opening method for medium...

journal_title：Oecologia

authors： Elner RW

更新日期：1978-01-01 00:00:00

abstract：:Arthropods and pathogens damage leaves in natural ecosystems and may reduce photosynthesis at some distance away from directly injured tissue. We quantified the indirect effects of naturally occurring biotic damage on leaf-level photosystem II operating efficiency (Phi(PSII)) of 11 understory hardwood tree species usi...

journal_title：Oecologia

authors： Aldea M,Hamilton JG,Resti JP,Zangerl AR,Berenbaum MR,Frank TD,Delucia EH

更新日期：2006-08-01 00:00:00

abstract：:In plagiotropic plants, axillary buds on the stolon can be exposed to low red:far-red (R:FR) ratios, while the leaves may be positioned in the uppermost layer of the sward where they are exposed to a high R:FR ratio. We tested whether the light environment of unfolded leaves influences outgrowth of the axillary buds a...

journal_title：Oecologia

authors： Lötscher M,Nösberger J

更新日期：1997-08-01 00:00:00

abstract：:Ant metapleural glands secrete surface antibiotics that affect pollen as well as bacteria and fungi. This may be one reason why ant pollination is rare. It is predicted that pollination by ants is possible only in the presence of certain ant and/or plant traits. Two traits are investigated; first, absence of the metap...

journal_title：Oecologia

authors： Peakall R,Angus CJ,Beattie AJ

更新日期：1990-10-01 00:00:00

abstract：:Studies that test community assembly hypotheses in observational communities frequently evaluate patterns for plots or entire communities, yet studies that examine assembly patterns across spatial scales show that they are greatly influenced by scale. Here, we test the spatial dependency of patterns of relatedness and...

journal_title：Oecologia

authors： Jin LS,Yin D,Fortin MJ,Cadotte MW

更新日期：2020-07-01 00:00:00

abstract：:The outflying and homeflying activity pattern of a colony of the Indian pygmy bat Pipistrellus mimus occupying a tunnel was studied under natural conditions. Before leaving the tunnel for foraging, the bats made circling flights outside to sample the environmental light conditions. The onset and end of activity was re...

journal_title：Oecologia

authors： Isaac SS,Marimuthu G

更新日期：1993-12-01 00:00:00

abstract：:Anthropogenic nitrogen deposition and projected increases in rainfall variability (the frequency of drought and heavy rainfall events) are expected to strongly influence ecosystem processes such as litter decomposition. However, how these two global change factors interact to influence litter decomposition is largely ...

journal_title：Oecologia

authors： Schuster MJ

更新日期：2016-03-01 00:00:00

abstract：:Dissolved O(2) is an important aquatic ecosystem health indicator. Metabolic and gas exchange (G) rates, which control O(2) concentration, are affected by nutrient loading and other environmental factors. Traditionally, aquatic metabolism has been reported as primary production:community respiration (P:R) ratios using...

journal_title：Oecologia

authors： Venkiteswaran JJ,Wassenaar LI,Schiff SL

更新日期：2007-08-01 00:00:00

abstract：:Nitrogen mineralization and net nitrification rates were 3-7 times greater in soil incubations from a girdled Liriodendron tulipifera (L.) stand than in a control stand. Neither litter nor root extracts had an inhibitory effect on nitrogen mineralization or nitrification rate. A lack of nitrification inhibitors also w...

journal_title：Oecologia

authors： Johnson DW,Edwards NT

更新日期：1979-01-01 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：:Many studies have shown that nonlethal predator effects such as trait-mediated interactions (TMIs) can have significant impacts on the structure and function of communities, but the role that environmental conditions play in modulating the scale and magnitude of these effects has not been carefully investigated. TMIs ...

journal_title：Oecologia

authors： Smee DL,Ferner MC,Weissburg MJ

更新日期：2008-05-01 00:00:00

abstract：:For many amphibians, high temperatures and limited precipitation are crucial habitat characteristics that limit species ranges and modulate life-history characteristics. Although knowledge of the ability of amphibians to cope with such environmental harshness is particularly relevant in the light of ongoing environmen...

journal_title：Oecologia

authors： Reniers J,Brendonck L,Roberts JD,Verlinden W,Vanschoenwinkel B

更新日期：2015-07-01 00:00:00

abstract：:Carbohydrate, lipid, and protein compositions are stoichiometrically related to organic CHN (carbon, hydrogen, nitrogen) contents. Elemental CHN analyses of total biomass and ash, therefore, provide a basis for the calculation of proximate biochemical composition and bomb caloric value. The classical nitrogen to prote...

journal_title：Oecologia

authors： Gnaiger E,Bitterlich G

更新日期：1984-06-01 00:00:00

abstract：:We performed a factorial combination of seed additions, surface soil disturbance, and protection from potential seed predation in experimental plots to elucidate the relative importance of each factor in the recruitment of scarlet gilia seedlings. We detected a significant interaction between seed addition and surface...

journal_title：Oecologia

authors： Juenger T,Bergelson J

更新日期：2000-05-01 00:00:00

abstract：:Predators can alter the outcome of ecological interactions among other members of the food web through their effects on prey behavior. While it is well known that animals often alter their behavior with the imposition of predation risk, we know less about how other features of predators may affect prey behavior. For e...

journal_title：Oecologia

authors： Turner AM,Fetterolf SA,Bernot RJ

更新日期：1999-02-01 00:00:00

abstract：:Two atlantic voyages were made by the FS Meteor during which pollen and spores were collected from the air. In the course of 32 days the average pollen content was 29/100 m3 air, the average spore content came to 5x104/100 m3 air. Both voyages occurred in late autumn. On the trip from Hamburg to the Azores the spore c...

journal_title：Oecologia

authors： Stix E

更新日期：1975-09-01 00:00:00

abstract：:The sensible and latent heat losses of a maritime pine stand (Pinus pinaster Aiton) and of its understorey were measured in Portugal, in conditions of mild water stress, using an eddy covariance technique (monodimensional sonic anemometer coupled with a thin thermocouple and a fast-response hygrometer) at two levels a...

journal_title：Oecologia

authors： Berbigier P,Bonnefond JM,Loustau D,Ferreira MI,David JS,Pereira JS

更新日期：1996-03-01 00:00:00

abstract：:Plant stigmas and bee pollinators are competitors for pollen. Pollen placed on a pollinator's body can be picked up by conspecific stigmas or it can be collected by the pollinator as food. Hypothetically, one solution is for pollen to be placed on 'safe sites' on the pollinator's body, sites where the pollinator canno...

journal_title：Oecologia

authors： Tong ZY,Huang SQ

更新日期：2018-01-01 00:00:00

abstract：:Belowground processes in light gap openings are poorly understood, particularly in tropical forests. Fine roots in three zones of light gap openings and adjacent intact forest were regularly measured in buried bags and surface litter envelopes for 2 years. Fine root biomass does not vary significantly within gaps for ...

journal_title：Oecologia

authors： Sanford RL Jr

更新日期：1990-07-01 00:00:00

abstract：:Prey subsidies originating from detritus add nutrients and energy to arboreal communities. Measurement of this subsidy is required in the understanding of how food web dynamics respond to changes in surrounding environments. Shrub spiders are one of the key predators involved in food web coupling. We evaluate the effe...

journal_title：Oecologia

authors： Haraguchi TF,Uchida M,Shibata Y,Tayasu I

更新日期：2013-04-01 00:00:00

abstract：:Studies focused on how prey trade-off predation and starvation risk are prevalent in behavioral ecology. However, our current understanding of these trade-offs is limited in one key respect: we know little about the behavior of predators. In this study, we provide some of the first detailed information on temporal pat...

journal_title：Oecologia

authors： Roth TC 2nd,Lima SL

更新日期：2007-05-01 00:00:00

abstract：:Several studies have suggested that aquatic microcrustaceans are relatively efficient dispersers in a variety of landscapes, whereas others have indicated dispersal limitation at large spatial scales or under specific circumstances. Based on a survey of a set of recently created ponds in an area of approximately 18 × ...

journal_title：Oecologia

authors： Juračka PJ,Declerck SA,Vondrák D,Beran L,Černý M,Petrusek A

更新日期：2016-03-01 00:00:00

abstract：:Tests of density dependent regulation of population size depend on the concept of equilibrium population size. Such an equilibrium is a purely theoretical construct whose existence in the field is debatable and whose value cannot be measured. An equilibrium is supposed to fluctuate in time, but the extent of the fluct...

journal_title：Oecologia

authors： Wolda H

更新日期：1989-11-01 00:00:00

abstract：:Deuterium isotope analyses have revolutionized the study of migratory connectivity because global gradients of deuterium in precipitation (deltaD(P)) are expressed on a continental scale. Several authors have constructed continental scale base maps of deltaD(P) to provide a spatial reference for studying the movement ...

journal_title：Oecologia

authors： Farmer A,Cade BS,Torres-Dowdall J

更新日期：2008-11-01 00:00:00