Extreme longevity in trees: live slow, die old?

abstract：:Development of ornamental characters exposed to directional selection may be particularly sensitive to the effect of parasitic infections. Antlers are ornamental characters of importance in intraspecific interactions, and are in reindeer (Rangifer) developed by both males and females. By antihelmintic treatment of nat...

journal_title：Oecologia

authors： Folstad I,Arneberg P,Karter AJ

更新日期：1996-03-01 00:00:00

abstract：:Studies relating reproduction to food availability are usually restricted to food quantity, but ignore food quality and the effects of habitat structure on obtaining the food. This is particularly true for insectivorous birds. In this study we relate measures of reproductive success, time of reproduction and nestling ...

journal_title：Oecologia

authors： Brodmann PA,Reyer HU,Bollmann K,Schläpfer AR,Rauter C

更新日期：1997-01-01 00:00:00

abstract：:Branch sampling of branch diameter and fruit crop on 22 species of Barbadian trees and shrubs provided sufficient data to build regressions between plant size and fruit crop weight. Orchard plants bear much more fruit than wild, feral or garden plants of similar size, but this difference disappears in multiple regress...

journal_title：Oecologia

authors： Peters RH,Cloutier S,Dubé D,Evans A,Hastings P,Kaiser H,Kohn D,Sarwer-Foner B

更新日期：1988-01-01 00:00:00

abstract：:The family of orchids involves a number of critically endangered species. Understanding of drivers of their landscape distribution could provide a valuable insight into their decline. Our objectives were to develop models predicting distribution of selected orchid species-four co-occurring forest orchid species, Cepha...

journal_title：Oecologia

authors： Hemrová L,Kotilínek M,Konečná M,Paulič R,Jersáková J,Těšitelová T,Knappová J,Münzbergová Z

更新日期：2019-06-01 00:00:00

abstract：:Plant population and community dynamics may be altered by increasing atmospheric CO(2) concentrations [[CO(2)]] through intraspecific variation in the responses of vegetative and reproductive growth. Although these responses may be regulated by age at flowering, little is known about the direct effects of age at flowe...

journal_title：Oecologia

authors： Lewis JD,Wang X,Griffin KL,Tissue DT

更新日期：2003-04-01 00:00:00

abstract：:Plant resistance and tolerance to herbivores, parasites, pathogens, and abiotic factors may involve two types of costs. First, resistance and tolerance may be costly in terms of plant fitness. Second, resistance and tolerance to multiple enemies may involve ecological trade-offs. Our study species, the stinging nettle...

journal_title：Oecologia

authors： Puustinen S,Koskela T,Mutikainen P

更新日期：2004-03-01 00:00:00

abstract：:Long-term experimental systems with overlapping generations using a seed beetle, Callosobruchus chinensis, were maintained by providing 5 g of azuki beans (Vigna angularis) in two different renewal intervals: either 7 days or 10 days. The 7-day-renewal system (system 1) showed oscillatory dynamics with a constant peri...

journal_title：Oecologia

authors： Shimada M,Tuda M

更新日期：1996-01-01 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：:Microtus duodecimcostatus in a mediterranean vole which is not known to display spectacular increases in population numbers as in some microtine species. A population was studied in southern France with a capture-recapture method. The population included resident adults which have a high and constant survival rate (mo...

journal_title：Oecologia

authors： Paradis E,Guédon G

更新日期：1993-03-01 00:00:00

abstract：:Soil properties of pioneer Pinus flexilis stands with similar topography and climate were investigated. Soils supporting this tree in association with Cercocarpus ledifolius were found to have higher percentages of total nitrogen than soils beneath similar stands lacking Cercocarpus.An excavated Cercocarpus ledifolius...

journal_title：Oecologia

authors： Lepper MG,Fleschner M

更新日期：1977-12-01 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：:Common generalizations concerning the ecologic significance of C4 photosynthesis were tested in a study of plant gas exchange, productivity, carbon balance, and water use in monospecific communities of C3 and C4 salt desert shrubs. Contrary to expectations, few of the hypotheses concerning the performance of C4 specie...

journal_title：Oecologia

authors： Caldwell MM,White RS,Moore RT,Camp LB

更新日期：1977-12-01 00:00:00

abstract：:Ecophysiological differences related to photosynthesis were compared in holm oak Quercus ilex leaves from undisturbed holm-oak vegetation, resprouts after fire and resprouts after tree-fell. No significant differences in any parameter measured were observed between the two kinds of resprout throughout the first growin...

journal_title：Oecologia

authors： Fleck I,Grau D,Sanjosé M,Vidal D

更新日期：1996-02-01 00:00:00

abstract：:Mortality estimates for the immature stages of two butterfly species, Danaus plexippus and D. chrysippus, were obtained by observing the survival of egg cohorts on different sized patches of food plants (Asclepias spp.), over a one-year period. Losses were variable (0-100%) but usually high (90% and over) throughout t...

journal_title：Oecologia

authors： Zalucki MP,Kitching RL

更新日期：1982-01-01 00:00:00

abstract：:In abandoned or extensively managed grasslands, the mechanisms involved in pioneer tree species success are not fully explained. Resource competition among plants and microclimate modifications have been emphasised as possible mechanisms to explain variation of survivorship and growth. In this study, we evaluated a nu...

journal_title：Oecologia

authors： Picon-Cochard C,Coll L,Balandier P

更新日期：2006-06-01 00:00:00

abstract：:Endozoochory plays a prominent role for the dispersal of seed plants, and dispersal vectors are well known. However, for taxa such as ferns and bryophytes, endozoochory has only been suggested anecdotally but never tested in controlled experiments. We fed fertile leaflets of three ferns and capsules of four bryophyte ...

journal_title：Oecologia

authors： Boch S,Berlinger M,Fischer M,Knop E,Nentwig W,Türke M,Prati D

更新日期：2013-07-01 00:00:00

abstract：:In this paper, we test the mid-domain hypothesis as an explanation for observed patterns of flowering diversity in two sub-alpine communities of insect-pollinated plants. Observed species richness patterns showed an early-season increase in richness, a mid-season peak, and a late-season decrease. We show that a "mid-d...

journal_title：Oecologia

authors： Morales MA,Dodge GJ,Inouye DW

更新日期：2005-01-01 00:00:00

abstract：:Climate change causes species range expansions to higher latitudes and altitudes. It is expected that, due to differences in dispersal abilities between plants and soil biota, range-expanding plant species will become associated with a partly new belowground community in their expanded range. Theory on biological inva...

journal_title：Oecologia

authors： Wilschut RA,Magnée KJH,Geisen S,van der Putten WH,Kostenko O

更新日期：2020-10-01 00:00:00

abstract：:For a symbiosis to be a mutualism, benefits received must exceed costs incurred for both partners. Partners can prevent costly overexploitation through behaviors that moderate interactions with the other symbiont. In a symbiosis between crayfish and branchiobdellidan annelids, the worms can increase crayfish survival ...

journal_title：Oecologia

authors： Farrell KJ,Creed RP,Brown BL

更新日期：2014-02-01 00:00:00

abstract：:Phenological synchrony between budburst and emergence of larvae is critical for the fitness of many spring-feeding insect herbivores. Therefore, large intraspecific variation in timing of budburst of the host may have a negative effect on the herbivore. We studied how asynchrony between emergence of larvae and budburs...

journal_title：Oecologia

authors： Tikkanen OP,Julkunen-Tiitto R

更新日期：2003-07-01 00:00:00

abstract：:We examined the manner in which animals adjust the proportion of energy allocated to growth and storage in response to food availability. We compared univariate growth and length-mass relationships between juvenile adders (Vipera berus) reared under two different feeding regimes. Animals in the low- and high-food expe...

journal_title：Oecologia

authors： Forsman A,Lindell LE

更新日期：1996-12-01 00:00:00

abstract：:Studies of nitrogen (N) cycling have traditionally focused on N mineralization as the primary process limiting plant assimilation of N. Recent evidence has shown that plants may assimilate amino acids (AAs) directly, circumventing the mineralization pathway. However, the general abundance of soil AAs and their relativ...

journal_title：Oecologia

authors： Hofmockel KS,Fierer N,Colman BP,Jackson RB

更新日期：2010-08-01 00:00:00

abstract：:It is illustrated theoretically that in a heterogeneous habitat the dispersal of individuals, even when it is random and density-independent, may have a pronounced effect of raising the average reproductive rate of the whole population, in addition to the effect of stabilization in the usual sense of reducing its vari...

journal_title：Oecologia

authors： Kuno E

更新日期：1981-05-01 00:00:00

abstract：:Like many polyphagous herbivores, individuals of Sarasinula plebeia (Fischer) (Soleolifera: Veronicellidae) consume a variety of plant species that may differ in nutritional content. In this study we determined the ability of these slugs to compensate for such variation in diet composition. Dilution with water of an a...

journal_title：Oecologia

authors： Rueda AA,Slansky F Jr,Wheeler GS

更新日期：1991-10-01 00:00:00

abstract：:Amphicarpum purshii is an annual grass which mostly grows in disturbed areas of the New Jersey Pine Barrens, USA. It is amphicarpic, producing spikelets (and seeds) both above and below the soil surface. Previous research has shown that subterranean seed production ensures reproduction in the event of a major disturba...

journal_title：Oecologia

authors： Cheplick GP,Quinn JA

更新日期：1987-09-01 00:00:00

abstract：:Gene frequencies at nine polymorphic enzyme loci were followed in 22 cage populations of D. melanogaster all founded from the same stock but subsequently maintained in different environments. The three factors distinguishing the different environments were temperature and the alcohol and yeast in the medium and for ea...

journal_title：Oecologia

authors： Oakeshott JG

更新日期：1979-12-01 00:00:00

abstract：:Perennial species have evolved several strategies to survive fire, with resprouters and seeders forming two major categories. Gompholobium marginatum is a herbaceous seeder legume occurring in the Western Australian jarrah (Eucalyptus marginata) forest which since 1961 has been subjected to burns every sixth year. Suc...

journal_title：Oecologia

authors： Hansen A,Pate JS,Hansen AP

更新日期：1992-05-01 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：:The contribution of small mammals to nitrogen cycling could have repercussions for the producer community in the maintaining or perhaps magnifying of nitrogen availability. Our objective was to model nitrogen outputs (deposition of feces and urine) of small mammals in an old-field ecosystem and estimate the amount of ...

journal_title：Oecologia

authors： Clark JE,Hellgren EC,Parsons JL,Jorgensen EE,Engle DM,Leslie DM Jr

更新日期：2005-07-01 00:00:00

abstract：:Two key insights to better assess the ecological impact of global warming have been poorly investigated to date: global warming effects on the integrated life cycle and effects of heat waves. We tested the effect of a simulated mild (25 °C) and severe (30 °C) heat wave experienced during the larval stage on the flight...

journal_title：Oecologia

authors： Arambourou H,Sanmartín-Villar I,Stoks R

更新日期：2017-05-01 00:00:00