Guppy populations differ in cannibalistic degree and adaptation to structural environments.

abstract：:Dusky-footed woodrats (Neotoma fuscipes) and desert woodrats (N. lepida) experience pronounced seasonal variations in the aridity of their habitats. The effects of seasonal aridity upon the water conserving abilities of these species were assessed through measurements of water conserving abilities and kidney structure...

journal_title：Oecologia

authors： Stallone JN

更新日期：1979-01-01 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：:Parents are expected to overproduce the less costly sex under poor food conditions. The previously regular 3-year cycle in the abundance of voles, the main prey of the Ural owl, Strix uralensis, temporarily disappeared in 1999-2001. We studied Ural owls' parental feeding investment and sex allocation during these poor...

journal_title：Oecologia

authors： Brommer JE,Karell P,Pihlaja T,Painter JN,Primmer CR,Pietiäinen H

更新日期：2003-09-01 00:00:00

abstract：:Folivory results in both leaf damage and the loss of photosynthetic capacity. Leaf damage activates the production of induced defenses, but diminished photosynthetic capacity resulting from lost leaf area may impair a plant's ability to respond defensively. Because damage-induced nicotine production in Nicotiana sylve...

journal_title：Oecologia

authors： Baldwin IT,Schmelz EA

更新日期：1994-04-01 00:00:00

abstract：:Increased biological diversity due to invasion by non-indigenous species (NIS) is a global phenomenon with potential effects on trophic interactions and ecosystem processes in the invaded habitat. We assessed the effects of resource availability and invasion of three non-indigenous invertebrate grazers (two crustacean...

journal_title：Oecologia

authors： Wikström SA,Hillebrand H

更新日期：2012-01-01 00:00:00

abstract：:Provenance translocations of tree species are promoted in forestry, conservation, and restoration in response to global climate change. While this option is driven by adaptive considerations, less is known of the effects translocations can have on dependent communities. We investigated the relative importance and cons...

journal_title：Oecologia

authors： Gosney BJ,Potts BM,Forster LG,Whiteley C,O'Reilly-Wapstra JM

更新日期：2021-01-20 00:00:00

abstract：:Most research on the demography of wild animal populations has focused on characterizing the variation in the mortality of organisms as a function of intrinsic and environmental characteristics. However, such variation in mortality is difficult to relate to functional life history components (e.g. reproduction, disper...

journal_title：Oecologia

authors： Le Cœur C,Chantepie S,Pisanu B,Chapuis JL,Robert A

更新日期：2016-07-01 00:00:00

abstract：:Invasion of non-native annuals across the Intermountain West is causing a widespread transition from perennial sagebrush communities to fire-prone annual herbaceous communities and grasslands. To determine how this invasion affects ecosystem function, carbon and water fluxes were quantified in three, paired sagebrush ...

journal_title：Oecologia

authors： Prater MR,Obrist D,Arnone JA 3rd,DeLucia EH

更新日期：2006-01-01 00:00:00

abstract：:Computer simulations of a pollinator foraging in a mixture of two species were used to explore how plant reproduction can be influenced by interspecific pollination movements. Interspecific pollen transfer led to strong competitive effects when availabilities of pollen, receptive stigma surfaces, or pollinator movemen...

journal_title：Oecologia

authors： Waser NM

更新日期：1978-01-01 00:00:00

abstract：:Temperature is a powerful correlate of large-scale terrestrial and marine diversity patterns but the mechanistic links remain unclear. Whilst many explanations have been proposed, quantitative predictions that allow them to be tested statistically are often lacking. As an important exception, the metabolic theory of e...

journal_title：Oecologia

authors： Rombouts I,Beaugrand G,Ibaňez F,Chiba S,Legendre L

更新日期：2011-06-01 00:00:00

abstract：:Flight of male and female Mexican bean beetle adults was examined in laboratory tests. The experimental design made it possible to examine flight behavior not only with respect to different types of hosts (young vs senescent common bean foliage) but also with respect to effects due to their utilization during particul...

journal_title：Oecologia

authors： Saks ME,Rankin MA,Stinner RE

更新日期：1988-03-01 00:00:00

abstract：:We deal with the causes of the synchronously fluctuating numbers of subpopulations of the carabid species Calathus melanocephalus as compared with the asynchronously fluctuating numbers of subpopulations of the carabid Pterostichus versicolor. Both species continuously occupy a large heath area, Dwingelder Veld (1600 ...

journal_title：Oecologia

authors： van Dijk TS,den Boer PJ

更新日期：1992-06-01 00:00:00

abstract：:Effective communication regarding distance in the vertical dimension is critical for many ecological, climatological and broader geophysical studies of the Earth. Confusion exists regarding the definition of three English words commonly used to describe the vertical dimension: (1) elevation; (2) altitude; and (3) he...

journal_title：Oecologia

authors： McVicar TR,Körner C

更新日期：2013-02-01 00:00:00

abstract：:We report a field study of the haematocrit of pied flycatcher (Ficedula hypoleuca) nestlings when close to fledging. First a descriptive study was conducted of both fledgling and adult haematocrit over 2 years to analyse correlates of variation in this trait. Then a swapping experiment was performed to see whether var...

journal_title：Oecologia

authors： Potti J,Moreno J,Merino S,Frías O,Rodríguez R

更新日期：1999-07-01 00:00:00

abstract：:In both single- and mixed-species social groups, certain participants are known to play important roles in providing benefits. Identifying these participants is critical for understanding group dynamics, but is often difficult with large roving social groups in the wild. Here, we develop a new approach to characterize...

journal_title：Oecologia

authors： Sridhar H,Shanker K

更新日期：2014-11-01 00:00:00

abstract：:The chaparral shrub Eriodictyon californicum produces a flavonoid leaf resin with a chemically similar composition to that previously reported for the sympatric shrub Diplacus aurantiacus. We determined the phenology, resin content, and nitrogen content of Eriodictyon leaves and the leaf area lost to herbivores. Nitro...

journal_title：Oecologia

authors： Johnson ND,Chu CC,Ehrlich PR,Mooney HA

更新日期：1984-03-01 00:00:00

abstract：:Studies on the lizard, Anolis sagrei, revealed that after Hurricane Floyd devastated the Bahamas in 1999, some populations consisted only of hatchlings. Because the storm surge of the hurricane completely inundated these islands, apparently for up to 6 h, survival of anole eggs in salt water for such periods is implie...

journal_title：Oecologia

authors： Losos JB,Schoener TW,Spiller DA

更新日期：2003-11-01 00:00:00

abstract：:Sea lion and seal populations in Alaskan waters underwent various degrees of decline during the latter half of the twentieth century and the cause(s) for the declines remain uncertain. The stable carbon ((13)C/(12)C) and nitrogen ((15)N/(14)N) isotope ratios in bone collagen from wild Steller sea lions (Eumetopias jub...

journal_title：Oecologia

authors： Hirons AC,Schell DM,Finney BP

更新日期：2001-12-01 00:00:00

abstract：:Corridors connect otherwise isolated habitat patches and can direct movement of animals among such patches. In eight experimental landscapes, we tested two hypotheses of how corridors might affect dispersal behavior. The Traditional Corridor hypothesis posits that animals preferentially leave patches via corridors, fo...

journal_title：Oecologia

authors： Fried JH,Levey DJ,Hogsette JA

更新日期：2005-05-01 00:00:00

abstract：:Nonindigenous species can cause major changes to community interactions and ecosystem processes. The strong impacts of these species are often attributed to their high demographic success. While the importance of enemy release in facilitating invasions has often been emphasized, few studies have addressed the role of ...

journal_title：Oecologia

authors： Sargent LW,Baldridge AK,Vega-Ross M,Towle KM,Lodge DM

更新日期：2014-07-01 00:00:00

abstract：:Root proliferation in nutrient-rich soil patches is an important mechanism facilitating nutrient capture by plants. Although the phenomenon of root proliferation is well documented, the specific timing of this proliferation has not been investigated. We studied the timing and degree of root proliferation for three per...

journal_title：Oecologia

authors： Jackson RB,Caldwell MM

更新日期：1989-10-01 00:00:00

abstract：:This study examined the effects of intraspecific variation in leaf nitrogen and water content on the growth, consumption, conversion efficiency and nitrogen use of Colias butterfly larvae. Pest and non-pest Colias philodice eriphyle larvae and Colias eurytheme larvae were fed field-collected alfalfa (Medicago sativa) ...

journal_title：Oecologia

authors： Tabashnik BE

更新日期：1982-12-01 00:00:00

abstract：:Individual male and female Bufo woodhousei spent only two or three nights of the several week breeding season in the pond. In spite of the continual arriving and leaving of individuals the operational sex ratio (the number of females available to mate/number of males attempting to mate) varied little, either temporall...

journal_title：Oecologia

authors： Woodward BD

更新日期：1984-05-01 00:00:00

abstract：:Herbivores decrease plant fitness by consuming reproductive tissues, limiting resources, and/or affecting mutualisms. Although these mechanisms were extensively tested in chewing herbivores, the impact of other functional groups (e.g., sap-feeders) remains poorly understood. We investigated whether aphids affect plant...

journal_title：Oecologia

authors： Devegili AM,Chalcoff VR

更新日期：2020-11-01 00:00:00

abstract：:In order to understand habitat selection, it is important to consider the way individual animals assess the suitability of a future reproductive site. One way of investigating mechanisms (such as those involved in nest site selection) is to examine breeding success and habitat characteristics in terms of animals retur...

journal_title：Oecologia

authors： Hoi H,Krištín A,Valera F,Hoi C

更新日期：2012-05-01 00:00:00

abstract：:A stage-by-stage protocol for identifying simple or biased lottery, or non-lottery, patterns of seedling recruitment is outlined. For a simple (weighted) lottery to apply, the proportion of total individuals accounted for by one species at one stage of recruitment plotted against the proportion accounted for at a prev...

journal_title：Oecologia

authors： Lamont BB,Witkowski ET

更新日期：1995-03-01 00:00:00

abstract：:We explored whether a variation in predation and habitat complexity between conspecific populations can drive qualitatively different numerical dynamics in those populations. We considered two disjunct populations of the least killifish, Heterandria formosa, that exhibit long-term differences in density, top fish pred...

journal_title：Oecologia

authors： Richardson JM,Gunzburger MS,Travis J

更新日期：2006-04-01 00:00:00

abstract：:Plants of the cerrado tree species Qualea grandiflora and the annual herb Bidens gardneri were grown from seed in controlled environment rooms at 30/20° C and 12 hour photoperiod. Seedlings were grown in pots or small tubes containing sand and provided with various amounts of mineral solutions based on the formulation...

journal_title：Oecologia

authors： Felippe GM,Dale JE

更新日期：1990-01-01 00:00:00

abstract：:The increasing popularity of stable isotope analysis (SIA) as an ecological research tool and the ease of automated analysis have created a knowledge gap between ecologists using SIA and the operators of isotope ratio mass spectrometry (IRMS) equipment. This has led to deterioration in the understanding of IRMS method...

journal_title：Oecologia

authors： Jardine TD,Cunjak RA

更新日期：2005-08-01 00:00:00

abstract：:Long-term fertilization of acidic tussock tundra has led to changes in plant species composition, increases in aboveground production and biomass and substantial losses of soil organic carbon (SOC). Root litter is an important input to SOC pools, although little is known about fine root demography in tussock tundra. I...

journal_title：Oecologia

authors： Sullivan PF,Sommerkorn M,Rueth HM,Nadelhoffer KJ,Shaver GR,Welker JM

更新日期：2007-09-01 00:00:00