The autotrophic contribution to soil respiration in a northern temperate deciduous forest and its response to stand disturbance.

abstract：:This study reports a rare example where a native herbivorous insect frequently overexploits local populations of its perennial host. Local dynamics of a flightless weevil (Hadramphus spinipennis, Curculionidae) and its host plant (Aciphylla dieffenbachii, Apiaceae) were assessed for one discrete patch. In this main st...

journal_title：Oecologia

authors： Schöps K

更新日期：2002-07-01 00:00:00

abstract：:Gas exchange characteristics of droughted and rewatered Portulacaria afra were studied during the seasonal shift from CAM to C3 photosynthesis. 14CO2 uptake, stomatal conductance, and total titratable acidity were determined for both irrigated and 2, 4, and 7.5 month waterstressed plants from summer 1984 to summer 198...

journal_title：Oecologia

authors： Guralnick LJ,Ting IP

更新日期：1986-08-01 00:00:00

abstract：:The ability to utilize NO inf3sup- in seven high arctic plant species from Truelove Lowland, Devon Island, Canada was investigated, using an in vivo assay of maximum potential nitrate reductase (NR) activity and applications of 15N. Plant species were selected on the basis of being characteristic of nutrient-poor and ...

journal_title：Oecologia

authors： Atkin OK,Villar R,Cummins WR

更新日期：1993-11-01 00:00:00

abstract：:In southeastern Arizona, Prosopis juliflora (Swartz) DC. and Quercus emoryi Torr. are the dominant woody species at grassland/woodland boundaries. The stability of the grassland/woodland boundary in this region has been questioned, although there is no direct evidence to confirm that woodland is encroaching into grass...

journal_title：Oecologia

authors： McPherson GR,Boutton TW,Midwood AJ

更新日期：1993-02-01 00:00:00

abstract：:A series of field and laboratory experiments were conducted to examine whether natural levels of insect herbivory affect the arbuscular mycorrhizal (AM) colonization of two plant species. The plant species were the highly mycorrhizal (mycotrophic) Plantago lanceolata, which suffers small amounts of insect damage conti...

journal_title：Oecologia

authors： Gange AC,Bower E,Brown VK

更新日期：2002-03-01 00:00:00

abstract：:We analyze gut architectures of 42 species of marine polychaetes in terms of their anatomically distinct compartments, and quantify differences among guts in terms of ratios of body volume to gut volume, relative compartmental volumes, total gut aspect ratios and compartmental aspect ratios. We use multivariate techni...

journal_title：Oecologia

authors： Penry DL,Jumars PA

更新日期：1990-01-01 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：:Large-bodied zooplankton of the genus Daphnia are thought to be keystone species in freshwater pelagic habitats, potentially able to exert strong grazing effects and enhance phosphorus limitation of algae. I examined the degree to which Daphnia pulex differ from small-bodied zooplankton in their effects on algal bioma...

journal_title：Oecologia

authors： Steiner CF

更新日期：2002-05-01 00:00:00

abstract：:Determining how environmental conditions interact with individual intrinsic properties is important for unravelling the underlying mechanisms that drive variation in reproductive decisions among migratory species. We investigated the influence of sea ice conditions and body condition at arrival on the breeding propens...

journal_title：Oecologia

authors： Jean-Gagnon F,Legagneux P,Gilchrist G,Bélanger S,Love OP,Bêty J

更新日期：2018-01-01 00:00:00

abstract：:This study examines the oviposition response of a specialist weevil (Mogulones larvatus) to patches of its host, the noxious weed Paterson"s curse/salvation Jane (Echium plantagineum). We simultaneously examined the effect of patch size and plant density (and their interaction), on the recorded oviposition patterns. O...

journal_title：Oecologia

authors： Shea K,Smyth M,Sheppard A,Morton R,Chalimbaud J

更新日期：2000-09-01 00:00:00

abstract：:Chemical cues that evoke anti-predator developmental changes have received considerable attention, but it is not known to what extent prey use information from the smell of predators and from cues released through digestion. We conducted an experiment to determine the importance of various types of cues for the adjust...

journal_title：Oecologia

authors： Hettyey A,Tóth Z,Thonhauser KE,Frommen JG,Penn DJ,Van Buskirk J

更新日期：2015-11-01 00:00:00

abstract：:Human disturbances to ecosystems have created challenges to populations worldwide, forcing them to respond phenotypically in ways that increase their fitness under current conditions. One approach to examining population responses to disturbance in species with complex life histories is to study species that exhibit s...

journal_title：Oecologia

authors： Hegg JC,Kennedy BP,Chittaro PM,Zabel RW

更新日期：2013-08-01 00:00:00

abstract：:Heterotrophic gains of carbon from various host species by the root hemiparasitic shrub Olax phyllanthi (Labill) R.Br. were assessed using techniques based on carbon isotope discrimination (δ13C) on C3 and C4 hosts and C:N ratios of xylem sap and dry matter of host and parasite. Heterotrophic benefits (H) to Olax base...

journal_title：Oecologia

authors： Tennakoon KU,Pate JS

更新日期：1996-02-01 00:00:00

abstract：:The demographic and ecological characteristics of island populations of small mammals have received increasing attention in recent years, but few studies have compared the behavioral characteristics of island populations with those of mainland populations. Behavior is considered an important variable because it is bel...

journal_title：Oecologia

authors： Halpin ZT

更新日期：1981-01-01 00:00:00

abstract：:Since the publication of the theory of island biogeography, ecologists have postulated that fragmentation of continuous habitat presents a prominent threat to species diversity. However, negative fragmentation effects may be artifacts; the result of species diversity declining with habitat loss, and habitat loss corre...

journal_title：Oecologia

authors： MacDonald ZG,Anderson ID,Acorn JH,Nielsen SE

更新日期：2018-01-01 00:00:00

abstract：:The glossiphoniid leeches Helobdella stagnalis and Glossiphonia complanata co-exist on the stony shores of British lakes. Because both species have a similar life-style and are food limited, the question arises as to how coexistence persists. Laboratory experiments investigated if either leech has a competitive advant...

journal_title：Oecologia

authors： Young JO,Martin AJ,Seaby RM

更新日期：1993-03-01 00:00:00

abstract：:Predators attack and plants defend, so herbivores face the dilemma of how to eat enough without being eaten. But do differences in the personality of herbivores affect the foraging choices of individuals? We explored the ecological impact of personality in a generalist herbivore, the brushtail possum (Trichosurus vulp...

journal_title：Oecologia

authors： Mella VS,Ward AJ,Banks PB,McArthur C

更新日期：2015-01-01 00:00:00

abstract：:This study links summer foraging and scatter-hoarding to winter larder-hoarding and winter survival in yellow pine chipmunks (Tamias amoenus) by comparing patterns of time allocation and winter larder contents in 2 years with very different levels of resource availability. In 2003, seed production and the number of tr...

journal_title：Oecologia

authors： Kuhn KM,Vander Wall SB

更新日期：2008-08-01 00:00:00

abstract：:Senecio vulgaris from ruderal habitats may colonise crop fields and persist in the new environment. Persistence may occur through phenotypic plasticity or genetic differentiation. In the presence of genetic variation, differential responses of life history traits to selection may lead to local adaptation. A reciprocal...

journal_title：Oecologia

authors： Leiss KA,Müller-Schärer H

更新日期：2001-07-01 00:00:00

abstract：:Analysis of the degree of order in species assemblages in terms of nested subsets has received increased interest during the last decade. However, recently a series of papers have questioned the validity of methods employed for testing whether observed patterns deviate from random expectations. The current view seems ...

journal_title：Oecologia

authors： Jonsson BG

更新日期：2001-05-01 00:00:00

abstract：:The dependence of leaf water potential (Ψ), osmotic potential (π) and turgor pressure (P) on relative water content (RWC) was determined for leaves of tall and short growth forms of Spartina alterniflora Loisel. from a site on Canary Creek marsh in Lewes, Delaware. Tall plants (ca. 1.5 m) occured along a drainage ditc...

journal_title：Oecologia

authors： Drake BG,Gallagher JL

更新日期：1984-06-01 00:00:00

abstract：:Although host preferences in phytophagous insects may be generated by several factors, few studies have simultaneously examined several potential host choice determinants. In this study we tested the impact of the following potential host choice determinants on host preference of the semi-aquatic lepidopteran Munroess...

journal_title：Oecologia

authors： Dorn NJ,Cronin G,Lodge DM

更新日期：2001-08-01 00:00:00

abstract：:Leaves of birch (Betula pendula Roth) and sycamore (Acer pseudoplatanus L.) were initiated and grown either in a simulated shadelight (80 μmol m-2 s-1, R/FR ratio 0.28)/dark photoenvironment or a white light (250 μmol m-2 s-1, R/FR>1)/dark photoenvironment. Until the leaves were more than 50% expanded, growth rates (m...

journal_title：Oecologia

authors： Taylor G,Davies WJ

更新日期：1986-07-01 00:00:00

abstract：:General scaling rules or constants for metabolic and structural plant allometry as assumed by the theory of Euclidian geometric scaling (2/3-scaling) or metabolic scaling (3/4-scaling) may meet human's innate propensity for simplicity and generality of pattern and processes in nature. However, numerous empirical works...

journal_title：Oecologia

authors： Pretzsch H,Dieler J

更新日期：2012-07-01 00:00:00

abstract：:The hypothesis that carnivorous plants are less responsive to prey at high soil nutrient levels than at lower levels (Givnish et al. 1984) is tested on four plant species (Drosera rotundifolia, Pinguicula alpina, P. villosa and P. vulgaris) from a subarctic environment. The response, measured in terms of seven charact...

journal_title：Oecologia

authors： Karlsson PS,Nordell KO,Carlsson BÅ,Svensson BM

更新日期：1991-03-01 00:00:00

abstract：:White-footed mice, Peromyscus leucopus noveboracensis, and deer mice, P. maniculatus nubiterrae, occur sympatically throughout much of the Appalachian Mountains of the eastern United States. Previous studies have shown that these two species are behaviorally and ecologically similar and do not partition food or microh...

journal_title：Oecologia

authors： Wolff JO

更新日期：1996-11-01 00:00:00

abstract：:The impact of predation by the robber fly Proctacanthus milbertii Macquart on populations of adult grasshoppers from grasslands of the Nebraska sandhills was estimated. Densities of P. milbertii were estimated at 437 individuals per hectare (2 se=122). Overall densities of 23 species of grasshoppers were estimated to ...

journal_title：Oecologia

authors： Joern A,Rudd NT

更新日期：1982-10-01 00:00:00

abstract：:There are three major components to plant structure relevant to searching parasitoids: 1) plant size or surface area, 2) the variation among plant parts (structural heterogeneity), such as seed heads, flowers and nectaries, and heterogeneous surfaces (e.g. glabrous, hirsute), and 3) the connectivity of parts or plant ...

journal_title：Oecologia

authors： Andow DA,Prokrym DR

更新日期：1990-02-01 00:00:00

abstract：:For organisms with restricted mobility, density dependence may occur on spatial scales much smaller than that of the whole population. Averaging densities over whole populations in such organisms gives a more or less inaccurate description of the real variation in competitive intensity over time and space. The potenti...

journal_title：Oecologia

authors： Einum S,Nislow KH

更新日期：2005-03-01 00:00:00

abstract：:Increased nitrogen (N) deposition, resulting from the combustion of fossil fuels, production of synthetic fertilizers, growth of N(2)-fixing crops and high-intensity agriculture, is one of the anthropogenic factors most likely to cause global biodiversity changes over the next century. This influence may be especially...

journal_title：Oecologia

authors： Skogen KA,Holsinger KE,Cardon ZG

更新日期：2011-01-01 00:00:00