Sex ratio variation and spatial distribution of Siparuna grandiflora, a tropical dioecious shrub.

abstract：:In vernal ponds in the boreal region, egg-over-wintering Agabus species form a guild that feeds mainly on larvae and pupae of aedine mosquitoes. The regular co-existence of very similar Agabus species indicates local communities not structured by interspecific competition. However, the lower number of species in local...

journal_title：Oecologia

authors： Nilsson AN,Söderström O

更新日期：1988-06-01 00:00:00

abstract：:Data from the US/IBP Desert Biome validation studies indicate that above-ground production and biomass allocated to reproduction in Larrea tridentata vary from one year to another depending upon the timing and extent of soil-moisture availability. In an attempt to verify these observations and determine to what extent...

journal_title：Oecologia

authors： Cunningham GL,Syvertsen JP,Reynolds JF,Willson JM

更新日期：1979-01-01 00:00:00

abstract：:Behavioral traits and diet were traditionally thought to be highly plastic within individuals. This view was espoused in the widespread use of optimality models, which broadly predict that individuals can modify behavioral traits and diet across ecological contexts to maximize fitness. Yet, research conducted over the...

journal_title：Oecologia

authors： Toscano BJ,Gownaris NJ,Heerhartz SM,Monaco CJ

更新日期：2016-09-01 00:00:00

abstract：:Climate plays a fundamental role in limiting the range of a species, is a key factor in the dynamics of large herbivores, and is thought to be involved in declines of moose populations in recent decades. We examined effects of climate and growing-season phenology on recruitment (8-9 months old) of young Shiras moose (...

journal_title：Oecologia

authors： Monteith KL,Klaver RW,Hersey KR,Holland AA,Thomas TP,Kauffman MJ

更新日期：2015-08-01 00:00:00

abstract：:Tooth enamel apatite carbonate carbon and oxygen isotope ratios of modern kangaroos (Macropus spp.) collected on a 900-km latitudinal transect spanning a C(3)-C(4) transition zone were analysed to create a reference set for palaeoenvironmental reconstruction in southern Australia. The carbon isotope composition of ena...

journal_title：Oecologia

authors： Brookman TH,Ambrose SH

更新日期：2013-02-01 00:00:00

abstract：:The impact of the xylem-tapping mistletoe Phoradendron juniperinum on the nitrogen and water relations of its host Juniperus osteosperma was investigated under natural field conditions. Leaf conductance, leaf water potential, and leaf Kjeldahl nitrogen contents were followed through the growing season on mistletoes, i...

journal_title：Oecologia

authors： Ehleringer JR,Cook CS,Tieszen LL

更新日期：1986-01-01 00:00:00

abstract：:Demographic, functional, or habitat diversity can confer stability on populations via portfolio effects (PEs) that integrate across multiple ecological responses and buffer against environmental impacts. The prevalence of these PEs in aquatic organisms is as yet unknown, and can be difficult to quantify; however, unde...

journal_title：Oecologia

authors： Siple MC,Francis TB

更新日期：2016-01-01 00:00:00

abstract：:Growth and morphology of seedlings of ten tropical rain forest species were studied at Los Tuxtlas, Mexico. Seedlings were grown in three environmental conditions: the shaded forest understorey (FU, receiving 0.9-2.3% of the daily photosynthetic photon flux, PF, above the canopy), a small canopy gap of approx. 50 m2 (...

journal_title：Oecologia

authors： Popma J,Bongers F

更新日期：1988-05-01 00:00:00

abstract：:Recently, community ecology has emphasized the multi-facetted aspects of biological diversity by linking species traits and the environment. Here, we explored environmental correlates of taxonomically-based and traits-based compositional distances using a comprehensive data set of diatom and macroinvertebrate communit...

journal_title：Oecologia

authors： Perez Rocha M,Bini LM,Grönroos M,Hjort J,Lindholm M,Karjalainen SM,Tolonen KE,Heino J

更新日期：2019-12-01 00:00:00

abstract：:Plant species and growth forms differ widely in litter chemistry, which affects decay and may have important consequences for plant growth via e.g. the release of nutrients and growth-inhibitory compounds. We investigated the overall short-term (9.5 months) and medium-term (21.5 months) feedback effects of leaf litter...

journal_title：Oecologia

authors： Dorrepaal E,Cornelissen JH,Aerts R

更新日期：2007-03-01 00:00:00

abstract：:I suggest that between-community variations in diversity patterns during succession in plant communities are due to the effects of selection on life history strategies under different disturbance regimes. Natural disturbances to plant communities are simultaneously a source of mortality for some individuals and a sour...

journal_title：Oecologia

authors： Denslow JS

更新日期：1980-07-01 00:00:00

abstract：:The impacts of disturbance on biodiversity and distributions have been studied in many systems. Yet, comparatively less is known about how lichens-obligate symbiotic organisms-respond to disturbance. Successful establishment and development of lichens require a minimum of two compatible yet usually unrelated species t...

journal_title：Oecologia

authors： Tripp EA,Lendemer JC,McCain CM

更新日期：2019-06-01 00:00:00

abstract：:There is considerable variation in cannibalism between different species and also between individuals of different species, although relatively little is known about what creates this variation. We investigated the degree of cannibalism in guppy (Poecilia reticulata) populations originating from high and low predation...

journal_title：Oecologia

authors： Nilsson KA,Lundbäck S,Postavnicheva-Harri A,Persson L

更新日期：2011-10-01 00:00:00

abstract：:Predator-generated variation in prey energy intake remains the dominant explanation of adaptive response to predation risk in prey life history, morphology and physiology across a wide range of taxa. This "behavioural hypothesis" suggest that chemical or visual signals of predation risk reduce prey energy intake leadi...

journal_title：Oecologia

authors： Beckerman AP,Wieski K,Baird DJ

更新日期：2007-05-01 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：:At least once a year the mountain pine beetle searches for lodgepole pines that provide a suitable habitat for a new brood. After attacking females feed, they produce an attractant pheromone that causes beetles to aggregate and, during outbreaks, to usually mass attack the "focus" tree. Near the completion of mass att...

journal_title：Oecologia

authors： Geiszler DR,Gallucci VF,Gara RI

更新日期：1980-01-01 00:00:00

abstract：:This paper gives the first reports on aphid effects on rhizosphere organisms as influenced by soil nutrient status and plant development. Barley plants grown in pots fertilized with N but without P (N), with N and P (NP), or not fertilized (0) were sampled in the early growth phase (day 25), 1 week before and 1 week a...

journal_title：Oecologia

authors： Vestergård M,Bjørnlund L,Christensen S

更新日期：2004-09-01 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

abstract：:The Yellow-bellied Glider, Petaurus australis, was observed to feed sporadically but extensively on eucalypt sap. Gliders extracted sap by making incisions into the bark with their procumbent lower incisor teeth and licking the resulting exudate. Less than 1% of possible trees were incised for sap. Sap flow and sap-su...

journal_title：Oecologia

authors： Goldingay RL

更新日期：1987-08-01 00:00:00

abstract：:The objective of this study was to separate the effects of plant biomass and growth rate on vegetative reproduction in two species of cat-tail, Typha latifolia and T. angustifolia. Replicate clones of both species were grown under conditions of 100%, 42%, 24%, and 9% full sunlight with harvests at 41, 70, and 91 days ...

journal_title：Oecologia

authors： Grace JB,Wetzel RG

更新日期：1981-08-01 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：:Hydrogen isotope (δ2H) analysis has been routinely used as an ecological tracer for animal movement and migration, yet a biochemical understanding of how animals incorporate this element in the synthesis of tissues is poorly resolved. Here, we apply a new analytical tool, amino acid (AA) δ2H analysis, in a controlled ...

journal_title：Oecologia

authors： Newsome SD,Nakamoto BJ,Curras MR,Fogel ML

更新日期：2020-08-01 00:00:00

abstract：:Populations of invasive species tend to have fewer parasites in their introduced ranges than in their native ranges and are also thought to have fewer parasites than native prey. This 'release' from parasites has unstudied implications for native predators feeding on exotic prey. In particular, shifts from native to e...

journal_title：Oecologia

authors： Locke SA,Bulté G,Marcogliese DJ,Forbes MR

更新日期：2014-05-01 00:00:00

abstract：:Density-dependent mortality may regulate many populations, but due to an offshore larval phase in benthic marine organisms, it is often difficult to quantify the effects of mortality of arriving individuals. We added approximately 600 recruit-sized individuals onto coral reef that parallels patterns in naturally settl...

journal_title：Oecologia

authors： Brunton BJ,Booth DJ

更新日期：2003-11-01 00:00:00

abstract：:Stable carbon isotope techniques were employed to study the food habits of the termite Macrotermes michaelseni (Isoptera: Termitidae) in a semiarid savanna habitat in Kenya. At Kajiado this species utilized approximately 70% herbaceous vegetation (mostly grass) and 30% woody vegetation, while at Ruiru approximately 64...

journal_title：Oecologia

authors： Boutton TW,Arshad MA,Tieszen LL

更新日期：1983-08-01 00:00:00

abstract：:The costs and benefits of resource integration in Hydrocotyle bonariensis were examined by comparing severed and intact clones grown across multiple resource gradients. Basipetal movement of water, nitrogen and photosynthates was demonstrated to occur between two rhizome branch systems interconnecting hundreds of rame...

journal_title：Oecologia

authors： Evans JP

更新日期：1991-04-01 00:00:00

abstract：:Reciprocal transplant experiments have been used to estimate the probability that negative frequency-dependent selection by natural enemies has occurred in host populations by determining whether pest populations are less adapted to "foreign" (rare) hosts, which originate from a population with which the pests have no...

journal_title：Oecologia

authors： Roy BA

更新日期：1998-06-01 00:00:00

abstract：:Effects of herbicides (Garlone 3A, MCPA, 2,4-D and Krenite) and nitrogen fertilizer (NH4NO3), commonly used in Swedish forestry, on nitrogen fixation (C2H2-reduction) by Peltigera praetextata (Sommerf.) Zopf. (field and laboratory) and its phycobiont Nostoc sp. (laboratory) were studied. The alga was affected by the h...

journal_title：Oecologia

authors： Hällbom L,Bergman B

更新日期：1979-01-01 00:00:00

abstract：:Small marine invertebrates often use sessile organisms as microhabitats, which can provide food sources and/or serve as refugees from predators. Because of the availability of external food items such as epibionts and detritus in the marine environment, these invertebrates may not depend on the sessile organisms as so...

journal_title：Oecologia

authors： Kumagai NH

更新日期：2008-04-01 00:00:00

abstract：:Understanding the effects of invasive plants on native consumers is important because consumer-mediated indirect effects have the potential to alter the dynamics of coexistence in native communities. Invasive plants may promote changes in consumer pressure due to changes in protective cover (i.e., the architectural co...

journal_title：Oecologia

authors： Dutra HP,Barnett K,Reinhardt JR,Marquis RJ,Orrock JL

更新日期：2011-07-01 00:00:00