Effects of size and growth rate on vegetative reproduction in Typha.

abstract：:The responses of organisms to organic farming depend on the taxonomic group and landscape complexity. Following the intermediate landscape complexity hypothesis, organic farming can compensate for the lack of complexity in simple landscapes. Argentinian farmlands are simple with large fields and scarce linear habitat ...

journal_title：Oecologia

authors： Serafini VN,Coda JA,Contreras F,Conroy MJ,Gomez MD,Priotto JW

更新日期：2019-12-01 00:00:00

abstract：:This is the first study to investigate whether scatter-hoarding behavior, a conditional mutualism, can be disrupted by forest fragmentation. We examined whether acouchies (Myoprocta acouchy, Rodentia) and agoutis (Dasyprocta leporina, Rodentia) changed scatter-hoarding behavior toward seeds of Astrocaryum aculeatum (A...

journal_title：Oecologia

authors： Jorge ML,Howe HF

更新日期：2009-10-01 00:00:00

abstract：:The influence of fluctuating light intensities on phytoplankton composition and diversity was investigated for 49 days under semi-continuous culture conditions with sufficient nutrient supply, using phytoplankton assemblages from Lake Biwa, Japan. Light conditions were either periodically changed from high intensity (...

journal_title：Oecologia

authors： Flöder S,Urabe J,Kawabata ZI

更新日期：2002-11-01 00:00:00

abstract：:There is considerable theoretical evidence that a trade-off between competitive and colonization ability enables species coexistence. However, empirical studies testing for the presence of a competition-colonization (CC) trade-off and its importance for species coexistence have found mixed results. In a microcosm expe...

journal_title：Oecologia

authors： Limberger R,Wickham SA

更新日期：2011-11-01 00:00:00

abstract：:We used a complete block design to experimentally study direct and indirect interactions in a three trophic-level freshwater system consisting of a top predator, the green sunfish, Lepomis cyanellus, an intermediate predator, small-mouthed salamander larvae, Ambystoma barbouri, and prey, hatchling isopods, Lirceus fon...

journal_title：Oecologia

authors： Huang C,Sih A

更新日期：1991-02-01 00:00:00

abstract：:The illumination level at which the pike (Esox lucius) eats most Leucaspius delineatus was compared to that at which the school of Leucaspius disperses.The pike easts Leucaspius predominantly when there is little light (50-75% of its entire prey at less than 1 Lux).The school of Leucaspius gradually disperses at less ...

journal_title：Oecologia

authors： Dobler E

更新日期：1977-03-01 00:00:00

abstract：:Selection of sites for oviposition when the risk of predation by green frogs was variable studied in tandems of the damselfly Pyrrhosoma nymphula. In the absence of predators the number of tandems landing increased with the size of the oviposition site and with the number of pairs already present. Pairs approaching an...

journal_title：Oecologia

authors： Rehfeldt GE

更新日期：1990-12-01 00:00:00

abstract：:Fungal feeding soil invertebrates feed on a wide spectrum of fungal species suggesting that mixed diets increase fitness. We investigated relationships between food preferences for seven saprophytic fungal species/forms and fitness parameters (mortality, growth, time to reproduction, reproduction, egg size) in two Col...

journal_title：Oecologia

authors： Scheu S,Simmerling F

更新日期：2004-05-01 00:00:00

abstract：:Climate change does affect not only average rainfall and temperature but also their variation, which can reduce the predictability of suitable conditions for growth and reproduction. This situation is problematic for inhabitants of temporary waters whose reproductive success depends on rainfall and evaporation that de...

journal_title：Oecologia

authors： Pinceel T,Vanschoenwinkel B,Hawinkel W,Tuytens K,Brendonck L

更新日期：2017-05-01 00:00:00

abstract：:Every summer the deepest parts of the inner Flensburg fjord are subject to O2-deficiency lasting from a few weeks to several months. In spring, however, populations of Metridium senile can be found in these areas, in spite of the fact that frequently the local anoxic period of the previous summer has been 2-3 times lo...

journal_title：Oecologia

authors： Wahl M

更新日期：1985-09-01 00:00:00

abstract：:Sources of variation in floral nectar production were investigated in a natural population of Epilobium canum (Onagraceae), a hummingbird-pollinated herbaceous shrub. Field measurements showed significant phenotypic variation among plants in floral nectar production rates. Average variance among flowers within plants ...

journal_title：Oecologia

authors： Boose DL

更新日期：1997-05-01 00:00:00

abstract：:Although it is well-documented from theoretical studies that pathogens have the capacity to generate cycles, the occurrence and role of pathogens and disease have been poorly empirically studied in cyclic voles and lemmings. In screening for the occurrence of disease in cyclic vole and lemming populations, we found th...

journal_title：Oecologia

authors： Niklasson B,Nyholm E,Feinstein RE,Samsioe A,Hörnfeldt B

更新日期：2006-11-01 00:00:00

abstract：:The purpose of this research was to investigate the influence of nitrogen availability on growth and the patterns of dry matter and nitrogen allocation of the dune grasses Ammophila arenaria and Elymus mollis. Plants were grown from rhizome segments under near-ambient coastal conditions and received either high or low...

journal_title：Oecologia

authors： Pavlik BM

更新日期：1983-03-01 00:00:00

abstract：:Optimal diet theory often fails to predict a forager's diet choice when prey are mobile. Because they escape or defend themselves, mobile prey are likely to increase the forager's handling time, thereby decreasing its fitness gain rate. Many animals have been shown to select their prey so as to maximize either their f...

journal_title：Oecologia

authors： Barrette M,Wu GM,Brodeur J,Giraldeau LA,Boivin G

更新日期：2009-01-01 00:00:00

abstract：:Hemiepiphytic species in the genera Clusia and Ficus were investigated to study their mode of photosynthetic metabolism when growing under natural conditions. Despite growing sympatrically in many areas and having the same growth habit, some Clusia species show Crassulacean acid metabolism (CAM) whereas all species of...

journal_title：Oecologia

authors： Ting IP,Hann J,Holbrook NM,Putz FE,Sternberg LD,Price D,Goldstein G

更新日期：1987-12-01 00:00:00

abstract：:The diurnal course of the xylem water flow in a solitary Salix fragilis L. tree in a wet grassland was measured using the tissue heat-balance method. There was considerable variation due to meteorological factors. Maximum flow rate was 0.4 kg h-1 m-2 of crown projection area, or 5.9 kg h-1 kg-1 leaf dry weight. The da...

journal_title：Oecologia

authors： Čermák J,Jeník J,Kučera J,Žídek V

更新日期：1984-10-01 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

abstract：:This study examines the idea that variation in forelimb length among male anurans influences reproductive success, and does so independently of body size. Analyses of covariance and multivariate analyses of morphological data for five species of explosives breeders are used to test the prediction that for species in w...

journal_title：Oecologia

authors： Lee JC

更新日期：1986-05-01 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：:Temperature regulation and oxygen consumption were examined in two species of grasshoppers: Melanoplus sanguinipes from cold alpine tundra at elevation 3,800 m, and Trimerotropis pallidipennis from hot desert habitats at elevation 250 m. Both species utilized behavioral thermoregulation to keep body temperature (T b )...

journal_title：Oecologia

authors： Chappell MA

更新日期：1983-01-01 00:00:00

abstract：:Parasites often produce large numbers of offspring within their hosts. High parasite burdens are thought to be important for parasite transmission, but can also lower host fitness. We studied the protozoan Ophryocystis elektroscirrha, a common parasite of monarch butterflies (Danaus plexippus), to quantify the benefit...

journal_title：Oecologia

authors： de Roode JC,Chi J,Rarick RM,Altizer S

更新日期：2009-08-01 00:00:00

abstract：:Variation in plant resistance to pathogen infection is commonly observed in interactions between wild plants and their foliar pathogens. Models of host-pathogen interactions indicate that a large cost of infection is generally necessary to maintain this variation, yet there is limited evidence that foliar pathogens ca...

journal_title：Oecologia

authors： Goss EM,Bergelson J

更新日期：2007-05-01 00:00:00

abstract：:Soil nutrient availability directly enhances vegetative growth, flowering, and fruiting in alpine ecosystems. However, the impacts of nutrient addition on pollinator visitation, which could affect seed output indirectly, are unknown. In a nutrient addition experiment, we tested the hypothesis that seed output in the i...

journal_title：Oecologia

authors： Muñoz AA,Celedon-Neghme C,Cavieres LA,Arroyo MT

更新日期：2005-03-01 00:00:00

abstract：:Recent work suggests that soil nutrient heterogeneity may modulate plant responses to drivers of global change, but interactions between N heterogeneity and changes in rainfall regime remain poorly understood. We used a model grassland system to investigate the interactive effects of N application pattern (homogeneous...

journal_title：Oecologia

authors： Xi N,Carrère P,Bloor JM

更新日期：2015-06-01 00:00:00

abstract：:The duration and amount of water captured on leaves and its functional significance is highly varied. Leaf surface wettability influences water absorption, gas exchange, pathogen infection, nutrient leaching, contamination by pollutants, self-cleaning properties and in freezing environments the probability of extrinsi...

journal_title：Oecologia

authors： Aryal B,Neuner G

更新日期：2010-01-01 00:00:00

abstract：:Mediterranean evergreen forests of Corsica are characterized by relatively high species diversity of arthropods with low population densities. Food is never superabundant for Corsican blue tits Parus caeruleus. This study focused on the composition of the food of blue tit nestlings and especially on two main component...

journal_title：Oecologia

authors： Bańbura J,Blondel J,de Wilde-Lambrechts H,Galan MJ,Maistre M

更新日期：1994-12-01 00:00:00

abstract：:One of the most commonly cited hypotheses explaining invasion success is the enemy release hypothesis (ERH), which maintains that populations are regulated by coevolved natural enemies where they are native but are relieved of this pressure in the new range. However, the role of resident enemies in plant invasion rema...

journal_title：Oecologia

authors： Bohl Stricker K,Stiling P

更新日期：2014-03-01 00:00:00

abstract：:Carbon allocation demands from root-nodulating nitrogen-fixing bacteria (NFB) can modulate the host plant's chemical phenotype, with strong bottom-up effects on herbivores. In contrast to well-studied rhizobia, the effects of other important NFB on plant chemistry and herbivory are much less understood. Here, combinin...

journal_title：Oecologia

authors： Ballhorn DJ,Elias JD,Balkan MA,Fordyce RF,Kennedy PG

更新日期：2017-06-01 00:00:00

abstract：:1. The locomotor activity of European salamanders differs from species to species. At all stages of development Triturus vulgaris is more light-active, Salamandra salamandra is dark-active, while Triturus alpestris and cristatus occupy an intermediate position. 2. The activity of the larvae is high but the rhythm is n...

journal_title：Oecologia

authors： Himstedt W

更新日期：1971-06-01 00:00:00

abstract：:The study presents a data set of above-ground biomass (AGB), structure, spacing and fire regime, for 24 stands of pristine Siberian Scots pine (Pinus sylvestris) forests with lichens (n = 20) or Vaccinium/mosses (n = 4) as ground cover, along four chronosequences. The stands of the "lichen" site type (LT) were stratif...

journal_title：Oecologia

authors： Wirth C,Schulze ED,Schulze W,von Stünzner-Karbe D,Ziegler W,Miljukova IM,Sogatchev A,Varlagin AB,Panvyorov M,Grigoriev S,Kusnetzova W,Siry M,Hardes G,Zimmermann R,Vygodskaya NN

更新日期：1999-10-01 00:00:00