Effects of the herbivorous minnow, southern redbelly dace (Phoxinus erythrogaster), on stream productivity and ecosystem structure.


:We used field and mesocosm experiments to measure effects of southern redbelly dace (Phoxinus erythrogaster), a grazing minnow, on stream ecosystem structure and function. Ecosystem structure was quantified as algal filament length, algal biomass, size distribution of particulate organic matter (POM), algal assemblage structure, and invertebrate assemblage structure, whereas ecosystem function was based on gross and net primary productivity. Our experiments showed that moderate densities of Phoxinus temporarily reduced mean algal filament length and mean size of POM relative to fishless controls. However, there was no detectable effect on algal biomass or ecosystem primary productivity. Several factors could explain the lack of effect of Phoxinus on primary productivity including increased algal production efficiency in grazed treatments or increased grazing by other organisms in fishless treatments. The inability of Phoxinus to reduce algal biomass and system productivity contrasts with experimental results based on other grazing minnows, such as the central stoneroller (Campostoma anomalum), and questions the generality of grazer effects in stream ecosystems. However, environmental venue and the spatial and temporal scale of ecosystem measurements can greatly influence the outcome of these experiments.






Bertrand KN,Gido KB




Has Abstract


2007-02-01 00:00:00












  • Zooplankton competition promotes trade-offs affecting diapause in rotifers.

    abstract::Facultative diapause should be favoured by natural selection in temporary variable habitats. Diapause patterns are evolutionary constrained because producing diapause is resource demanding, which might have implications for competitive dynamics and competitor coexistence through mechanisms such as the storage effect. ...


    pub_type: 杂志文章


    authors: Aránguiz-Acuña A,Ramos-Jiliberto R,Serra M

    更新日期:2015-01-01 00:00:00

  • Predicting understorey structure from the presence and composition of canopies: an assembly rule for marine algae.

    abstract::Assembly rules provide a useful framework for predicting patterns of community assembly under defined environmental conditions. Habitat created by canopy-forming algae (such as kelps) provides a promising system for identifying assembly rules because canopies typically have a large and predictable influence on underst...


    pub_type: 杂志文章


    authors: Irving AD,Connell SD

    更新日期:2006-06-01 00:00:00

  • From forest to fragment: compositional differences inside coastal forest moth assemblages and their environmental correlates.

    abstract::Patterns of β-diversity can provide insight into forces shaping community assembly. We analyzed species-rich insect assemblages in two reserve fragments that had once been part of one contiguous Mediterranean coastal pine forest. Local environments are still similar across both fragments, but their landscape context d...


    pub_type: 杂志文章


    authors: Uhl B,Wölfling M,Fiedler K

    更新日期:2021-02-01 00:00:00

  • Factors limiting the intertidal distribution of the mangrove species Xylocarpus granatum.

    abstract::The tree species Xylocarpus granatum is commonly described as occurring in the upper intertidal zone of mangrove forests, but mature trees are occasionally found at lower elevations. In the Utwe River basin, on the Pacific island of Kosrae, we investigated the relative importance of several biotic and abiotic factors ...


    pub_type: 杂志文章


    authors: Allen JA,Krauss KW,Hauff RD

    更新日期:2003-03-01 00:00:00

  • Patchiness and compensatory growth in a fungus-Collembola system.

    abstract::The compensatory growth potential of a grazed fungal biomass was mathematically expressed as a function of patchiness in its distribution and demonstrated in an experiment using the fungivorous collembolan Onychiurus armatus and the soil fungi Verticillium bulbillosum and Penicillium spinulosum. The model addresses th...


    pub_type: 杂志文章


    authors: Bengtsson G,Hedlund K,Rundgren S

    更新日期:1993-03-01 00:00:00

  • Nutrient dynamics in small mesotrophic fens surrounded by cultivated land : I. Productivity and nutrient uptake by the vegetation in relation to the flow of eutrophicated ground water.

    abstract::In a typical Dutch polder landscape the effects of nutrient transport from cultivated grassland to mesotrophic fen communities were studied. In a comparative approach, biomass production and nutrient (N, P and K) uptake were determined monthly in four fens and a hayfield differeing in productivity and species composit...


    pub_type: 杂志文章


    authors: Verhoeven JT,van Beek S,Dekker M,Storm W

    更新日期:1983-10-01 00:00:00

  • Blade life span, structural investment, and nutrient allocation in giant kelp.

    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,...


    pub_type: 杂志文章


    authors: Rodriguez GE,Reed DC,Holbrook SJ

    更新日期:2016-10-01 00:00:00

  • Comments on relationships between native seed preferences of shrub-steppe granivores and seed nutritional characteristics.

    abstract::Kelrick et al. (1986) argued that seed preferences of desert granivores are strongly influenced by soluble carbohydrate contents of native seed species. They assumed that bitterbrush (Purshia tridentata) seeds are eaten in their entirety by rodents, but in fact these granivores eat only embryos of bitterbrush seeds. E...


    pub_type: 杂志文章


    authors: Jenkins SH

    更新日期:1988-04-01 00:00:00

  • Long-term density-dependent changes in habitat selection in red deer (Cervus elaphus).

    abstract::Understanding how habitat selection changes with population density is a key concept in population regulation, community composition and managing impacts on biodiversity and ecosystem services. At low density, it is expected that individuals select habitats in terms of their preference, but as population density incre...


    pub_type: 杂志文章


    authors: Pérez-Barbería FJ,Hooper RJ,Gordon IJ

    更新日期:2013-11-01 00:00:00

  • Food preferences by Octodon degus (Rodentia caviomorpha): Their role in the chilean matorral composition.

    abstract::The food preferences of Octodon degus are examined in laboratory test. Results indicate that degus prefer new rather than mature leaves of Chilean matorral shrubs, and that degus do not discriminate between new leaves (equivalents of shrub seedlings) of different shrub species. The significance of degus preferences in...


    pub_type: 杂志文章


    authors: Simonetti JA,Montenegro G

    更新日期:1981-01-01 00:00:00

  • Leaf stable isotopes suggest shared ancestry is an important driver of functional diversity.

    abstract::Plant physiological strategies of carbon (C) and nitrogen (N) uptake and metabolism are often regarded as outcomes of environmental selection. This is likely true, but the role of evolutionary history may also be important in shaping patterns of functional diversity. Here, we used leaf C and N stable isotope ratios (δ...


    pub_type: 杂志文章


    authors: Goud EM,Sparks JP

    更新日期:2018-08-01 00:00:00

  • Influence of forest type and tree species on canopy ants (Hymenoptera: Formicidae) in Budongo Forest, Uganda.

    abstract::The arboreal ant fauna was investigated in Budongo Forest, a seasonal rain forest in Uganda, using the insecticidal fogging technique. Ants were collected from 61 trees, between 7 and 33 m in height, belonging to four tree species. Trees were growing in adjacent plots of forests characterized by different use and stru...


    pub_type: 杂志文章


    authors: Schulz A,Wagner T

    更新日期:2002-10-01 00:00:00

  • Plant interactions for pollinator visits: a test of the magnet species effect.

    abstract::From 1985-1987, patterns of fruit and seed set were studied in a population of mayapple (Podophyllum peltatum), a clonal, self-incompatible herb found in deciduous woods in eastern North America. Mayapple flowers do not produce nectar, but depend on infrequent visits by nectar-seeking queen bumble bees for pollination...


    pub_type: 杂志文章


    authors: Laverty TM

    更新日期:1992-04-01 00:00:00

  • Diversity matters: how bees benefit from different resin sources.

    abstract::Biodiverse environments provide a variety of resources that can be exploited by consumers. While many studies revealed a positive correlation between biodiversity and consumer biomass and richness, only few studies have investigated how resource diversity affects single consumers. To better understand whether a single...


    pub_type: 杂志文章


    authors: Drescher N,Wallace HM,Katouli M,Massaro CF,Leonhardt SD

    更新日期:2014-12-01 00:00:00

  • Effects of habitat disruption on the activity of nectarivorous bats (Chiroptera: Phyllostomidae) in a dry tropical forest: implications for the reproductive success of the neotropical tree Ceiba grandiflora.

    abstract::In the tropical dry forest of the central Pacific coast of Mexico the pollination and reproductive success of the bombacaceous tree Ceiba grandiflora was negatively affected by habitat disruption. Two of the three bat species that function as effective pollinators for this species ( Glossophaga soricina and Musonycter...


    pub_type: 杂志文章


    authors: Quesada M,Stoner KE,Rosas-Guerrero V,Palacios-Guevara C,Lobo JA

    更新日期:2003-05-01 00:00:00

  • Density- and size-dependent mortality of a settling coral-reef damselfish (Pomacentrus moluccensis Bleeker).

    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...


    pub_type: 杂志文章


    authors: Brunton BJ,Booth DJ

    更新日期:2003-11-01 00:00:00

  • The relative importance of allelopathy in interference: the effects of an invasive weed on a native bunchgrass.

    abstract::The relative importance of allelopathy and resource competition in plant-plant interactions has been vigorously debated but seldom tested. We used activated carbon to manipulate the effects of root exudates of Centaurea maculosa, a noxious weed in much of western North America, on root elongation rates and growth of t...


    pub_type: 杂志文章


    authors: Ridenour WM,Callaway RM

    更新日期:2001-02-01 00:00:00

  • Effects of microhabitat, time of day, and weather on predation of gypsy moth larvae.

    abstract::Wire cages with different-sized meshes were placed on trunks and around leaves at different heights in oak trees and in forest litter. Gypsy moth, Lymantria dispar, instars II-V tethered with threads were placed in each cage (instars II-III only in leaf cages) as well as outside the cages. Predation of larvae decrease...


    pub_type: 杂志文章


    authors: Weseloh RM

    更新日期:1988-11-01 00:00:00

  • Stable carbon isotope analysis of soil organic matter illustrates vegetation change at the grassland/woodland boundary in southeastern Arizona, USA.

    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...


    pub_type: 杂志文章


    authors: McPherson GR,Boutton TW,Midwood AJ

    更新日期:1993-02-01 00:00:00

  • Seasonal changes in photosynthetic characteristics of Anemone raddeana, a spring-active geophyte, in the temperate region of Japan.

    abstract::Seasonal changes in the photosynthetic characteristics of intact involucral leaves of Anemone raddeana were investigated under laboratory conditions. Net photosynthesis and constant water vapor pressure deficit showed almost the same seasonal trend. They increased rapidly from mid-April immediately after unfolding of ...


    pub_type: 杂志文章


    authors: Yoshie F,Yoshida S

    更新日期:1987-05-01 00:00:00

  • Aggressive behavior of adult meadow voles (Microtus pennsylvanicus) towards young.

    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 ...


    pub_type: 杂志文章


    authors: Boonstra R

    更新日期:1984-04-01 00:00:00

  • Influence of digestive morphology on resource partitioning in Amazonian ungulates.

    abstract::Resource partitioning of diet and habitat use was studied in the entire Amazonian ungulate community of Northeastern Peru, which comprises the red brocket deer (Mazama americana), grey brocket deer (M. gouazoubira), collared peccary (Tayassu tajacu), white-lipped peccary (T. pecari), and lowland tapir (Tapirus terrest...


    pub_type: 杂志文章


    authors: Bodmer RE

    更新日期:1991-01-01 00:00:00

  • Growing and shrinking in the smallest tortoise, Homopus signatus signatus: the importance of rain.

    abstract::Climate change models predict that the range of the world's smallest tortoise, Homopus signatus signatus, will aridify and contract in the next decades. To evaluate the effects of annual variation in rainfall on the growth of H. s. signatus, we recorded annual growth rates of wild individuals from spring 2000 to sprin...


    pub_type: 杂志文章


    authors: Loehr VJ,Hofmeyr MD,Henen BT

    更新日期:2007-08-01 00:00:00

  • The significance of pollination time and frequency and of purity of pollen loads for seed set in Rhinanthus angustifolius (Scrophulariaceae) and Viscaria vulgaris (Caryophyllaceae).

    abstract::The effects of time of the day and frequency of application and of purity of artificially deposited pollen loads on fruiting and seed set were studied in Rhinanthus angustifolius (diurnally visited by bumblebees) and Viscaria vulgaris (diurnally visited by bumblebees, nocturnally by sphingid moths).Time of the day did...


    pub_type: 杂志文章


    authors: Kwak MM,Jennersten O

    更新日期:1986-11-01 00:00:00

  • The effect of proboscis and corolla tube lengths on patterns and rates of flower visitation by bumblebees.

    abstract::The rates at which bumblebees of different proboscis lengths forage on flowers of a series of corolla tube lengths were determined. The results indicate significant correlations between proboscis length and time spent by bees on flowers. Bumblebees of long proboscis length can forage significantly faster than bees of ...


    pub_type: 杂志文章


    authors: Inouye DW

    更新日期:1980-05-01 00:00:00

  • Competition with stone crabs drives juvenile spiny lobster abundance and distribution.

    abstract::Interspecific competition is assumed to have a strong influence on the population dynamics of competing species, but is not easily demonstrated for mobile species in the wild. In the Florida Keys (USA), anecdotal observations have long pointed to an inverse relationship in abundance of two large decapod crustaceans fo...


    pub_type: 杂志文章


    authors: Behringer DC,Hart JE

    更新日期:2017-05-01 00:00:00

  • Variation in a sparrow's reproductive success with rainfall: food and predator-mediated processes.

    abstract::From 1997 to 1999, we monitored the reproductive success of individual rufous-crowned sparrows (Aimophila ruficeps) in coastal sage scrub habitat of southern California, USA. Annual reproductive output of this ground-nesting species varied strongly with annual variation in rainfall, attributed to the El Niño-Southern ...


    pub_type: 杂志文章


    authors: Morrison SA,Bolger DT

    更新日期:2002-11-01 00:00:00

  • Leaf isoprene emission as a trait that mediates the growth-defense tradeoff in the face of climate stress.

    abstract::Plant isoprene emissions are known to contribute to abiotic stress tolerance, especially during episodes of high temperature and drought, and during cellular oxidative stress. Recent studies have shown that genetic transformations to add or remove isoprene emissions cause a cascade of cellular modifications that inclu...


    pub_type: 杂志文章


    authors: Monson RK,Weraduwage SM,Rosenkranz M,Schnitzler JP,Sharkey TD

    更新日期:2021-01-08 00:00:00

  • Ant behaviour and seed morphology: a missing link of myrmecochory.

    abstract::Seed dispersal by ants (myrmecochory) is mediated by the presence of a lipid-rich appendage (elaiosome) on the seed that induces a variety of ants to collect the diaspores. When seeds mature or fall onto the ground, these ant species transport them to their nest. After eating the elaiosome, the seed is discarded in ne...


    pub_type: 杂志文章


    authors: Gómez C,Espadaler X,Bas JM

    更新日期:2005-12-01 00:00:00

  • Contrary choices: possible exploitation of enemy-free space by herbivorous insects in cultivated vs. wild crucifers.

    abstract::The pressure to escape natural enemies may shape how herbivorous insects use their plant resources. On wild crucifers, ovipositional preferences of the diamondback moth (Plutella xylostella; DBM) were similar to searching preferences of its main parasitoid, an ichneumonid wasp (Diadegma insulare). But on cultivated cr...


    pub_type: 杂志文章


    authors: Fox LR,Eisenbach J

    更新日期:1992-04-01 00:00:00