Population Ecology

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Conflicting intersexual mate choices maintain interspecific sexual interactions
Population Ecology - Tập 57 - Trang 261-271 - 2015
Koh-Ichi Takakura, Takayoshi Nishida, Keisuke Iwao
Reproductive interference, interspecific sexual interactions that affect reproductive success, is found in various taxa and has been considered as a fundamental source of reproductive character displacement (RCD). Once RCD has occurred, persistent interspecific sexual interactions between species pairs are expected to diminish. However, reproductive interference has been reported from some species...... hiện toàn bộ
Are there genetically controlled habitat-specific differences in spatial aggregation of drosophilids?
Population Ecology - Tập 46 - Trang 269-274 - 2004
Marko Rohlfs, Thomas S. Hoffmeister
Variation in spatial patterns of competing organisms is of fundamental importance for community and population processes. Yet the mechanisms controlling subjects like the degree of spatial aggregation in competing insect larvae across fragmented resources have rarely been addressed. In the present study, we tested for systematic differences in the spatial distribution patterns of Drosophila subobs...... hiện toàn bộ
How does spatio-temporal disturbance influence species diversity in a hierarchical competitive system? Prospective order of species coexistence and extinction
Population Ecology - - 2003
Kyoko Ohsawa, Kohkichi Kawasaki, Fugo Takasu, Nanako Shigesada
To address how habitat destruction and hierarchical competition among species affect the spatio-temporal dynamics of a multi-species community, we present a compartment model in which multiple species undergo dispersal and competitive interactions in a patchy habitat arranged in a two-dimensional lattice. We assume that disturbances are periodically imposed on some parts of the lattice in a block,...... hiện toàn bộ
Different population responses of three sympatric rodent species to acorn masting—the role of tannin tolerance
Population Ecology - Tập 59 - Trang 29-43 - 2017
Rokuya Onodera, Yuka Akimoto, Takuya Shimada, Takashi Saitoh
Rodent population dynamics are predicted to respond positively to the masting of acorns, but diverging results have been published. This study tested the hypothesis that population responses to acorn masting vary depending on differences in the tolerance to tannins of different rodent species. The effects of acorn abundance on the rodent population densities were analyzed using a dataset obtained ...... hiện toàn bộ
Dispersal and habitat cuing of Eurasian red squirrels in fragmented habitats
Population Ecology - Tập 52 - Trang 527-536 - 2010
Lucas Armand Wauters, Goedele Verbeylen, Damiano Preatoni, Adriano Martinoli, Erik Matthysen
Animal dispersal and subsequent settlement is a key process in the life history of many organisms, when individuals use demographic and environmental cues to target post-dispersal habitats where fitness will be highest. To investigate the hypothesis that environmental disturbance (habitat fragmentation) may alter these cues, we compared dispersal patterns of 60 red squirrels (Sciurus vulgaris) in ...... hiện toàn bộ
Tiller population dynamics of reciprocally transplanted Eriophorum vaginatum L. ecotypes in a changing climate
Population Ecology - Tập 57 - Trang 117-126 - 2014
Jennifer L. Chandler, James B. McGraw, Cynthia Bennington, Gaius R. Shaver, Milan C. Vavrek, Ned Fetcher
Moist tussock tundra, dominated by the sedge Eriophorum vaginatum L., covers approximately 3.36 × 108 km2 of arctic surface area along with large amounts of subarctic land area. Eriophorum vaginatum exhibits ecotypic differentiation along latitudinal gradients in Alaska. While ecotypic differentiation may be beneficial during periods of climate stability, it may be detrimental as climate changes, ...... hiện toàn bộ
Toads in the backyard: why do invasive cane toads (Rhinella marina) prefer buildings to bushland?
Population Ecology - Tập 58 - Trang 293-302 - 2016
Edna González-Bernal, Matthew J. Greenlees, Gregory P. Brown, Richard Shine
Like many invasive species, cane toads (Rhinella marina) in Australia concentrate in the disturbed habitats created by human activity, rather than in pristine areas. We surveyed cane toads in the wet–dry tropics of the Northern Territory to assess the abundances, body sizes, sexes, behaviour, hydration state and feeding rates of toads around buildings compared to those in areas remote from buildin...... hiện toàn bộ
Conspecific host discrimination by ovipositing Euphydryas editha butterflies: Its nature and its consequences for offspring survivorship
Population Ecology - Tập 27 Số 1 - Trang 87-98 - 1985
Duncan A. Mackay
SummaryOvipositing E. editha butterflies display post‐alighting discrimination among patches of Collinsia torreyi, one of their major hosts in the General's Highway (GH) population at a montane site in California. Females tended to accept (i.e. oviposit on) dense patches of this host and to reject sparse patches...... hiện toàn bộ
Density dependence in northern ungulates: interactions with predation and resources
Population Ecology - Tập 51 - Trang 123-132 - 2008
Guiming Wang, N. Thompson Hobbs, Saran Twombly, Randall B. Boone, Andrew W. Illius, Iain J. Gordon, John E. Gross
Variation in the abundance of animals has traditionally been explained as the outcome of endogenous forcing from density dependence and exogenous forcing arising from variation in weather and predation. Emerging evidence suggests that the effects of density dependence interact with external influences on population dynamics. In particular, spatial heterogeneity in resources and the presence of cap...... hiện toàn bộ
Effects of short‐duration sub‐optimum pre‐oviposition temperatures on progeny production and sex ratio in species of Aphytis (Hymenoptera: Aphelinidae)
Population Ecology - Tập 8 Số 1 - Trang 69-77 - 1966
Paul DeBach, L. C. Argyriou
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