Results 21 to 30 of about 105,734 (160)

Estimating macrobenthic secondary production from body weight and biomass: a field test in a non-boreal intertidal habitat [PDF]

open access: yes, 1993
Production (P) and biomass (B) data of different species from 3 stations in the intertidal zone of the Ria Formosa (southern Portugal, 37-degrees-N) were analysed.
Sprung, Martin
core   +1 more source

How self-regulation, the storage effect and their interaction contribute to coexistence in stochastic and seasonal environments [PDF]

open access: yes, 2019
Explaining coexistence in species-rich communities of primary producers remains a challenge for ecologists because of their likely competition for shared resources.
Barraquand, Frederic, Picoche, Coralie
core   +2 more sources

Evidence for Genetic Hybridization between Released and Wild Game Birds: Phylogeography and Genetic Structure of Chukar Partridge, Alectoris chukar, in Turkey

open access: yesDiversity, 2022
The Chukar Partridge (Alectoris chukar, Galliformes) is one of the most important game birds in its native range, spanning from the Balkans to eastern Asia, and the regions of Europe, North America and New Zealand where it was introduced.
Tamer Albayrak   +5 more
doaj   +1 more source

Divergent drivers of leaf trait variation within species, among species, and among functional groups. [PDF]

open access: yes, 2018
Understanding variation in leaf functional traits-including rates of photosynthesis and respiration and concentrations of nitrogen and phosphorus-is a fundamental challenge in plant ecophysiology. When expressed per unit leaf area, these traits typically
Katabuchi, Masatoshi   +9 more
core   +3 more sources

Lack of genetic structure suggests high connectivity of Parnassius phoebus between nearby valleys in the Alps [PDF]

open access: yesAlpine Entomology, 2022
The spatial scale of intraspecific genetic connectivity and population structure are important aspects of conservation genetics. However, for many species these properties are unknown.
Andreas Jaun   +2 more
doaj   +3 more sources

Isotopic niche variability in macroconsumers of the East Scotia Ridge (Southern Ocean) hydrothermal vents: What more can we learn from an ellipse? [PDF]

open access: yes, 2016
Aspects of between-individual trophic niche width can be explored through the isotopic niche concept. In many cases isotopic variability can be influenced by the scale of sampling and biological characteristics including body size or sex.
McGill, R.A.R.   +4 more
core   +2 more sources

Competition, mortality, and development of spatial patterns in two Cantabrian populations of Fagus sylvatica L. (Fagaceae)

open access: yesAnales del Jardín Botánico de Madrid, 2000
In this paper the spatial patterns of size and mortality of European beech (Fagus sylvatica L.) were analy sed in two deciduous forest plots of Northern Spain. ¿i general terms, radial growth of F.
Vicente Rozas   +1 more
doaj   +1 more source

To the intraspecific structure of Carabus (Morphocarabus) brinevi Kabak, 2014 (Coleoptera: Carabidae) [PDF]

open access: yesКавказский энтомологический бюллетень, 2021
The intraspecific structure of Carabus (Morphocarabus) brinevi Kabak, 2014 from Chinese part of the Mongolian Altai Mountain Range is discussed. A new subspecies is described – C. brinevi kanasensis subsp. n.
I.I. Kabak
doaj   +1 more source

Reproductive isolation between two populations of Aglaoctenus lagotis , a funnel-web wolf spider [PDF]

open access: yes, 2015
Aglaoctenus lagotis (Lycosidae: Sosippinae) is a spider that, in contrast to the predominant wandering habit of the family, constructs funnel webs.
Aisenberg   +86 more
core   +1 more source

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