نتایج جستجو برای: sedges
تعداد نتایج: 288 فیلتر نتایج به سال:
Members of the plant genus Selaginella (de Beauvois 1805) have few known insect herbivores even though they are considered by some to be 'living fossils', with extant taxa virtually indistinguishable from 300 Mya fossils. Butterflies are well-known herbivores, and the satyrs are among the most speciose of them despite having radiated ∼ 35 Mya ago. Nearly all satyrs feed on grass or sedges, but ...
The aim of the study was to use melissopalynology to delineate the foraging preferences of bees in tropical environs. This was done by comparing pollen spectra obtained from the same hives every three months for three years at four sampling locations (in two sites) within a confined landscape mosaic. If melissopalynology is highly replicable, the spatial variation of the pollen spectrum from th...
Accumulating isotopic evidence from fossil hominin tooth enamel has provided unexpected insights into early hominin dietary ecology. Among the South African australopiths, these data demonstrate significant contributions to the diet of carbon originally fixed by C(4) photosynthesis, consisting of C(4) tropical/savannah grasses and certain sedges, and/or animals eating C(4) foods. Moreover, high...
Previous work on holocentric chromosomes in the angiosperm genus Carex demonstrates that many of the traditional sections are marked by different ranges of chromosome number, suggesting phylogenetic autocorrelation. It has been hypothesized that shifting constraints on chromosome rearrangements may limit the potential for hybridization among lineages, promoting speciation. In this study, we eva...
Understanding how fire influences animal behaviour, such as movement and resource selection, is important for ecosystem management because it can improve our capacity to predict species will respond. We assessed microhabitat selection by two small mammals, the bush rat (Rattus fuscipes) agile antechinus (Antechinus agilis), in response a low intensity prescribed fire. used spool line tracking t...
Co-distributed species may exhibit similar phylogeographic patterns due to shared environmental factors or discordant attributed the influence of species-specific traits. Although either concordant could occur chance, stark differences in key traits (e.g., dispersal ability) readily explain between species. Multiple species' attributes affect genetic patterns, and it is difficult isolate contri...
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