نتایج جستجو برای: abundance of tolerant taxa eg chironomidae

تعداد نتایج: 21174288  

2014
M.P.D. Garratt D.J. Coston C.L. Truslove M.G. Lappage C. Polce R. Dean J.C. Biesmeijer S.G. Potts

Insect pollinated mass flowering crops are becoming more widespread and there is a need to understand which insects are primarily responsible for the pollination of these crops so conservation measures can be appropriately targeted in the face of pollinator declines. This study used field surveys in conjunction with cage manipulations to identify the relative contributions of different pollinat...

2014
Francisco Aviles-Jimenez Flor Vazquez-Jimenez Rafael Medrano-Guzman Alejandra Mantilla Javier Torres

We aimed to characterize microbiota of the gastric mucosa as it progress to intestinal type of cancer. Study included five patients each of non-atrophic gastritis (NAG), intestinal metaplasia (IM) and intestinal-type gastric cancer (GC). Gastric tissue was obtained and DNA extracted for microbiota analyses using the microarray G3 PhyloChip. Bacterial diversity ranged from 8 to 57, and steadily ...

Journal: :International journal for parasitology 2013
Nikolaos Fytilis Donna M Rizzo Ryan D Lamb Billie L Kerans Lori Stevens

Aquatic oligochaetes have long been appreciated for their value in assessing habitat quality because they are ubiquitous sediment-dwelling filter feeders. Many oligochaete taxa are also important in the transmission of fish diseases. Distinguishing resistant and susceptible taxa is important for managing fish disease, yet challenging in practice. Tubifex tubifex (Oligochaeta: Tubificidae) is th...

2012
Peter H. F. Hobbelen Michael D. Samuel Dennis A. LaPointe Carter T. Atkinson

Avian malaria is an important cause of the decline of endemic Hawaiian honeycreepers. Because of the complexity of this disease system we used a computer model of avian malaria in forest birds to evaluate how two proposed conservation strategies: 1) reduction of habitat for mosquito larvae and 2) establishment of a low-elevation, malaria-tolerant honeycreeper (Hawaii Amakihi) to mid-elevation f...

2017
Sarah E Macdonald Matthew J Nolan Kimberley Harman Kay Boulton David A Hume Fiona M Tomley Richard A Stabler Damer P Blake

Eimeria species cause the intestinal disease coccidiosis, most notably in poultry. While the direct impact of coccidiosis on animal health and welfare is clear, its influence on the enteric microbiota and by-stander effects on chicken health and production remains largely unknown, with the possible exception of Clostridium perfringens (necrotic enteritis). This study evaluated the composition a...

2014
Melinda J. Ellison Gavin C. Conant Rebecca R. Cockrum Kathy J. Austin Huan Truong Michela Becchi William R. Lamberson Kristi M. Cammack

We surveyed the ruminal metagenomes of 16 sheep under two different diets using Illumina pair-end DNA sequencing of raw microbial DNA extracted from rumen samples. The resulting sequence data were bioinformatically mapped to known prokaryotic 16S rDNA sequences to identify the taxa present in the samples and then analysed for the presence of potentially new taxa. Strikingly, the majority of the...

Journal: :Philosophical transactions of the Royal Society of London. Series B, Biological sciences 2004
Francis E Mayle David J Beerling William D Gosling Mark B Bush

The aims of this paper are to review previously published palaeovegetation and independent palaeoclimatic datasets together with new results we present from dynamic vegetation model simulations and modern pollen rain studies to: (i) determine the responses of Amazonian ecosystems to changes in temperature, precipitation and atmospheric CO2 concentrations that occurred since the last glacial max...

2005
ANDREW J. BROOKS

1. The influence of hydraulic conditions on the spatial distribution of macroinvertebrate assemblages was investigated in three riffles in a perennial Australian river. 2. Velocity, depth and variability of substrate roughness were measured at each of 56 macroinvertebrate sampling locations. Complex hydraulic variables (roughness Reynolds number, shear velocity, Froude number) were calculated f...

2016
Artur Obidziński Piotr Mędrzycki Ewa Kołaczkowska Wojciech Ciurzycki Katarzyna Marciszewska

Invasive Alien Plants occur in numbers differing by orders of magnitude at subsequent invasion stages. Effective sampling and quantifying niches of rare invasive plants are quite problematic. The aim of this paper is an estimation of the influence of invasive plants frequency on the explanation of their local abundance. We attempted to achieve it through: (1) assessment of occurrence of self-re...

2017
Iliana Bista Gary R. Carvalho Kerry Walsh Mathew Seymour Mehrdad Hajibabaei Delphine Lallias Martin Christmas Simon Creer

The use of environmental DNA (eDNA) in biodiversity assessments offers a step-change in sensitivity, throughput and simultaneous measures of ecosystem diversity and function. There remains, however, a need to examine eDNA persistence in the wild through simultaneous temporal measures of eDNA and biota. Here, we use metabarcoding of two markers of different lengths, derived from an annual time s...

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