A5058422406- Plant and animal studies
- Ecology and Vegetation Dynamics Studies
- Species Distribution and Climate Change
- Diptera species taxonomy and behavior
- Insect and Arachnid Ecology and Behavior
- Insect and Pesticide Research
- Animal Ecology and Behavior Studies
- Animal Behavior and Reproduction
- Insect behavior and control techniques
- Wildlife Ecology and Conservation
- Insect-Plant Interactions and Control
- Parasite Biology and Host Interactions
- Parasites and Host Interactions
- Helminth infection and control
- Plant Parasitism and Resistance
- Entomological Studies and Ecology
- Forest Insect Ecology and Management
- Genetic diversity and population structure
- Lepidoptera: Biology and Taxonomy
- Forest Ecology and Biodiversity Studies
- Animal and Plant Science Education
- Insect Pest Control Strategies
- Botany, Ecology, and Taxonomy Studies
- Forensic Entomology and Diptera Studies
- Bird parasitology and diseases
University of Nottingham
2016-2025
Royal Astronomical Society
2022-2024
Park University
2023
Universidad Nacional Autónoma de México
2022
Hanby Environmental (United States)
2022
Institute of Entomology
2005-2022
John Wiley & Sons (United Kingdom)
1895-2022
Google (United States)
2016
Egyptian Ministry of Environment
2009
Swarthmore College
2007
The experimental fragmentation of landscapes a natural ecosystem resulted in declines the abundance and distribution most species multispecies animal community inhabiting extinction many species. These caused deterioration positive interspecific relation between local population distributional extent this community. However, when patches were connected by habitat corridors, an immigration "rescue effect" arrested both maintained observed them. results demonstrate importance metapopulation...
The development of the equilibrium theory island biogeography and its basic concepts are outlined. Studies purporting to validate critically examined, it is concluded that there little support for tenets. application nature conservation ecology therefore premature.
Theory predicts that species richness or single–species populations can be maintained, at least extinctions minimized, by boosting rates of immigration. One possible way achieving this is establishing corridors suitable habitat between reserves. Using moss patches as model microecosystems, we provide here probably the first field experimental test idea reduce rate loss species, and therefore help to maintain richness. Connecting with did indeed slow extinction preserving for longer periods...
Abstract. 1. Previous accounts of the feeding behaviour hoverflies (Diptera: Syrphidae) are contradictory and in many cases do not correspond with field observations. 2. Patterns on nectar pollen differ between species: these patterns correlated morphological differences. 3. The data indicate that there two correlates increasing tongue length: first, proportion diet decreases; second, flies concentrate visiting flowers longer corollae, which contain more sugar. 4. Reasons for effects discussed.
Preliminary studies indicated that single-dose (500 mg) mebendazole gave disappointing results in the treatment of hookworm infections (Necator americanus) Mali. A placebo-controlled, randomized trial conducted with participation 103 infected subjects (background prevalence > 50%) confirmed (Vermox) did not reduce parasite burdens significantly, as assessed through fecal egg counts. In contrast, a group treated pyrantel (Combantrin) experienced significant reduction worm counts (overall,...
The spatial insurance hypothesis indicates that connectivity is an important attribute of natural ecosystems sustains both biodiversity and ecosystem function. We tested the by measuring impact manipulating in experimental metacommunties a diverse microecosystem. Isolation led to extinction large-bodied apex predators, subsequently followed increases prey species abundance. This trophic cascade was associated with significantly altered carbon nitrogen fluxes fragmented treatments. impacts...
Abstract Aim Accounting for sampling bias is the greatest challenge facing presence‐only and presence‐background species distribution models; no matter what type of model chosen, using biased data will mask true relationship between occurrences environmental predictors. To address this issue, we review four established correction techniques, empirical with known effort, virtual distributions. Innovation Occurrence come from a national recording scheme hoverflies ( Syrphidae ) in Great...
All known Egyptian taxa of the family Syrphidae (flower flies or hover flies) are systematically catalogued. A total number 51 species belonging to 22 genera, 7 tribes and 2 subfamilies has been treated, including eight that listed as unconfirmed records from Egypt. Data for this study have compiled both available literature specimens collected different localities by authors preserved in main insect collections. Old World synonymies, type localities, world distributions biogeographic...
Abstract Pollinators play a crucial role in ecosystems globally, ensuring the seed production of most flowering plants. They are threatened by global changes and knowledge their distribution at national continental levels is needed to implement efficient conservation actions, but this still fragmented and/or difficult access. As step forward, we provide an updated list around 3000 European bee hoverfly species, reflecting current distributional status level (in form present, absent,...
We estimated the phylogeny of Palaearctic Syrphidae using 187 larval morphological characters obtained from about 65% fauna (85 supraspecific taxa represented by 118 species) and based analysis at generic, level. The root syrphid tree was established an outgroup consisting other Aschizan families: Platypezidae, Phoridae Pipunculidae, with rooted on Lonchopteridae. most derived family. Pipunculidae sister group to Syrphidae. Eumerus basal within A trend exists towards increasing complexity...
Helminth parasites were studied in the wood mouse, Apodemus sylvaticus, southern England September of each four successive years (1994-1997). Nine species helminths recorded: five nematodes (Heligmosomoides polygyrus, Syphacia stroma, Pelodera strongyloides, Trichuris muris, Capillaria murissylvatici), two cestodes (Microsomacanthus crenata, Taenia taeniaeformis) and trematodes (Corrigia vitta, Brachylaemus recurvum). In total, 134 mice examined 91.8% carried at least one helminth. The...
Summary Prevalence and abundance of Schistosoma haematobium soil‐transmitted helminths (STH) were assessed among a total 1600 pupils (urine, n = 1190; faecal samples, 1454) attending five schools in Loum, Littoral Province, Cameroon, with the specific aim assessing extent polyparasitism to which infections focused particular subsets study group. S. was 62.8% an (arithmetic mean egg counts) 54 eggs/10 ml urine. For STH these 47.7% 619 eggs per gram faeces (EPG) for Trichuris trichiura , 65.5%...
1. The fitness consequences of feeding on different aphids (apple, blackberry, dock, elder, nettle, pea, rose and sycamore aphids) for two species generalist insect predator (the aphidophagous larvae Episyrphus balteatus Syrphus ribesii- Diptera:Syrphidae) were measured in the laboratory. relevant literature studies prey specialization Syrphidae summarized first time. 2. Both evidence reviewed data from experiment indicated that components overall individual fitnesses are broadly similar...
Abstract. Syrphidae (Diptera) commonly called hoverflies, includes more than 5000 species world‐wide. The aim of this study was to address the systematic position disputed elements in intrafamilial classification Syrphidae, namely monophyly Eristalinae and placement Microdontini Pipizini, as well particular genera ( Nausigaster , Alipumilio Spheginobaccha ). Sequence data from nuclear 28S rRNA mitochondrial COI genes conjunction with larval adult morphological characters fifty‐one syrphid...
This paper considers mouthpart specializations for feeding among dipteran parasitoids, and places them in both an evolutionary ecological context. Parasitoid flies display relation to on solidified honeydew, removing floral nectar from long, narrow, tubular corollas, host materials. No species have as yet been identified which particular pollen-feeding, but we consider it likely that they exist. Marked sexual dimorphism structure appears occur only the Phoridae. Mapping occurrence of...
1 Two published data sets of helminths the wood mouse Apodemus sylvaticus (L.) were analysed to test hypothesis that structure these component communities is influenced by interactions between species. A range tests, with differing null models, was applied tease out importance controlling for subgroupings (e.g. sex, age, site, year, season) within when searching significant associations based on prevalence (co-occurrence, presence/absence) or abundance (quantitative associations) data. 2...