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16 results for “Pan trap”
Figure. Location of the study area in the Czech Republic near Nové Losiny village (marked by star), delimitation of the studied meadows and placement of pan-traps transects within them. in Comparison of two methods for sampling orthopterans in grassland: differences in species representation and sex ratios
Figure. Location of the study area in the Czech Republic near Nové Losiny village (marked by star), delimitation of the studied meadows and placement of pan-traps transects within them.
Figs 2, 3 in Native bee fauna of tomato crops: a comparison of active sampling and pan trapping methods
Figs 2, 3. Richness (Fig. 2) and abundance (Fig. 3) of flower visiting bees sampled bY different pan trap colors in nine tomato crops in GoiÁs state, BraZil. Boxplots represent means while vertical lines represent the 95% confidence interval. Each point represents value for each sampling unit.
Linked collectors and determiners for: Surveys of the bee (Hymenoptera: Apiformes) community in northern hardwood forest and wildlife clearings using pan traps.
Natural history specimen data linked to collectors and determiners held within, "Surveys of the bee (Hymenoptera: Apiformes) community in northern hardwood forest and wildlife clearings using pan traps". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/d6a5709f-1de0-4963-b9f9-a882026a968c">https://bionomia.net/dataset/d6a5709f-1de0-4963-b9f9-a882026a968c</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/d6a5709f-1de0-4963-b9f9-a882026a968c">https://gbif.org/dataset/d6a5709f-1de0-4963-b9f9-a882026a968c</a>. Formatted as a Frictionless Data package.
Figure S2 in Surveys of the bee (Hymenoptera: Apiformes) community in a Neotropical savanna using pan traps
Figure S2. Habitat view of the point of each trail (trails in lines) used to collect bees using pan traps at Rio Preto State Park, Minas Gerais, Brazil. Pictures were taken in March 2014.
Figure 2 in Surveys of the bee (Hymenoptera: Apiformes) community in a Neotropical savanna using pan traps
Figure 2. Species richness (A) and abundance (B) of bees collected by pan traps in each trail (1-5) during five consecutive days in October 2013 and March 2014 at Rio Preto State Park, Minas Gerais, Brazil.
Figure 1 in Surveys of the bee (Hymenoptera: Apiformes) community in a Neotropical savanna using pan traps
Figure 1.Species accumulation curves (mean + SD) and richness estimator Chao 1 values for the bees captured by pan traps in the Rio Preto State Park, Minas Gerais, Brazil,during five consecutive days of samplings in October 2013 and March 2014.
Figure S3 in Surveys of the bee (Hymenoptera: Apiformes) community in a Neotropical savanna using pan traps
Figure S3. Landscape aerial images of the five trails and the five points at each trail used to collect bees using pan traps at Rio Preto State Park, Minas Gerais, Brazil. Satellite images from Google Earth. Scale bar = 100 meters.
Figure S1 in Surveys of the bee (Hymenoptera: Apiformes) community in a Neotropical savanna using pan traps
Figure S1. Map of the study site in the Rio Preto State Park, Minas Gerais, Brazil, and the schematic drawing illustrating the trail design (one of the 5 trails) and the position of the three colored traps (white, yellow and blue) in the trail.
Figure 3 in Surveys of the bee (Hymenoptera: Apiformes) community in a Neotropical savanna using pan traps
Figure 3. Bee abundance in relation to the habitat complexity (A) and to each habitat score (varying 0 to 3): tree canopy cover (B), shrub canopy cover (C), ground herb cover (D), amount of logs, rocks and debris (E), and soil moisture (F).
Pan trap and plant-flower visitor observation data for: Multi-species crop mixtures increase insect biodiversity in an intercropping experiment
<ol> <li><span>Recent biodiversity declines require action across sectors such as agriculture. The situation is particularly acute for arthropods, a species-rich taxon providing important ecosystem services. To counteract negative consequences of agricultural intensification, creating a less hostile agricultural "matrix" through growing crop mixtures can reduce harm for arthropods without yield losses. </span></li> <li><span>While grassland biodiversity experiments showed positive plant biodiversity effects on arthropods, experiments manipulating crop diversity and agrochemical input use to study arthropods are lacking. </span></li> <li><span>Here, we experimentally manipulated crop diversity (1–3 species, fallows), crop species (wheat, faba bean, linseed, oilseed rape) and agrochemical input (high vs. low) and studied responses of arthropod biodiversity. We tested if arthropod responses were affected by crop diversity, mixtures and management. Additionally, we measured crop biomass.</span></li> <li><span>Crop biomass increased with crop diversity under high-input mangement, while under low management intensity, biomass was highest in two-species mixtures.</span></li> <li><span>Increasing crop diversity positively affected arthropod abundance and diversity, both under low- and high-input management. Crop mixtures containing faba bean, linseed or oilseed rape had particularly high arthropod diversity.</span></li> <li><span>Mass-flowering crops attracted more arthropods than legumes or cereals. Integrating intercropping into agricultural systems could increase flower visits by insects up to 15 million per hectare, thus likely also supporting pollination and pest-control ecosystem services.</span></li> <li><span>Flower-visitor network complexity increased in mixtures containing linseed and faba bean, and under low-input management.</span></li> <li><span>Intercropping can counteract insect declines in farmland by creating beneficial matrix habitat without compromising crop yield.</span></li> </ol>
Pan trap and plant-flower visitor observation data for: Multi-species crop mixtures increase insect biodiversity in an intercropping experiment
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Hymenoptera Species and Counts in a Maryland Forest Clearing Using Multiple Colored Pan Traps
These data present the results of pan trapping for Hymenoptera in the Mid-Atlantic in a forest clearing using multiple pan colors.Pan traps consisted of seven color treatments: blue, fluorescent blue, yellow, fluorescent yellow, red, white, and clear (control) bowls. The species were identified, and the number of each species found in each bowl color in each transect is presented.
Colour pan-traps often catch less when there are more flowers around
<p>When assessing changes in populations of species it is essential that the methods used to collect data have some level of precision and preferably also good accuracy. One commonly used method to collect pollinators is colour pan-traps, but this method has been suggested to be biased by the abundance of surrounding flowers. The present study evaluated the relationship between pan-trap catches and the frequency of flowers on small (25 m2) and large (2-6 ha) spatial scales. If pan-traps work well, one should assume a positive relationship, i.e. more insects caught when they have more food. However, in contrast, we found that catches in pan-traps were often negatively affected by flower frequency. Among the six taxa evaluated, the negative bias was largest in Vespoidea and Lepturinae, while there was no bias in solitary Apoidea (Cetoniidae, Syrphidae and social Apoidea were intermediate). Furthermore, red flowers seemed to contribute most to the negative bias. There was also a tendency that the negative bias differed within the flight season and that is was higher when considering the large spatial scale compared to the small one. To conclude, pan-trap catches may suffer from a negative bias due to surrounding flower frequency and colour. The occurrence and magnitude of the negative bias was context and taxon dependent, and therefore difficult to adjust for. Thus, pan-traps seems less suited to evaluate differences between sites and the effect of restoration, when gradients in flower density is large. Instead, it seems better suited to monitor population changes within sites, and when gradients are small.</p>
Comparison of hand netting and pan trapping methods for estimating hover fly (Diptera: Syrphidae) diversity in the tropical agroecosystems of East Africa
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Colour pan-traps often catch less when there are more flowers around
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Figure 1 from: Gonzalez VH, Park KE, Çakmak I, Hranitz JM, Barthell JF (2016) Pan traps and bee body size in unmanaged urban habitats. Journal of Hymenoptera Research 51: 241-247. https://doi.org/10.3897/jhr.51.9353
Figure 1 - One of the unmanaged areas at Uludağ University in Bursa, Turkey, surveyed using pan traps placed on the ground and at 70 cm above ground (left); boxplots (right) showing the intertegular distance of all bees and Lasioglossum malachurum collected at each height.
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