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18 results for “Habitat Usage”
Fig. 2 in Larval Development And Habitat Usage Of Stream-Breeding Fire Salamanders In An Urban Environment
Fig. 2. Changes in the number of salamander larvae and rainfall. The bold black continuous line shows the mean number of salamander larvae detected during the surveys in the three 10 day intervals of months in Hűvös-ér stream, 2011–2014. The bar graph shows the mean amount (and SD) of precipitation (mm) during the three 10-day intervals of months
Fig. 3 in Larval Development And Habitat Usage Of Stream-Breeding Fire Salamanders In An Urban Environment
Fig. 3. Mean density of salamander larvae (number of larvae/m2) detected in the 16 segments during surveys every 10 days in "Hűvös-ér" stream, 2011–2014 (2011: thin line, 2012:
Fig. 5 in Larval Development And Habitat Usage Of Stream-Breeding Fire Salamanders In An Urban Environment
Fig. 5. Mean number of salamander larvae detected per a year in the "releasing" 2–6 upper segments (continuous bold line), in the "strong collector" middle segments: 7–9 (dashed line) and the "weak collector" lower segments: 10–13 (dotted line) during surveys every 10 days in "Hűvös-ér" stream between 2011–2014. Data from segment 1 have not been plotted because larvae were present at only one time point
Fig. 1 in Larval Development And Habitat Usage Of Stream-Breeding Fire Salamanders In An Urban Environment
Fig. 1. Segments of "Hűvös-ér" stream, where Salamandra salamandra larvae were surveyed. (Numbers indicate individual stream segments, bold meandering line = main branch of the stream, thin branch- ing line = tributaries of the stream, straight lines = segment boundaries, four-pointed stars at segment boundaries and in the stream bed = water steps, double line = main road between Budapest and Solymár, P = "Paprikás"-stream)
Spatial Distribution and Habitat Usage of <i>Coryphopterus personatus</i> and <i>C. hyalinus</i> in Turneffe Atoll, Belize
<p>Data used to develop 3D models of coral reefs using structure-from-motion photogrammetry. The data used to generate photogrammetry models are pictures of the reef from ~1 m above the substratum and coordinates of ground control points for each of twelve distinct ~20 m x 10 m reef areas. The photogrammetry workflow to create the digital models included photo alignment, followed by geometry building, and lastly texture building using Agisoft Pro. Additionally included are the orthomosaics and digital elevation models derived from the 3D models and training data used to build a classification algorithm to classify reef vs sand benthic types using the site orthomosaics. Finally, the location and sizes of mixed shoals of <em>Coryphopterus personatus</em> and <em>Coryphopterus hyalinus</em> are included. All data were collected from Turneffe Atoll (17.3638° N, 87.8581° W), Belize in January 2017. These data are used in conjunction to develop a habitat usage model to understand what features of coral reefs are correlated with the distribution of <em>C. personatus</em>/<em>hyalinus. </em>All code associated with the analysis can be found here: <a href="https://github.com/jdselwyn/Habitat_Usage">https://github.com/jdselwyn/Habitat_Usage</a>.</p>
Dataset: Spatiotemporal patterns of salmon winter habitat usage in the Northeast Pacific uncovered by environmental DNA
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Data from: Habitat usage of Daubenton's bat (Myotis daubentonii), common pipistrelle (Pipistrellus pipistrellus), and soprano pipistrelle (Pipistrellus pygmaeus) in a North Wales upland river catchment
Distributions of Daubenton's bat (Myotis daubentonii), common pipistrelle, (Pipistrellus pipistrellus), and soprano pipistrelle (Pipistrellus pygmaeus) were investigated along and altitudinal gradient of the Lledr River, Conwy, North Wales, and presence assessed in relation to the water surface condition, presence/absence of bank‐side trees, and elevation. Ultrasound recordings of bats made on timed transects in summer 1999 were used to quantify habitat usage. All species significantly preferred smooth water sections of the river with trees on either one or both banks; P. pygmaeus also preferred smooth water with no trees. Bats avoided rough and cluttered water areas, as rapids may generate high‐frequency echolocation‐interfering noise and cluttered areas present obstacles to flight. In lower river regions, detections of bats reflected the proportion of suitable habitat available. At higher elevations, sufficient habitat was available; however, bats were likely restricted due to other factors such as a less predictable food source. This study emphasizes the importance of riparian habitat, bank‐side trees, and smooth water as foraging habitat for bats in marginal upland areas until a certain elevation, beyond which bats in these areas likely cease to forage. These small‐scale altitudinal differences in habitat selection should be factored in when designing future bat distribution studies and taken into consideration by conservation planners when reviewing habitat requirements of these species in Welsh river valleys, and elsewhere within the United Kingdom.
FIG. 1 in Habitat Usage, Dietary Niche Overlap, and Potential Partitioning between the Endangered Spotted Turtle (Clemmys guttata) and Other Turtle Species
FIG. 1. The path analysis shows the relationship between habitat parameters associated with PC1 (which was strongly positively loaded with salinity, depth, dissolved O2, canopy cover, and pH) and three turtle species: Chrysemys picta, Kinosternon subrubrum, and Clemmys guttata on the Atlantic Coastal Plain. The solid and dashed lines represent direct and indirect effects, respectively, and black lines indicate positive effects while gray lines indicate negative effects. The numbers associated with each line represent the direction and magnitude of each effect, with the strength of the interaction increasing as the values approach 1.
FIG. 2 in Habitat Usage, Dietary Niche Overlap, and Potential Partitioning between the Endangered Spotted Turtle (Clemmys guttata) and Other Turtle Species
FIG. 2. Biplots of d15N and d13C for four turtle species at all sites with ellipses around each species (filled squares/solid black line ¼ Kinosternon subrubrum, filled triangles/solid gray line ¼ Chrysemys picta, open circles/gray dashed line¼ Chelydra serpentina, filled diamonds/ lack dashed line ¼ Clemmys guttata). There is a large overlap in isotopic compositions for all species, resulting in no significant differences in isotopic niche space between species (see text).
FIG. 3 in Habitat Usage, Dietary Niche Overlap, and Potential Partitioning between the Endangered Spotted Turtle (Clemmys guttata) and Other Turtle Species
FIG. 3. Bivariate SIBER (Stable Isotope Bayesian Ellipses in R) plots of ellipses estimating isotopic niche based on the d13C and d15N compositions with all species, excluding C. serpentina. The black circles represent the mode, while the three ellipses from the center outwards show where 50%, 75%, and 95% of the data lie, respectively. The numbers indicate the site numbers, while the letter codes indicate species names (MUDT ¼ Kinosternon subrubrum, PATU ¼ Chrysemys picta, SPTU ¼ Clemmys guttata). Together, these bivariate data of the isotopic compositions create ellipses which represent the relative sizes of the isotopic niche of each turtle species at all of our sites on the Atlantic Coastal Plain. Despite the lack of any significant differences in isotopic niche, these ellipses allow us to see some degree of niche overlap among C. guttata at all sites.
Data from: Habitat usage of Daubenton's bat (Myotis daubentonii), common pipistrelle (Pipistrellus pipistrellus), and soprano pipistrelle (Pipistrellus pygmaeus) in a North Wales upland river catchment
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Figure 2 from: Rosa G, Penado A (2013) Rana iberica (Boulenger, 1879) goes underground: subterranean habitat usage and new insights on natural history. Subterranean Biology 11: 15-29. https://doi.org/10.3897/subtbiol.11.5170
Figure 2 - Polar coordinates representing the activity cycle and breeding period of Rana iberica in two different sites (inside the drainage gallery in Sazes and the whole area of Planalto Superior) in Serra da Estrela; Portugal. Dark brown areas: post-metamorphic phase; beige areas: larval phase; green areas: adults in breeding activity.
Figure 1 from: Rosa G, Penado A (2013) Rana iberica (Boulenger, 1879) goes underground: subterranean habitat usage and new insights on natural history. Subterranean Biology 11: 15-29. https://doi.org/10.3897/subtbiol.11.5170
Figure 1 - Serra da Estrela Natural Park and hypogean habitat used by individuals of Rana iberica: A entrance of the underground spring B Schistostega pennata covering walls and floor of the drainage gallery C horizontal tunnel of drainage gallery. Photo A by Madeira M, B by Rosa GM, C by Laurentino T.
Figure 5 from: Rosa G, Penado A (2013) Rana iberica (Boulenger, 1879) goes underground: subterranean habitat usage and new insights on natural history. Subterranean Biology 11: 15-29. https://doi.org/10.3897/subtbiol.11.5170
Figure 5 - Rana iberica tadpoles feeding on lost clutch: A fresh egg mass of Rana iberica laid (mostly) above water surface (11 March, 2012) B group of tadpoles feeding on the dead eggs (29 April, 2012) C, D and E close ups of tadpole feasting on the eggs. Photos by Rosa GM.
Figure 6 from: Rosa G, Penado A (2013) Rana iberica (Boulenger, 1879) goes underground: subterranean habitat usage and new insights on natural history. Subterranean Biology 11: 15-29. https://doi.org/10.3897/subtbiol.11.5170
Figure 6 - Salamandra salamandra gallaica larvae predation upon Rana iberica tadpole on the 29 April (2012): A individual of salamander approaching tadpole instants before seizing it B salamander larval ingesting tadpole. Photos by Rosa GM.
Figure 4 from: Rosa G, Penado A (2013) Rana iberica (Boulenger, 1879) goes underground: subterranean habitat usage and new insights on natural history. Subterranean Biology 11: 15-29. https://doi.org/10.3897/subtbiol.11.5170
Figure 4 - Egg and early life stages of Rana iberica inhabiting a drainage gallery in Serra da Estrela, Portugal: A egg mass stuck to underwater rock (28 January, 2012) B eggs' detail with new born tadpoles (one day old) C tadpole with dark pigmented colouration (Gosner stage 25; 11 March, 2012) D recently post-metamorphic individual (31 May, 2012). Photos by Rosa GM.
Figure 3 from: Rosa G, Penado A (2013) Rana iberica (Boulenger, 1879) goes underground: subterranean habitat usage and new insights on natural history. Subterranean Biology 11: 15-29. https://doi.org/10.3897/subtbiol.11.5170
Figure 3 - Adult individuals of Rana iberica found inhabiting a drainage gallery in Serra da Estrela, Portugal: A male with typical lichen-shaped pattern on the back B female hidden in a crevice of the gallery C male climbing up the wall D couple in axillary amplexus in water E axillary amplexus out of the water. Photos by Rosa GM.
Fig. 4 in Larval Development And Habitat Usage Of Stream-Breeding Fire Salamanders In An Urban Environment
Fig. 4. Principal components analysis of stream substrate composition at 16 stream segments, "Hűvös-ér" stream. PC1 described a gradient from stream segments with a high % cover of fine gravel to segments with a high % cover of concrete. PC2 described a gradient from segments with a high % cover of sand to segments with a high cover of stones
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