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33 results for “beaches and dunes”
Figure 9 of paper: It's not only the sea: a history of human intervention in the beach-dune ecosystem of Costa da Caparica (Portugal)
<p>This if the figure 9 of paper with DOI 10.5894/rgci-n432.</p> <p>Dunes of Trafaria and Costa da Caparica. This figure was adapted by Dissanayake M. Ruwan Sampath.</p> <p>The original source can be found at Archive from Instituto para a Conservação da Natureza e Florestas (Portugal).</p> <p>Representation of the works made by the Forestry Services between 1884 and 1910. Reference to an area flooded by the ocean in 1905 [sementeira de 1905 inundada pelo mar] and areas where new sowings had to be done [resementeiras]. Notice the drainage systems [valla] and the fences [sébe] near the coastline to protect the plants.</p>
Figure 11 of paper: It's not only the sea: a history of human intervention in the beach-dune ecosystem of Costa da Caparica (Portugal)
<p>This is the figure 11 of the article with DOI 10.5894/rgci-n432.</p> <p>Forests of Trafaria and Costa da Caparica in the 1930s-1940s. This figure was adapted by Dissanayake M. Ruwan Sampath.</p> <p>Original source can be found at the Archive of Instituto para a Conservação da Natureza e Florestas.</p> <p>In green, the existing forests. In pink, the Forestry Services areas given to other institutions or services for public uses. In yellow, the dunes to be afforested.</p> <p> </p>
Data from: A semi-automated approach to classify and map ecological zones across the dune-beach interface
<p>This is the raw data behind the publication: </p> <p><strong>A semi-automated approach to classify and map ecological zones across the dune-beach interface</strong></p> <p><strong>Abstract: </strong>Habitat classification and mapping underpins most conservation and management tools, because habitats are often used as a surrogate for all biodiversity. Some habitat boundaries are easy to delineate; however, sandy shores are ecotones or ecoclines given their dynamic interface between the marine and the terrestrial realms. Although methods for mapping habitats along shorelines have been broadly applied, we aim to test a semi-automated approach to mapping across-shore “sub-environments” in this transition zone at a finer scale. Using an empirical dataset of photographs covering a small area (three across-shore transects from each of two different areas) with a high resolution, we tested seven machine learning algorithms to determine which one had the best classification accuracy, and to identify which environmental variables are the main determinants of classifications. The randomForest, stochastic gradient boosting, and C5.0 algorithms most accurately classified the photographs as the correct sub-environment. Based on the randomForest algorithm, the variables entropy, drift cover rate, local slope, segmented vegetation cover and number of points with sand or marine litter had the highest influence on the classification. There was no sensitivity to spatial variation alongshore. This approach can be used to map sub-environments at larger scales using drone technology to capture georeferenced digital photographs systematically. Consequently, coastal habitats can be mapped at a finer scale without causing disturbance to this especially sensitive ecotone.</p>
Figure 12 of paper: It's not only the sea: a history of human intervention in the beach-dune ecosystem of Costa da Caparica (Portugal)
<p>Figure 12 of research paper with DOI: 10.5894/rgci-n432</p>
Fig. 1 in Beetles (Coleoptera) from seaside beach and dunes in the regions of Świnoujście, Międzyzdroje and Wisełka (Poland) located along the southern coast of the Baltic Sea
Fig. 1. The examined seaside beach and dunes in the regions of Świnoujście, Międzyzdroje and Wisełka.
Airflow dynamics and aeolian sand transport across a beach-climbing dune-clifftop dune system
<p>This study presents an analysis of wind flow and sediment transport from the beach, up a 50m high, long (130m), steep (mean slope 26°) climbing dune and across a 1.5 m high max, 85 m long and 17.5 m wide clifftop dune 30km south of Dakhla in Morocco, NW Africa during highly oblique incident wind conditions. Multiple 2D sonic and cup/vane anemometers and sand traps were utilised for measurements. Flow steering was significant on the upper climbing dune. Flow deceleration occurred near the dune toe, and topographic forcing of flow was considerable on the upper slopes of the climbing dune. Near-surface flow steadiness (CV<sub>U1</sub>, CV<sub>U0.25</sub>) on the climbing dune straight slope segment was low and constant The distance upslope over which the airflow reached the speed comparable to that on the beach increases as the incident wind speed increases. The greatest flow acceleration and speed-up was observed at the cliff edge reaching 250% at 1m height and 220% at 0.25m height for the lowest incident wind speed class (4-5 m/s). The sand transport rate declined from the beach to the climbing dune toe and lower slope, but at the uppermost section of the climbing dune was 4 times higher than at the beach for the 7-8m/s incident wind speed. Sand in aeolian transport was generally finer than surface sand with mean grain size increasing up the slope. A comparison of the sand transport data collected with sand transport models, and the effects of slope on aeolian transport are also examined.</p>
Airflow dynamics and aeolian sand transport across a beach-climbing dune-clifftop dune system
<p>This study presents an analysis of wind flow and sediment transport from the beach, up a 50m high, long (130m), steep (mean slope 26°) climbing dune and across a 1.5 m high max, 85 m long and 17.5 m wide clifftop dune 30km south of Dakhla in Morocco, NW Africa during highly oblique incident wind conditions. Multiple 2D sonic and cup/vane anemometers and sand traps were utilised for measurements. Flow steering was significant on the upper climbing dune. Flow deceleration occurred near the dune toe, and topographic forcing of flow was considerable on the upper slopes of the climbing dune. Near-surface flow steadiness (CV<sub>U1</sub>, CV<sub>U0.25</sub>) on the climbing dune straight slope segment was low and constant The distance upslope over which the airflow reached the speed comparable to that on the beach increases as the incident wind speed increases. The greatest flow acceleration and speed-up was observed at the cliff edge reaching 250% at 1m height and 220% at 0.25m height for the lowest incident wind speed class (4-5 m/s). The sand transport rate declined from the beach to the climbing dune toe and lower slope, but at the uppermost section of the climbing dune was 4 times higher than at the beach for the 7-8m/s incident wind speed. Sand in aeolian transport was generally finer than surface sand with mean grain size increasing up the slope. A comparison of the sand transport data collected with sand transport models, and the effects of slope on aeolian transport are also examined.</p>
Distribution. SE Brazil, restricted to the coastal dunes of Rio Grande do Sul State, from Arroio do Sal (29°33°05" S and 49°52°53" W) S to Chui Beach (33°44'46" S and 53°22' 54" W) and the Rio Chui; possibly also in coastal S Santa Catarina State and N Uruguay. in Ctenomyidae
Distribution. SE Brazil, restricted to the coastal dunes of Rio Grande do Sul State, from Arroio do Sal (29°33°05" S and 49°52°53" W) S to Chui Beach (33°44'46" S and 53°22' 54" W) and the Rio Chui; possibly also in coastal S Santa Catarina State and N Uruguay.
Figures 9 from: Goldstein PZ, Nelson MW (2017) Two psammophilic noctuids newly associated with beach plum, Prunus maritima (Rosaceae): The Dune Noctuid (Sympistis riparia) and Coastal Heathland Cutworm (Abagrotis benjamini) in Northeastern North America (Lepidoptera, Noctuidae). ZooKeys 661: 61-89. https://doi.org/10.3897/zookeys.661.10867
Figures 9 - a–d Larvae of Abagrotis benjamini a–c in situ, Aquinnah, MA, 2016 (P. Goldstein) d Dartmouth, MA, 2012. (M. Nelson).
Figures 5 from: Goldstein PZ, Nelson MW (2017) Two psammophilic noctuids newly associated with beach plum, Prunus maritima (Rosaceae): The Dune Noctuid (Sympistis riparia) and Coastal Heathland Cutworm (Abagrotis benjamini) in Northeastern North America (Lepidoptera, Noctuidae). ZooKeys 661: 61-89. https://doi.org/10.3897/zookeys.661.10867
Figures 5 - Examples of habitats represented at the Lobsterville Dunes. a Immediate backdune, dominated by beach plum, also in foreground b Floristic diversity on a secondary dune, the vegetation including beach heather (Hudsonia tomentosa) and heavy lichenization c A section of dune supporting a mixture of salt- and wind-dwarfed oak, including scrub oak (Quercus ilicifolia) in the foreground.
Figure 4 from: Goldstein PZ, Nelson MW (2017) Two psammophilic noctuids newly associated with beach plum, Prunus maritima (Rosaceae): The Dune Noctuid (Sympistis riparia) and Coastal Heathland Cutworm (Abagrotis benjamini) in Northeastern North America (Lepidoptera, Noctuidae). ZooKeys 661: 61-89. https://doi.org/10.3897/zookeys.661.10867
Figure 4 - a Distribution of Abagrotis benjamini adults recorded from Massachusetts as of 2016 (MNHESP), b Distribution of Abagrotis benjamini adults recorded from Martha's Vineyard as of 2016 (MNHESP).
Figure 3 from: Goldstein PZ, Nelson MW (2017) Two psammophilic noctuids newly associated with beach plum, Prunus maritima (Rosaceae): The Dune Noctuid (Sympistis riparia) and Coastal Heathland Cutworm (Abagrotis benjamini) in Northeastern North America (Lepidoptera, Noctuidae). ZooKeys 661: 61-89. https://doi.org/10.3897/zookeys.661.10867
Figure 3 - a Distribution of Sympistis riparia adults recorded from Massachusetts as of 2016 (MNHESP), b Distribution of Sympistis riparia adults recorded from Martha's Vineyard as of 2016 (MNHESP).
Figures 8 from: Goldstein PZ, Nelson MW (2017) Two psammophilic noctuids newly associated with beach plum, Prunus maritima (Rosaceae): The Dune Noctuid (Sympistis riparia) and Coastal Heathland Cutworm (Abagrotis benjamini) in Northeastern North America (Lepidoptera, Noctuidae). ZooKeys 661: 61-89. https://doi.org/10.3897/zookeys.661.10867
Figures 8 - a–d Larvae of Sympistis riparia photographed in situ, Aquinnah, MA, 2016 (P. Goldstein).
Figure 24 from: Goldstein PZ, Nelson MW (2017) Two psammophilic noctuids newly associated with beach plum, Prunus maritima (Rosaceae): The Dune Noctuid (Sympistis riparia) and Coastal Heathland Cutworm (Abagrotis benjamini) in Northeastern North America (Lepidoptera, Noctuidae). ZooKeys 661: 61-89. https://doi.org/10.3897/zookeys.661.10867
Figure 24 - Female genitalia, Abagrotis nefascia USNM dissection #148066. Note presence of two signa, one reduced.
Figure 22 from: Goldstein PZ, Nelson MW (2017) Two psammophilic noctuids newly associated with beach plum, Prunus maritima (Rosaceae): The Dune Noctuid (Sympistis riparia) and Coastal Heathland Cutworm (Abagrotis benjamini) in Northeastern North America (Lepidoptera, Noctuidae). ZooKeys 661: 61-89. https://doi.org/10.3897/zookeys.661.10867
Figure 22 - Genitalia of Abagrotis crumbi benjamini (Paratype). USNM dissection #36838. a Clasper b Phallus.
Figure 23 from: Goldstein PZ, Nelson MW (2017) Two psammophilic noctuids newly associated with beach plum, Prunus maritima (Rosaceae): The Dune Noctuid (Sympistis riparia) and Coastal Heathland Cutworm (Abagrotis benjamini) in Northeastern North America (Lepidoptera, Noctuidae). ZooKeys 661: 61-89. https://doi.org/10.3897/zookeys.661.10867
Figure 23 - Everted vesica of Abagrotis benjamini, Aquinnah, MA. a USNM dissection #148029 b Everted vesica of Abagrotis benjamini, Dartmouth, MA. USNM dissection #148067. Cf. Figs 9d (larva), 11(adult), and 18a, b (adult).
Figure 20 from: Goldstein PZ, Nelson MW (2017) Two psammophilic noctuids newly associated with beach plum, Prunus maritima (Rosaceae): The Dune Noctuid (Sympistis riparia) and Coastal Heathland Cutworm (Abagrotis benjamini) in Northeastern North America (Lepidoptera, Noctuidae). ZooKeys 661: 61-89. https://doi.org/10.3897/zookeys.661.10867
Figure 20 - Everted vesica of Abagrotis nefascia, Yakima, WA. USNM dissection #s 148023, 148024. Scale bar: 1 mm.
Figure 2 from: Goldstein PZ, Nelson MW (2017) Two psammophilic noctuids newly associated with beach plum, Prunus maritima (Rosaceae): The Dune Noctuid (Sympistis riparia) and Coastal Heathland Cutworm (Abagrotis benjamini) in Northeastern North America (Lepidoptera, Noctuidae). ZooKeys 661: 61-89. https://doi.org/10.3897/zookeys.661.10867
Figure 2 - Martha's Vineyard and neighboring islands comprising Dukes County with indication of town boundary lines and relevant geologic formations and substrates overlain. Moshup Trail and Lobsterville Dunes sites marked with a ★.
Figure 18 from: Goldstein PZ, Nelson MW (2017) Two psammophilic noctuids newly associated with beach plum, Prunus maritima (Rosaceae): The Dune Noctuid (Sympistis riparia) and Coastal Heathland Cutworm (Abagrotis benjamini) in Northeastern North America (Lepidoptera, Noctuidae). ZooKeys 661: 61-89. https://doi.org/10.3897/zookeys.661.10867
Figure 18 - Abagrotis benjamini Franclemont, Dartmouth, MA. M.W. Nelson. a Dorsal b Ventral. Scale bars: 1 cm (Photos B. Proshek).
Figure 21 from: Goldstein PZ, Nelson MW (2017) Two psammophilic noctuids newly associated with beach plum, Prunus maritima (Rosaceae): The Dune Noctuid (Sympistis riparia) and Coastal Heathland Cutworm (Abagrotis benjamini) in Northeastern North America (Lepidoptera, Noctuidae). ZooKeys 661: 61-89. https://doi.org/10.3897/zookeys.661.10867
Figure 21 - Genitalia of Abagrotis crumbi (=nefascia). a Holotype, ♂. USNM dissection #36819 b Paratype, ♂. USNM dissection #36821. Scale bars: 1 mm.
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