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45 results for “Soft sediments”
FIGURE 17 in Tanaidaceans (Crustacea: Malacostraca: Peracarida) from soft-sediment habitats off Israel, Eastern Mediterranean
FIGURE 17. Pseudotanais (P.) stiletto sp. nov., male, A, allotype, dorsal; B, antennule; C, left cheliped; D, pereopod 1; E, pereopod 2; F, pereopod 4; G, pleopod; H, uropod; I, pereopod 6. Scale line = 0.2 mm for A; 0.1 mm for B to I.
FIGURE 12 in Tanaidaceans (Crustacea: Malacostraca: Peracarida) from soft-sediment habitats off Israel, Eastern Mediterranean
FIGURE 12. Leptochelia tanykeraia sp. nov., female, A, holotype, dorsal; B, antennule; C, antenna; D, labrum; E, left mandible; F, right mandible; G, labium; H, maxillule; I, maxilliped; J, pleopod. Scale line = 0.4 mm for A; 0.1 mm for B to J.
FIGURE 5 in Tanaidaceans (Crustacea: Malacostraca: Peracarida) from soft-sediment habitats off Israel, Eastern Mediterranean
FIGURE 5. Typhlotanais angstromensis sp. nov., female, A, holotype, dorsal; B, holotype, lateral; C, antennule; D, antenna; E, labrum; F, left mandible; G, maxillule; H, labium; I, maxilliped. Scale line = 0.4 mm for A, B; 0.1 mm for C to I.
FIGURE 11 in Tanaidaceans (Crustacea: Malacostraca: Peracarida) from soft-sediment habitats off Israel, Eastern Mediterranean
FIGURE 11. Tanaissus microthymus sp. nov., allotype male: A–F, pereopods 1–6 respectively; G, pleopod, only one plumose seta figured; H, uropod. Scale line = 0.25 mm.
FIGURE 15 in Tanaidaceans (Crustacea: Malacostraca: Peracarida) from soft-sediment habitats off Israel, Eastern Mediterranean
FIGURE 15. Pseudotanais (P.) stiletto sp. nov., A, holotype female, dorsal; B, antennule; C, antenna; D, labrum; E, left mandible; F, right mandible; G, maxillule and maxilla; H, maxilliped endite; I, maxilliped; J, epignath; K, uropod. Scale line = 0.3 mm for A; 0.1 mm for B to K.
FIGURE 9 in Tanaidaceans (Crustacea: Malacostraca: Peracarida) from soft-sediment habitats off Israel, Eastern Mediterranean
FIGURE 9. Tanaissus microthymus sp. nov., allotype male: A, habitus, right side, only one set of pereopods drawn for clarity; B, maxilliped palp, lateral; paratype male, anterior fragment: C, habitus, dorsal, from cephalon to pereonite 5. Scale line = 1 mm A, C; 0.31 mm B.
FIGURE 14 in Tanaidaceans (Crustacea: Malacostraca: Peracarida) from soft-sediment habitats off Israel, Eastern Mediterranean
FIGURE 14. Leptochelia tanykeraia sp. nov., male allotype, A, entire, dorsal; B, antennule; C, antenna; D, cheliped, E, pereopod 1; F, pereopod 6. Scale line = 1 mm for A; 0.25 mm for to F.
Figure 1 in The marine soft-sediment benthic communities of Hong Kong: a comparison of submarine cave and open habitats
Figure 1. Particle-size histograms by proportionate weight of the sediments from eight of the sampling sites, grouped into 1Φ divisions (silt-clay fractions amalgamated).
Figure 2. A in The marine soft-sediment benthic communities of Hong Kong: a comparison of submarine cave and open habitats
Figure 2. A, dendrogram of Bray-Curtis similarity (%) based on square-root-transformed data for the benthic community from each sampling site; B, MDS ordination of the data shown in Figure 2A, with definition of clusters at 20, 30 and 40% from that figure.
Enhancing ecological integrity while preserving ecosystem services: constructing soft-sediment islands in a shallow lake
<p>1. Ecosystems are increasingly managed to provide multiple benefits to humans, which often degrades their ecological integrity. This strongly applies to aquatic ecosystems, in which engineering can enhance flood protection, drinking water supply, fisheries and recreation. Although these activities typically increase ecosystem functionality to humans, they often impair key aspects of biodiversity and natural functioning.</p> <p>2. Classical restoration of such degrading freshwater ecosystems can lead to societal opposition, if returning to a former ecosystem state affects previously acquired ecosystem services. Innovative nature-based solutions are therefore needed that enhance natural values in ecosystems, without affecting existing services.</p> <p>3. We present a large-scale project aiming to increase the ecological integrity of a human-modified freshwater lake, while maintaining its services to humans. The freshwater lake Markermeer in the Netherlands was formed by closing off an estuary for flood protection. The ecological integrity of this lake diminished over time, likely because a declining primary productivity impaired biodiversity at higher trophic levels. This decline is associated with a lack of gradual land-water transitions, strong resuspension of fine sediments, a low nutrient availability and lack of dynamics typically to be expected in a natural temperate freshwater lake. Restoring the lake to its former marine state would conflict with current ecosystem services.</p> <p>4. A nature-based solution was initiated in 2016, consisting of constructing a five-island archipelago from the lake's own soft-sediments called the "Marker Wadden". The project aims to increase the lake's primary production by creating gradual land-water transitions, more heterogeneity in water depths, and decreasing turbidity by creating shelter and deep sinks reducing fine-sediment resuspension by wind – thus introducing currently missing elements that are typical for natural lakes. We present the underlying ecological framework and first scientific results of this innovative on-going project.</p> <p>5. Within four years, the Marker Wadden project shows how forward-looking sustainable development of lake ecosystems using a rewilding approach can enhance natural processes and attract birds and fish, without conflicting with existing ecosystem services. This inspires new directions for halting and reversing the degradation of other vital ecosystems worldwide.</p>
Enhancing ecological integrity while preserving ecosystem services: constructing soft-sediment islands in a shallow lake
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Data from: Influence of sediment characteristics on the composition of soft-sediment intertidal communities in the northern Gulf of Mexico
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Figure 5 from: Mehrotra R, Caballer Gutierrez M, Scott CM, Arnold S, Monchanin C, Chavanich S (2020) On the Plakobranchidae (Gastropoda, Sacoglossa) from soft sediment habitats of Koh Tao, Gulf of Thailand, with descriptions of two new species. ZooKeys 969: 85-121. https://doi.org/10.3897/zookeys.969.52941
Figure 5 Living specimens of Plakobranchus papua from Koh Tao A close-up of head, 28 mm specimen B dorsal view, 30 mm (photograph by Pau Urgell Plaza) C dorsolateral view of sequenced specimen, 27 mm.
Figure 2 from: Mehrotra R, Caballer Gutierrez M, Scott CM, Arnold S, Monchanin C, Chavanich S (2020) On the Plakobranchidae (Gastropoda, Sacoglossa) from soft sediment habitats of Koh Tao, Gulf of Thailand, with descriptions of two new species. ZooKeys 969: 85-121. https://doi.org/10.3897/zookeys.969.52941
Figure 2 Phylogenetic hypothesis for the Elysia japonica complex based on COI sequences. Sequences obtained in this study in bold. Bootstrap values from ML shown above branches and PP values from BI below branches. Tree rooted to Costasiella coronata (not shown).
Figure 1 from: Mehrotra R, Caballer Gutierrez M, Scott CM, Arnold S, Monchanin C, Chavanich S (2020) On the Plakobranchidae (Gastropoda, Sacoglossa) from soft sediment habitats of Koh Tao, Gulf of Thailand, with descriptions of two new species. ZooKeys 969: 85-121. https://doi.org/10.3897/zookeys.969.52941
Figure 1 Phylogenetic hypothesis of Plakobranchus based on COI sequences. Bootstrap values from ML shown above branch and posterior probability (PP) values below branch. Sequences obtained in this study in bold. Missing PP values, or those that support branch placements that deviate from the ML tree are denoted with an asterisk * and are due to the discrepancy between ML and BI topologies (see Suppl. material 1). Tree rooted to Costasiella coronata (not shown).
Figure 8 from: Mehrotra R, Caballer Gutierrez M, Scott CM, Arnold S, Monchanin C, Chavanich S (2020) On the Plakobranchidae (Gastropoda, Sacoglossa) from soft sediment habitats of Koh Tao, Gulf of Thailand, with descriptions of two new species. ZooKeys 969: 85-121. https://doi.org/10.3897/zookeys.969.52941
Figure 8 Illustrations and images of specimens belong to the Elysia japonica complex A–E illustrations taken from the original descriptions of species belonging to the Elysia japonica complex A, DElysia abei Baba, 1955 BElysia amakusana Baba, 1955 CElysia furvacauda Burn, 1958 E illustration of radula of Elysia japonica Eliot, 1913 by Baba (1949)F–JElysia aowthai sp. nov. showing variation in colouration, 12 mm (F), 9 mm (G), 11 mm (H, I), 8 mm (J).
Figure 4 from: Mehrotra R, Caballer Gutierrez M, Scott CM, Arnold S, Monchanin C, Chavanich S (2020) On the Plakobranchidae (Gastropoda, Sacoglossa) from soft sediment habitats of Koh Tao, Gulf of Thailand, with descriptions of two new species. ZooKeys 969: 85-121. https://doi.org/10.3897/zookeys.969.52941
Figure 4 Living specimens of Plakobranchus ocellatus from Koh Tao. A, B close-up of head with retracted rhinophores and dorsolateral view, 25 mm C sequenced specimen, 32 mm.
Figure 11 from: Mehrotra R, Caballer Gutierrez M, Scott CM, Arnold S, Monchanin C, Chavanich S (2020) On the Plakobranchidae (Gastropoda, Sacoglossa) from soft sediment habitats of Koh Tao, Gulf of Thailand, with descriptions of two new species. ZooKeys 969: 85-121. https://doi.org/10.3897/zookeys.969.52941
Figure 11 Genitalia and reproductive system of Elysia aowthai sp. nov., Koh Tao, Thailand, 15 mm alive. Abbreviations: ag – to the albumen gland; bc – bursa copulatrix; f – to the follicles; mg – mucus gland; p – penis; pr – to the prostate; v – vagina; vd – vas deferens; vo – vaginal opening.
Figure 3 from: Mehrotra R, Caballer Gutierrez M, Scott CM, Arnold S, Monchanin C, Chavanich S (2020) On the Plakobranchidae (Gastropoda, Sacoglossa) from soft sediment habitats of Koh Tao, Gulf of Thailand, with descriptions of two new species. ZooKeys 969: 85-121. https://doi.org/10.3897/zookeys.969.52941
Figure 3 Phylogenetic hypotheses of Plakobranchidae based on concatenated sequences of COI, 16S, and H3 regions. Sequences obtained in this study in bold. Bootstrap values from ML topology (left) aligned with PP values from BI topology (right).
Figure 10 from: Mehrotra R, Caballer Gutierrez M, Scott CM, Arnold S, Monchanin C, Chavanich S (2020) On the Plakobranchidae (Gastropoda, Sacoglossa) from soft sediment habitats of Koh Tao, Gulf of Thailand, with descriptions of two new species. ZooKeys 969: 85-121. https://doi.org/10.3897/zookeys.969.52941
Figure 10 SEM images of radulae of Elysia aowthai sp. nov. and Plakobranchus noctisstellatus sp. nov. A–CElysia aowthai sp. nov., Koh Tao, Thailand, 15 mm alive A general view of the radula without the ascus B active teeth from the radula with smooth cutting edge C sixth teeth of the descending series with denticulated cutting edge D–FPlakobranchus noctisstellatus sp. nov. Koh Tao, Thailand, 21 mm alive D general view of the radula without the ascus E lateral view of the descending series F detail of the cutting edge of a tooth.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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