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1,283 results for “Intertidal”
Figure 34 in Rocky-intertidal cheilostome bryozoans from the vicinity of the Sesoko Biological Station, west-central Okinawa, Japan
Figure 34. Rhynchozoon ferocula Hayward: (a) NSMT-Te 1178, view of smaller colony on SEM stub; (b) NSMT-Te 1179, marginal autozooids; (c–e) NSMT-Te 1178 (larger colony on SEM stub), (c) orifices in (c) mature autozooids, (d) orifice and oral spines, (e) ovicelled autozooids (arrowhead, window in calcified ectooecium; arrow, labellum); (f) NSMT-Te 1180, ancestrula and two daughter zooids. All panels are scanning electron microscopic images of bleached specimens. Scale bars: a = 1.0 mm; b, e, f = 200 µm; c = 100 µm; d = 50 µm.
Figure 32 in Rocky-intertidal cheilostome bryozoans from the vicinity of the Sesoko Biological Station, west-central Okinawa, Japan
Figure 32. (a, b) Crepidacantha longiseta Canu and Bassler: (a) NSMT-Te 1167, autozooids; (b) NSMT- Te 1169, ovicelled and non-ovicelled autozooids. (c, d) Crepidacantha poissonii (Audouin), NSMT-Te 1100: (c) ovicelled autozooids; (d) ovicelled and non-ovicelled autozooids. Panels are scanning electron microscopic images of dried, unbleached (a, c) or bleached (b, d) specimens. Scale bars: a, c = 300 µm; b, d = 200 µm.
Figure 39 in Rocky-intertidal cheilostome bryozoans from the vicinity of the Sesoko Biological Station, west-central Okinawa, Japan
Figure 39. Rhynchozoon ryukyuense sp. nov., NSMT-Te 1202 (a–c), NHMUK 2016.5.13.81 (d, e), NSMT- Te 1201 (f), all paratype specimens: (a) colony view; (b) marginal autozooids, showing aspect of suboral avicularian chamber; (c) marginal autozooids, showing shape and orientation of avicularian rostrum; (d) marginal autozooids, showing orifice shape; note denticles associated with basal pore chambers; (e) autozooids, with diamond-shaped frontal avicularia and hypertrophied suboral avicularia; (f) ovicelled autozooids. All panels are scanning electron microscopic images of bleached specimens. Scale bars: a = 1.0 mm; b–f = 300 µm.
Figure 27 in Rocky-intertidal cheilostome bryozoans from the vicinity of the Sesoko Biological Station, west-central Okinawa, Japan
Figure 27. (a–c) Robertsonidra argentea (Hincks), NSMT-Te 1149: (a) autozooids near colony margin; (b) autozooids, showing two types of avicularia; (c) ovicelled and non-ovicelled autozooids. (d–f) Robertsonidra porifera (Maplestone), NSMT-Te 1155: (d) autozooids near colony margin, one showing more-common large avicularium; (e) autozooids, one showing uncommon smaller avicularium; (f) ovicelled and non-ovicelled autozooids. All panels are scanning electron microscopic images of bleached specimens. Scale bars = 300 µm.
Figure 1 in Rocky-intertidal cheilostome bryozoans from the vicinity of the Sesoko Biological Station, west-central Okinawa, Japan
Figure 1. Partial map of Japan (lower right) showing the location of Okinawa (upper right), with the study area enlarged (left); black circles indicates sampling sites (SES, old breakwater near Sesoko Station; REEF, reef-fringe site; MIN, breakwater on Minna Island); black square indicates the Sesoko Station, Tropical Biosphere Research Centre, University of the Ryukyus; dark grey shading indicates land; light grey shading indicates areas of coral reef flat.
Figure 20 in Rocky-intertidal cheilostome bryozoans from the vicinity of the Sesoko Biological Station, west-central Okinawa, Japan
Figure 20. (a) Calyptotheca reniformis Tilbrook, 2006, NSMT-Te 1125, ovicelled and several nonovicelled autozooids. (b–d) Calyptotheca sesokoensis sp. nov., NSMT-Te 1128 (holotype): (b) autozooids at colony margin; (c) autozooids, one with rare lateral-oral avicularium; (d) ovicelled and nonovicelled autozooids. All panels are scanning electron microscopic images of bleached specimens. Scale bars = 300 µm.
Figure 6 in Rocky-intertidal cheilostome bryozoans from the vicinity of the Sesoko Biological Station, west-central Okinawa, Japan
Figure 6. (a–d) Corbulella extenuata Dick, Tilbrook, and Mawatari, NSMT-Te 1064: (a) autozooids; (b) oblique view of colony margin showing interzooidal connections and presumed vestigial ooecium at early stage of formation (far top right); (c) ancestrula and periancestrular zooids; (d) same ancestrula (asterisk) as in panel (c) after bleaching, with daughter zooids lost from left side. (e, f) Cranosina coronata (Hincks), NSMT-Te 1065: (e) autozooids (the central three showing regenerative, intramurally budded cystids); (f) autozooids at colony margin (central zooid with intramurally budded cystid). Panels are scanning electron microscopic images of dried (a, c) or bleached (b, d–f) specimens. Scale bars: a = 250 µm; b–d = 300 µm; e, f = 400 µm.
Figure 19 in Rocky-intertidal cheilostome bryozoans from the vicinity of the Sesoko Biological Station, west-central Okinawa, Japan
Figure 19. (a, b) Smittina nitidissima (Hincks), NSMT-Te 1119: (a) autozooids at colony margin; (b) ovicelled autozooids, with 0–2 lateral oral avicularia. (c, d) Smittoidea pacifica Soule and Soule, NSMT-Te 1120: (c) zooids at colony margin; (d) ovicelled and non-ovicelled autozooids. All panels are scanning electron microscopic images of bleached specimens. Scale bars = 300 µm.
Figure 10 in Rocky-intertidal cheilostome bryozoans from the vicinity of the Sesoko Biological Station, west-central Okinawa, Japan
Figure 10. (a) Vasignyella otophora (Kirkpatrick), NSMT-Te 1079: four autozooids from branched, erect colony. (b–h) Hippothoa petrophila sp. nov.: (b) NSMT-Te 1082 (paratype), part of uniserial colony, with two zooidal dilatations, or 'zooids' (arrowheads),linked by long caudal portion, or 'stolon'; (c) NHMUK 2016.5.13.18 (paratype), part of anastomosed uniserial colony; (d) NSMT-Te 1083 (paratype), autozooid with paired proximolateral zooeciules; (e) NSMT-Te 1082 (paratype), autozooidal orifice; (f) photomicrograph of dried specimen showing autozooid (az) that has budded an ovicelled female zooid (fz) from the lateral margin; (g) photomicrographs of the basal side of zooids, showing lateral (arrowheads) and distal (arrow) interzooidal connections; (h) NSMT-Te 1082, presumed ancestrula (a) that has given rise to a single daughter zooid (dz), with a non-connected zooid at lower right. Panels (f) and (g) are photomicrographs; all other panels are scanning electron microscopic images; the specimens in panels (c) to (e) were lightly bleached. Scale bars:a–c = 500 µm; d, h = 150 µm; e = 50 µm; f = 25 µm; g = 10 µm.
Figure 13 in Rocky-intertidal cheilostome bryozoans from the vicinity of the Sesoko Biological Station, west-central Okinawa, Japan
Figure 13. Celleporaria desperabilis Ryland and Hayward, NSMT-Te 1090: (a) young autozooids near colony margin; (b) young autozooids near colony margin, in frontodistal view; (c) primary orifice near colony margin; (d) autozooids, showing suboral avicularium adjacent to sinus; circular interzooidal openings indicated by arrowheads; (e) autozooid with pair of tiny avicularia lateral to orifice, and irregular interzooidal opening (arrowhead); (f) ovicells that appear to be aborted or incompletely developed, bounded by thickened rim distal to orifice. All panels are scanning electron microscopic images of the specimen after bleaching. Scale bars: a = 500 µm; b = 200 µm; c, e = 100 µm; d, f = 250 µm.
Figure 15 in Rocky-intertidal cheilostome bryozoans from the vicinity of the Sesoko Biological Station, west-central Okinawa, Japan
Figure 15. Parasmittina serrula Soule and Soule, (a, b) NSMT-Te 1099, (c, d) NSMT-Te 1100: (a) orifices, showing lyrula and condyles; (b), ovicelled autozooids, with small suboral avicularia; (c) ovicelled autozooids, with larger suboral avicularia; (d) ancestrula and first daughter zooid. All panels are scanning electron microscopic images of bleached specimens. Scale bars: a = 100 µm; b–d = 300 µm.
Figure 4 in Two new species of heavily calcified cyclostome bryozoans from the intertidal of Akkeshi Bay, Hokkaido, Japan
Figure 4. Favosipora ainui sp. nov., holotype, 2014.11.18.13: (A) colony surface showing autozooidal and kenozooidal apertures as well as the larger opening (left) of a symbiont tube; (B) two bicuspate autozooids surrounded by smaller kenozooids; (C) partly developed gonozooid with roof calcification growing centrifugally from the autozooids passing the brood chamber; (D) ooeciopore (centre), with flared ooeciostome, pseudoporous gonozooid roof and autozooidal apertures closed by pseudoporous terminal diaphragms; (E) two complete gonozooids, that on the left with some of the penetrant autozooids arranged connately. Scale bars: A, C, E = 500 µm; B, D = 200 µm.
Figure 2 in Two new species of Lauratonema (Nematoda: Lauratonematidae) from the intertidal zone of the East China Sea
Figure 2. Lauratonema macrostoma sp. nov. (A) lateral view of male head end, showing amphids and bacteria; (B) lateral view of male body part, showing spicule; (C) lateral view of female body part, showing eggs; (D) lateral view of female head end, showing buccal cavity; (E) lateral view of female tail. Scale bar: A–D = 10 µm; E = 25 µm.
Figure 3 in Two new species of Lauratonema (Nematoda: Lauratonematidae) from the intertidal zone of the East China Sea
Figure 3. Lauratonema dongshanense sp. nov. (A) lateral view of male head end, showing amphid and cephalic setae; (B) lateral view of female head end, showing buccal cavity; (C) lateral view of female head end, showing amphid and bacteria; (D) lateral view of female body part, showing eggs; (E, F) lateral view of male body part, showing spicules; (G) lateral view of male tail. Scale bar: A–F = 10 µm; G = 25 µm.
Figure 1 in Two new species of Lauratonema (Nematoda: Lauratonematidae) from the intertidal zone of the East China Sea
Figure 1. Lauratonema macrostoma sp. nov. (A) lateral view of male anterior part; (B) lateral view of female tail; (C) lateral view of male tail; (D) lateral view of female posterior part, showing reproductive system; (E) lateral view of female anterior part. Scale bar: A, B, C, E = 20 µm; D = 50 µm.
Data from: Long-term, high frequency in situ measurements of intertidal mussel bed temperatures using biomimetic sensors
At a proximal level, the physiological impacts of global climate change on ectothermic organisms are manifest as changes in body temperatures. Especially for plants and animals exposed to direct solar radiation, body temperatures can be substantially different from air temperatures. We deployed biomimetic sensors that approximate the thermal characteristics of intertidal mussels at 71 sites worldwide, from 1998-present. Loggers recorded temperatures at 10–30 min intervals nearly continuously at multiple intertidal elevations. Comparisons against direct measurements of mussel tissue temperature indicated errors of ~2.0–2.5 °C, during daily fluctuations that often exceeded 15°–20 °C. Geographic patterns in thermal stress based on biomimetic logger measurements were generally far more complex than anticipated based only on 'habitat-level' measurements of air or sea surface temperature. This unique data set provides an opportunity to link physiological measurements with spatially- and temporally-explicit field observations of body temperature.
Data from: Multimodal in situ datalogging quantifies inter-individual variation in thermal experience and persistent origin effects on gaping behavior among intertidal mussels (Mytilus californianus)
In complex habitats, environmental variation over small spatial scales can equal or exceed larger-scale gradients. This small-scale variation may allow motile organisms to mitigate stressful conditions by choosing benign microhabitats, whereas sessile organisms may rely on other behaviors to cope with environmental stresses in these variable environments. We developed a monitoring system to track body temperature, valve gaping behavior, and posture of individual mussels (Mytilus californianus) in field conditions in the rocky intertidal zone. Neighboring mussels' body temperatures varied by up to 14°C during low tides. Valve gaping during low tide and postural adjustments, which could theoretically lower body temperature, were not commonly observed. Rather, gaping behavior followed a tidal rhythm at a warm, high intertidal site; this rhythm shifted to a circadian period at a low intertidal site and for mussels continuously submerged in a tidepool. However, individuals within a site varied considerably in time spent gaping when submerged. This behavioral variation could be attributed in part to persistent effects of mussels' developmental environment. Mussels originating from a wave-protected, warm site gaped more widely, and they remained open for longer periods during high tide than mussels from a wave-exposed, cool site. Variation in behavior was modulated further by recent wave heights and body temperatures during the preceding low tide. These large ranges in body temperatures and durations of valve closure events - which coincide with anaerobic metabolism - support the conclusion that individuals experience "homogeneous" aggregations such as mussel beds in dramatically different fashion, ultimately contributing to physiological variation among neighbors.
Paulina Polder Intertidal Elevation
Paulina Polder Intertidal Elevation from Google Earth Engine
Figs. 1-3. Hebrus murphyi, new species. 1 in Hebrus Murphyi, New Species (Heteroptera: Hebridae) From An Intertidal Mangrove Habitat In Burias Island, Philippines
Figs. 1-3. Hebrus murphyi, new species. 1. Habitus of male, dorsal aspect. 2. Head, lateral aspect. 3. Left paramere of male, lateral aspect.
Dataset from: Tolerance to aerial exposure influences distributional patterns in multi-species intertidal seagrass meadows
<p>This is the dataset for an article published in Marine Environmental Research titled, 'Tolerance to aerial exposure influences distributional patterns in multi-species intertidal seagrass meadows', in October 2023. Following is the abstract for the paper for which this was the primary data:</p><p>Multi-specific seagrass meadow assemblages dominate most tropical intertidal regions but the relative role of environmental stress in determining distribution patterns is still uncertain. Here we combine observational and experimental approaches to examine aerial exposure as a factor driving species occurrence patterns in intertidal meadows of the Andaman archipelago, where up to 6 seagrass species co-occur. In the studied meadow, patterns of exposure did not map onto distance from the coast, instead creating a patchy matrix of exposure, based on fine-scale bathymetric differences. Distributional surveys showed that seagrass species were similarly patchy, often tracking the degree of aerial exposure during low tide. While some species (<i>Halophila ovalis, Halophila minor,</i> and <i>Thalassia hemprichii</i>) frequently occurred in submerged or subtidal areas and were rarely found in completely exposed areas, other species (<i>Cymodocea rotundata</i>, <i>Halophila beccarii,</i> and <i>Halodule uninervis</i>) also occupied areas that were subject to partial or complete aerial exposure during low tide. To confirm this pattern, we used field-based transplant experiments, employing a natural gradient of tidal exposure to subject six seagrass species to different desiccation exposure times. After a month, <i>H. beccarii</i> and <i>H. uninervis</i> transplants survived in areas that sustained more than 3 h of aerial tidal exposure without significant mortality, compared with other species (<i>H. ovalis, H. minor, T. hemprichii, C. rotundata</i>) that showed dramatic shoot mortality at the same exposure regimes. For all species, 4 h represented the upper limit of exposure, in both experimental and distributional studies. However, despite their wider tolerance of exposure to air, <i>H. beccarii</i> and <i>H. uninervis</i> did not dominate the entire meadow. This could be a result either of their poor tolerance to other environmental factors or their lower competitive abilities among other mechanisms. This suggests that in tropical multi-specific meadows, strong environmental filters could override clear intertidal zonation to create patchy matrices based on species tolerances.</p>
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Allen Brain Atlas
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International Brain Laboratory public data
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