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146 results for “sessile”
SBC LTER: Reef: Kelp Forest Community Dynamics: Cover of sessile organisms, Uniform Point Contact
These data describe the cover of sessile invertebrates, understory macroalgae, and bottom substrate types as determined by a uniform point contact method. The presence of over 150 taxa of sessile invertebrates and macroalgae are recorded at 80 uniformly spaced points along permanent 40m x 2m transects. Multiple species can be recorded at any given point. Percent cover of a given species on a transect can be estimated from UPC observations as the fraction of total points at which that species was present x 100. The total percent cover of all species combined using this method can exceed 100%; however, the percent cover of any single species cannot exceed 100%. These data are part of SBC LTERs kelp forest monitoring program, which began in 2000 and was designed to track long-term patterns in species abundance and diversity of reef-associated organisms in the Santa Barbara Channel, California, USA. The sampling locations in this dataset include nine reef sites along the mainland coast of the Santa Barbara Channel and at two sites on the north side of Santa Cruz Island. These sites reflect several oceanographic regimes in the channel and vary in distance from sources of terrestrial runoff. Data collection began in 2000 and this dataset is updated annually. The time period of data collection varied among the 11 kelp forest sites. Sampling at BULL, CARP, and NAPL began in 2000, sampling at the other 6 mainland sites (AHND, AQUE, IVEE, GOLB, ABUR, MOHK) began in 2001 (transects 3, 5, 6, 7, 8 at IVEE were added in 2011). Data collection at the two Santa Cruz Island sites (SCTW and SCDI) began in 2004. See Methods for more information. The two tables in this data package include: 1) The percent cover of sessile invertebrate and understory macroalage; and 2) the percent cover of bottom substrate.
SBC LTER: Reef: Seasonal Kelp Forest Community Dynamics: Cover of sessile organisms, Uniform Point Contact
These data describe the percent cover of sessile invertebrates and understory macroalgae within permanent plots of SBCLTER's seasonal kelp forest monitoring program to track long-term patterns in species abundance and diversity. Percent cover was determined using a uniform point contact method that consists of noting the identity and relative vertical position of all organisms under 80 uniformly placed points located within a 1 m wide band centered on permanent 40 m transects in each sampling plot. Each species may only be recorded once per point. Using this method, the percent cover of all species combined may exceed 100%, however, the maximum percent cover possible for any single species cannot exceed 100%. The experiment was initiated in 2008 at five reef sites along the mainland coast of the Santa Barbara Channel.
SBC LTER: Reef: Long-term experiment: Kelp removal: Cover of sessile organisms, Uniform Point Contact
These data describe the percent cover of sessile invertebrates and understory macroalgae within permanent plots of a long-term experiment designed to examine trajectories of change in the structure and productivity of kelp forest communities in response to changes in the frequency and severity of disturbance to giant kelp. Percent cover was determined using a uniform point contact method that consists of noting the identity and relative vertical position of all organisms under 80 uniformly placed points located within a 1 m wide band centered on permanent 40 m transects in each sampling plot. Each species may only be recorded once per point. Using this method, the percent cover of all species combined may exceed 100%, however, the maximum percent cover possible for any single species cannot exceed 100%. The experiment was initiated in 2008 at five reef sites along the mainland coast of the Santa Barbara Channel and included an annual kelp removal treatment designed to simulate increases in the frequency and severity of winter wave disturbance and a continual kelp removal treatment that allowed the effects of giant kelp on the community to be evaluated. The last experimental removals of giant kelp occurred in winter 2016 or winter 2017, depending on the site. Data collection continued in all plots until spring 2023 to document the recovery trajectory of the reef fish community following the cessation of experimental kelp removal.
Benthic algae and sessile invertebrate survey data from LTER and other reef ecosystems
Understanding factors that influence ecological stability is a key question in ecology. Population ecology has highlighted that synchrony within a species across locations is an important indicator of species stability. Community ecology, in contrast, has highlighted that asynchrony between species within a location may enhance the stability of aggregate properties (such as total productivity). We compiled LTER and other data across 20 metacommunities in grassland and coastal marine biomes to integrate population and community approaches to synchrony to understand drivers of ecosystem stability at different scales. All datasets feature long-term (10-34 years) measurements of the primary producer community across multiple (6-49) discrete plots, with taxonomic identifications to species in most or all cases. This data package contains data from coastal marine sites: Santa Barbara Coastal LTER; Moorea Coral Reef; US Virgin Islands; Maui, Hawaii; and the Florida Keys.
Artificial reefs geographical location matters more than shape, age and depth for sessile invertebrate colonization in the Gulf of Lion (NorthWestern Mediterranean Sea)
<p>Artificial reefs (ARs) have been used to support fishing activities. Sessile invertebrates are essential components of trophic networks within ARs, supporting fish productivity. However, colonization by sessile invertebrates is possible only after effective larval dispersal from source populations, usually in natural habitat. While most studies focused on short term colonization by pioneer species, we propose to test the relevance of geographic location, shape, age and depth of immersion on the ARs long term colonization by species found in natural stable communities in the Gulf of Lion. We recorded the presence of five sessile invertebrates species, with contrasting life history traits and regional distribution in the natural rocky habitat, on ARs with different shapes deployed during two immersion time periods (1985 and the 2000s) and in two depth ranges (<20m and >20m). At the local level (~5kms), neither shape, depth nor immersion duration differentiated ARs assemblages. At the regional scale (>30kms), colonization patterns differed between species, resulting in diverse assemblages. This study highlights the primacy of geographical positioning over shape, immersion duration and depth in ARs colonization, suggesting it should be accounted for in maritime spatial planning.</p>
Text-fig. 9. Miscellaneous leaves. a: Leaf of Anacardiaceae, UAPC-ALTA S 59513. b: Sapindaceous leaf, BBM-PAL-P000046. c: Twig with compound leaves of Averrhoites affinis, UAPC-ALTA S 67694. d, e: cf. Morus. Finely serrate leaf with actinodromous venation, prominent agrophic veins and strongly percurrent tertiary veins, UAPC-ALTA S 67695. f: Leaf with strongly apically arched upper pairs of secondary veins and entire margins, UAPC-ALTA S 59504. g: Compound leaf, UAPC-ALTA S 59504A. h: Detail of (g) showing one leaflet. i: Incomplete basal part of a lamina with rounded base and entire margin, UAPC-ALTA S 6565. j: Compound leaf with leaflets sessile on a stout rachis, UAPC-ALTA sn. Scale bars: a, c, d, i = 2 cm, b, e–h, j = 1 cm. in The Early Eocene Flora Of Horsefly, British Columbia, Canada And Its Phytogeographic Significance
Text-fig. 9. Miscellaneous leaves. a: Leaf of Anacardiaceae, UAPC-ALTA S 59513. b: Sapindaceous leaf, BBM-PAL-P000046. c: Twig with compound leaves of Averrhoites affinis, UAPC-ALTA S 67694. d, e: cf. Morus. Finely serrate leaf with actinodromous venation, prominent agrophic veins and strongly percurrent tertiary veins, UAPC-ALTA S 67695. f: Leaf with strongly apically arched upper pairs of secondary veins and entire margins, UAPC-ALTA S 59504. g: Compound leaf, UAPC-ALTA S 59504A. h: Detail of (g) showing one leaflet. i: Incomplete basal part of a lamina with rounded base and entire margin, UAPC-ALTA S 6565. j: Compound leaf with leaflets sessile on a stout rachis, UAPC-ALTA sn. Scale bars: a, c, d, i = 2 cm, b, e–h, j = 1 cm.
Trillium sessile (Liliaceae) - inflorescence - lateral view of flower
Image of Trillium sessile (Liliaceae) - inflorescence - lateral view of flower
Trillium sessile (Liliaceae) - inflorescence - closeup of flower interior
Image of Trillium sessile (Liliaceae) - inflorescence - closeup of flower interior
Trillium sessile (Liliaceae) - stem - showing leaf bases
Image of Trillium sessile (Liliaceae) - stem - showing leaf bases
Trillium sessile (Liliaceae) - leaf - on upper stem
Image of Trillium sessile (Liliaceae) - leaf - on upper stem
Trillium sessile (Liliaceae) - whole plant - in flower - general view
Image of Trillium sessile (Liliaceae) - whole plant - in flower - general view
Trillium sessile (Liliaceae) - inflorescence - closeup of flower interior
Image of Trillium sessile (Liliaceae) - inflorescence - closeup of flower interior
Trillium sessile (Liliaceae) - leaf - on upper stem
Image of Trillium sessile (Liliaceae) - leaf - on upper stem
Trillium sessile (Liliaceae) - whole plant - in flower - general view
Image of Trillium sessile (Liliaceae) - whole plant - in flower - general view
Trillium sessile (Liliaceae) - stem - showing leaf bases
Image of Trillium sessile (Liliaceae) - stem - showing leaf bases
Impact of the 2011 Tohoku earthquake on the species diversity of rocky intertidal sessile assemblages
<p>The impacts of large-scale disturbance events on the species diversity of rocky intertidal sessile assemblages across multiple spatial scales are not well understood. To evaluate the influence of the 2011 Tohoku Earthquake on alpha and beta diversities of rocky intertidal sessile assemblages, we censused sessile assemblages in the mid-shore zone from 2011 to 2019. The census was conducted across 22 study sites on five rocky shores along 30 km of the Sanriku Coast of Japan, which is located 150–160 km north–northwest of the earthquake epicenter. Alpha diversity was measured with three Hill numbers (<em>H</em><sub>0</sub>, <em>H</em><sub>1</sub>, and<em> H</em><sub>2</sub>), which represent the number of equally common species that would exist in a community with the same diversity as the sampled community, with higher values of the subscript indicating more weight placed on abundant species. Beta diversity was measured with two metrics (<em>BD</em><sub>total</sub> at two spatial scales). Values were compared between the years 2011–2019 and the pre-earthquake period (2003–2010). The results show that the Tohoku Earthquake significantly altered the species diversity of intertidal sessile assemblages across multiple spatial scales. All diversity metrics obtained at multiple spatial scales (i.e., alpha diversities: <em>H</em><sub>0</sub>, <em>H</em><sub>1,</sub> and <em>H</em><sub>2</sub>; beta diversities: <em>BD<sub>t</sub></em><sub>otal</sub> at the shore and regional scales) decreased immediately after the earthquake and then increased in subsequent years. Two years after the earthquake, <em>H</em><sub>0</sub> recovered to within the range of pre-earthquake values and <em>H</em><sub>1</sub> and <em>H</em><sub>2</sub> became significantly higher than pre-earthquake values. Most metrics of alpha and beta diversities recovered to pre-earthquake levels after several years, but regional <em>BD</em><sub>total</sub> remained low for a longer period.</p>
Data from: The effect of external flow on 3D orientation of a microscopic sessile suspension feeder, Vorticella convallaria
<p><em>Vorticella convallaria</em> are microscopic sessile suspension feeders that live attached to substrates in aquatic environments. They feed using a self‐generated current and help maintain the health of aquatic ecosystems and wastewater treatment facilities by consuming bacteria and detritus. Their environmental impact is mediated by their feeding rate. In ambient flow, feeding rates are highly dependent on an individual's orientation relative to the substrate and the flow. Here, we investigate how this orientation is impacted by flow speed. Furthermore, we examined whether individuals actively avoid orientations unfavorable for feeding. We exposed individuals to unidirectional laminar flow at shear rates of 0, 0.5, 1.0, and 1.5 s<sup>−1</sup>, and recorded their 3D orientation using a custom biplanar microscope. We determined that <em>V. convallaria</em> orientation became progressively tilted downstream as the shear rate increased, but individuals were still able to actively reorient. Additionally, at higher shear rates, individuals spent a larger fraction of their time in orientations with reduced feeding rates. Our shear rates correspond to freestream flows on the scale of mm s<sup>−1</sup> to cm s<sup>−1</sup> in natural environments.</p>
Fig. 1 in Influence of environmental factors and sessile biota on vagile epibionts: The case of amphipods in marinas across a regional scale Abstract
Fig. 1: Composition (percentage of total abundance) of amphipod assemblages occurred on pontoons of each marina (CHI = Chipiona, AME = Puerto. América, BAR = Barbate, LIN= La Línea, FUE = Fuengirola, ALM = Almería. Numbers represents the three pontoons). Exotic species are represented by red textures.
Fig. 6 in Influence of environmental factors and sessile biota on vagile epibionts: The case of amphipods in marinas across a regional scale Abstract
Fig. 6: RDA graphic showing the similarity between the amphipod community present in each marina and its relationship with the physical-chemical parameters (CHI = Chipiona, AME = Puerto. América, BAR = Barbate, LIN= La Línea, FUE = Fuengirola, ALM = Almería; Green = Atlantic; Orange = Mediterranean)..
Figure 3 in The first finding of sessile ciliates Vorticella pyriforme Stiller, 1939 and Zoothamnium sinense Song, 1991 (Ciliophora, Peritrichia) in the Black Sea
Figure 3. General view of the colony Zoothamnium sinense Song, 1991 (original, in vivo), scale bar: 250 µm.
ScienceDex guides
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.