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46 results for “zooplankton species”
The old and the large may suffer disproportionately during episodes of high temperature: evidence from a keystone zooplankton species
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Data from: Sampling effects drive the species-area relationship in lake zooplankton
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Higher predation rate need not and did not lead to higher risk-induced trait responses in related zooplankton species
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Breaking Free from Thermodynamic Constraints: Thermal Acclimation and Metabolic Compensation in a freshwater zooplankton species
<p>Ectothermic organisms' respiration rates are largely controlled by environment temperatures and the ability to meet metabolic demands at high temperatures sometimes sets their upper thermal limit. Organisms are hypothesized to exhibit acclimatory effects, adjusting their metabolism and physiology by deceleration of metabolic processes including respiration below Arrhenius expectations based in temperature alone. Such deceleration is termed metabolic compensation. We test the hypothesis that either heritable (among genotypes) or plastic (between acclimation regimes) heat tolerance differences can be explained by metabolic compensation in the eurythermal freshwater zooplankton crustacean Daphnia magna. We measured oxygen consumption rates over a range of assay temperatures (5°C - 37°C) in 8 genotypes of Daphnia representing a range of previously reported genotype-specific acute heat tolerance values and, in a narrower range of temperatures (10°C - 35°C) in Daphnia with different acclimation history (either 10°C or 25°C). In a ramp-up experiment we discovered no difference in temperature-specific respiration rates between heat tolerant and heat-sensitive genotypes. In contrast, we observed compensatory differences in respiration rates at both extremes of the temperature range studied. Notably, there was a deceleration of oxygen consumption at higher temperature in the 25°C-acclimated Daphnia relative to their 10°C-acclimated counterparts, observed in active, but not anaesthetized animals, a pattern corroborated by similar changes in filtering rate and, partly, by changes in mitochondrial membrane potential. Daphnia exposed to a sublethal temperature (35°C) with a 24-hour recovery period at a 25°C-acclimation temperature showed no difference in respiration compared to unexposed 25°C-acclimated Daphnia, indicating that the reduction of respiration is not caused by irreversible damage. Response time necessary to acquire the respiratory adjustment to high temperature was much lower than to low temperature, indicating that metabolic compensation at the lower temperatures require slower structural changes.</p>
Data on zooplankton species and lake environments from 29 lakes in southern Ontario, Canada
<p>The data published here were used to determine temporal variability in the drivers of zooplankton community composition, and to identify associations between individual species and different environmental metrics. Here, we provide two datasets, which are used in the paper by Sinclair et al. titled: "Consistent and transient drivers of freshwater zooplankton communities". Each dataset is provided as a separate tab in a single Excel spreadsheet. The "Info" tab provides more detail on each. The first dataset ("Zooplankton community") provides the total abundance of each adult zooplankton species detected across 29 lakes from southern Ontario, Canada in 2013, 2014, 2015, and 2016. The second dataset ("Lake environments") contains information on the depth, area, and water chemistry of each sampled lake in each year. Collection methods and dates are detailed in the associated article and variable descriptions and units are included in the "Info" tab.</p>
FIGURE 10 in Three new cryptic species of the freshwater zooplankton genus Holopedium (Crustacea: Branchiopoda: Ctenopoda), revealed by genetic methods
FIGURE 10. Representative photomicrographs of Holopedium atlanticum. (a,b) Lateral views of female in jelly coat stained with fuschian red. (c) Lateral view of female head and anterior jelly curl. Santeetlah, North Carolina, October 30, 1993. (d) Lateral view of female head. (e) Lateral view of female abdomen. Lake James, North Carolina, December 13, 1992. (f) Lateral view of female postabdomen. (g) Lateral view of ventral carapace spinules. Lake James, North Carolina, October 31, 1993. (a,b,d,f) from Digdeguash Lake, New Brunswick, June 15, 1994.
FIGURE 9 in Three new cryptic species of the freshwater zooplankton genus Holopedium (Crustacea: Branchiopoda: Ctenopoda), revealed by genetic methods
FIGURE 9. Representative photomicrographs of Holopedium acidophilum. (a,b) Lateral view of female in jelly coat stained with dilute fuschain red. (c) Lateral view of female head and anterior jelly curl. Jelly coat stained with dilute fuschian red. (d) Lateral view of female abdomen. (e,f) Lateral views of female postabdomen (g) Lateral view of female postabdomen, Red Rock Pond, New Brunswick, June 1, 1992. (h) Lateral view of brood pouch margin and eggs. (i) Lateral view of ventral carapace spinules. (j,k) Lateral views of male with jelly coat removed. (l) Frontal view of male biramous antennae. (m) Lateral view of hook on first thoracic limb of male. (n) Lateral view of male postabdomen. (a–c, h, j–n) from Red Rock Pond, New Brunswick, June 15, 1994. (d–f, i) from Saunders Pond, Oregon, April 16, 1993.
FIGURE 5 in Three new cryptic species of the freshwater zooplankton genus Holopedium (Crustacea: Branchiopoda: Ctenopoda), revealed by genetic methods
FIGURE 5. Morphological characters used in the discrimination of Holopedium. Postabdominal claws (a) with and (b) without a basal spine are illustrated. The jelly coat is not illustrated.
FIGURE 4 in Three new cryptic species of the freshwater zooplankton genus Holopedium (Crustacea: Branchiopoda: Ctenopoda), revealed by genetic methods
FIGURE 4. Putative geographic distribution of Holopedium species. Dots indicate populations where species assignments were confirmed by genetic analyses. Dark shaded areas represent the hypothesized range of each species based on results from this study and from distribution data from 1,827 localities inhabited by Holopedium, obtained from literature reports or by sampling (see Rowe 2000). Since several species are morphologically cryptic while the species complexes can be readily distinguished, the areas between or adjacent to genetic localities are tentatively marked as that same species, provided that there are Holopedium records there belonging to the same complex. Pending further evidence, all South American localities are here shaded as H. amazonicum and most Eurasian localities as H. gibberum s.s., but further cryptic species may be detected in the future. Definitive species assignments for populations in Greenland and India, which are currently described as separate species, require genetic evidence (see text), but morphological traits indicate that they do belong to the H. gibberum complex. Their distributions are shown along with H. gibberum s.s. (inset map in part b). a) H. glacialis n.sp., b) H. gibberum s.s., c) H. atlanticum n.sp., d) H. acidophilum n.sp., and e) H. amazonicum s.s.
FIGURE 6 in Three new cryptic species of the freshwater zooplankton genus Holopedium (Crustacea: Branchiopoda: Ctenopoda), revealed by genetic methods
FIGURE 6. Representative photomicrographs and drawings of Holopedium gibberum. (a) Lateral view of female with jelly coat removed. Old Crow 10, Yukon, August 15, 1997. (b) Lateral view of female head and anterior jelly curl. Jelly coat stained with fuschian red. (c) Lateral view of female postabdomen. Longstaff Bluff 1, Nunavut, August 16, 1994. (d) Lateral view of female postabdominal claws. Mayer Lake, British Columbia, August 7, 1997. (e) Ventral view of female postabdomen. (f) Lateral view of female postabdomen. (g) Drawing of lateral view of male in jelly coat. (h) Drawing of lateral view of male postabdomen. (i) Drawing of lateral view of biramous antennae of male. (j) Drawing of lateral view of first thoracic limb of a male. (b,e,f) from Steensby 3, Nunavut, August 13, 1994. (g,j) from Lilljeborg 1901. (h,i) from Sars 1865.
FIGURE 8 in Three new cryptic species of the freshwater zooplankton genus Holopedium (Crustacea: Branchiopoda: Ctenopoda), revealed by genetic methods
FIGURE 8. Representative photomicrographs of Holopedium amazonicum. (a) Lateral view of ovigerous female with jelly coat removed. (b) Lateral view of brooding female with jelly coat removed. (c) Lateral view of female head. (d) Partial lateral view of female. (e) Lateral view of female head. (f) Lateral view of female postabdomen. Lago Coari, Amazonas, May 24, 1996. (g) Lateral view of brood pouch margin and eggs. (h) Lateral view of ventral carapace margin. (a–e, g–h) from Lago Caju, Amazonas, September 24, 1998.
FIGURE 3 in Three new cryptic species of the freshwater zooplankton genus Holopedium (Crustacea: Branchiopoda: Ctenopoda), revealed by genetic methods
FIGURE 3. NJ phenogram of Holopedium based upon 17 COI haplotypes, rooted using Sida crystallina. Boostrap support values (based upon 10,000 replicates) are shown for major clusters and deeper nodes, and the scale bar shows K2P genetic distance. Terminal branch labels indicate the clade number, followed by the haplotype number. Haplotypes of reference populations collected from relatively near the type localities of H. gibberum and H. amazonicum are indicated with one and two asterisks, respectively. The two clusters containing these haplotypes are considered to represent these species sensu strictu, while the remaining clusters are described here as new species.
FIGURE 2 in Three new cryptic species of the freshwater zooplankton genus Holopedium (Crustacea: Branchiopoda: Ctenopoda), revealed by genetic methods
FIGURE 2. UPGMA phenogram showing genetic distances, based upon allozyme data, among 121 Holopedium populations. Only those collections known to contain a single species, due to being either invariant or in H-W equilibrium, are included here. Nei's (1972) genetic distance is indicated on the scale bar. The geographic distributions of the two major groups are consistent with those of the two initially described species of Holopedium, and these groups are therefore named after these species, H. gibberum and H. amazonicum. New species names are assigned to two clusters on the basis of allozyme, mtDNA, distributional, and morphological information (see text for further information and justification). Asterisks designate those populations for which mtDNA results are available; allozyme and mtDNA clusters are concordant. Double asterisks and haplotype numbers are given for those populations having sequence data presented in Fig. 4.
FIGURE 1 in Three new cryptic species of the freshwater zooplankton genus Holopedium (Crustacea: Branchiopoda: Ctenopoda), revealed by genetic methods
FIGURE 1. Maps of Holopedium populations sampled for genetic analyses. Exact geographic coordinates and habitat names are provided in Appendix A. Populations sampled from outside North America are shown on the inset global map. Type localities for the two initially described species of Holopedium are indicated with stars on the inset map and were not included in this study, although (relatively) nearby collections were available. North American freshwater biogeographic provinces (after Burr & Mayden 1992) are shown, and the names of those from which samples were collected are listed in the legend.
FIGURE 7 in Three new cryptic species of the freshwater zooplankton genus Holopedium (Crustacea: Branchiopoda: Ctenopoda), revealed by genetic methods
FIGURE 7. Representative photomicrographs of Holopedium glacialis. (a) Lateral view of female in jelly coat stained with dilute fuschian red. Wren Lake, Ontario, June 13, 1994. (b,c) Lateral views of female head. (d) Lateral view of female postabdomen. (e) Lateral view of ventral carapace spinules. (f) Lateral view of male with jelly coat removed. (g) Lateral view of male head and antennae. (h) Lateral view of male antennae. (i) Lateral view of hook on male antennae. (j) Lateral view of hooks on first pair of male thoracic limbs. (k) Lateral view of male postabdomen. (l) Lateral view of male postabdominal claw. (m) Lateral view of ventral carapace spines of a male. (b–e) from Como Lake, Ontario, June 28, 1992. (f–m) from Blue Chalk Lake, Ontario, October 17, 1996.
Projections of spatial distributions of suitable environmental conditions for key Baltic Sea zooplankton species - Data
<p>This repository contains seven occurrences dataset which represent the station where the species have been identified, ranging from 2000 to 2020. The environmental projections for the period 2010-2020, as well as future projection on two horizons: from 2040 to 2050 and from 2090 to 2100 on two different scenarios: SSP245 and SSP585. The occurrences have been exctracted from OBIS (https://obis.org) and the environmental projections from Bio-ORACLE (https://bio-oracle.org).</p> <p> </p> <p>Occurrences datasets: </p> <ul> <li><em>Temora longicornis</em></li> <li><em>Centropages hamatus</em></li> <li><em>Limnocalanus macrurus macrurus</em></li> <li><em>Evadne nordmanni</em></li> <li><em>Acartia tonsa</em></li> <li><em>Acartia longiremis</em></li> <li><em>Acartia bifilosa</em></li> </ul> <p> </p> <p>Projections:</p> <ul> <li>Projection Baseline 2010-2020</li> <li>Projection 2040-2050 SSP245</li> <li>Projection 2090-2100 SSP245</li> <li>Projection 2040-2050 SSP585</li> <li>Projection 2090-2100 SSP585</li> </ul> <p> </p> <p> </p> <p> </p>
Data from: Eco-evolutionary dynamics in urbanized landscapes: evolution, species sorting and the change in zooplankton body size along urbanization gradients
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Data from: Zooplankton species diversity in the temporary wetland system of the Savannah River Site, South Carolina, USA
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Data from: Trophic niche breadth of pond zooplankton species using stable isotope analysis and the relationship with the abiotic and biotic factors
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Breaking Free from Thermodynamic Constraints: Thermal Acclimation and Metabolic Compensation in a freshwater zooplankton species
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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)
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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.