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Shortgrass Steppe site, station Treatment 4 (water and nitrogen addition) for ESA study, study of plant density of Leucocrinum montanum in units of numberPerMeterSquared on a yearly timescale

The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Shortgrass Steppe (SGS) contains plant density of Leucocrinum montanum measurements in numberPerMeterSquared units and were aggregated to a yearly timescale.

Shortgrass Steppe site, station Treatment 4 (water and nitrogen addition) for ESA study, study of plant density of Aristida longiseta in units of numberPerMeterSquared on a yearly timescale

The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Shortgrass Steppe (SGS) contains plant density of Aristida longiseta measurements in numberPerMeterSquared units and were aggregated to a yearly timescale.

Shortgrass Steppe site, station Treatment 4 (water and nitrogen addition) for ESA study, study of plant density of Haplopappus spinulosus in units of numberPerMeterSquared on a yearly timescale

The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Shortgrass Steppe (SGS) contains plant density of Haplopappus spinulosus measurements in numberPerMeterSquared units and were aggregated to a yearly timescale.

Shortgrass Steppe site, station Treatment 4 (water and nitrogen addition) for ESA study, study of plant density of Salsola iberica in units of numberPerMeterSquared on a yearly timescale

The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Shortgrass Steppe (SGS) contains plant density of Salsola iberica measurements in numberPerMeterSquared units and were aggregated to a yearly timescale.

Shortgrass Steppe site, station Treatment 4 (water and nitrogen addition) for ESA study, study of plant density in units of numberPerMeterSquared on a yearly timescale

The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Shortgrass Steppe (SGS) contains plant density measurements in numberPerMeterSquared units and were aggregated to a yearly timescale.

SGS-LTER Effects of water and nitrogen additions on aboveground biomass in shortgrass ecosystems on the Central Plains Experimental Range, Nunn, Colorado, USA 1997-2011, ARS Study Number 143

This data package was produced by researchers working on the Shortgrass Steppe Long Term Ecological Research (SGS-LTER) Project, administered at Colorado State University. Long-term datasets and background information (proposals, reports, photographs, etc.) on the SGS-LTER project are contained in a comprehensive project collection within the Digital Collections of Colorado (http://digitool.library.colostate.edu/R/?func=collections&collection_id=3429). The data table and associated metadata document, which is generated in Ecological Metadata Language, may be available through other repositories serving the ecological research community and represent components of the larger SGS-LTER project collection. The objective of this research is to evaluate the long-term response of shortgrass ecosystems to additional water and nitrogen inputs. An experiment was conducted during the IBP project (1970-1975) in which water and nitrogen were applied (Lauenroth et al. 1978, Dodd and Lauenroth 1979, Milchunas and Lauenroth 1995). While we gained an enormous increment in our knowledge about shortgrass ecosystems from this experiment it raised as many questions as it answered. One of the problems was that the treatments were very high levels of nitrogen (100-150kg/ha N) and water (600 mm/growing season) additions. Additional information and referenced materials can be found: http://hdl.handle.net/10217/85629.

SGS-LTER Effects of water and nitrogen additions on carbon and nitrogen in shortgrass ecosystems on the Central Plains Experimental Range, Nunn, Colorado, USA 1997-2011, ARS Study Number 143

SGS-LTER Effects of water and nitrogen additions on plant species density and cover in shortgrass ecosystems on the Central Plains Experimental Range, Nunn, Colorado, USA 1997-2011, ARS Study Number 143

opencc-zeroDec 2017View details →

dryad32/100

Data from: Responses of growing‐season soil respiration to water and nitrogen addition as affected by grazing intensity

1. Most grasslands in the world, including the semi-arid steppe in China, are threatened by nitrogen deposition, precipitation change, and livestock grazing, which greatly affect soil carbon processes (e. g., soil respiration). Although the individual effects of nitrogen deposition and precipitation change on soil respiration are well understood, how their effects on soil respiration are altered by different grazing intensities is unclear. 2. To determine how the effects of nitrogen deposition and precipitation change on soil respiration are affected by grazing intensity, we conducted an experiment in a semi-arid steppe involving areas that experienced 10 years of no, light, moderate, or heavy grazing. These areas were treated with water addition (110 mm, 30% of the mean annual precipitation) and nitrogen addition (10.5 g m-2 yr-1). 3. Our results showed that relative to no grazing, grazing decreased growing-season soil respiration by 10-19%. The decline in soil respiration was mainly via its negative effects on aboveground net primary productivity (ANPP) and the fungi:bacteria ratio with light grazing, mainly via its negative effects on ANPP and leaf nitrogen content with moderate grazing, and mainly via its negative effects on ANPP, root biomass, microbial biomass, and the fungi:bacteria ratio with heavy grazing. 4. Across all grazing intensities, both water and water+nitrogen addition increased growing-season soil respiration, whereas nitrogen addition decreased growing-season soil respiration. Water addition increased growing-season soil respiration mostly via its positive effect on ANPP with no grazing and with low grazing, and mostly via its positive effects on both plant and microbial variables with moderate and heavy grazing. The pathways determining the nitrogen addition-induced decline in growing-season soil respiration was the same within each of the four levels of grazing and mostly resulted from its negative effect on microbial variables. 5. Our results indicate that the effects of climate change on growing-season soil respiration and other soil carbon processes in grasslands depend on grazing intensity. The findings suggest that grazing intensity should be considered in future manipulation experiments and should be included in carbon models in order to accurately simulate soil carbon dynamics under scenarios of climate change in grassland ecosystems.

opennotspecifiedDec 2008View details →

FIGURE 6 in Dupliciporia lanterna n. sp. (Digenea: Zoogonidae) from Priacanthus hamrur (Perciformes: Priacanthidae) and additional zoogonids parasitizing fishes from the waters off New Caledonia

FIGURE 6. Dupliciporia sp. (= Parasteganoderma sp. of El-Labadi et al. [2006]) ex. Pristigenys niphonia, Gulf of Aqaba. Ventral view. BMNH 2005.4.13.40. Abbreviations: see legend to figures 1-4. Scale-bar: 1mm.

opennotspecifiedDec 2008View details →

FIGURES 1–5. Dupliciporia lanterna n in Dupliciporia lanterna n. sp. (Digenea: Zoogonidae) from Priacanthus hamrur (Perciformes: Priacanthidae) and additional zoogonids parasitizing fishes from the waters off New Caledonia

FIGURES 1–5. Dupliciporia lanterna n. sp. 1. Ventral view of holotype. 2. Ventral view of oral sucker. 3. Lateral view of terminal genitalia. 4. Proximal female system, ventral view, eggs omitted for clarity. 5. Egg. Abbreviations: ce, posterior extent of caecum; cs, cirrus-sac; ed, ejaculatory duct; er, ridge around egg; gm, glandular mass around genital atrium; Lc, Laurer's canal; mr, median longitudinal ridge of ventral sucker; Mg, Mehlis' gland; mt, metraterm; oes, oesophagus; os, oral sucker; ov, ovary; ph, pharynx; pp, pars prostatica; pph, prepharynx; sr, seminal receptacle; sv, seminal vesicle; t, testis; ut, uterus; vf, vitelline follicle. Scale-bars: 1, 1mm; 2, 4, 100μm; 3, 200μm; 5, 20μm.

FIGURE 7. A in Additional shallow-water thecate hydroids (Cnidaria: Hydrozoa) from Guadeloupe and Les Saintes, French Lesser Antilles

FIGURE 7. A to G: Dentitheca dendritica (Nutting, 1900)—fragment of poly- (A) and monosiphonic (B) parts of stem; stem apophysis and origin of cladium (C); hydrothecae (D, E); hydrothecal rim in lateral (upper figure) and frontal (lower figure) views (F); lateral nematotheca with deep emargination on adaxial side, and three mesial nematothecae showing variation in shape of upper chamber (G). H and I: Plumularia margaretta (Nutting, 1900)—stem internode with cladium and hydrotheca (H); gonothecae (G). J to M: Plumularia setacea (Linnaeus, 1758)—portion of stem (J) and cladium (K); variability among ahydrothecate cladial internodes (L); gonotheca (M). N and O: Aglaophenia latecarinata Allman, 1877—hydrotheca in lateral (N) and frontal (O) views. Scale bars: 50 µm (F, G); 100 µm (C, H, L, N, O); 200 µm (D, E, I); 300 µm (K, M); 400 µm (B, J); 500 µm (A).

FIGURE 5. A in Additional shallow-water thecate hydroids (Cnidaria: Hydrozoa) from Guadeloupe and Les Saintes, French Lesser Antilles

FIGURE 5. A to G: Sertularella fraseri nom. nov.—erect stem (A); portion of stem with hydrothecae, side branch, and gonotheca (B); hydrothecae (C); gonothecae inserted on stem internodes (E, F); transverse section through gonotheca, showing four apical cusps (G). H to M: Sertularia tongensis (Stechow, 1919)—portion of stem showing internodes and hydrothecae (H); fragment of stem with side branch arising from within hydrothecae (I); hydrotheca; hydrothecal aperture in apical (left) and lateral (right) views, showing pleated opercular flaps (K); gonotheca typically springing from hydrotheca (L); cnidome (M). N to P: Hincksella cylindrica (Bale, 1888)—erect stem (N); two internodes with hydrothecae (O); nematocysts (P). Scale bars: 10 µm (M, P); 100 µm (D, K); 200 µm (J); 300 µm (C, E, F, G, L, O); 400 µm (H, I); 500 µm (B); 750 µm (N); 1 mm (A).

FIGURE 3. A in Additional shallow-water thecate hydroids (Cnidaria: Hydrozoa) from Guadeloupe and Les Saintes, French Lesser Antilles

FIGURE 3. A to J: Halecium calderi sp. nov.—various habits (A); portions of stem and branches (B–D); hydrothecae (E–G); gonothecae in frontal (H) and lateral (I) views; nematocysts (J). K and L: Halecium dyssymetrum Billard, 1929— fragment of stem (K); nematocysts (L). M to O: Halecium tenellum Hincks, 1861—portion of stem (M); hydrotheca (N); undischarged microbasic mastigophore from tentacle (O). P to S: Halecium sp.—erect stem (P); dichotomous branching of stem (Q); hydrotheca (R); nematocysts (S). Scale bars: 10 µm (J, L, O, S); 100 µm (N, R); 200 µm (G); 300 µm (M, Q); 400 µm (B, D, E, F, P); 500 µm (C, H, I, K); 1 cm (A).

FIGURE 4. A in Additional shallow-water thecate hydroids (Cnidaria: Hydrozoa) from Guadeloupe and Les Saintes, French Lesser Antilles

FIGURE 4. A to D: Hydrodendron sp.—erect stem (A); internode with hydro- and nematotheca (B); nematothecae (C); cnidome (D). E to G: Hebella venusta (Allman, 1877)—hydrothecae (E); gonothecae (F); undischarged microbasic mastigophore from tentacle (G). H and I: Filellum serratum (Clarke, 1879)—two hydrothecae, of which one (H) on Sertularia tongensis (Stechow, 1909). J and K: Diphasia tropica Nutting, 1904—basal part of stem with two pairs of hydrothecae (J); gonotheca (K). L to N—Sertularella diaphana (Allman, 1885), morphotype 1—portion of cladium with two hydrothecae (L); hydrothecal aperture view from above (M); undischarged microbasic mastigophore from tentacle (N). O to R: S. diaphana, morphotype 2—portion of cladium with two hydrothecae (O); gonotheca (P); transverse section through gonotheca (Q); cnidome (R). Scale bars: 10 µm (D, G, N, R); 50 µm (C); 100 µm (B, H, I, M); 200 µm (E); 300 µm (A, K, L, O, Q); 500 µm (F, J, P).

FIGURE 2. A in Additional shallow-water thecate hydroids (Cnidaria: Hydrozoa) from Guadeloupe and Les Saintes, French Lesser Antilles

FIGURE 2. A: Incertae sedis – four hydrothecae. B: Incertae sedis—hydrotheca atop its pedicel and gonotheca with two medusa buds. C to H: Clytia tottoni (Leloup, 1935)—colony habit (C); portion of stem with hydrothecae (D); hydrotheca (E); hydrothecal rim in apical and lateral views (F); shape of hydrothecal cusps (G); gonotheca (H). I: Obelia bidentata Clarke, 1875—hydrotheca. J and K: Obelia dichotoma (Linnaeus, 1758)—hydrotheca (J) and gonotheca (K). Scale bars: 50 µm (G); 100 µml (A); 200 µm (F, J); 300 µm (E, H, I, K); 400 µm (B); 1 mm (D); 1 cm (C).

FIGURE 1 in Additional shallow-water thecate hydroids (Cnidaria: Hydrozoa) from Guadeloupe and Les Saintes, French Lesser Antilles

FIGURE 1. Typical large, visually dominant hydroid species inhabiting the reefs of Guadeloupe. A: Colony of Nemalecium lighti (Hargitt, 1924) growing on sponge. B: Sertularella diaphana (Allman, 1885), morphotype 2—single, unbranched plumes growing upright through sand of seabed. C: S. diaphana, morphotype 1—large, fan-shaped colonies growing upside-down on black gorgonian attached to ceiling of submarine arch. D: Colonies of Thyroscyphus ramosus Allman, 1877 growing on sandy bottom. E: Colony of Halopteris carinata Allman, 1877 growing epizootically on sponge. F and G: Dentitheca dendritica (Nutting, 1900)—colony (F) and close-up (G) showing associated zoanthid polyps. H: Plumularia setacea (Linnaeus, 1758). I: Typical, easily recognizable, dark-pigmented colony of Macrorhynchia clarkei (Nutting, 1900). J: Large tuft of Macrorhynchia philippina Kirchenpauer, 1872 on hard substrate. K: Fertile cormoids of Aglaophenia rhychocarpa Allman, 1877. Photo courtesy of Jean-Michel Sutour (E, F, I, J), Anne Prouzet (B, C, D), Denis Ader (H, K), Vincent Maran (A), Alain Goyeau (G).

opennotspecifiedDec 2006View details →

FIGURES 1–2. Hypocreadium toombo n in Hypocreadium toombo n. sp. (Digenea: Lepocreadiidae) in the yellowspotted triggerfish Pseudobalistes fuscus (Perciformes: Balistidae) and additional lepocreadiids parasitizing fishes from the waters off New Caledonia

FIGURES 1–2. Hypocreadium toombo n. sp. 1. Ventral view of holotype, uterus in bold outline. 2. Terminal genitalia. Abbreviations: Ej, Ejaculatory duct; Ep, Excretory pore; Esv, External seminal vesicle; Isv, Internal seminal vesicle; Mt, Metraterm; Ov, Ovary; Pp, Pars prostatica; T, testis; Ut, Uterus. Scale bars: 1, 1 mm; 2, 200 μm.

opennotspecifiedDec 2017View details →

FIGURE 6 in Additional records of Elasmopus vachoni Mateus & Mateus, 1966 (Crustacea: Amphipoda: Maeridae) from European waters (Tarifa, southern Spain)

FIGURE 6. Geographical distribution of Elasmopus vachoni Mateus and Mateus, 1966 in the eastern Atlantic Ocean and western Mediterranean Sea (according to Mateus and Mateus, 1966; Ledoyer, 1967; Afonso, 1976; Cejas et al. 1983; Mateus and Mateus, 1985; Menioui and Ruffo, 1988; Izquierdo and Guerra-García, 2011). Blue star: São Tomé Island (sampling station of lost holotype), red star: Tarifa Island (sampling station of material herein examined).