Saxifragaceae of the Canadian Arctic Archipelago: a contribution to a DELTA database for interactive identification and illustrated information retrieval

1998 ◽  
Vol 76 (12) ◽  
pp. 2020-2036 ◽  
Author(s):  
Susan G Aiken ◽  
Michael J Dallwitz ◽  
Cheryl L McJannet ◽  
Lynn J Gillespie ◽  
Laurie L Consaul
Keyword(s):  
Information Retrieval ◽  
Habitat Preferences ◽  
Canadian Arctic ◽  
Morphological Characters ◽  
Canadian Arctic Archipelago ◽  
Environmental Indicator ◽  
Line Drawings ◽  
Additional Information ◽  
The Family ◽  
Annotated Checklist

A re-assessment of members of the family Saxifragaceae in the Canadian Arctic Archipelago is presented as a traditional key and annotated checklist that recognizes 17 taxa. The information on which this paper is based is recorded in a developing DELTA database that aims to collect the following data: place of valid publication; synonymy, usually limited to names that have been associated with the Canadian Arctic; common name(s), if applicable; vegetative and floral morphological characters; data on the distribution, including information about the northernmost record of the taxon; habitat preferences of each species; notes on the species as an environmental indicator; indigenous knowledge; and expanded notes conveying additional information. The database also contains maps, illustrations of characters useful for identification, and colour photographs and line drawings of the taxa. Appendices list characters recorded in the database, brief taxonomic notes, and a sample species description. The data are available on the Internet at http://biodiversity.uno.edu/delta/ as natural-language descriptions and as an INTKEY interactive identification and information-retrieval package for Windows.Key words: Arctic, Canada, DELTA, Internet, Saxifragaceae, taxonomy.

Grasses of the Canadian Arctic Archipelago: a DELTA database for interactive identification and illustrated information retrieval

1996 ◽  
Vol 74 (11) ◽  
pp. 1812-1825 ◽  
Author(s):  
S. G. Aiken ◽  
L. L. Consaul ◽  
M. J. Dallwitz
Keyword(s):  
Information Retrieval ◽  
Canadian Arctic ◽  
Morphological Characters ◽  
Environmental Indicators ◽  
Herbarium Specimens ◽  
Canadian Arctic Archipelago ◽  
Type Specimens ◽  
Line Drawings ◽  
Additional Information ◽  
Annotated Checklist

A comprehensive re-assessment of grasses in the Canadian Arctic Archipelago is presented as an annotated checklist recognizing 49 taxa. Twenty-five names that have been associated with the flora of the islands are excluded. Information was recorded in a DELTA database. For taxa recognized, the following information is included: common name if applicable, place of valid publication, basionyms, limited synonymy, location of type specimens when known and whether we have seen them, 39 vegetative and 60 floral morphological characters, known chromosome number(s), distribution and habitat data, comments in an annotated checklist, and for many taxa, expanded notes conveying additional information. For 37 of the taxa, their usefulness as environmental indicators is recorded. The above information is also available for some of the excluded taxa; for all of them there are notes explaining why the taxon is excluded. The database is illustrated with 46 maps, 17 line drawings of characters useful for identifications, and photographs of 29 type specimens, 19 herbarium specimens, and 58 photographs of plants in their habitats or close up. The data are available as an INTKEY interactive identification and information-retrieval package for MS-Windows, and as natural-language descriptions in four formats: WWW pages, plain text, PostScript, and HP Laserjet files. Keywords: Poaceae, arctic, taxonomy, WWW, Internet, key.

Saxifragaceae of the Canadian Arctic Archipelago: a contribution to a DELTA database for interactive identification and illustrated information retrieval

1998 ◽  
Vol 76 (12) ◽  
pp. 2020-2036 ◽  
Author(s):  
Susan G. Aiken ◽  
Michael J. Dallwitz ◽  
Cheryl L. McJannet ◽  
Lynn J. Gillespie ◽  
Laurie L. Consaul
Keyword(s):  
Information Retrieval ◽  
Canadian Arctic ◽  
Canadian Arctic Archipelago

scholarly journals Spring melt pond fraction in the Canadian Arctic Archipelago predicted from RADARSAT-2

2020 ◽  
Vol 14 (12) ◽  
pp. 4675-4686
Author(s):  
Stephen E. L. Howell ◽  
Randall K. Scharien ◽  
Jack Landy ◽  
Mike Brady
Keyword(s):  
Sea Ice ◽  
Canadian Arctic ◽  
Arctic Sea Ice ◽  
Canadian Arctic Archipelago ◽  
Predictive Information ◽  
Narrow Channels ◽  
Model Simulations ◽  
Additional Information ◽  
Melt Pond ◽  
Stage Of Development

Abstract. Melt ponds form on the surface of Arctic sea ice during spring, influencing how much solar radiation is absorbed into the sea ice–ocean system, which in turn impacts the ablation of sea ice during the melt season. Accordingly, melt pond fraction (fp) has been shown to be a useful predictor of sea ice area during the summer months. Sea ice dynamic and thermodynamic processes operating within the narrow channels and inlets of the Canadian Arctic Archipelago (CAA) during the summer months are difficult for model simulations to accurately resolve. Additional information on fp variability in advance of the melt season within the CAA could help constrain model simulations and/or provide useful information in advance of the shipping season. Here, we use RADARSAT-2 imagery to predict and analyze peak melt pond fraction (fpk) and evaluate its utility to provide predictive information with respect to sea ice area during the melt season within the CAA from 2009–2018. The temporal variability of RADARSAT-2 fpk over the 10-year record was found to be strongly linked to the variability of mean April multi-year ice area with a statistically significant detrended correlation (R) of R=-0.89. The spatial distribution of RADARSAT-2 fpk was found to be in excellent agreement with the sea ice stage of development prior to the melt season. RADARSAT-2 fpk values were in good agreement with fpk observed from in situ observations but were found to be ∼ 0.05 larger compared to MODIS fpk observations. Dynamically stable sea ice regions within the CAA exhibited higher detrended correlations between RADARSAT-2 fpk and summer sea ice area. Our results show that RADARSAT-2 fpk can be used to provide predictive information about summer sea ice area for a key shipping region of the Northwest Passage.

scholarly journals Annotated checklist for the Gorgonocephalidae family (Echinodermata: Ophiuroidea) from the National Echinoderm Collection “Dra. Ma. E. Caso M.” of the Instituto de Ciencias del Mar y Limnología, UNAM

2021 ◽  
Vol 69 (Suppl.1) ◽  
pp. 287-303
Author(s):  
Frida-Jacqueline Ramírez-Moreno ◽  
Francisco-Alonso Solís-Marín ◽  
Alfredo Laguarda-Figueras
Keyword(s):  
Species Richness ◽  
Taxonomic Status ◽  
Morphological Characters ◽  
Accurate Identification ◽  
Dorsal Aspect ◽  
The Family ◽  
Annotated Checklist ◽  
Scanning Electron

Introduction: The order Euryalida is represented by fragile ophiuroids with long and slender arms that can be ramified. Species within the family Gorgonocephalidae are characterized by the presence of tiny hooklets on the dorsal aspect of their arms. There are very few published studies referring to species of the family Gorgonocephalidae inhabiting Mexican waters. Objective: To review the taxonomic status of the species belonging to this taxonomic family, identifying their diagnostic taxonomic characteristics to create an illustrated guide of species kept at the CNE, UNAM. Methods: Specialized bibliography of the Gorgonocephalidae family was gathered. Subsequently, all the specimens from the CNE were photographed using Scanning Electron and Multifocal Microscopy photography, to show the structures of taxonomic relevance. Results: A total of 193 specimens corresponding to eight genera and nine species were reviewed. The genus Astrocaneum presented the highest species richness. Conclusions: For the species identified in this study and for the sake of accurate identification, morphological characters such as the shape of hooklets and arm plates were highlighted.  

scholarly journals A Synopsis of the Genus Stipa (Poaceae) in Middle Asia, Including a Key to Species Identification, an Annotated Checklist, and Phytogeographic Analyses

2020 ◽  
Vol 105 (1) ◽  
pp. 1-63 ◽  
Author(s):  
Marcin Nobis ◽  
Polina D. Gudkova ◽  
Arkadiusz Nowak ◽  
Jakub Sawicki ◽  
Agnieszka Nobis
Keyword(s):  
Habitat Preferences ◽  
Hybrid Origin ◽  
Mountain Range ◽  
Distribution Maps ◽  
Middle Asia ◽  
The Family ◽  
Taxonomic Studies ◽  
Annotated Checklist ◽  
Warm Temperate ◽  
Unpublished Information

The genus Stipa L. comprises over 150 species, all native to the Old World, where they grow in warm temperate regions throughout Europe, Asia, and North Africa. It is one of the largest genera in the family Poaceae in Middle Asia, where one of its diversity hotspots is located. However, identification of Middle Asian Stipa species is difficult because of the lack of new, comprehensive taxonomic studies including all of the species recorded in the region. We present a critical review of the Mid-Asian representatives of Stipa, together with an identification key and taxonomic listing. We relied on both published and unpublished information for the taxa involved, many of which are poorly known. For each taxon, we present a taxonomic and nomenclatural overview, habitat preferences, distribution, altitudinal range, and additional notes as deemed appropriate. We describe four new nothospecies: S. ×balkanabatica M. Nobis & P. D. Gudkova, S. ×dzungarica M. Nobis, S. ×pseudomacroglossa M. Nobis, S. ×subdrobovii M. Nobis & A. Nowak, one subspecies S. caucasica Schmalh. subsp. nikolai M. Nobis, A. Nobis & A. Nowak, and eight varieties: S. araxensis Grossh. var. mikojanovica M. Nobis, S. caucasica var. fanica M. Nobis, P. D. Gudkova & A. Nowak, S. drobovii (Tzvelev) Czerep. var. jarmica M. Nobis, S. drobovii var. persicorum M. Nobis, S. glareosa P. A. Smirn. var. nemegetica M. Nobis, S. kirghisorum P. A. Smirn. var. balkhashensis M. Nobis & P. D. Gudkova, S. richteriana Kar. & Kir. var. hirtifolia M. Nobis & A. Nowak, and S. ×subdrobovii var. pubescens M. Nobis & A. Nowak. Additionally, 12 new combinations, Achnatherum haussknechtii (Boiss.) M. Nobis, A. mandavillei (Freitag) M. Nobis, A. parviflorum (Desf.) M. Nobis, Neotrinia chitralensis (Bor) M. Nobis, S. badachschanica Roshev. var. pamirica (Roshev.) M. Nobis, S. borysthenica Klokov ex Prokudin var. anomala (P. A. Smirn.) M. Nobis, S. holosericea Trin. var. transcaucasica (Grossh.) M. Nobis, S. kirghisorum P. A. Smirn. var. ikonnikovii (Tzvelev) M. Nobis, S. macroglossa P. A. Smirn. var. kazachstanica (Kotuchov) M. Nobis, S. macroglossa var. kungeica (Golosk.) M. Nobis, S. richteriana var. jagnobica (Ovcz. & Czukav.) M. Nobis & A. Nowak, and S. zalesskii Wilensky var. turcomanica (P. A. Smirn.) M. Nobis are proposed, and the lectotypes for 14 taxa (S. arabica Trin. & Rupr., S. bungeana Trin. ex Bunge, S. caspia K. Koch, S. ×consanguinea Trin. & Rupr., S. effusa Mez, S. ×heptapotamica Golosk., S. jacquemontii Jaub. & Spach., S. kungeica Golosk., S. margelanica P. A. Smirn., S. richteriana, S. rubentiformis P. A. Smirn., S. sareptana A. K. Becker, S. tibetica Mez, and Timouria saposhnikovii Roshev.) are designated. In Middle Asia the genus Stipa comprises 98 taxa, including 72 species, four subspecies, and 22 varieties. Of the 72 species of feather grasses, 23 are of hybrid origin (nothospecies). In Middle Asia, feather grasses can be found at elevations from (0 to)300 to 4500(to 5000) m, but most are montane species. The greatest species richness is observed at altitudes between 1000 and 2500 m. Nineteen species grow above 3000 m, but only nine above 4000 m. The number of taxa (species and subspecies) growing in each country also varies considerably, with the highest noted in Kazakhstan (42), Tajikistan (40), and Kyrgyzstan (35). Of the 76 taxa of Stipa (species and subspecies) recorded in Middle Asia, 41 are confined to the region, with some being known only from a single country or mountain range. Distribution maps of selected species are provided.

scholarly journals Vascular plant biodiversity of Dorset and Mallik islands, Nunavut, Canada: an annotated checklist of a middle Arctic flora in the Canadian Arctic Archipelago

Phytotaxa ◽  
2020 ◽  
Vol 471 (3) ◽  
pp. 147-192
Author(s):  
JEFFERY M. SAARELA ◽  
PAUL C. SOKOLOFF ◽  
ROGER D. BULL
Keyword(s):  
Plant Diversity ◽  
Environmental Changes ◽  
Vascular Plant ◽  
Canadian Arctic ◽  
The Arctic ◽  
Canadian Arctic Archipelago ◽  
Vascular Plant Diversity ◽  
Diapensia Lapponica ◽  
Circumpolar Arctic ◽  
Annotated Checklist

Establishing a baseline of current Arctic vascular plant diversity and distribution is critical, given the rapid and major environmental changes occurring in the Arctic ecozone in response to climate change. Here, we report the results of a floristic study of vascular plant diversity of Dorset and Mallik islands in the Canadian Arctic Archipelago, Nunavut, Canada. These two small islands lie off the coast of the Foxe Peninsula of southwestern Baffin Island, and they are part of the Circumpolar Arctic bioclimate Subzone C. The hamlet of Kinngait (formerly Cape Dorset) is located on Dorset Island, and Nunavut’s Mallikjuak Territorial Park encompasses all of Mallik Island. The study is based on a specimen-based dataset comprising 876 unique collections from the two islands gathered over the last century, including 268 new ones collected in 2015. Results are presented in an annotated checklist. The vascular plant flora of the study area comprises 26 families, 71 genera, 150 species and three infraspecific taxa; 139 species are recorded on Dorset Island and 102 on Mallik Island. Eleven taxa are newly recorded from the study area in six families: Carex rupestris, Eriophorum scheuchzeri subsp. scheuchzeri, E. triste (Cyperaceae); Diapensia lapponica (Diapensiaceae); Equisetum arvense subsp. alpestre (Equisetaceae); Oxytropis deflexa var. foliolosa (Fabaceae); Potentilla arenosa subsp. arenosa, P. hyparctica subsp. hyparctica (Rosaceae); Antennaria friesiana subsp. friesiana, Askellia pygmaea, and Taraxacum phymatocarpum (Asteraceae).

A multi-gene molecular phylogeny regarding the two phylogenetically close genera Hydropus and Leucoinocybe (Agaricales, Basidiomycota), new for Turkey

Nova Hedwigia ◽  
2020 ◽  
Vol 111 (3) ◽  
pp. 429-448
Author(s):  
Oğuzhan Kaygusuz ◽  
Hana Ševčíková ◽  
Eliseo Battistin ◽  
Brahim Türkekul
Keyword(s):  
New Records ◽  
Taxonomic Status ◽  
Morphological Characters ◽  
Data Sets ◽  
New Genera ◽  
New Host ◽  
Natural Classification ◽  
Future Studies ◽  
Line Drawings ◽  
The Family

The taxonomy and phylogeny of Hydropus subalpinus and Leucoinocybe lenta were investigated on the basis of morphological features and multi-gene molecular analysis (nrITS, nrLSU, tef-1α data sets) in order to elucidate the taxonomic status of these two rare species, and delineate a natural classification within the family Porotheleaceae. The results reinforced the conclusion that Hydropus and Leucoinocybe represent independent genera separate from Clitocybula, Gerronema , Lignomphalia, Megacollybia, Porotheleum and Trogia. The genus Leucoinocybe in the analysis proves to be a monophyletic group, while the genus Hydropus is polyphyletic. In addition, this is the first report of Leucoinocybe lenta growing in forests of the relict endemic Liquidambar orientalis and Fagus orientalis is recorded as a new host for Hydropus subalpinus. The study describes Hydropus subalpinus and Leucoinocybe lenta as new records and Hydropus and Leucoinocybe as new genera records for Turkish mycobiota. Detailed description of the morphological characters, line drawings of salient micromorphological features and color photographs of these species are provided, and comparisons with phenetically similar and phylogenetically related species are presented. This survey provides hopefully useful information for future studies on the phylogeny and diversity of Hydropus and Leucoinocybe, and reveals the need for more molecular studies on collections of the Hydropoid clade.

scholarly journals Tegenaria hasperi Chyzer, 1897 and Zoropsis spinimana (Dufour, 1820), newly recorded synanthropic spiders from Slovakia (Araneae, Agelenidae, Zoropsidae)

Check List ◽  
2021 ◽  
Vol 17 (3) ◽  
pp. 775-782
Author(s):  
Pavol Purgat ◽  
Natália Ondrejková ◽  
Zuzana Krumpálová ◽  
Peter Gajdoš ◽  
Natália Hurajtová
Keyword(s):  
Digital Images ◽  
Habitat Preferences ◽  
Morphological Characteristics ◽  
First Record ◽  
Additional Information ◽  
The Family ◽  
First Time ◽  
Family House

Tegenaria hasperi Chyzer, 1897 (Agelenidae) and Zoropsis spinimana (Dufour, 1820) (Zoropsidae) are recorded in Slovakia for the first time. Both species were collected in synanthropic habitats in Western Slovakia. Two males of T. hasperi were collected in the garden of a family house, and both sexes of Z. spinimana were recorded from the interiors and exteriors of buildings in four separate cities, representing the first record of the family Zoropsidae in Slovakia. This contribution provides additional information on the morphological characteristics of these species. Digital images of their habitus and copulatory organs, as well as their distribution and habitat preferences are included. 

scholarly journals Spring melt pond fraction in the Canadian Arctic Archipelago predicted from RADARSAT-2

2020 ◽  
Author(s):  
Stephen Edward Lee Howell ◽  
Randall Kenneth Scharien ◽  
Jack Landy ◽  
Mike Brady
Keyword(s):  
Sea Ice ◽  
Canadian Arctic ◽  
Arctic Sea Ice ◽  
Canadian Arctic Archipelago ◽  
Predictive Information ◽  
Narrow Channels ◽  
Model Simulations ◽  
Additional Information ◽  
Melt Pond ◽  
Stage Of Development

Abstract. Melt ponds form on the surface of Arctic sea ice during spring, influencing how much solar radiation is absorbed into the sea ice-ocean system, which in turn impacts the ablation of sea ice during the melt season. Accordingly, melt pond fraction (fp) has been shown to be a useful predictor of sea ice area during the summer months. Sea ice dynamic and thermodynamic processes operating within the narrow channels and inlets of the Canadian Arctic Archipelago (CAA) during the summer months are difficult for model simulations to accurately resolve. Additional information on fp variability in advance of the melt season within the CAA could help constrain model simulations and/or provide useful information in advance of the shipping season. Here, we use RADARSAT-2 imagery to predict and analyze peak spring fp and evaluate its utility to provide predictive information with respect to sea ice area during the melt season within the CAA from 2009–2018. The temporal variability of RADARSAT-2 fp over the 10-year record was found to be strongly linked to the variability of mean April multi-year ice area and the spatial distribution of RADARSAT-2 fp was found to be in excellent agreement with the sea ice stage of development prior to the melt season. RADARSAT-2 fp values were in good agreement with the peak fp observed from in situ observations but were found to be ∼0.05 larger compared to peak MODIS fp observations. Statistically significant detrended correlations between RADARSAT-2 fp and summer sea ice area were found for several regions within the CAA. Our results show that RADARSAT-2 fp can be used to provide predictive information about summer sea ice area for a key shipping region of the Northwest Passage.

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