Arkadiusz Nowak

Ecology, Botany

Ph.D.
23.80

Publications

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    Journal of Bryology 06/2015; 37(2):128-146. DOI:10.1179/1743282015Y.0000000003 · 1.23 Impact Factor
  • Journal of Bryology 04/2015; DOI:10.1179/1743282015Y.0000000014 · 1.23 Impact Factor
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    ABSTRACT: The paper presents new records for 18 vascular plant species from six Eurasian countries. Three taxa (Lepidium densiflorum, Stipa czerepanovii, Xanthium albinum) are reported from Kazakhstan, one (Ranunculus schmakovii) from Mongolia, three (Dianthus campestris, Ranunculus kauffmannii, Viola suavis) from Poland, five (Eragrostis amurensis, Linum catharticum, Ludwigia peploides subsp. stipulacea, Pyrethrum mikeschinii, Solidago canadensis) from Tajikistan, five (Clinopodium menthifolium, Juncus effusus, Mollugo cerviana, Poa sphondylodes, Vulpia myuros) from Russia, and one (Orobanche alba subsp. xanthostigma) from Georgia. Ten of the taxa presented (Clinopodium menthifolium, Dianthus campestris, Eragrostis amurensis, Juncus effusus, Lepidium densiflorum, Mollugo cerviana, Solidago canadensis, Viola suavis, Vulpia myuros and Xanthium albinum) are regarded as alien to the studied areas, whereas the remaining eight are native elements to the flora of the countries. For each species, synonyms, general distribution, habitat preferences, taxonomy with remarks on recognition and differentiation of the species from the most similar occurring in a given country, as well as a list of localities recorded (often far from the previously known areas), are presented.
    Acta botanica Gallica: bulletin de la Société botanique de France 04/2015; 162(2). DOI:10.1080/12538078.2015.1010105 · 0.24 Impact Factor
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    ABSTRACT: The paper presents new records for 18 vascular plant species from six Eurasian countries. Three taxa (Lepidium densiflorum, Stipa czerepanovii, Xanthium albinum) are reported from Kazakhstan, one (Ranunculus schmakovii) from Mongolia, three (Dianthus campestris, Ranunculus kauffmannii, Viola suavis) from Poland, five (Eragrostis amurensis, Linum catharticum, Ludwigia peploides subsp. stipulacea, Pyrethrum mikeschinii, Solidago canadensis) from Tajikistan, five (Clinopodium menthifolium, Juncus effusus, Mollugo cerviana, Poa sphondylodes, Vulpia myuros) from Russia, and one (Orobanche alba subsp. xanthostigma) from Georgia. Ten of the taxa presented (Clinopodium menthifolium, Dianthus campestris, Eragrostis amurensis, Juncus effusus, Lepidium densiflorum, Mollugo cerviana, Solidago canadensis, Viola suavis, Vulpia myuros and Xanthium albinum) are regarded as alien to the studied areas, whereas the remaining eight are native elements to the flora of the countries. For each species, synonyms, general distribution, habitat preferences, taxonomy with remarks on recognition and differentiation of the species from the most similar occurring in a given country, as well as a list of localities recorded (often far from the previously known areas), are presented.
    Acta botanica Gallica: bulletin de la Société botanique de France 04/2015; 162(2). · 0.24 Impact Factor
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    Journal of Bryology 03/2015; 37(1):68-79. · 1.23 Impact Factor
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    Marcin Nobis, Arkadiusz Nowak, Polina D. Gudkova
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    ABSTRACT: Stipa section Regelia comprises three species occurring in mountainous areas of Central Asia. One of them, S. smithii, was described by Martinovský in 1970, but the taxon has been overlooked in later taxonomical studies. The species was described with two varieties, var. smithii and var. macrocarpa. As a result of our taxonomical studies, we find the typical variety of the taxon to be conspecific with Stipa aliena, and propose that the second one be recognized as Stipa aliena var. macrocarpa comb. nov. Remarks on species belonging to section Regelia and micromorphological patterns of their lemma morphologies are discussed. A key to species close to S. aliena is provided.
    Phytotaxa 01/2015; 195(3):236-242. DOI:10.11646/phytotaxa.195.3.3 · 1.38 Impact Factor
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    ABSTRACT: The floristic structure, distribution and habitat requirements of a forest syntaxon, Populetum pamiricae ass. nova is described. The potential range of the Populetum pamiricae association comprises the mountains of eastern Tajikistan (Pamir Alai Mts), Kashgaria in western China (Kunlun Shan Mts) and north-eastern Afghanistan (Hindu Kush Mts) in Middle Asia. The biotope of this community comprises of high mountain river valleys situated at elevations between 2,500 and 3,200 m above sea level. Phytocoenoses of the Populetum pamiricae association are characterized by the apparent domination in the tree layer of a diagnostic species, Populus pamirica. The tree stand has a mean cover around 55%. The layer of shrubs consists primarily of the willow including Salix linearifolia and S. wilhelmsiana, and Hippophaë rhamnoides, Rosa huntica and Lonicera stenantha. The herb layer is less developed and consists of species typical for Populetea laurifolio-suaveolentis; however, in juvenile stages of the community, taxa from riverbed vegetation (i.e. Salicion eleagni) also frequently occur. Populetum pamiricae grows in areas of flood inundations caused mainly by spring thaw where the humus layer in soils is very thin or even completely absent. The forest association of Populetum pamiricae ass. nova is one of the rarest and most rapidly disappearing wood communities in Tajikistan. High conservation priority and special management is recomended for this association.
    01/2015; 10(1). DOI:10.1515/biol-2015-0009
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    ABSTRACT: Arbuscular mycorrhiza and fungal root endophytes of three weeds, Galium tricornutum, Lycopsis orientalis and Scandix pecten-veneris, were studied in an altitudinal gradient of the Pamir Alai Mountains. Colonisation by arbuscular mycorrhizal fungi (AMF) was found in all species. Only in the case of G. tricornutum was there a rise in mycorrhizal parameters values found for the medium altitude range. Similar tendencies were observed in the case of the AMF colonisation potential assessment. This suggests that plant species' identity, dependency on symbiosis and interactions with soil properties determine root colonisation and the abundance of AMF in soils at the elevations in question. Four AMF species, Claroideoglomus claroideum, Funneliformis mosseae, Scutellospora dipurpurescens and Septoglomus constrictum, were isolated from trap cultures established on soil taken from under the weeds. Dark septate endophytes (DSE) accompanied the AMF in the roots of G. tricornutum and S. pecten-veneris; however, they were neither frequently occurring nor abundant. The sporangia of Olpidium spp. were observed with low frequency occurrence in G. tricornutum and S. pecten-veneris and more often in the roots of L. orientalis. However, in both cases, they were low in abundance. No differences were found for the presence of DSE and Olpidium in the altitudinal gradient.
    Plant Biosystems 12/2014; DOI:10.1080/11263504.2014.990944 · 1.91 Impact Factor
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    Journal of Bryology 11/2014; 36(4):306-324. DOI:10.1179/1743282014Y.0000000123 · 1.23 Impact Factor
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    ABSTRACT: Road traffic emits a cocktail of pollutants that can influence the vegetation and plant diversity in neighboring areas. However, the recovery potential of bryophytes after traffic abandonment is still little explored. In addition, the effects of the main pollutants of road verges, such as metals and salinity, on moss flora need to be investigated. In our study, we compared the moss richness and diversity in two closely related veteran tree allees of high conservation importance. The allees in Gryżów and Lubrza, Poland, were chosen because of their similarity in age, geographical location, type of surrounding areas, and tree species. The only difference was that the trees in Gryżów had not been exposed to direct road pollution for almost 30 years. The moss richness and diversity differed significantly between the sites. Altogether, 20 moss species were recorded on 229 trees, 17 species in Gryżów (abandoned road), and 13 in Lubrza (busy road). We found considerable differences between moss cover on the road-facing and opposite sides of tree trunks. In Lubrza, mosses on the road-facing side were very scarce. The moss cover in Gryżów was highly balanced between trunk sides as well as among trunk heights. Typical epiphytic species such as Bryum moravicum, Dicranoweisia cirrata, Leskea polycarpa, and Orthodicranum tauricum preferred the Gryżów tree stands, where they were present in numbers almost twice as high as that at Lubrza. The study shows that constructing a bypass road could be an effective conservation measure for veteran tree protection with their epiphytic moss flora.
    Environmental Monitoring and Assessment 09/2014; 186(12). DOI:10.1007/s10661-014-4056-3 · 1.68 Impact Factor
  • Plant Biosystems 09/2014; DOI:10.1080/11263504.2013.851127 · 1.91 Impact Factor
  • A Nowak, S Nowak, M Nobis, A Nobis
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    ABSTRACT: Intensification of agriculture has significantly diminished the populations of segetal weeds worldwide in recent decades. Remarkable changes to the entire flora and vegetation of man-made habitats are being observed in agroecosystems. The present study analyses, for the first time, the threat status of segetal weeds in Tajikistan. A group of 871 weed species were evaluated against IUCN criteria. The assessment of threat status revealed that 214 weed taxa have to be regarded as threatened in Tajikistan, including 18 endemic and four subendemic plants. Five species have been classified as extinct, 27 as critically endangered, 27 as endangered, 39 as vulnerable, 34 as near threatened and 44 as in the ‘least concern’ category. For 38 species, the threat level was not possible, due to lack of data. The most threatened group of taxa is related to rice paddy fields. Numerous losses and disappearances were also observed in cereal communities. Percentages of threatened species in different chorological groups amounted to 58% in the Irano–Turanian, 17% in the Pluriregional, 11% in the Mediterranean, 9.5% in the Cosmopolitan and 4% in the Euro–Siberian species group. Assessment of the threatened status of the rich segetal flora of Tajikistan affords the opportunity to raise awareness of the value of this group of species in the country and may be useful in the conservation management of arable habitats. The results show that even though agriculture in Tajikistan is still based on traditional management and manual work, weed control causes a serious threat to its segetal flora.
    Weed Research 09/2014; 54(6). DOI:10.1111/wre.12103 · 2.02 Impact Factor
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    ABSTRACT: Stipa klimesii sp. nov. from the Western Himalayas (India: Ladakh) and its variety S. klimesii var. pubescens var. nov. are described. The new species is similar to S. roborowskyi but differs by its longer anthecium, longer ligules of vegetative shoots, longer hairs on seta and shorter awns. Stipa klimesii is also similar to S. purpurea, but differs by longer ligules of vegetative shoots, shorter awns, slightly shorter hairs on seta and by the character of the panicle, which is compressed and with straight branches in S. klimesii vs. lax and with flexuous branches in S. purpurea. Epidermal patterns of the lemma in S. klimesii and both above-mentioned species, were examined by scanning electron microscopy. Images of macromorphological and micromorphological structures are provided.
    Phytotaxa 07/2014; 174(3):173-180. DOI:10.11646/phytotaxa.174.3.6 · 1.38 Impact Factor
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    Arkadiusz Sebastian Nowak, Marcin Nobis, Sylwia Nowak, Agnieszka Nobis
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    ABSTRACT: Dionysia involucrata Zaprjag. (Primulaceae) is known as critically endangered endemic species of Hissar Mountains in Tajikistan. It is reported from few localities mainly in Varzob River valley and its tributaries. The species inhabits steep or overhanging faces of granite rocks in narrow river gorges. During the research all known populations of D. involucrata were examined in respect of the habitat conditions and species composition of vegetation plots. We analyzed the population extent of the species in its range in Tajikistan and the main threats in order to assess its conservation status. The detrended correspondence analysis was performed on a matrix of 65 relevés and 49 species (vascular plants and mosses), to classify the phytocoenosis with domination of D. involucrata according to their floristic composition in relation to other petrophytic vegetation units. Using our field data regarding present extent of occurrence and area of occupancy we conclude that the threat category of D. involucrata should be reassessed from critically endangered to endangered. The species shows decline tendency in extent of occurrence, area of occupancy as well as in number of locations. The vegetation plots with domination of D. involucrata have relatively high level of separateness due to different species composition. We define the new association – Dionysietum involucratae – representing chasmophytic vegetation of submontane and montane zone in Middle Asia (ca. 1000–1600 m a.s.l.). The plots of Dionysietum involucratae were found mainly on granite rocks, on very steep or overhanging faces, on southwestern or southern exposition. The association is rather poor in species with inconsiderable contribution of mosses. Despite the diagnostic species, Campanula incanescens, Carex koshewnikowii and Scutellaria hissarica were the most abundant and frequent taxa within the researched patches of vegetation.
    Acta Societatis Botanicorum Poloniae 07/2014; 83(2):123-135. DOI:10.5586/asbp.2014.010 · 1.20 Impact Factor
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    A. Nowak, S. Nowak, M. Nobis, A. Nobis
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    ABSTRACT: The paper presents the results of phytosociological research conducted on the vegetation of rock habitats in the montane and colline zones of the Pamir-Alai Mountains (Tajikistan). During field surveys done in 2010–2013, 122 phytosociological relevés were sampled. Plant species were recorded according to the Braun-Blanquet cover-abundance scale. The vegetation studies were carried out generally in the western Pamir-Alai and south-western Tian Shan Mts, especially in the Zeravshan, Hissar, Hazratishoh, Darvaz, Rushan, Turkestan, Kuramin and Vanch ranges. A synopsis of the rock communities of the montane and colline zones in Tajikistan is proposed. The collected material presents most of the variability among the plant communities of rock crevices and fissures on calcareous as well as acidic substrates in the montane and colline zones in Tajikistan. As a result of field research and numerical analyses, eight associations have been distinguished: Scutellarietum hissaricae, Scutellarietum schugnanicae, Scutellarietum zaprjagaevii, Scutellarietum baldshuanicae, Tylospermetum lignosae, Dionysietum involucratae A. Nowak, M. Nobis, S. Nowak & A. Nobis, 2014, Nanorrhinetum ramosissimi, Campanuletum albertii and the community of Scutellaria adenostegia within new alliance – Caricion koshevnikovii. The main factors determining the species composition of classified associations seem to be the geography of the distribution range, elevation above sea level, rock type and exposition.
    Plant Biosystems 06/2014; 148(6):1199-1210. DOI:10.1080/11263504.2014.941035 · 1.91 Impact Factor
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    Journal of Bryology 06/2014; 36(2):134-135. DOI:10.1179/1743282014Y.0000000100 · 1.23 Impact Factor
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    ABSTRACT: alpestris (Thed.) Schimp. Contributor: L. Thouvenot Andorra: Encamp, Ensagents, 42u319070N, 1u389410E, 2520 m a.s.l., on the top of granitic rock in alpine meadow, 17 July 2006, leg. L. Thouvenot 3086 (BCB 58238). According to Casas (2005) this species was pre-viously unrecorded in Andorra (Eastern Pyrenees) although it is known in the neighbouring countries of France (Cerdagne) (Aicardi, 2007) and Spain (Pallars Sobirà, Baixa Cerdanya) (Cros & Sérgio, 2007). 2. Andreaea australis Mitt. Contributor: H. Bednarek-Ochyra South Georgia: (1) Barff Peninsula, Lö nnberg Valley, ca 100 m (5300 ft) a.s.l., north-east facing rock ledge, GR 147112, 2 February 1964, leg. R. E. Longton 390 (KRAM); (2) approximately 1 mile east of The Crutch, ca 85 m (5250 ft) a.s.l., crevices of north facing rocks above scree, GR 132135, 14 December 1967, leg. S. W. Greene CG 550 (KRAM). Andreaea Hedw. is well represented on South Georgia, and Greene (1968) recognised nine species on this subantarctic island. As a result of subsequent studies, three more species have been added to the island's bryoflora, A. obovata Thed. (Ochyra et al., 2002), A. mutabilis Hook.f. & Wilson (Blockeel et al., 2003) and A. nitida Hook.f. & Wilson (Ellis et al., 2011b). Murray (2006) indicated that one more species, A. australis Mitt., occurs on South Georgia but did not cite any specimens. This species was indeed collected several times on that island and here two specimens are cited to substantiate this. Prior to this discovery A. australis was considered to be an
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    ABSTRACT: The paper presents new records for 20 vascular plant species from eight Asian and two European countries. Five taxa (Artemisia campestris, Artemisia tanacetifolia, Delphinium sajanense, Diarthron vasiculosum var. undulatum, Epilobium adenocaulon) are reported from Kazakhstan, four (Deyeuxia yanyuanensis, Poa arnoldii, Stipa gracilis, Stipa macroglossa subsp. kazachstanica) from China, three (Nepeta pamirensis, Silene bucharica, Scrophularia pamiro-alaica) from Uzbekistan, two (Epilobium nervosum, Stellaria zolotukhinii) from Mongolia, two (Oenothera deflexa, Scirpus georgianus) from Poland, one (Coronopus didymus) from Tajikistan, one (Orobanche rumseiana) from Italy, one (Stipa macroglossa subsp. kazachstanica) from Kyrgyzstan, one (Poa polozhiae) from Russia, and one (Agrostis rupestris) from Azerbaijan. All of these taxa are new to the floras of listed Asian and European countries or its regions (as it is in the case of China or Russia). Four of the presented taxa (Coronopus didymus, Epilobium adenocaulon, Oenothera deflexa and Scirpus georgianus) are regarded as alien to the studied areas, whereas the other 16 are new native elements to the flora of the countries. For each species synonyms, general distribution, habitat preferences, taxonomy with remarks on recognition and differentiation of the species from the most similar occurring in a given country, as well as a list of localities recorded (often far from the previously known areas) are presented. In the case of Orobanche rumseiana, a new variety O. rumseiana var. sarda R. Piwowarczyk and A. Pujadas is described and illustrated.
    Acta botanica Gallica: bulletin de la Société botanique de France 04/2014; 161(2). DOI:10.1080/12538078.2014.921643 · 0.24 Impact Factor
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    ABSTRACT: The paper presents results of phytosociological researches on rock faces vegetation of Pamir Alai Mountains. In total, 182 phytosociological relevés were made during the field studies conducted in 2006–2012, applaying the Braun-Blanquet method. Plant communities of calcareous firm rock faces and small fissures, inhabiting mainly the alpine and subnival zone in several ranges (e.g. Zeravshan Mts, Hissar Mts, Hazratishoh Mts, Darvaz Mts, Rushan Mts and Vanch Mts) are herein described for the first time. A hierarchical syntaxonomic synopsis of the rock communities of the Pamir Alai is provided. The collected vegetation samples represent the majority of the variability among the phytocoenoses of small crevices in limestone massifs in alpine and subnival zone. As a result of field research and numerical analyses, 14 associations have been distinguished: Sergietum regelii, Scutellarietum megalodontae, Scutellarietum rubromaculatae, Scutellarietum orbicularis, Campanuletum lehmannianae, Violetum majchurensis, Achoriphragmetum darvazici, Achoriphragmetum turkestanici, Asperuletum fedtschenkoi, Andrachnetum fedtschenkoi, Eritrichietum turkestanici, Minuartio litwinowii-Phaeonychietum surculosi, Silenetum kuhistanicae, Silenetum samarcandensis. Main factors determining the species composition of the classified associations seem to be the crevice type, the elevation above sea level and the availability of soil. Rocky habitats in Tajikistan, probably because of their high separateness and marginal position within the Irano-Turanian province, act as a refuge for many narrowly distributed plant taxa.
    Phytocoenologia 02/2014; 44(1-2):81-101. DOI:10.1127/0340-269X/2014/0044-0573. · 0.39 Impact Factor

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