scholarly journals Spring weed communities of rice agrocoenoses in central Nepal

2016 ◽  
Vol 75 (1) ◽  
pp. 99-108 ◽  
Author(s):  
Arkadiusz Nowak ◽  
Sylwia Nowak ◽  
Marcin Nobis
Keyword(s):  
Rice Field ◽  
Habitat Preferences ◽  
Altitudinal Distribution ◽  
Central Nepal ◽  
Plant Associations ◽  
Weed Communities ◽  
Phytosociological Relevés ◽  
Discrimination Factors ◽  
Water Vegetation

AbstractRice field weed communities occurring in central Nepal are presented in this study. The research was focussed on the classification of segetal plant communities occurring in paddy fields, which had been poorly investigated from a geobotanical standpoint. In all, 108 phytosociological relevés were sampled, using the Braun-Blanquet method. The analyses classified the vegetation into 9 communities, including 7 associations and one subassociation. Four new plant associations and one new subassociation were proposed: Elatinetum triandro-ambiguae, Mazo pumili-Lindernietum ciliatae, Mazo pumili-Lindernietum ciliatae caesulietosum axillaris, Rotaletum rotundifoliae and Ammanietum pygmeae. Due to species composition and habitat preferences all phytocoenoses were included into the Oryzetea sativae class and the Ludwigion hyssopifolio- octovalvis alliance. As in other rice field phytocoenoses, the main discrimination factors for the plots are depth of water, soil trophy and species richness. The altitudinal distribution also has a significant influence and separates the Rotaletum rotundifoliae and Elatinetum triandro-ambiguae associations. The study shows that anthropogenic rice fields can harbour relatively rich rush and water vegetation. More than 80 species were noted in the vegetation plots. Several of them are considered to be extremely rare and have been recorded on the world Red List.

First insights into weed communities of rice agrocoenoses in southern Thailand

2015 ◽  
Vol 45 (1) ◽  
pp. 157-174 ◽  
Author(s):  
Arkadiusz Nowak ◽  
Sylwia Nowak ◽  
Marcin Nobis
Keyword(s):  
Aquatic Vegetation ◽  
Rice Paddy ◽  
Rice Fields ◽  
Cultivated Rice ◽  
Data Set ◽  
Southern Thailand ◽  
Phytosociological Relevés ◽  
Discrimination Factors ◽  
Rice Paddy Fields

The study presents the results of geobotanical investigations conducted in rice fields in southern Thailand in 2013. It is focussed on the classification of plant communities poorly investigated from a geobotanical standpoint. Altogether 125 phytosociological relevés were collected, using the Braun-Blanquet method. We noted more than 100 species in the vegetation plots, including many rare ones. We classified the vegetation into seven communities, including six associations. Five associations are proposed as new: Nymphaeetum nouchali, Fimbristylido miliaceae-Sphenocleetum zeylanicae, Ischaemo rugosi-Cyperetum pulcherrimi, Pentapeto phoeniceae-Aeschynomenetum indicae and Marsileetum minutae. The distinctiveness in species composition compared to other Oryzetea sativae phytocoenoses justifies a new alliance: Ludwigion hyssopifolio-octovalvidis. The main discrimination factors for the data set were water depth and species richness. The study reveals that rice paddy fields are inhabited by a variety of littoral and aquatic vegetation types. In particular, non-intensively cultivated rice fields hold a diverse hydrophilous flora, especially taxa typical for mud or littoral habitats.

scholarly journals Vegetation Diversity of Screes and Taluses of The Pamir and South-Western Tian Shan in Middle Asia

2021 ◽  
Author(s):  
Arkadiusz Nowak ◽  
Sebastian Świerszcz ◽  
Sylwia Nowak ◽  
Marcin Nobis
Keyword(s):  
Species Composition ◽  
Arid Zone ◽  
Field Studies ◽  
Vegetation Diversity ◽  
Plant Associations ◽  
Middle Asia ◽  
Recent Developments ◽  
Phytosociological Relevés ◽  
High Degree ◽  
Tian Shan

AbstractThis paper presents the results of phytosociological research on scree vegetation of the Pamir and south-western Tian Shan. We collected 222 phytosociological relevés during field studies conducted in 2015–2019, applying the Braun-Blanquet approach. We identified 21 plant communities on mobile and stabilized screes of colluvial cones, aprons and fans, inhabiting mainly the montane and alpine belts in several ranges (e.g. Peter the First, Alichur, Shugnan, Shachdarian, Darvaz, Rushan, Vanch, Fergana, Kyrgyz and Terskey ranges). As a result we provide the first comprehensive hierarchical syntaxonomic synopsis of scree communities at montane and alpine elevations in the eastern Middle Asia. The collected vegetation relevés represent the majority of the variation among the phytocoenoses of gravel, pebble, cobble and rock block slides and screes in the montane and alpine belts. As a result of field studies and Twinspan analyses, nine associations were identified on screes of the Pamir and western Tian Shan. All these communities were assigned to the Sileno brahuicae-Lactucetalia orientalis Nowak et al. 2021. Additionally, within the nitrophilous compact gravel screes one subassociation of Corydalidetum kashgaricae trigonelletosum gontscharovii was distinguished. In the most arid zone two additional plant associations and one subassociation were identified in gravelly semi-deserts zone. The main factors determining the species composition of the studied associations are scree mobility, rock particle size, elevation above sea level and slope inclination. Our research revealed considerable diversity of scree habitats of montane and alpine belts what might be astonishing regarding harsh environment of this mountainous territory. However, a great number of lineages that evolved here and particularly rich species pool of this habitat in Middle Asia facilitate remarkable diversity among vegetation of taluses and screes. The distinctiveness of species composition is additionally enhanced by high degree of endemism of chasmophytic habitats in the eastern part of Middle Asia. Despite recent developments, the prominent chasmophytic vegetation of Middle Asia still needs thorough studies focused on its relationship to semi-desert, tall-forb and petrophytic communities of high mountains of the Pamir, Hindu-Kush, Kunlun and Central Tian Shan.

Numerical classification of French vegetation of Carici caryophylleae – Genistetea lobelii J.-C. Klein 1972

2021 ◽  
Vol 42 ◽  
pp. e68062
Author(s):  
Pauline Delbosc ◽  
Mathieu Le Dez ◽  
Jean-Bernard Bouzillé ◽  
Kevin Cianfaglione ◽  
Frédéric Bioret
Keyword(s):  
Expert System ◽  
Dominant Species ◽  
Numerical Classification ◽  
Distribution Map ◽  
Diagnostic Species ◽  
Plant Associations ◽  
Formal Definitions ◽  
Twinspan Classification ◽  
New Association

Carici-Genistetea lobelii Klein 1972 corresponds to cyrno-sardinian oromediterranean cushion scrub and related grasslands. In France, this class is only present in Corsica and the syntaxonomic scheme is debated among phytosociologists. The aim of this paper is to highlight the main plant associations of Carici-Genistetea lobelii Klein 1972 and to define the diagnostic species for each phytosociological unit. We compiled 519 vegetation plots and we applied EuropeanVegetationChecklist expert system for the classes of European vegetation to retain only vegetation plots belonging to Carici-Genistetea lobelii. We obtained a dataset with 189 vegetation plots and we classified them with Modified TWINSPAN classification. Our analyses recognized 6 plant associations and 3 sub-associations already described in the literature; and to describe a new alliance corresponding to the supra-mediterranean vegetations (Genistion salzmannii), a new association (Brimeuro fastigiatae-Juniperetum nanae) and its sub-association (alnetosum suaveolentis). For each of them, we identified diagnostic, constant and dominant species and produced their distribution map. Formal definitions were then written for each phytosociological unit (from subassociation to class) and grouped in an expert system to automatically classify the vegetations of Carici-Genistetea lobelii.

scholarly journals Altitudinal Distribution of Bryoflora at Chandragiri Mountain Forest of Kathmandu District, Central Nepal

2015 ◽  
Vol 28 ◽  
pp. 81-92
Author(s):  
Nirmala Pradhan
Keyword(s):  
New Records ◽  
Mountain Forest ◽  
Habitat Types ◽  
Altitudinal Distribution ◽  
The West ◽  
Moss Species ◽  
The Road ◽  
Central Nepal

Chandragiri Mountain forest in Kathmandu borders Makwanpur district to the west was least known for bryophytes till this study was conducted. This mountain forest with varying elevation ranges from 1365 to 2300 m offered different habitat types for diverse bryofloral species which included 58 species of 39 genera categorized under 27 families and nine orders. Of the recorded species 18 species were rare and five new records to country’s list. Sauteria spongiosa (Kashyap) S. Hatt., a rare moss species was not recorded in this study though was reported for the fi rst time at 2250 m of this mountain in 1982. The habitat of this moss has completely been destroyed now due to expansion of the road in this part.J. Nat. Hist. Mus. Vol. 28, 2014: 81-92

A synopsis of the bryocorine tribes (Heteroptera : Miridae : Bryocorinae): key, diagnoses, hosts and distributional patterns

2018 ◽  
Vol 32 (4) ◽  
pp. 866 ◽  
Author(s):  
Fedor V. Konstantinov ◽  
Anna A. Namyatova ◽  
Gerasimos Cassis
Keyword(s):  
Host Plant ◽  
Tabular Form ◽  
Morphological Heterogeneity ◽  
Plant Associations ◽  
Phylogenetic Studies ◽  
Distributional Patterns ◽  
Five Tribes

The higher classification of the mirid subfamily Bryocorinae has received comparatively little attention. It is not highly species-rich in comparison with other mirid subfamilies but does exhibit extraordinary morphological heterogeneity. In this work we provide a synthesis of the subfamily on a global basis, providing a new key and updated diagnoses of supraspecific taxa. Five tribes are recognised: Bryocorini, Dicyphini, Eccritotarsini, Felisacini and Monaloniini. The genus Campyloneura Fieber is transferred from the tribe Dicyphini to the Eccritotarsini. Analysis of distributional patterns and a survey of host plant associations are provided. Available data on distribution of the main bryocorine lineages are summarised in tabular form and evaluated using UPGMA methods, and geographically structured patterns were detected. The synthesis will enable users to identify bryocorines to tribal level with confidence and provides a classificatory framework for future revisionary and phylogenetic studies.

scholarly journals An Initial Classification of Neotropical Water Mites (Acari: Hydrachnidia) Based on Habitat Preferences

2011 ◽  
Vol 2011 ◽  
pp. 1-11 ◽  
Author(s):  
Hugo R. Fernández ◽  
Odile Fossati-Gaschignard
Keyword(s):  
Habitat Preferences ◽  
Special Importance ◽  
Running Waters ◽  
Water Mites ◽  
Functional Distribution ◽  
Mite Communities ◽  
The Vertical Distribution ◽  
Faunistic Composition ◽  
Initial Classification

Existing classifications of benthic and interstitial freshwater invertebrates are described and discussed. A classification is proposed for southern neotropical (south of latitude S 15) water mites in relation to their life style and habitat preferences. The classification includes planktonic, superficial, benthic, thermal, and subterranean forms. The diversity of the Hydrachnidia family and genera (22 families, 97 genera, and 521 species) is then analyzed using the new classification. Ubiquitous stygobites deserve special consideration because they move through ecotone zones and tolerate extreme conditions. Water mite communities from a north-western Argentinean stream were first described using a surber net and consequently considered as benthic. Nineteen Hydrachnidia species (from benthic to stygobite) were collected and classified. The vertical distribution observed during the year confirmed the permanent presence of benthic Hydrachnidia, even during the first flood, which is of special importance in running waters. The functional classification we propose will facilitate comparison of fauna from different areas that have different faunistic composition but may have similar functional distribution.

Vegetation diversity of the two Dinaric karstic rivers in Bosnia and Herzegovina

Biologia ◽  
2016 ◽  
Vol 71 (7) ◽  
Author(s):  
Anđelka Lasić ◽  
Nenad Jasprica
Keyword(s):  
Plant Communities ◽  
Bosnia And Herzegovina ◽  
Vegetation Diversity ◽  
Plant Associations ◽  
Phytosociological Relevés

AbstractPlant communities were studied along two oligotrophic karstic rivers – Trebižat and Lištica – from 2007 to 2009. Based on 93 phytosociological relevés, using Braun–Blanquet methods, a total of 25 plant associations were recognised in the rivers and nearby surveyed area. These associations have been subordinated to 11 alliances, eight orders and six classes:

scholarly journals Perubahan Penutupan Lahan Kota Bogor

2019 ◽  
Vol 2 (1) ◽  
pp. 44-51
Author(s):  
Ina Lidiawati ◽  
Ratna Sari Hasibuan ◽  
Retno Wijayanti
Keyword(s):  
Land Cover ◽  
Rice Field ◽  
Research Result ◽  
Land Cover Changes ◽  
Plantation Forest ◽  
Geospatial Information ◽  
Land Cover Map ◽  
Cover Class ◽  
The City

Pembangunan yang terjadi sangat pesat sehingga tutupan lahan di Kota Bogor berubah. Penelitian ini bertujuan untuk mengetahui tutupan lahan Kota Bogor yang berubah yaitu tahun 1996, 2006, 2016 dan  faktor-faktor yang mempengaruhi tutupan lahan Kota Bogor yang berubah tersebut. Perubahan tutupan lahan Kota Bogor dianalisis menggunakan perangkat lunak Arc.GIS 10.2. Data yang digunakan sebagai bahan analisis adalah peta tutupan lahan Kota Bogor 1996, 2006 dan 2016 dari Kementerian Lingkungan Hidup dan Kehutanan (KLHK) dan peta Rupa Bumi Indonesia (RBI). Hasil dari penelitian ini adalah klasifikasi kelas tutupan lahan hutan tanaman kota Bogor, area terbuka, pelabuhan/bandara, pemukiman/lahan, pertanian kering, pertanian kering, semak, sawah, perkebunan, dan badan air. Pada tahun 1996 tutupan lahan didominasi oleh vegetasi, semak, dan semak-semak. Perubahan tutupan lahan yang paling masif terjadi pada kelas permukiman / tanah dengan luas 6.683 hektar pada tahun 2006 dan 7.532 ha pada tahun 2016. Diperkirakan bahwa luas lahan yang akan dibangun akan terus bertambah seiring dengan pertambahan populasi. Peningkatan populasi menyebabkan lebih banyak ruang untuk perumahan dan berbagai kegiatan, selain kondisi sosial ekonomi dan arah kebijakan pemerintah yang mempengaruhi tutupan lahan kota Bogor menjadi berubah.   Development that occurred in the city of Bogor very rapidly causing land cover changes. This research purpose was to know the change of land cover of Bogor City in 1996, 2006, and 2016 and to know what factors influence the change of land cover. Changes in land cover in Bogor City were analyzed using Arc.GIS software 10.2. The data used as an analysis material were the land cover map of Bogor City 1996, 2006 and 2016 issued by the Ministry of Environment and Forestry and the map of  Rupa Bumi Indonesia issued by the Geospatial Information Agency. This research result was the classification of a land cover class of Bogor city of plantation forest, open area, port/airport, settlement/land, dry farm, dry farm, shrub, rice field, plantation, and water body. In 1996 the land cover was dominated by vegetation, shrubs, and bushes. The most massive land cover change occurred in the class of settlements/land with an area of ​​6,683 hectares in 2006 and 7,532 ha in the year 2016. It is estimated that the area of ​​land will be built will continue to grow as the population increases. The increase in population causes more space for housing and various activities, besides the socio-economic condition and the direction of government policy also affect the change of land cover in Bogor city.

scholarly journals Dry Grasslands in the Slovenský Kras MTS (Slovakia) and the Aggteleki-karszt MTS (Hungary) — A Comparison of Two Classification Approaches

Hacquetia ◽  
2008 ◽  
Vol 7 (2) ◽  
pp. 123-140 ◽  
Author(s):  
Daniela Dübravková-Michálková ◽  
Monika JanišOvá ◽  
Jiří Kolbek ◽  
Róbert Šuvada ◽  
Viktor Virók ◽  
...  
Keyword(s):  
Expert System ◽  
Central Europe ◽  
Numerical Classification ◽  
Grassland Vegetation ◽  
Dry Grassland ◽  
Dry Grasslands ◽  
Unsupervised Method ◽  
Formal Definitions ◽  
Phytosociological Relevés

Dry Grasslands in the Slovenský Kras MTS (Slovakia) and the Aggteleki-karszt MTS (Hungary) — A Comparison of Two Classification ApproachesThe paper brings numerical classification of 48 new phytosociological relevés of dry grassland vegetation from the Slovenský kras Mts and the Aggteleki-karszt Mts located on the border between Slovakia and Hungary (Central Europe). We performed a comparison of two classification approaches (an unsupervised method - modified TWINSPAN, and a supervised approach - electronic expert system based on formal definitions of associations), which were applied on the same dataset. Four associations were distinguished:Campanulo divergentiformis-Festucetum pallentisZólyomi (1936) 1966,Poo badensis-Caricetum humilis(Dostál 1933) Soó ex Michálková in Janišová et al. 2007,Alysso heterophylli-Festucetum valesiacae(Dostál 1933) Kliment in Kliment et al. 2000 andFestuco rupicolae-Caricetum humilisKlika 1939. A newly recorded stand of the rareStipetum tirsaeMeusel 1938 association is characterised. What is more, we established a neotype of theAlysso heterophylli-Festucetum valesiacaeassociation.

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